Q8: What is the role of inflammation in the pathogenesis of periodontal diseases?
The human oral cavity has a significant and evolving load of microbial species. The interactions between the host and microbial communities determine the severity of the disease. Periodontal diseases are generally caused by the overgrowth of commensal organisms, but not by exogenous pathogens. The immune mechanisms constantly adapt to rapidly evolving microorganisms to preserve homeostasis to maintain the ecological balance of commensal organisms.[1,2]
The pathogenesis of periodontal diseases is mediated by the inflammatory response to bacteria in dental biofilms. Specific microorganisms are reported to be associated with the progressive forms of the disease. These microorganisms are also present in individuals with no evidence of disease progression. This may indicate that disease progression is not related to the presence of bacteria alone, but the net effect of the immune response and the inflammatory processes plays an important role in this process. Patient susceptibility depends on the regulation of immune–inflammatory mechanisms and is modified by environmental factors.[3,4]
Diagnosis of periodontal disease
Several classifications of periodontal diseases have been proposed, and the recent classification proposed by the European Federation of Periodontology and the American Academy of Periodontology jointly has adopted the identification of the disease process and its severity based on clinical features. Clinical features such as bleeding on probing (BOP) and changes in color, position, size, surface texture, and consistency of the gingival tissues are the strongest lines of evidence indicative of inflammation as the principal feature in the pathogenesis of periodontal diseases. These features increase in severity if left unattended and lead to further deterioration of the condition by causing destruction in the supporting periodontal structures.
Clinical presentation and correlation
The initial inflammation in the periodontal tissues is a state of physiological defense mechanism against microbial etiology.[5] All components of the immune system, such as inflammation, resolution, and healing, act in harmony to protect the periodontium. It is important to bear in mind that as the lesion progresses, the preceding pathways still function.[6,7]
Inflammatory responses in the periodontium
Inflammatory responses are induced by the subgingival microbiota (i.e., microbial virulence factors) and from the host immune–inflammatory response.
Microbial virulence factors
Bacterial virulence factors initiate and propagate inflammation. These include a potent leukotoxin, which can destroy host immune cells such as PMNs, fimbrial adhesins, LPS, capsule, collagenase, and trypsin-like enzymes.[1]
Host-derived inflammatory mediators
The excessive and dysregulated production of inflammatory mediators and destructive enzymes in response to subgingival plaque bacteria causes majority of tissue damage in periodontitis. Multiple host defense mechanisms, including neutrophil migration, complement activation and antibody production cytokines, host-derived chemokines, prostaglandins (PGs) and TNF-α, act together to eliminate the periodontal infection.[8]
Destruction of periodontal tissues
Destruction of the bone
The concentration of inflammatory mediators in the gingival tissues must be sufficient to activate the pathways that lead to bone resorption along with the penetration of inflammatory mediators to be within a critical distance of the alveolar bone.
It has been shown that when LPS is added to osteoclast precursor cultures containing osteoblasts and/or stromal cells, it can directly stimulate bone resorption.[8,9] Receptor activator of NF-KB ligand and osteoprotegerin are the key regulators of bone remodeling and are directly involved in the differentiation, activation, and survival of osteoclasts and osteoclast precursors.
Destruction of the extracellular matrix
There is significant evidence that collagenases, gelatinases, stromelysins, membrane-type MMPs, and other MMPs play an important role in the periodontal tissue destruction. MMPs are upregulated in the periodontal inflammation. The main function of MMP-8 is the degradation of interstitial collagens.[10]
Recommendation
Chronic periodontitis is an inflammatory disease that can cause a state of insulin resistance and in turn can affect the glycemic status of the individual.
Q9: What is the epidemiological burden and financial burden of periodontal disease globally and in India?
