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International Dental Journal logoLink to International Dental Journal
. 2023 Oct 12;74(2):207–215. doi: 10.1016/j.identj.2023.08.002

Periodontal Disease, Tooth Loss, and Systemic Conditions: An Exploratory Study

Georgios S Chatzopoulos a,b,, Ziou Jiang c, Nicholas Marka c, Larry F Wolff a
PMCID: PMC10988265  PMID: 37833208

Abstract

Background

Although systemic medical conditions are associated with periodontitis and tooth loss, large-scale studies that include less prevalent systemic conditions are needed. The purpose of the study was to investigate the link between periodontal disease and tooth loss with systemic medical conditions in a large and diverse population.

Methods

Dental charts of adult patients who had attended the dental clinics seeking dental therapy of the universities contributing data to the BigMouth network and accepted the protocol of the study were included. Dental Procedure Codes and Current Procedural Terminology procedures were utilised to identify patients with and without periodontitis. Data were extracted from patients’ electronic health records including demographic characteristics, dental procedural codes, and self-reported medical conditions as well as the number of missing teeth.

Results

A total of 108,307 records were ultimately included in the analysis; 42,377 of them included a diagnosis of periodontitis. The median age of the included population was 47.0 years, and 55.2% were female. Older and male individuals were significantly more likely to be in the periodontitis group and have higher number of missing teeth. A number of systemic conditions are associated with periodontitis and a higher number of missing teeth. High blood pressure, smoking, drug use, and diabetes were all found to be significant. Other significant conditions were anaemia, lymphoma, glaucoma, dialysis, bronchitis, sinusitis hepatitis, and asthma.

Conclusions

Within the limitations of this retrospective study that utilised the BigMouth dental data repository, the association of a number of systemic conditions such as smoking, diabetes, and hypertension with periodontitis and tooth loss has been confirmed. Additional connections have been highlighted for conditions that are not commonly reported in the literature.

Key words: Epidemiology, Oral health, Oral-systemic disease, Periodontal disease, Tooth loss

Background

Periodontal disease is a chronic noncommunicable inflammatory disease that affects the integrity of the tooth-supporting tissues when an imbalance interaction occurs between the periodontal microbiome and the inflammatory response of the host.1 Periodontal disease is the sixth most prevalent condition worldwide, and at least 10% of the adult population has a severe form of the disease.2,3 Apart from its negative impact on oral health, evidence over the last 30 years has revealed the relationships between oral diseases, including periodontitis, and a variety of systemic conditions.4 Periodontitis adversely impacts systemic health through biologically plausible mechanisms, whilst its successful treatment can modify the risk of disease comorbidities.4

In 2013, experts from the European Federation of Periodontology and the American Academy of Periodontology reviewed the available evidence regarding the associations between periodontal and systemic diseases and concluded that periodontitis contributes to the systemic inflammatory response.5, 6, 7, 8 In another review that examined potential associations between periodontitis and other systemic conditions including chronic kidney disease, rheumatoid arthritis, cognitive impairment, inflammatory cancers, and obesity, modest associations were found with obesity and weak associations with rheumatoid arthritis, cognitive impairment, and oropharyngeal cancer.9 A systematic mapping of trial registers evaluated 2015 Medical Subject Headings (MesH) terms for systemic conditions and reported associations between periodontal disease and 57 systemic conditions, which covers about 2% of the diseases indexed in MeSH.10

The associations between periodontal disease and systemic medical conditions may be a result of inflammatory mechanisms or due to a disruptive host immune response.11 Susceptible hosts in patients with systemic conditions may negatively impact the homeostatic balance and initiate a state of disease. Presence of systemic conditions, obesity, smoking, stress, and ageing characterise a susceptible host that can shift the polymicrobial synergy towards dysbiosis and may influence the progression and severity of periodontal disease.12 It is imperative to understand whether there is a link between periodontal disease and associated comorbidities. According to the periodontal classification developed at the 2017 World Workshop, the presence of systemic risk associated conditions and diseases including smoking and diabetes are considered in the grading process.13 Patients with syndromes such as Papillon-Lefevre are also classified as having “periodontitis as a manifestation of systemic diseases.”14 Therefore, detecting the associations between periodontal disease and systemic medical conditions can provide a holistic approach to patient care management.

Electronic dental records are effectively used to answer focussed research questions and allow efficient public health surveillance with respect to disease prevalence amongst other factors.15 Surveillance of medical conditions amongst dental patients and mining associations between periodontal and medical conditions can be provided using electronic health and dental records. The BigMouth Dental Data Repository was developed in 2012 using partially de-identified electronic health records from 11 dental schools in the US. This dental data repository can be used to investigate relationships between oral conditions such as periodontitis and systemic conditions.16 The BigMouth Dental Data Repository is a multi-institutional dental data repository that is derived from electronic health records of dental institutions in the US aiming to improve oral health research, education, and treatment. It provides information regarding the feasibility of research studies, facilitates population-based observation studies, supports quality improvement efforts, and assists researchers in identifying clinical trial cohorts for recruitment. It is critically important to recognise the interrelationship between the oral cavity and the general systemic health status of an individual. However, further large-scale studies should be performed.

The purposes of this study are to (1) assess the prevalence of systemic medical conditions, (2) investigate the relationship between periodontal disease and systemic conditions, and (3) examine the link between medical conditions and the extent of missing teeth in a large and diverse population. Using a large database allows generalisability across multiple dental institutions, plays a key role in developing preventative care models, and may assist practitioners in providing a more accurate and enhanced treatment.

Methods

This cross-sectional, retrospective study was reviewed by the Institutional Review Board of the University of Minnesota and determined that it is not research involving human subjects as defined by the Department of Health and Human Services as well as the United States Food and Drug Administration (STUDY00016576). It was further reviewed and approved by the BigMouth Consortium for Oral Health Research and Informatics clinical review committee. This study was conducted in agreement with the Helsinki Declaration of 1975 as most recently revised in 2013.

