Oral Health in the Era of Substance Exposure: A Systematic Review of Clinical Deterioration, Biomarker Insights, and Intervention Efficacy
M. Nayana, M. Y. Jayachandra, G. Kavya, Harish Kumar, S. Sowmya, Bharath Sekhar NayanarAbstract
Background:
Poor oral health is a major consequence of substance misuse, mainly smoking, which plays a leading role in the development of various oral health problems such as periodontal disease, tooth loss, peri-implant complications, and oral potentially malignant disorders.
Objective:
The objective of this study was to comprehensively evaluate the clinical outcomes and intervention methods for oral health among substance-using populations, in particular focusing on the effects of tobacco, alcohol, and other substances.
Methods:
A systematic literature search following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines was conducted in PubMed, Scopus, Web of Science, and Cochrane Library for the period 1989–2026. This search yielded 687 records. Screening the records and assessing their eligibility resulted in a final inclusion of 31 studies. Randomized controlled trials were evaluated using the Cochrane risk of bias 2.0 tool, and observational studies were assessed by the Newcastle–Ottawa Scale. Data were synthesized narratively, and meta-analysis was undertaken in cases where data were sufficiently homogenous.
Results:
Substance use has been very often linked to negative periodontal consequences, worsened response to treatment, and increased levels of inflammatory markers. Some additional treatments (low-dose doxycycline, photodynamic therapy resveratrol synbiotics, simvastatin) were shown to cause significant changes in probing pocket depth and clinical attachment level. Besides that, smoking cessation interventions such as dental-office counseling, quitline programs, and digital platforms have raised quit rates and helped keep periodontal stability. Observational studies show that crack cocaine use is connected to more tooth loss and that combined tobacco and alcohol exposure increases the risk of erythroplakia.
Conclusion:
Quitting smoking as well as the use of adjunctive therapies can enhance the periodontal outcomes in the populations using substances. Continued exposure though results in worse outcomes, and that means it is vital that concerted clinical and public health interventions be carried out.