There has been substantial improvement in the oral health of populations globally. Certain communities worldwide, particularly among underprivileged groups in developed and developing countries, still face oral health issues. Periodontal diseases have historically been considered the most important global oral health burden. The recent Global Burden of Disease Study, 1990–2010 indicates the following: (i) the overall prevalence of severe periodontitis is 11.2%, with approximately 743 million people affected, making periodontitis the sixth most prevalent disease worldwide, and (ii) from 1990 to 2010, there was an increase in the global burden of periodontal diseases by 57.3%.[11,12,13,14]
Different sections of the population are disproportionally affected by periodontal disease. Evidence has suggested an inverse relationship between periodontal disease and income. Low-income individuals have 1.8 times increased odds of severe periodontal disease as compared to high-income individuals.[15] Different age groups have different prevalence and severity of periodontal diseases, and the severity of the disease increases with advancing age. Although it is known that the prevention of periodontal disease is possible, the treatment of periodontal disease is usually sought when the extent and severity of disease increase because its early stages are usually asymptomatic.[16,17]
Periodontal disease burden
Certain landmark studies were performed to assess the prevalence rate of periodontitis in different geographical regions of India.[18,19,20] They found an average greater prevalence in older age groups above 40 years of age.
According to the National Oral Health Survey aided by the Dental Council of India, New Delhi, during 2002–2003, a three-stage sampling design was adopted to select 210 rural and 110 urban subjects in each of the age groups, viz., 5, 12, 15, 35–44, and 65–74 years, from each homogeneous region, comprising a number of districts of each state, and on the basis of geographical factors used by the Planning Commission. The community periodontal index was used for disease assessment, and the prevalence reported was 57%, 67.7%, 89.6%, and 79.9% in the age groups of 12, 15, 35–44, and 65–74 years, respectively.[21,22] The overall prevalence of periodontitis increases with age, disproportionately affects vulnerable segments of the population, and is a source of social inequality.
Systemic health and financial burden due to periodontal disease
Substantial evidence also shows that there could be systemic effects of periodontitis, which could be attributed to the hematogenous dissemination of both bacteria and bacterial products originating in the oral biofilms and inflammatory mediators originating in the inflamed periodontium. Through these mechanisms, periodontitis can cause various systemic diseases including diabetes, atherosclerosis, rheumatoid arthritis, and pulmonary infections. Periodontal attachment loss and bone loss due to severe periodontitis result in tooth loss, which, in turn, can lead to loss of masticatory function. Loss of masticatory function affects nutrition as subjects with masticatory dysfunction experience changes in their dietary habits, usually incorporating more starch and fats and less fresh fruit and vegetables in their diet.
Global perspective
Considering the number of treatment options, it is equally important to render cost-effective therapies. The estimated national expenditure for periodontal diseases in the United States of America almost doubled from 1997 to 2006. The estimated national expenditures for periodontal disease exceeded the expenditure for any one of the five most expensive medical conditions.[23] The disease burden needs to be further reduced, and there is also a need for new and more cost-effective prevention and treatment strategies that result in sustained oral health with minimal reliance on patient compliance and regular access to professional dental care.
Indian perspective
The scenario in India is no different. Although no sufficient evidence is available to date, the financial burden with regard to periodontal diseases in India is extensive. India is a developing country, and the awareness and the attitude of the patients toward oral health play an important role in the economy of dental fraternity. Lack of awareness, ignorance of initial symptoms, and the cost involved in the treatment refrain patients from seeking immediate attention to oral disease. Particularly, for patients with periodontitis having systemic complications, such as diabetes, they rather tend to ignore oral health owing to increased expenses. To deal with this situation, cost-effective therapies should be introduced, and dental insurances should be made mandatory for the working class. It would rather be useful in rendering effective oral therapy and controlling systemic implications.
Recommendations
The overall global burden of periodontal disease should be considered when treating patients with DM
The correspondence between physicians and dentists should be contemplated, as the prevalence rate of periodontal disease is higher among patients with diabetes, as it can influence the progression of periodontal disease severity. Both diseases increase the epidemiological and financial burden
Delayed treatment of periodontal disease can cause loss of teeth and increase the financial burden of the patient, as replacement therapy may be costlier
Cost-effective and timely supportive periodontal therapy can help in dealing with the national and global financial burden.
Q10: What are the main clinical entities, their signs and symptoms, and diagnostic criteria for periodontal diseases?