The BigMouth Dental Data Repository was utilised to extract electronic health records from 2011 through 2021. Dental charts of adult patients who had attended the dental clinics seeking dental therapy of the universities contributing data to the BigMouth network and accepted the protocol of the study were evaluated: Harvard University; University of Texas Health; The University of California, San Francisco; University of Colorado; Loma Linda University; University of Buffalo; The University of Iowa; and The University of Minnesota. Electronic health records were entered during patients’ visits by dental students, residents, and faculty oral health care providers. Dental Procedure Codes and Current Procedural Terminology procedures were utilised. Current Dental Terminology (CDT) is a code set for dental diagnoses and treatments with descriptive terms developed and updated by the American Dental Association (ADA) for reporting dental services and procedures to dental benefits plans. Patients with at least one completed treatment code D0150 (comprehensive oral evaluation), D0120 (periodic oral evaluation provided to an established patient), or D0180 (comprehensive restorative and periodontal exam) were included.

Patients were categorised into 2 groups based on the presence of planned or completed CDT codes:

  • Group 1: Periodontitis group when the following CDT codes “D4210” OR “D4211” OR D4240” OR “D4241” OR “D4245” OR “D4260” OR “D4261” OR “D4263” OR “D4266” OR “D4274” OR “D4341” OR “D4342” OR “D4910” were utilised. These CDT codes are used for nonsurgical and surgical treatment of periodontal disease.

  • Group 2: Non-periodontitis group when patients had at least one D1110 code (dental prophylaxis in the absence of periodontal disease) and none of the CDT codes in group 1.

Relevant data were extracted from patients’ electronic health records, including demographic characteristics, dental procedural codes, and self-reported medical conditions of patients who met the inclusion criteria of the study. In addition, the number of missing teeth and the number of lost teeth after the first periodontal maintenance/recall visit were recorded. The independent variables included were as follows:

  • Demographic characteristics: age (at the time of CDT code completion); ethnicity; race; gender; self-reported alcohol consumption.

  • CDT: D4210, D4211, D4240, D4241, D4245, D4260, D4261, D4263, D4266, D4274, D4341, D4342, D4910, and D1110.

  • Self-reported medical conditions: Self-reported systemic diseases are based on a patient questionnaire that is completed at the initial visit and updated every 6 to 12 months.

Statistical analysis

Patients’ demographic and clinical characteristics were summarised as means and standard deviations or medians and interquartile ranges (IQRs) for continuous variables, as appropriate, and frequencies and percentages for categorical variables. Normality was assessed using density plots. Between healthy patients and those with periodontal disease, Wilcoxon rank sum, negative binomial regression, and Chi-square tests were used for comparison of continuous, count, and categorical characteristics, respectively. Univariate associations between systemic medical conditions and periodontal disease status were assessed using a logistic regression model with results presented as odds ratios (ORs) and their corresponding 95% confidence intervals (CIs). Negative binomial regression models were used to assess associations between medical conditions and tooth loss, with results presented as incident rate ratios (RRs) and their corresponding 95% CIs. Multivariable regression models were explored for the above outcomes, adjusting for the effects of age and gender. For all multivariable regression models, P values were corrected for multiple comparisons using the Holm method. All analyses were based on complete cases and were conducted at the .05 significance level using the R environment (Version 4.2.1).

Results

A total of 164,892 patients’ records were identified in the BigMouth Dental Data Repository using the inclusion and exclusion criteria of the study. Out of these initially screened records, a total of 108,307 records were ultimately included in the analysis after excluding records with missing data. The demographic characteristics of the included population are shown in Table 1. The periodontitis group included individuals who were significantly older (P < .001) and had a significantly higher proportion of males (P < .001), Hispanics (P < .001), as well as African Americans and Hispanics or Latinos (P < .001). The numbers of missing teeth were also significantly different between the periodontitis and non-periodontitis groups, and the former demonstrated a significantly higher number of missing teeth (P < .001). Alcohol consumption was more frequently reported by patients with periodontitis (P = .033) than without periodontitis. Both age (P < .001) and gender (P < .001) were significantly associated with periodontal status. Similar significant associations were identified for age (P < .001) and gender (P < .001) for the number of missing teeth.

Table 1.

Demographic characteristics of the included population.

Characteristics Overall (N = 108,307) Non-periodontitis group (n = 65,930) Periodontitis group (n = 42,377) P value
Age, median (IQR) 47.00 (31.00, 62.00) 39.00 (27.00, 58.00) 55.00 (41.00, 65.00) <.001
Age, mean (SD) 47.35 (17.91) 43.44 (18.17) 53.44 (15.65)
Gender, No. (%) Female 59,756 (55.2) 38,306 (58.1) 21,450 (50.6) <.001
Male 48,514 (44.8) 27,595 (41.9) 20,919 (49.4)
Other 37 (0.0) 29 (0.0) 8 (0.0)
Ethnicity, No. (%) Non-Hispanic 63,724 (79.3) 37,827 (80.4) 25,897 (77.9) <.001
Hispanic 12,206 (15.2) 6312 (13.4) 5894 (17.7)
Other 4390 (5.5) 2917 (6.2) 1473 (4.4)
Race, No. (%) White 69,553 (64.2) 44,254 (67.1) 25,299 (59.7)
American Indian 300 (0.3) 185 (0.3) 115 (0.3) .4821
Asian 7771 (7.2) 5049 (7.7) 2722 (6.4) .0191
African American 11,982 (11.1) 6033 (9.2) 5949 (14.0) <.0011
Hispanic or Latino 6896 (6.4) 3246 (4.9) 3650 (8.6) <.0011
Other 6544 (6.0) 4237 (6.4) 2307 (5.4) .0721
Pacific islander 110 (0.1) 69 (0.1) 41 (0.1) .8451
2 or more races 5151 (4.8) 2857 (4.3) 2294 (5.4) <.0011
Race, No. (%) White 72,086 (66.6) 45,799 (69.5) 26,287 (62.0) <.001
Non-White 36,221 (33.4) 20,131 (30.5) 16,090 (18.0)
Missing teeth, mean (SD) 1.43 (2.71) 1.08 (2.42) 1.98 (3.02) <.0012
Missing teeth, median (IQR) 0.00 (0.00, 2.00) 0.00 (0.00, 1.00) 1.00 (0.00, 3.00)
Alcohol consumption, No. (%) 34,390 (31.8) 20,774 (31.5) 13,616 (32.1) .033

