Abstract
Background and aims: The mouth's microflora may alter as a result of dental implants. The purpose of this study was to examine the composition of aerobic bacteria in patients with dental implants and those who had natural teeth (without implants) as well as the response of those bacteria to antibiotic treatment. Methods: Bacteriological tests were performed on 72 patients (36 dental implants and 36 natural teeth) who visited dental clinics run by Sana'a University's Faculty of Dentistry and private dental clinics. Antibiotic susceptibility tests and culture trials were carried out at the National Center for Public Health Laboratories (NCPHL) in Sana'a, Yemen. Swabs were taken from the mucous membrane of the palate and the dorsum of the tongue from both groups, and cultured on selective and non-selective solid medium, in addition to culturing the swabs on medium enriched with 5% blood, then all cultured plates were incubated to microaerophilic conditions (5% CO2) and oxygenated in 37oC for 48 hours. Then bacterial growth was identified by standard methods. Results: In implant patients, the rate of bacterial isolates from the palate and tongue was slightly higher for potentially harmful bacteria such as E. coli (8.3% in tongue implant patients vs. 2.8% in non-implant patients) and Pseudomonas aeruginosa (5.6% versus 0%). While in viridians Streptococcus including S. mutans, there was a higher colonization rate in implants patients (83.3% in the palate verses, 75% in the palate of individuals without implants). A low level of oxacillin resistance (5.1%) in S. mutans isolates but S. mutans had a substantial level of tetracycline resistance (55.93%), 11.9% for co-trimoxazole, 10.2% for erythromycin, and just 1.7% for clindamycin. Conclusion: The study found that pathogenic bacteria like E. coli and Pseudomonas aeruginosa were isolated from the palate and the back of the tongue swabs at a slightly elevated rate in implant patients; also colonization rates of Streptococcus viridians, including S. mutans, were higher in implant patients compared to those without implants. There was a significant levels of antibiotics resistance in S. aureus, CoNs and S. viridians oral isolates in both groups of tested individuals. Peer Review History: Received: 14 June 2023; Revised: 13 July; Accepted: 17 August, Available online: 15 September 2023 Academic Editor: Dr. A.A. Mgbahurike, University of Port Harcourt, Nigeria, amaka_mgbahurike@yahoo.com Received file: Reviewer's Comments: Average Peer review marks at initial stage: 6.0/10 Average Peer review marks at publication stage: 8.0/10 Reviewers: Dr. Rola Jadallah, Arab American University, Palestine, rola@aauj.edu Dr. Bilge Ahsen KARA, Ankara Gazi Mustafa Kemal Hospital, Turkey, ahsndkyc@gmail.com
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