Periodontal diseases are a group of diseases that affect the periodontium. Periodontium comprises supporting tissues of the tooth and includes the gingiva, cementum, alveolar bone, and periodontal ligament. Gingiva is defined as the oral mucosa that surrounds the tooth in a collar-like pattern. The gingival sulcus is a shallow sulcus that is approximately 2–3 mm in depth. Another portion of the gingiva is firmly attached to the alveolar bone and provides a firm area for buffering during mastication and brushing. It varies between 1 and 9 mm. In health, the gingiva looks coral pink in color with varying degrees of pigmentation and has a firm and resilient attached gingiva. The alveolar bone follows the cementoenamel junction (CEJ) and, on average, lies 2 mm apical to the CEJ in health.
Absence of BOP, erythema and edema, patient symptoms, and attachment and bone loss define gingival health in the intact periodontium. Normal bone levels range from 1.0 to 3.0 mm apical to the CEJ.[24]
The diagnosis of periodontal diseases requires a mouth mirror, University of North Carolina-15 (UNC-15) periodontal probe, and a sound technique for probing the gingival sulcus.
Periodontal diseases are broadly classified into three categories: gingival diseases and conditions, periodontitis, and other conditions affecting the periodontium.[25]
Gingival disease can be plaque induced or nonplaque induced. The basic difference lies in the etiology. The primary etiology of plaque-induced gingivitis is the local deposits of biofilm, whereas the nondental plaque-induced gingival conditions comprise a group of conditions that are not plaque induced and may be manifestations of a systemic disease or may be localized to the oral cavity (e.g., bacterial, viral, or fungal origin). Plaque removal generally does not resolve these conditions.[24]
Gingivitis is an inflammation of the gingiva and does not involve the periodontal ligament and bone. The classical clinical signs of inflammation that manifest clinically in gingivitis are redness, BOP, swelling (observed as loss of knife-edged gingival margin and blunting of papillae). The patient may report symptoms of bleeding gums, metallic/altered taste, redness of swollen gums, bad breath, difficulty in eating, and pain.[24]
In gingivitis, the inflammation is localized to the gingival tissue, and there is no bone loss or clinical attachment loss (CAL); hence, radiographs will not be of any use to diagnose gingivitis.
Periodontitis is a chronic inflammatory disease associated with plaque biofilms and characterized by progressive destruction of the periodontal tissues. Loss of periodontal tissue results in CAL, alveolar bone loss, presence of periodontal pocketing, and gingival bleeding. Patients may experience recession, furcation involvement, and mobility. An interproximal CAL of ≥2 mm or ≥3 mm at two or more nonadjacent teeth can be used as the diagnostic criteria for periodontitis.[26]
The severity of periodontitis can generally be characterized as mild (CAL = 1–2 mm), moderate (CAL = 3–4 mm), and severe (CAL = >5 mm).
Loss of periodontal tissue results in CAL and alveolar bone loss and is a differentiating factor between gingivitis and periodontitis.
Recommendations
The dentist should have an appropriate armamentarium, especially a UNC-15 periodontal probe, for evaluating and diagnosing periodontal conditions
Knowledge of the clinical signs and symptoms of periodontal diseases and their differentiating features would be of great help to the dentist. The ISP guidelines for periodontal care would be useful for the practicing dentist for an overview
The differentiating feature between gingivitis and periodontitis is the presence of CAL in periodontitis cases.
Q11: What is the role of diabetes in light of new classification for periodontal diseases and has a more distinct role be considered as a risk factor for periodontal diseases and as a prognostic factor?