Data obtained from 8 dental schools in the US that contribute data to the BigMouth network and accepted the protocol of the study. A total of 164,892 patients’ records were identified in the BigMouth Dental Data Repository, whilst 108,307 records were ultimately included in the analysis after excluding records with missing data.

*The level of significance was set at .05.

1

Based on univariable logistic regression and comparison to White reference group.

2

Based on univariable negative binomial regression.

IQR, interquartile range.

Prevalence of self-reported systemic conditions

The prevalence of the examined self-reported systemic medical conditions for all patients and compared between patients with and without periodontitis are presented in Table 2. Smoking was reported by 10.76% of the included population, and it was significantly more prevalent in the periodontitis group (P < .001). Amongst the most prevalent systemic medical conditions were high blood pressure (22.13%), cardiovascular problems (17.61%), arthritis (12.05%), depression (8.73%), and cancer (7.73%). Significant differences were observed between patients with and without periodontitis for a number of conditions. Amongst others, cancer, cardiovascular problems, high blood pressure, diabetes, glaucoma, kidney disease, arthriti,s and osteoporosis were significantly (P < .001) more prevalent in the periodontitis group. In contrast, anaemia, anxiety, depression, and asthma were more often observed in the non-periodontitis group (P < .001).

Table 2.

Prevalence of the examined self-reported systemic medical conditions and smoking for all patients and compared between non-periodontitis and periodontitis groups.

Self-reported medical conditions and smoking Overall (n = 108,307) Non-periodntitis (n = 65,930) Periodontitis (n = 42,377) OR (95% CI) P value
Smoking, No. (%) 10.756 9.076 13.370 1.546 (1.488–1.607) <.001
Anaemia, No. (%) 1.806 1.984 1.529 0.767 (0.698–0.844) <.001
Bleeding disorders, No. (%) 1.761 1.864 1.600 0.856 (0.779–0.941) .001
Lymphoma, No. (%) 0.137 0.094 0.203 2.160 (1.558–2.995) <.001
Blood haemotologic disorders, No. (%) 1.222 1.045 1.498 1.440 (1.292–1.606) <.001
Leukaemia, No. (%) 0.058 0.038 0.090 2.366 (1.428–3.920) .001
Multiple myeloma, No. (%) 0.008 0.006 0.012 1.945 (0.522–7.243) .321
Malignant, No. (%) 7.726 6.689 9.340 1.437 (1.374–1.503) <.001
Angina, No. (%) 0.720 0.632 0.857 1.357 (1.179–1.563) <.001
Cardiovascular heart problem, No. (%) 17.609 14.758 22.045 1.633 (1.583–1.686) <.001
Congenital heart disease, No. (%) 0.331 0.196 0.540 2.771 (2.233–3.440) <.001
Coronary heart disease, No. (%) 0.784 0.493 1.237 2.527 (2.199–2.904) <.001
History of endocarditis, No. (%) 0.126 0.111 0.149 1.343 (0.959–1.882) .086
Heart attack, No. (%) 1.178 0.869 1.659 1.924 (1.722–2.150) <.001
High blood pressure, No. (%) 22.133 17.500 29.341 1.958 (1.902–2.015) <.001
Implanted defibrillator, No. (%) 2.031 1.791 2.405 1.351 (1.241–1.470) <.001
Rheumatic fever, No. (%) 0.147 0.100 0.219 2.195 (1.601–3.010) <.001
Cocaine use, No. (%) 0.548 0.570 0.514 0.902 (0.763–1.066) .225
Heroin use, No. (%) 0.029 0.020 0.042 2.155 (1.056–4.398) .035
Marijuana use, No. (%) 2.084 1.788 2.544 1.434 (1.319–1.558) <.001
Methamphetamine use, No. (%) 0.150 0.091 0.241 2.649 (1.925–3.645) <.001
Anorexia, No. (%) 0.356 0.463 0.191 0.412 (0.322–0.527) <.001
Bulimia, No. (%) 0.142 0.190 0.068 0.361 (0.241–0.540) <.001
Andrenal gland disorder, No. (%) 0.069 0.059 0.085 1.436 (0.913–2.260) .117
Diabetes, No. (%) 8.339 6.466 11.254 1.834 (1.757–1.915) <.001
Thyroid problems, No. (%) 5.593 5.225 6.166 1.192 (1.131–1.256) <.001
Glaucoma, No. (%) 3.365 2.542 4.644 1.867 (1.747–1.995) <.001
AIDS, No. (%) 0.042 0.044 0.038 0.858 (0.466–1.580) .624
HIV, No. (%) 0.421 0.381 0.484 1.272 (1.057–1.530) .011
STD, No. (%) 0.733 0.754 0.701 0.929 (0.804–1.073) .319
Dialysis, No. (%) 0.268 0.171 0.418 2.443 (1.929–3.094) <.001
Kidney, No. (%) 5.592 5.016 6.487 1.314 (1.247–1.384) <.001
Renal failure or insufficiency, No. (%) 0.892 0.731 1.142 1.569 (1.382–1.781) <.001
Arthritis, No. (%) 12.051 10.120 15.055 1.574 (1.517–1.633) <.001
Lupus, No. (%) 0.262 0.262 0.262 0.998 (0.786–1.267) .988
Osteoporosis, No. (%) 2.945 2.624 3.445 1.324 (1.234–1.421) <.001
Dementia, No. (%) 0.336 0.311 0.375 1.207 (0.981–1.486) .075
Anxiety, No. (%) 4.771 5.407 3.780 0.687 (0.647–0.730) <.001
Depression, No. (%) 8.728 9.901 6.902 0.675 (0.645–0.706) <.001
Parkinson disease, No. (%) 0.170 0.140 0.217 1.557 (1.166–2.079) .003
Multiple sclerosis, No. (%) 0.164 0.176 0.146 0.831 (0.611–1.132) .241
Seizure or epilepsy, No. (%) 0.827 0.751 0.946 1.263 (1.106–1.441) .001
Stroke, No. (%) 1.227 1.054 1.496 1.426 (1.279–1.589) <.001
Organ transplant, No. (%) 0.329 0.300 0.373 1.242 (1.008–1.532) .042
Asthma, No. (%) 6.931 7.590 5.907 0.764 (0.727–0.803) <.001
Bronchitis, No. (%) 2.345 1.631 3.457 2.160 (1.995–2.340) <.001
Chronic bronchitis or emphysema, No. (%) 4.889 5.231 4.356 0.825 (0.779–0.874) <.001
Respiratory or lung problem, No. (%) 1.961 1.853 2.129 1.152 (1.056–1.256) .001
Sinusitis, No. (%) 2.702 2.274 3.367 1.498 (1.392–1.612) <.001
Sleep apnoea, No. (%) 2.729 2.219 3.523 1.609 (1.496–1.731) <.001
Crohn's disease, No. (%) 0.185 0.180 0.191 1.059 (0.798–1.405) .690
Tuberculosis, No. (%) 1.692 1.197 2.464 2.085 (1.900–2.289) <.001
Cirrhosis or chronic hepatitis, No. (%) 1.610 0.884 2.740 3.157 (2.856–3.490) <.001
Gastrointestinal disorders, No. (%) 1.927 1.673 2.322 1.397 (1.281–1.524) <.001
Hepatitis, No. (%) 3.148 2.437 4.255 1.779 (1.661–1.905) <.001

