Studying the Implications of Antibiotic Resistance in Dental Infections

Abstract

Background: Antibiotic resistance poses a growing challenge to the effective management of dental infections. Inappropriate prescribing practices and prior antimicrobial exposure contribute to the emergence of resistant microorganisms, complicating treatment outcomes. This study investigates the implications of antibiotic resistance in dental infections by evaluating bacterial resistance patterns, prescribing behaviors, and associated clinical outcomes.

Methods: A descriptive cross-sectional study was conducted involving 160 adult patients with diagnosed dental infections and 60 dental practitioners who prescribe antibiotics. Data were collected using structured questionnaires, clinical assessment forms, and microbiological laboratory reports. Clinical specimens from infected sites were cultured, and antibiotic susceptibility testing was performed against commonly prescribed dental antibiotics. Statistical analysis assessed associations between prior antibiotic use, resistance patterns, and clinical outcomes.

Results: Periapical abscesses (32.5%) were the most common infection. Streptococcus viridans (30.6%) and Staphylococcus aureus (23.1%) were the predominant isolates. Resistance rates were highest for penicillin (57.5%), amoxicillin (46.3%), and erythromycin (42.5%); the lowest resistance was observed for amoxicillin-clavulanic acid (11.9%). Amoxicillin was the most frequently prescribed antibiotic (40.0%). Prior antibiotic use within six months (64.4% of patients) was significantly associated with resistant isolates (76.7% vs. 36.8%, p < 0.001). Among resistant infections (n=100), delayed healing (41.0%) and recurrent infection (28.0%) were common, with 12.0% requiring hospital referral. While 91.7% of practitioners recognized resistance as a major concern, only 43.3% had received formal training on rational antibiotic use.

Conclusion: Antibiotic resistance is highly prevalent among microorganisms isolated from dental infections, particularly against first-line agents like penicillin and amoxicillin. Prior antibiotic exposure is a significant predictor of resistance. Gaps in antimicrobial stewardship training and inappropriate prescribing practices contribute to adverse clinical outcomes, including delayed healing and treatment failure. Strengthening evidence-based prescribing, antimicrobial stewardship programs, and professional education is urgently needed to preserve antibiotic effectiveness in dental practice.