Abstract
Background:
Traumatic dental injuries (TDIs) often compromise the dentin-pulp complex, necessitating innovative therapeutic approaches. Stem cell therapy has emerged as a promising solution for regenerative endodontics.
Objective:
This research investigates the application of stem cell therapy in regenerating dentin for patients with TDIs by using a retrospective analysis of clinical outcomes.
Methods:
A retrospective data analysis was performed on 120 cases involving TDIs treated with stem cell-based interventions. Key parameters included patient demographics, clinical outcomes, and histological findings. Statistical significance was assessed using a P value of <0.05.
Results:
Significant improvement in dentin regeneration was observed in 85% of cases treated with stem cell therapy. Histological findings confirmed the formation of tubular dentin in 75% of cases. Younger patients exhibited superior outcomes compared to older cohorts.
Conclusion:
Stem cell therapy demonstrates significant potential for regenerating dentin in TDIs. Future studies should explore long-term outcomes and optimization of protocols.
KEYWORDS: Clinical outcomes, dentin regeneration, regenerative endodontics, stem cell therapy, traumatic dental injuries
INTRODUCTION
Traumatic dental injuries (TDIs) are a prevalent global issue, affecting individuals across various age groups. These injuries often lead to complex structural and functional impairments of the dentin-pulp complex, posing significant challenges for restorative treatments. Traditional approaches, such as direct pulp capping or root canal therapy, provide symptomatic relief but lack regenerative capabilities.[1]
Recent advancements in regenerative medicine have introduced stem cell therapy as a novel intervention for dental tissue repair. By leveraging the inherent differentiation potential of stem cells, researchers aim to stimulate dentinogenesis, restoring the physiological structure and function of injured teeth.[2] However, clinical adoption remains limited due to variability in outcomes, procedural complexity, and ethical concerns surrounding stem cell sourcing.[3,4] This research aims to evaluate the efficacy and outcomes of stem cell therapy in regenerating dentin among patients with TDIs, emphasizing data-driven insights to guide future applications.
MATERIALS AND METHODS
Research design and population
A retrospective cohort research was conducted, analyzing patient records from a tertiary dental care center between 2015 and 2022. A total of 120 patients aged 10–50 years with diagnosed TDIs treated with stem cell therapy were included. Patients with systemic conditions or incomplete treatment records were excluded.
Intervention protocol
Stem cells were harvested from autologous dental pulp tissue and expanded in vitro. Following appropriate processing, the cells were transplanted into the injured tooth under sterile conditions. A scaffold matrix composed of hydrogel and growth factors was used to support cell attachment and differentiation.
Outcome measures
Primary outcomes included the following:
Radiographic evidence of dentin formation.
Histological confirmation of tubular dentin.
Clinical assessments of pain relief and functional restoration.
Statistical analysis
Data were analyzed using SPSS software (version 25.0). Descriptive statistics summarized demographic and clinical data. The Chi-square test was used to assess categorical variables, while t-tests were used to compare mean differences. Significance was set at P < 0.05.
RESULTS
The demographic analysis of the research population revealed that the mean age of patients was 25.4 years, with a standard deviation of ±8.2, indicating a predominantly young cohort. Male patients constituted 58% of the sample, reflecting a slightly higher prevalence of TDIs among males. A significant majority of the affected teeth (75%) were anterior teeth, which aligns with the increased vulnerability of these teeth to trauma. This demographic profile highlights the need for tailored interventions for younger populations and underscores the susceptibility of anterior teeth to injury due to their anatomical positioning [Table 1].
Table 1.
Demographic and clinical characteristics
| Parameter | Value |
|---|---|
| Age (mean±SD) | 25.4±8.2 years |
| Gender (Male:Female) | 58%:42% |
| Affected teeth | Anterior (75%) |
The clinical outcomes demonstrate the efficacy of stem cell therapy in dentin regeneration among patients with TDIs. Radiographic evidence showed dentin formation in 85% of cases, signifying a high success rate of the therapy. Furthermore, histological findings confirmed the formation of tubular dentin in 75% of the treated cases, indicating that the regenerated dentin closely mimicked the natural structure. Additionally, 90% of patients reported significant pain relief and functional restoration within 3 months post-treatment, underscoring the clinical and symptomatic benefits of the therapy. These findings validate the potential of stem cell-based approaches as a viable option for restoring dental tissues in traumatic injuries [Table 2].
Table 2.
Clinical outcomes
| Outcome | Percentage of cases |
|---|---|
| Radiographic dentin formation | 85% |
| Tubular dentin formation | 75% |
| Pain relief and function | 90% |
DISCUSSION
The research underscores the potential of stem cell therapy in regenerating dentin for TDIs, addressing both structural and functional deficits. The findings are supported by a growing body of literature highlighting the significance of innovative regenerative approaches in dentistry.
Clinical impact of dental trauma
Dental trauma significantly affects oral health-related quality of life, as highlighted by Verma et al.[1] The psychological, functional, and aesthetic challenges associated with such injuries necessitate advanced therapeutic options. This research corroborates the relevance of regenerative strategies, such as stem cell therapy, in mitigating these challenges by providing not only symptom relief but also structural restoration.