*Univariate associations between systemic medical conditions and periodontal disease status were assessed using a logistic regression model with results presented as odds ratios (ORs) and their corresponding 95% confidence intervals (CIs). The level of significance was set at .05.

Association between systemic medical conditions and tooth loss

The mean tooth loss for all patients and compared between self-reported systemic medical conditions and smoking is demonstrated in Table 3. Methamphetamine users exhibited the highest number of missing teeth (3.41 teeth), whilst individuals with gastrointestinal disorder (0.87 teeth), multiple myeloma (0.89 teeth), and respiratory or lung problems (0.84 teeth) showed the lowest. Significant differences were identified between some systematic medical conditions and the number of missing teeth. Anaemia, bleeding disorders, lymphoma, cancer, angina, cardiovascular disease, congenital heart disease, coronary heart disease, heart attack, high blood pressure, implanted defibrillator, smoking, cocaine use, marijuana use, methamphetamine use, diabetes, thyroid problems, glaucoma, HIV infection, dialysis, kidney disease, renal failure, arthritis, lupus, osteoporosis, dementia, depression, Parkinson disease, seizures or epilepsy, stroke, asthma, bronchitis, chronic bronchitis, respiratory or lung problems, sinusitis, sleep apnoea, tuberculosis, cirrhosis or chronic hepatitis, gastrointestinal disorders, and hepatitis were significantly associated with higher number of missing teeth in the periodontitis group (P < .05). The mean tooth loss by periodontitis status and systemic medical conditions is shown in the Supplementary Table.

Table 3.

Mean tooth loss for all patients and compared between self-reported systemic medical conditions and smoking.