The new classification of periodontal disease characterizes the most common form of periodontitis, also termed as “periodontitis” (other two types being necrotizing periodontitis and periodontitis as a direct manifestation of systemic diseases), on the basis of staging and grading.[25]
Staging describes the severity of disease at presentation and includes an account of the extent and distribution of the disease and probable complexity of disease management.[26]
Grading is based on an analysis of the rate of periodontitis progression and evaluation of the risk for further progression. Recognized risk factors such as cigarette smoking or diabetes affect the rate of progression of periodontitis, help clinicians estimate the future course of the disease, and consequently, may play an important role in the transition from one stage to the next.[26]
Improved knowledge of risk factors affecting periodontitis has led to these risk factors being given such an importance in the classification itself. Diabetes status is one of the most important recognized factors, which defines the grading of periodontitis at the time of diagnosis along with the rate of bone loss.[26]
Glycemic levels have been included as “grade modifiers” in the classification. HbA1c <7.0% in patients will place the patients in Grade B, and HbA1c ≥7.0% in patients with diabetes puts the patients in Grade C at the time of diagnosis.[26]
A risk factor shifts the grade score to a higher grade, independent of the rate of progression. For example, a case of moderate CAL would be Stage II and a moderate progression rate would be graded as Grade B. The presence of poorly controlled type 2 diabetes in a patient can adversely affect the rate of progression and can shift the patient's disease grade to Grade C. Therefore, diabetes here acts as a risk factor that is able to shift the grade to rapid progression.[26]
Recommendations
Knowledge of the patient's glycemic status is important for the dentist to diagnose and determine the future course of disease progression. Management of periodontal patients would require modifications in the treatment plan, depending on the severity of both periodontitis and glycemic status.
Q12: How does untreated and treated periodontal disease affect quality of life?
Patients' health cannot merely be defined as the absence of disease but rather as a composite of physical, mental, emotional, and social well-being of an individual. The WHO has defined a patient's QoL as “perceptions of their position in life in the context of culture and value systems in which they live, and in relation to their goals, expectations, standards, and concerns.” QoL is a subjective perception and thus highly variable, which tends to change over time under the influence of changing health status, social, and environmental factors.[27]
Patient-oriented evidence that matters provides a more holistic measure of treatment goals than the disease-oriented evidence as it tends to miss out on patients' perspectives. In periodontal therapy, patient-based outcomes such as patient-perceived symptoms, function, satisfaction, and psychological comfort can differ significantly from the results obtained through clinical indicators, but studies measuring these parameters are limited.
Patient-related quality of life measures for untreated periodontitis
Functional limitations: decreased chewing capacity, tooth loss
Physical pain: associated with acute exacerbations, gingival swelling, temporomandibular dysfunction (as a result of tooth loss, pathologic migration)
Psychological discomfort: halitosis, pathologic migration, esthetics, and tooth loss.
The effect of OHRQoL has been explored less frequently for periodontitis than other oral conditions such as dental caries. A significant association in the presence of periodontitis between adults and young individuals with OHRQoL perceived by patients is observed in cross-sectional studies and assessed through systematic reviews.[28,29,30,31] The most commonly used instrument to measure OHRQoL in the studies related to periodontitis is the Oral Health Impact Profile 14.[32]
Significant differences were observed between healthy individuals and patients with periodontal disease in terms of OHRQoL measures, i.e., physical, psychological, social, and functional disabilities.[31,33] The severity of periodontal disease had a direct correlation with negative OHRQoL, with pocket depth >5 mm adversely affecting overall QoL.[31,34,35]
Periodontitis has a chronic asymptomatic course and is thus not perceived by patients unless the disease has progressed to an advanced stage. CAL is a gradual process, allowing patient's occlusion and musculature to adapt to the functional demands without the patient being aware of the change. Gingival swelling, sore gums, gingival recession, missing or drifting teeth, and oral malodor are the most common symptoms given by the patients for adverse OHRQoL.[23]
Undiagnosed and untreated periodontitis has a detrimental effect on masticatory function and is a significant factor associated with tooth loss in the adult population.[36] Tooth loss and tooth mobility lead to detrimental consequences such as temporomandibular disorders, changes in food consumption, and nutritional status.[37,38]
In addition, periodontal disease with coexisting systemic diseases such as cardiovascular disease or diabetes can confound the disease process, thereby exerting a greater impact on patients' QoL.[39]
A consistent association has been seen with periodontal therapy on the improvement of patient-perceived OHRQoL.[39,40] NSPT, irrespective of the type (manual, ultrasonic, quadrant vs. full mouth), has a positive effect on improving the QoL of patients.[39] This perception of the patients was found to be maintained even after 1 year of nonsurgical therapy.[41]
Recommendations
Patient-perceived QoL is the true measure of disease status, treatment requirements, and assessment of therapeutic outcomes
Periodontitis is an asymptomatic chronic disease. Regular dental checkups will prevent loss of function associated with advanced progression
A periodontal treatment plan should include treatment needs diagnosed by the clinician and patient-perceived requirements of esthetics, function, and social/psychological well-being
Adequate time should be provided for educating patients regarding the course of periodontitis, treatment goals, and effects of untreated disease burden
In the current era of medico-legal complications, after nonsurgical management of periodontitis, patients should be adequately explained regarding the need for surgical intervention and unperceivable changes that are required for long-term stability and maintenance of dentition.