Mechanisms of regeneration
Stem cells derived from dental pulp exhibit remarkable plasticity and the ability to differentiate into odontoblast-like cells.[2] Darvishi et al.[2] demonstrated the capability of dental pulp stem cells to differentiate into complex cellular structures, paving the way for functional tissue regeneration. The formation of tubular dentin observed in current research aligns with these findings, suggesting that stem cell therapy effectively replicates natural dentinogenesis processes.
Innovations in regenerative strategies
Emerging advancements, such as three-dimensional cell sheet layering, have enhanced the efficacy of tissue regeneration, as highlighted by Yan et al.[5] Current research complements this research by employing scaffolds enriched with growth factors, which improve cell differentiation and integration into the dentin-pulp complex. Moreover, recent literature suggests that functional pulp regeneration is crucial for long-term success, as described by Xie et al.[3,6]
Challenges and future directions
Despite promising outcomes, challenges remain in standardizing protocols and ensuring widespread clinical adoption. High costs, technical complexity, and limited long-term data are significant barriers. Additionally, ethical concerns surrounding the sourcing of stem cells need to be addressed, as suggested by Sugiaman et al.[7] Future research should focus on developing cost-effective solutions, exploring alternative sources such as stem cells from human exfoliated deciduous teeth, and validating these findings through multicenter randomized trials.[7,8]
Role of biomaterials in enhancing outcomes
Biomaterials play a pivotal role in supporting stem cell-based therapies. Rodríguez-Lorenzo et al.[9] emphasized the significance of scaffolds in facilitating tissue integration. The hydrogel matrices used in this research demonstrate the importance of biomaterial selection in optimizing clinical outcomes. Machla et al.[10,11] further highlighted the role of biomolecules in enhancing the regenerative potential of the dentin-pulp complex.
CONCLUSION
The convergence of stem cell research, biomaterials, and clinical advancements underscores the transformative potential of regenerative dentistry. However, as Almoharib et al. suggest, continuous innovation and collaborative research are critical to refining these therapies for broader clinical application. This research adds to the growing evidence supporting stem cell therapy as a viable option for dentin regeneration, paving the way for improved management of TDIs.
Conflicts of interest
There are no conflicts of interest.
Funding Statement
Nil.
REFERENCES
- 1.Verma SK, Jha AK, Prakash O, Ekram S, Tigga C, Noorani MK, et al. Impact of dental and orofacial trauma on oral health-related quality of life in adults: A systematic review. Chin J Traumatol. 2024;27:249–53. doi: 10.1016/j.cjtee.2023.05.003. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 2.Darvishi M, Hamidabadi HG, Bojnordi MN, Saeednia S, Zahiri M, Niapour A, et al. Differentiation of human dental pulp stem cells into functional motor neuron: In vitro and ex vivo study. Tissue Cell. 2021;72:101542. doi: 10.1016/j.tice.2021.101542. [DOI] [PubMed] [Google Scholar]
- 3.Xie Z, Shen Z, Zhan P, Yang J, Huang Q, Huang S, et al. Functional dental pulp regeneration: Basic research and clinical translation. Int J Mol Sci. 2021;22:8991. doi: 10.3390/ijms22168991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 4.Ajay Sharma L, Sharma A, Dias GJ. Advances in regeneration of dental pulp--A literature review. J Investig Clin Dent. 2015;6:85–98. doi: 10.1111/jicd.12064. doi: 10.1111/jicd.12064. [DOI] [PubMed] [Google Scholar]
- 5.Yan H, Oshima M, Raju R, Raman S, Sekine K, Waskitho A, et al. Dentin-pulp complex tissue regeneration via three-dimensional cell sheet layering. Tissue Eng Part C Methods. 2021;27:559–70. doi: 10.1089/ten.TEC.2021.0171. [DOI] [PubMed] [Google Scholar]
- 6.Yan H, De Deus G, Kristoffersen IM, Wiig E, Reseland JE, Johnsen GF, et al. Regenerative endodontics by cell homing: A review of recent clinical trials. J Endod. 2023;49:4–17. doi: 10.1016/j.joen.2022.09.008. [DOI] [PubMed] [Google Scholar]
- 7.Sugiaman VK, Djuanda R, Pranata N, Naliani S, Demolsky WL, Jeffrey Tissue engineering with stem cell from human exfoliated deciduous teeth (SHED) and collagen matrix, regulated by growth factor in regenerating the dental pulp. Polymers (Basel) 2022;14:3712. doi: 10.3390/polym14183712. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 8.Shah P, Aghazadeh M, Rajasingh S, Dixon D, Jain V, Rajasingh J. Stem cells in regenerative dentistry: Current understanding and future directions. J Oral Biosci. 2024;66:288–99. doi: 10.1016/j.job.2024.02.006. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 9.Rodríguez-Lorenzo LM, Reyes-Ortega F, Griffith M. Editorial: Biomaterials used in tissue engineering for the restoration of ocular disorders. Front Pharmacol. 2024;15:1369505. doi: 10.3389/fphar.2024.1369505. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 10.Machla F, Angelopoulos I, Epple M, Chatzinikolaidou M, Bakopoulou A. Biomolecule-mediated therapeutics of the dentin-pulp complex: A systematic review. Biomolecules. 2022;12:285. doi: 10.3390/biom12020285. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 11.Almoharib BK, Alonazi RS, Alanazi MA, Alqubaysi HA, Alshammari AF, Alzuhair NA, et al. Innovative approaches in regenerative endodontics: A review of current literature. Int J Health Sci. 2022;6(S10):1684–700. [Google Scholar]