Self-reported medical conditions and smoking Tooth loss Rate ratio (95% CI) P value
ANEMIA NO 1.427 1.247 (1.148–1.355) <.001
ANEMIA YES 1.779
BLEEDING_DISORDERS NO 1.420 1.535 (1.414–1.667) <.001
BLEEDING_DISORDERS YES 2.180
LYMPHOMA NO 1.432 1.496 (1.115–2.007) .007
LYMPHOMA YES 2.142
BLOOD_HEMOTOLOGICAL_DISORDERS NO 1.432 1.093 (0.987–1.209) .087
BLOOD_HEMOTOLOGICAL_DISORDERS YES 1.564
LEUKEMIA NO 1.433 1.485 (0.946–2.330) .086
LEUKEMIA YES 2.127
MULTIPLE_MYELOMA NO 1.433 0.620 (0.168–2.285) .473
MULTIPLE_MYELOMA YES 0.889
MALIGNANT NO 1.398 1.321 (1.268–1.376) <.001
MALIGNANT YES 1.847
ANGINA NO 1.429 1.419 (1.248–1.615) <.001
ANGINA YES 2.028
CARDIOVASCULAR_HEART_PROBLEM NO 1.320 1.485 (1.443–1.529) <.001
CARDIOVASCULAR_HEART_PROBLEM YES 1.961
CONGENITAL_HEART_DISEASE NO 1.431 1.511 (1.251–1.826) <.001
CONGENITAL_HEART_DISEASE YES 2.162
CORONARY_HEART_DISEASE NO 1.426 1.644 (1.454–1.858) <.001
CORONARY_HEART_DISEASE YES 2.344
HISTORY_OF_ENDOCARDITIS NO 1.433 0.954 (0.694–1.312) .773
HISTORY_OF_ENDOCARDITIS YES 1.368
HEART_ATTACK NO 1.421 1.698 (1.537–1.876) <.001
HEART_ATTACK YES 2.414
HIGH_BLOOD_PRESSURE NO 1.243 1.693 (1.650–1.738) <.001
HIGH_BLOOD_PRESSURE YES 2.104
IMPLANT_DEFIBRILLATOR NO 1.415 1.625 (1.505–1.754) <.001
IMPLANT_DEFIBRILLATOR YES 2.300
RHEUMATIC_FEVER NO 1.433 1.225 (0.918–1.634) .168
RHEUMATIC_FEVER YES 1.755
SMOKING NO 1.348 1.590 (1.535–1.647) <.001
SMOKING YES 2.143
COCAINE_USE NO 1.431 1.259 (1.084–1.461) .002
COCAINE_USE YES 1.801
HEROIN_USE NO 1.433 1.486 (0.782–2.824) .227
HEROIN_USE YES 2.129
MARIJUANA_USE NO 1.424 1.292 (1.197–1.396) <.001
MARIJUANA_USE YES 1.841
METHAMPHETAMINE_USE NO 1.430 2.387 (1.816–3.138) <.001
METHAMPHETAMINE_USE YES 3.414
ANOREXIA NO 1.433 1.049 (0.869–1.265) .620
ANOREXIA YES 1.503
BULIMIA NO 1.433 0.974 (0.722–1.313) .863
BULIMIA YES 1.396
ANDRENAL_GLAND_DISORDER NO 1.433 0.958 (0.624–1.471) .845
ANDRENAL_GLAND_DISORDER YES 1.373
DIABETES NO 1.361 1.640 (1.577–1.705) <.001
DIABETES YES 2.231
THYROID_PROBLEMS NO 1.426 1.087 (1.035–1.141) .001
THYROID_PROBLEMS YES 1.550
GLAUCOMA NO 1.418 1.320 (1.242–1.403) <.001
GLAUCOMA YES 1.872
AIDS NO 1.433 1.272 (0.741–2.181) .383
AIDS YES 1.822
HIV NO 1.432 1.221 (1.029–1.447) .022
HIV YES 1.748
STD NO 1.432 1.112 (0.976–1.267) .111
STD YES 1.592
DIALYSIS NO 1.431 1.547 (1.254–1.908) <.001
DIALYSIS YES 2.214
KIDNEY NO 1.392 1.532 (1.462–1.606) <.001
KIDNEY YES 2.133
RENAL_FAILURE_OR_INSUFFICIENCY NO 1.426 1.556 (1.387–1.746) <.001
RENAL_FAILURE_OR_INSUFFICIENCY YES 2.219
ARTHRITIS NO 1.365 1.412 (1.365–1.460) <.001
ARTHRITIS YES 1.927
LUPUS NO 1.432 1.412 (1.141–1.747) .002
LUPUS YES 2.021
OSTEOPOROSIS NO 1.424 1.227 (1.149–1.309) <.001
OSTEOPOROSIS YES 1.746
DEMENTIA NO 1.430 1.590 (1.319–1.917) <.001
DEMENTIA YES 2.275
ANXIETY NO 1.433 0.999 (0.948–1.054) .983
ANXIETY YES 1.432
DEPRESSION NO 1.392 1.341 (1.289–1.394) <.001
DEPRESSION YES 1.866
PARKINSON_DISEASE NO 1.432 1.381 (1.059–1.801) .017
PARKINSON_DISEASE YES 1.978
MULTIPLE_SCLEROSIS NO 1.433 1.255 (0.956–1.647) .101
MULTIPLE_SCLEROSIS YES 1.798
SEIZURE_OR_EPILEPSY NO 1.432 1.137 (1.006–1.285) .040
SEIZURE_OR_EPILEPSY YES 1.627
STROKE NO 1.421 1.722 (1.562–1.899) <.001
STROKE YES 2.446
ORGAN_TRANSPLANT NO 1.433 1.116 (0.919–1.355) .269
ORGAN_TRANSPLANT YES 1.598
ASTHMA NO 1.398 1.365 (1.308–1.425) <.001
ASTHMA YES 1.908
BRONCHITIS NO 1.423 1.295 (1.204–1.392) <.001
BRONCHITIS YES 1.843
CHRONIC_BRONCHITIS_OR_EMPHYSEMA NO 1.395 1.553 (1.476–1.633) <.001
CHRONIC_BRONCHITIS_OR_EMPHYSEMA YES 2.167
RESPIRATORY_OR_LUNG_PROBLEM NO 1.445 0.579 (0.531–0.631) <.001
RESPIRATORY_OR_LUNG_PROBLEM YES 0.837
SINUSITIS NO 1.425 1.203 (1.123–1.288) <.001
SINUSITIS YES 1.714
SLEEP_APNEA NO 1.419 1.353 (1.266–1.448) <.001
SLEEP_APNEA YES 1.921
CHRONS_DISEASE NO 1.433 1.110 (0.856–1.438) .431
CHRONS_DISEASE YES 1.590
TUBERCULOSIS NO 1.424 1.369 (1.257–1.490) <.001
TUBERCULOSIS YES 1.949
CIRRHOSIS_OR_CHRONIC_HEPATITIS NO 1.425 1.372 (1.258–1.497) <.001
CIRRHOSIS_OR_CHRONIC_HEPATITIS YES 1.955
GASTRO_INTESTINAL_DISORDERS NO 1.444 0.600 (0.550–0.654) <.001
GASTRO_INTESTINAL_DISORDERS YES 0.866
HEPATITIS NO 1.418 1.343 (1.261–1.430) <.001
HEPATITIS YES 1.904

*Negative binomial regression models were used to assess associations between medical conditions and tooth loss with results presented as incident rate ratios (RRs) and their corresponding 95% confidence intervals. The level of significance was set at .05.