Q13: What signs, symptoms, history, etc., would warrant a complete diagnostic workup for diabetes in an undiagnosed but suspected diabetes patient in a dental clinic?
Majority of the diabetes patients visiting dental clinics have type 2 diabetes (90%–95%)[42,43] and are usually asymptomatic. Since self-monitoring in India is lacking, diabetes is randomly discovered when the blood glucose levels are measured for some other problems, on the advice of a medical practitioner.
The patient's medical history provides important clues related to early signs and symptoms of diabetes. This may be an important diagnostic breakthrough for undiagnosed cases visiting dental clinics.
Classical symptoms of diabetes include:
Increased thirst (polydipsia)
Frequent micturition with a large amount of urine (polyuria)
Increased appetite (polyphagia).
A clinician should be cautious regarding prediabetes and suggest full diagnostic workup for diabetes if the patient profile has a combination of these factors:[44]
Predominantly in male patients
Age >45 years
Family history of diabetes
Sedentary lifestyle (physical activity <3 times a week)
Obesity with increased waist circumference
Increased body mass index (BMI)
Female patient: history of gestational diabetes or having delivered a child with >9 pounds (>4.82 kg) weight at the time of birth.
Patient history that should alert a dental practitioner for diagnostic workup:
Increased blood pressure (hypertension)
Sudden weight loss
Malaise
Weakness
Frequent bed-wetting episodes
Dryness of mouth
Drowsiness.
Symptoms related to diabetes-associated complications:
Blurry vision (retinopathy)
Numbness of the feet and hands (neuropathy)
Frequent cramps (neuropathy)
Irritability (neuropathy)
Swollen feet and puffiness under eyes (nephropathy)
Fatigue (cardiovascular disease)
Slow healing ulcers (delayed wound healing)
Frequent infections of gingival tissue/skin/vaginal infections (hyperglycemia).
Oral symptoms of diabetes are given below:
Dry mouth
Burning mouth
Dysgeusia (taste alteration)
Sticky mouth with bad breath.
Oral signs of diabetes are given below:
Severe periodontal destruction as seen through increased periodontal pocket depths, bone loss, and progressive attachment loss
Multiple acute periodontal abscesses
Suppuration from pockets
Increased sites with BOP after thorough Phase 1 therapy (>30%)
Candida-related oral lesions: angular cheilitis, median rhomboid glossitis, erythematous (denture-related) stomatitis
Tongue abnormalities: fissured tongue, bald tongue, geographic tongue (benign migratory glossitis)
Halitosis; typical fishy smell (ketone breath)
Dry socket
Oral lichen planus (OLP, more common in type 1 diabetes): pain/discomfort, burning sensation, and sensitivity to acidic foods.