The multivariable negative binomial regression analysis for the association between systemic medical conditions and number of teeth lost adjusted for age and gender is shown in Table 4. Individuals self-reporting anaemia, bleeding disorders, cardiovascular diseases, heart attack, high blood pressure, implanted defibrillator, smoking, cocaine use, marijuana use, methamphetamine use, diabetes, kidney disease, renal failure, arthritis, lupus, depression, stroke, asthma, and chronic bronchitis exhibited a significantly higher incident rate of tooth loss (P < .05). In contrast, patients with gastrointestinal disorders and respiratory or lung problems displayed a significantly lower incident rate of tooth loss (P < .001).

Table 4.

Multivariable negative binomial regression analysis for the association between systemic medical conditions and number of tooth loss adjusted for age and gender.

Self-reported systemic medical conditions and smoking RR 95% CI P value*
ANEMIA 1.280 (1.180–1.388) <.001
BLEEDING_DISORDERS 1.469 (1.356–1.592) <.001
LYMPHOMA 1.390 (1.044–1.850) .700
BLOOD_HEMOTOLOGICAL_ DISORDERS 1.025 (0.929–1.132) >.99
LEUKEMIA 1.328 (0.860–2.051) >.99
MULTIPLE_MYELOMA 0.512 (0.145–1.805) >.99
MALIGNANT 1.003 (0.962–1.046) >.99
ANGINA 1.155 (1.018–1.309) .700
CARDIOVASCULAR_HEART_ PROBLEM 1.191 (1.156–1.227) <.001
CONGENITAL_HEART_DISEASE 1.105 (0.919–1.329) >.99
CORONARY_HEART_DISEASE 1.125 (0.998–1.267) >.99
HISTORY_OF_ENDOCARDITIS 0.753 (0.552–1.026) >.99
HEART_ATTACK 1.189 (1.078–1.311) .018
HIGH_BLOOD_PRESSURE 1.327 (1.290–1.365) <.001
IMPLANT_DEFIBRILLATOR 1.350 (1.252–1.454) <.001
RHEUMATIC_FEVER 0.977 (0.738–1.293) >.99
SMOKING 1.501 (1.450–1.553) <.001
COCAINE_USE 1.309 (1.132–1.514) .010
HEROIN_USE 1.584 (0.850–2.953) >.99
MARIJUANA_USE 1.364 (1.265–1.471) <.001
METHAMPHETAMINE_USE 2.501 (1.919–3.259) <.001
ANOREXIA 1.242 (1.033–1.493) .635
BULIMIA 1.283 (0.957–1.720) >.99
ANDRENAL_GLAND_DISORDER 0.875 (0.575–1.332) >.99
DIABETES 1.355 (1.303–1.408) <.001
THYROID_PROBLEMS 0.959 (0.914–1.007) >.99
GLAUCOMA 1.017 (0.958–1.080) >.99
AIDS 1.160 (0.687–1.960) >.99
HIV 1.099 (0.931–1.297) >.99
STD 1.155 (1.017–1.312) .718
DIALYSIS 1.292 (1.053–1.585) .437
KIDNEY 1.267 (1.209–1.328) <.001
RENAL_FAILURE_OR_ INSUFFICIENCY 1.315 (1.176–1.471) <.001
ARTHRITIS 1.139 (1.101–1.179) <.001
LUPUS 1.482 (1.205–1.823) .007
OSTEOPOROSIS 1.010 (0.947–1.078) >.99
DEMENTIA 1.047 (0.873–1.257) >.99
ANXIETY 1.046 (0.993–1.101) >.99
DEPRESSION 1.414 (1.362–1.469) <.001
PARKINSON_DISEASE 0.993 (0.768–1.285) >.99
MULTIPLE_SCLEROSIS 1.238 (0.951–1.613) >.99
SEIZURE_OR_EPILEPSY 1.188 (1.054–1.338) .150
STROKE 1.397 (1.270–1.536) <.001
ORGAN_TRANSPLANT 0.949 (0.785–1.148) >.99
ASTHMA 1.307 (1.253–1.363) <.001
BRONCHITIS 1.064 (0.991–1.143) >.99
CHRONIC_BRONCHITIS_OR_ EMPHYSEMA 1.460 (1.390–1.533) <.001
RESPIRATORY_OR_LUNG_PROBLEM 0.529 (0.485–0.576) <.001
SINUSITIS 1.061 (0.992–1.134) >.99
SLEEP_APNEA 1.111 (1.040–1.186) .059
CHRONS_DISEASE 1.138 (0.883–1.467) >.99
TUBERCULOSIS 1.016 (0.935–1.104) >.99
CIRRHOSIS_OR_CHRONIC_ HEPATITIS 1.061 (0.974–1.155) >.99
GASTRO_INTESTINAL_DISORDERS 0.541 (0.496–0.590) <.001
HEPATITIS 1.123 (1.056–1.195) .008

Multivariable regression models were explored adjusting for the effects of age and gender. Holm method is used to adjust P values for multiple comparison.

Association between systemic medical conditions and periodontal status

The multivariable logistic regression analysis for the association between systemic medical conditions and periodontal status adjusted for age and gender is shown in Table 5. Individuals reporting lymphoma, blood haematologic disorders, congenital heart disease, high blood pressure, smoking, marijuana use, methamphetamine use, diabetes, glaucoma, dialysis, seizure or epilepsy, bronchitis, sinusitis, tuberculosis, cirrhosis or chronic hepatitis, gastrointestinal disorders, and hepatitis exhibited significantly higher odds of having periodontitis (P < .05). Anaemia, bleeding disorders, cancer, anorexia, thyroid problems, kidney disease, osteoporosis, dementia, anxiety, depression, asthma, and chronic bronchitis or emphysema were significantly less likely to be associated with periodontitis (P < .05). Methamphetamine users displayed the highest odds of having periodontitis (OR, 2.891; 95% CI, 2.09–4.01) amongst all significant conditions.

Table 5.

Multivariable logistic regression analysis for the association between systemic medical conditions and periodontal status adjusted for age and gender.

Self-reported systemic medical conditions and smoking OR 95% CI P value*
ANEMIA 0.750 (0.679–0.828) <.001
BLEEDING_DISORDERS 0.706 (0.640–0.779) <.001
LYMPHOMA 1.868 (1.331–2.621) .009
BLOOD_HEMOTOLOGICAL_ DISORDERS 1.241 (1.108–1.390) .006
LEUKEMIA 1.571 (0.926–2.666) >.99
MULTIPLE_MYELOMA 1.183 (0.313–4.466) >.99
MALIGNANT 0.835 (0.796–0.876) <.001
ANGINA 0.899 (0.777–1.041) >.99
CARDIOVASCULAR_HEART_ PROBLEM 1.033 (0.998–1.069) >.99
CONGENITAL_HEART_DISEASE 1.656 (1.325–2.071) <.001
CORONARY_HEART_DISEASE 1.253 (1.087–1.444) .050
HISTORY_OF_ENDOCARDITIS 0.808 (0.571–1.144) >.99
HEART_ATTACK 0.974 (0.869–1.091) >.99
HIGH_BLOOD_PRESSURE 1.166 (1.129–1.204) <.001
IMPLANT_DEFIBRILLATOR 0.905 (0.829–0.988) .550
RHEUMATIC_FEVER 1.478 (1.069–2.045) .399
SMOKING 1.359 (1.305–1.414) <.001
COCAINE_USE 0.939 (0.790–1.116) >.99
HEROIN_USE 2.255 (1.081–4.706) .605
MARIJUANA_USE 1.655 (1.517–1.805) <.001
METHAMPHETAMINE_USE 2.891 (2.089–4.001) <.001
ANOREXIA 0.541 (0.420–0.696) <.001
BULIMIA 0.571 (0.379–0.862) .192
ANDRENAL_GLAND_DISORDER 1.245 (0.781–1.984) >.99
DIABETES 1.211 (1.157–1.267) <.001
THYROID_PROBLEMS 0.894 (0.846–0.944) .002
GLAUCOMA 1.145 (1.068–1.227) .004
AIDS 0.701 (0.377–1.304) >.99
HIV 1.040 (0.861–1.257) >.99
STD 0.969 (0.835–1.125) >.99
DIALYSIS 1.926 (1.510–2.458) <.001
KIDNEY 0.863 (0.817–0.912) <.001
RENAL_FAILURE_OR_ INSUFFICIENCY 1.085 (0.952–1.238) >.99
ARTHRITIS 0.973 (0.935–1.012) >.99
LUPUS 0.969 (0.759–1.237) >.99
OSTEOPOROSIS 0.822 (0.763–0.885) <.001
DEMENTIA 0.562 (0.454–0.696) <.001
ANXIETY 0.713 (0.670–0.758) <.001
DEPRESSION 0.673 (0.642–0.706) <.001
PARKINSON_DISEASE 0.809 (0.603–1.086) >.99
MULTIPLE_SCLEROSIS 0.761 (0.555–1.042) >.99
SEIZURE_OR_EPILEPSY 1.259 (1.098–1.444) .028
STROKE 0.871 (0.779–0.974) .357
ORGAN_TRANSPLANT 0.956 (0.770–1.188) >.99
ASTHMA 0.668 (0.634–0.703) <.001
BRONCHITIS 1.548 (1.425–1.682) <.001
CHRONIC_BRONCHITIS_OR_ EMPHYSEMA 0.660 (0.621–0.701) <.001
RESPIRATORY_OR_LUNG_ PROBLEM 1.119 (1.022–1.225) .357
SINUSITIS 1.144 (1.059–1.235) .017
SLEEP_APNEA 1.123 (1.041–1.211) .073
CHRONS_DISEASE 1.128 (0.842–1.512) >.99
TUBERCULOSIS 1.224 (1.111–1.348) .001
CIRRHOSIS_OR_CHRONIC_ HEPATITIS 1.969 (1.776–2.182) <.001
GASTRO_INTESTINAL_ DISORDERS 1.297 (1.185–1.419) <.001
HEPATITIS 1.258 (1.171–1.350) <.001

Multivariable regression models were explored adjusting for the effects of age and gender. Holm method is used to adjust P values for multiple comparison.

Discussion

The importance of the oral-systemic connection has been highlighted in recent years. Especially during the COVID-19 pandemic, it has been demonstrated that oral health is of paramount importance for the maintenance of systemic health.17 The results of the present investigation indicated that patients with anaemia, bleeding disorders, cardiovascular diseases, heart attack, high blood pressure, implanted defibrillator, smoking, cocaine use, marijuana use, methamphetamine use, diabetes, kidney disease, renal failure, arthritis, lupus, depression, stroke, asthma, and chronic bronchitis exhibited a significantly higher number of missing teeth. In regards to periodontitis, individuals reported lymphoma, blood haematologic disorders, congenital heart disease, high blood pressure, smoking, marijuana use, methamphetamine use, diabetes, glaucoma, dialysis, seizure or epilepsy, bronchitis, sinusitis, tuberculosis, gastrointestinal disorders, and hepatitis exhibited significantly higher odds of having periodontitis (P < .05).