The overall prevalence of diabetes is approximately 8% of the world's population. These data do not account for the increasing prevalence of diabetic sleeper cells in the population who have not been diagnosed.[45] It is estimated that 3%–4% of adult patients visiting dental clinics are unaware of their diabetic status. The prevalence of diabetes in the population is more for type 2 diabetes (90%–95%) than for type 1 diabetes (~5%); thus, the available evidence also focuses on type 2 diabetes.[42,43]
There is no evidence of acute effects of diabetes on oral complications. Most signs and symptoms, including oral complications, are representations of long-term effects and thus represent chronic manifestations. Strong evidence exists for the association between elevated BMI and waist circumference in DM. Elevated BMI-related obesity was found to be strongly associated with type 2 diabetes in females (pooled relative risk [RR]: 12.41; confidence interval [CI]: 9.03–17.06).[46]
There is evidence supporting a significant association through cross-sectional and few longitudinal studies between the presence of chronic hyperglycemia and severe periodontitis.[47] Both the prevalence and the incidence of periodontitis are increased in patients with type 2 and type 1 diabetes.[48,49] Diabetes has been shown to increase the risk of the incidence of periodontitis and its progression by 86% (RR: 1.86 [95% CI: 1.3–2.8]) through a meta-analysis of longitudinal prospective studies.[50]
Prediabetes shows a similar predisposition to increased prevalence, incidence, and severity of periodontitis. Support for the association of prediabetes to increased risk of periodontal health was reviewed through two longitudinal and mostly cross-sectional studies. Evidence is limited to certain subpopulations. Its generalization to other populations needs validation through properly conducted longitudinal studies with standardized case definitions for both prediabetes and periodontitis.[51]
There is clinical evidence regarding the association between periodontal abscesses and diabetes.[52] Clinical experience suggests that a single periodontal abscess may be associated with local factors, but multiple abscesses are manifestations of either diabetes or any other medically compromised state. A study on the Saudi Arabian population found that the prevalence of periodontal abscesses in patients with diabetes was 58.6%, and these patients showed HbA1c levels of ≥6.5%.[53]
There is emerging evidence for the presence of halitosis as an alerting signal toward diabetes. A typical fruity ketonic smell is associated with diabetes. Hyperglycemia causes increased oxidative stress, which leads to increased levels of fatty acids and methyl nitrate in the bloodstream, resulting in typical ketonic malodor.[54] Halitosis is also due to the release of volatile sulfur compounds by bacteria associated with tongue coating, periodontitis, and hyposalivation. The correlation between ketonic breath and blood glucose levels has the potential for a noninvasive diagnostic value.
Evidence suggests that patients with both type 1 and type 2 diabetes have taste alterations. In a case–control study, ageusia (loss of taste) was found in type 1 (3%) and type 2 (5%) diabetes and hypogeusia (reduced taste) in >33% of diabetes.[55] This alteration in taste is seen to be independent of neuropathic complications.[56]
Epidemiological studies indicate an increased prevalence of xerostomia and hyposalivation in patients with diabetes. Patients with diabetes often complain of polydipsia and dry and sticky mouth. However, evidence is indicative and not substantial enough to prove a direct correlation.[57]
Evidence related to the association between DM and Candida-related oral mucosal lesions is also limited, although epidemiologically increased prevalence is seen. Assessment of the association is not conclusive due to variations in lesion complexity, study populations, interactions with other risk factors, and lack of longitudinal studies. A probable reason for the concomitant occurrence may be related to the impaired immune response in diabetes, leading to opportunistic infection of Candida species. Evidence regarding non-Candida-related species is too limited to establish any association with diabetes.[47]
Common autoimmune disorder links OLP with type 1 diabetes. The triad of OLP, hypertension, and diabetes is known as Grinspan syndrome.[58] Evidence related to the association of burning mouth syndrome (BMS) with diabetes is limited due to an overlap between BMS and other diabetes-associated conditions such as xerostomia, taste alterations, Candida infections, and neuropathy.[59] OLP may be a manifestation of any of these conditions although studies have reported its increased prevalence in patients with diabetes.[60],[61]
There is a lack of clear correlation between the presence of dental caries and diabetes. The same etiological lifestyle factors such as increased carbohydrate intake may be a causal factor for both diseases.[47]
Recommendations
Diabetes is a chronic disease, and early diagnosis and proper referral have the potential to prevent adverse complications
Presence of oral signs of destructive periodontal disease with severity inconsistent in relation to local factors, suppuration, presence of multiple periodontal abscesses, tongue abnormalities, Candida-related lesions, halitosis, and persistent BOP after Phase 1 therapy are red flags for suspecting the presence of underlying systemic factors (diabetes)
Patient-reported symptoms of taste alteration, sticky and dry mouth, bad breath, and burning sensation in the oral mucosa should be correlated with oral signs and patient's medical history to obtain a holistic view of the patient's systemic condition
Screening prediabetes risk test is a useful tool that can be used for suspected diabetes patients visiting dental clinics
An inclusive, patient-oriented multidisciplinary treatment approach is the need of the hour, and a robust referral system should be developed between dental and medical teams.