The relationship between periodontitis and other pathologic systemic conditions has been suggested in the literature, but the biological connection between periodontal disease and systemic conditions is still unknown. A number of theories have been proposed to explain these associations including bacteraemia, low-grade systemic inflammation, and increased myelopoietic activity. As periodontitis is characterised by the presence of periodontal pathogens in the oral cavity, bacteria or activated lymphocytes may disseminate to different tissues and may lead to inflammatory and functional complications that initiate comorbidities.4 Periodontitis is also associated with bacteraemia and systemic inflammation, and it may induce acute response as well as metabolic and inflammatory alterations in the liver and bone marrow, which can connect different chronic inflammatory diseases.4 Expression of virulence factors produced by periodontopathogens and the presence of pathogens in non-oral tissues may support the biological relationship between chronic oral diseases such as periodontal disease and systemic diseases.18 Moreover, individuals with severe periodontitis demonstrate elevated levels of pro-inflammatory mediators as well as increased neutrophil counts in the blood.4 Therefore, the plausible connection between systemic health and periodontal health is evident.

In this investigation, environmental factors including smoking, marijuana use, and methamphetamine use were associated with periodontitis as well as a higher number of missing teeth. Smoking affects all components of the inflammatory response, both the innate and immune host response, and neutrophils in smokers have shown decreased chemotaxis, phagocytosis, and adherence.19 A higher prevalence of severe periodontal disease and increased tooth loss have been associated with tobacco use.20,21 Periodontal disease and tooth loss are also more prevalent amongst people who use drugs due to a number of reasons including poor nutrition, oral hygiene, and limited access to dental care facilities.22 This study adds to the limited current knowledge regarding the effect of drugs on periodontal status and tooth loss.

Diabetes was also significantly associated with periodontitis and the number of missing teeth in the present investigation. This is in agreement with previous studies that have shown the positive bidirectional association between periodontal disease and diabetes mellitus.23,24 Both conditions are driven by inflammatory processes, which may explain their association.25 Diagnoses of moderate-severe and severe periodontitis have been associated with hypertension, whilst periodontal treatment leads to improvement in hypertensive and prehypertensive individuals.26,27 In addition, a systematic review of the literature showed that individuals with tooth loss exhibit a higher risk for hypertension and that hypertensive individuals have a higher risk of tooth loss.28 This suggests a bidirectional association between tooth loss and hypertension. In the present study, older individuals and males were more likely to have periodontitis, which is in agreement with the updated prevalence of periodontitis in adults in the US that reported an 8.9% prevalence of severe periodontal disease and a positive significant correlation between age and male gender.29

It is of paramount importance to exercise caution in interpreting the data and analysis due to the limitations of the study. This is a retrospective study that has evaluated electronic health records, and its design may inherently lead to flaws. Prospective longitudinal studies are required to establish cause-and-effect relationships amongst periodontitis, tooth loss, and systemic conditions. In the present investigation, patient self-reported data were utilised, rather than medical records, which may exhibit limitations due to bias in patient recall, untruthful responses as a result of social desirability, and a patient's lack of knowledge.30 However, it has been documented that self-reported measures are accurate for chronic conditions and routine screening exams and may also provide valuable information for broad measures of population prevalence.31

A strength of this investigation was the use of data from a large record database (BigMouth) that has in-depth information of patients’ dental and medical histories and are derived from a variety of institutions and providers. Pooling datasets from different sources provides a greater picture of types of patients. It may facilitate the investigation of conditions that are not very prevalent and can lead to a better understanding of their effect on oral diseases including periodontitis and tooth loss. Many systemic diseases that are not often reported in the periodontal literature such as tuberculosis, gastrointestinal disorders, bronchitis, multiple sclerosis, sexually transmitted diseases, drug use, and lymphoma are analysed in this study.32 A number of studies have demonstrated an association between systemic diseases and periodontitis.33 The present investigation has added new candidates in the oral-systemic connections that need to be further explored in prospective longitudinal studies. In addition, the present study investigates the association of systemic conditions with periodontal diseases and tooth loss separately, and many of the results are confirmed with the 2 methodologies. With the inclusion of more than 100,000 dental records, this is one of the largest cohorts analysed in the history of dental research and may guide new research towards mapping connections between periodontitis and systemic conditions.

Conclusions

Within the limitations of this retrospective study, the association of a number of systemic conditions with periodontitis and tooth loss was identified. Patients with anaemia, bleeding disorders, cardiovascular diseases, heart attack, high blood pressure, implanted defibrillator, smoking, cocaine use, marijuana use, methamphetamine use, diabetes, kidney disease, renal failure, arthritis, lupus, depression, stroke, asthma, and chronic bronchitis exhibited a significantly higher number of missing teeth. Individuals reporting lymphoma, blood haematologic disorders, congenital heart disease, high blood pressure, smoking, marijuana use, methamphetamine use, diabetes, glaucoma, dialysis, seizure or epilepsy, bronchitis, sinusitis, tuberculosis, gastrointestinal disorders, and hepatitis exhibited significantly higher odds of having periodontitis. Future studies should investigate further the potential causative relationships amongst these conditions, tooth loss, and periodontitis.

Conflict of Interest

None disclosed.

Acknowledgments

Acknowledgements

Data for this research were obtained from the BigMouth Dental Data Repository. The authors would like to thank the Consortium for Oral Health Research and Informatics clinical research committee. Research reported in this publication was supported by the National Center for Advancing Translational Sciences of the National Institutes of Health Award Number UL1-TR002494. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. This research was further supported by a University of Minnesota School of Dentistry, Division of Periodontology grant (L.F.W).

Author contributions

Authors' contributions: GSC and LFW conceived the study. GSC, ZJ, NM, and LFW designed the study. GSC completed the data collection. ZJ and NM analysed the data. GSC wrote the paper. GSC, ZJ, NM, and LFW reviewed and edited the manuscript. All authors read and approved the final manuscript.

Funding

Research reported in this publication was supported by the National Center for Advancing Translational Sciences of the National Institutes of Health Award Number UL1-TR002494.

Footnotes

Supplementary material associated with this article can be found in the online version at doi:10.1016/j.identj.2023.08.002.

Appendix. Supplementary materials

mmc1.docx (24.3KB, docx)

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