Q14: Are there any compromised treatment goals for periodontal treatment in medically compromised patients. In other words, due to the underlying medical condition (other than diabetes), which may interfere with an idealistic treatment goal, is there an evidence for an acceptable compromised periodontal treatment goals?
Therapeutic end points are objective measurements of outcomes of periodontal therapy. Probing pocket depth reduction and gain in clinical attachment levels provide undisputed evidence toward successful therapy but are still considered as surrogate end points. True end points are measured in terms of retention of tooth in the oral cavity through longitudinal follow-up and the patient's QoL.[62]
The oral health goal set by the WHO is that the world population should retain at least 20 teeth throughout life.[63] Periodontal therapeutic goals are the attainment of clinical gingival health after treatment of active disease. Periodontal classification defines acceptable clinical gingival health following successful periodontal therapy in terms of the absence of gingival redness (erythema), swelling (edema), and BOP ((<10%) in reduced periodontium with probing pocket depth ≤3 mm.[24] The term “clinically healthy” should be used only for the absence of clinical inflammation on either intact periodontium or reduced periodontium. Definition or paradigm detailing a compromised state needs to be defined.[64],[65] Periodontal disease in medically compromised patients has a synergistic inflammatory response, creating additional treatment requirements. In patients with systemic diseases, the ideal treatment end points are thus compromised. The goal of treatment focuses on maintenance of the remaining teeth in the oral cavity without active periodontal disease.
Currently, no scientific evidence is available for compromised end point therapy. Restoration of diseased attachment or bone levels in periodontitis patients with systemic complications to the predisease level through any treatment modality is not possible. Therapeutic goals, therefore, shift toward the control of local and systemic disease risk factors, to minimize inflammation and to stabilize probing depths and clinical attachment levels.
Evidence suggests two treatment outcomes:[65]
Maintenance of periodontal stability
Periodontal disease control/remission.
Periodontal stability is a state in which local and systemic factors related to periodontitis are controlled, resulting in minimal BOP ((<10%), control of progressive periodontal destruction, and with pocket depth maintained at ≤4 mm.[64],[65] This state is an acceptable compromise as it results in minimal inflammation and control of modifiable risk factors, resulting in optimal treatment response.
In patients where control of predisposing or modifying factors is not possible, the therapeutic aim should be disease control/remission. Periodontal treatment results in reduction (not total resolution) of inflammation and shows slight improvement in probing depth reduction and attachment level gains. Stringent, more aggressive, and compliant supportive periodontal therapy is required for the maintenance of these cases. Dental practitioners should aim for this therapeutic goal in medically compromised patients with uncontrolled modifiable factors (diabetes, cardiovascular diseases, etc.). A residual pocket depth of ≥6 mm and BOP (≥30%) even after active periodontal therapy result in an increased risk of tooth loss.[66]
Recommendation
Periodontal therapy should aim to achieve clinical gingival health through active treatment and frequent periodontal maintenance
The true therapeutic end point for successful therapy is maintenance of at least 20 teeth in the oral cavity (WHO Health Goal) without active periodontal disease
Achievement of periodontal stability is an acceptable treatment outcome that would require a synergistic partnership of a dental practitioner in consultation with a medical counterpart on a compliant patient
In medically compromised states, active therapy and frequent periodontal maintenance should be able to achieve disease control/remission stage. It is to be remembered that this stage is very unstable and would require more aggressive and subjectively tailored recall programs
Systemic complications require a hand-in-hand approach between dentists and physicians as treatment goals and outcomes are inter-related. A robust referral system and inclusive treatment planning would allow for the achievement of periodontal stability with well-controlled systemic end points
The balance between medical and perceived periodontal treatment needs should be reached based on a comprehensive QoL assessment.
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