Microbial accumulation on different suture materials following oral surgery: a randomized controlled study

BackgroundThe aim of the study was to compare bacterial accumulation on different suture materials following oral surgery.MethodsPatients scheduled for implant or periodontal surgery were included in the study. Upon flap closure, four different sutures were placed in a randomized sequencesilk, coated polyglactin, nylon, and polyester. Ten days following surgery, the sutures were removed and incubated in aerobic as well as anaerobic conditions for 7days and colony-forming units (CFUs) were calculated. Association between bacterial accumulation and periodontal diagnosis, type of surgery, and antibiotic treatment were also tested.ResultsAll sutures in all patients were found to contain bacteria. Overall, nylon sutures showed significantly lower CFU levels compared to silk, coated polyglactin, and polyester sutures. The type of surgery (implant vs. periodontal surgery) did not significantly influence bacterial accumulation. Also, periodontal diagnosis had little impact on CFU counts. Interestingly, post-surgical antibiotic treatment also had only a minor effect on bacterial accumulation on the various sutures.DiscussionThe results indicate that the monofilamentous nylon sutures showed less microbial accumulation than the other tested materials that were all braided. This effect may be due to material qualities as well as suture macrostructure. Type of surgery, periodontal diagnosis, and antibiotic consumption have little effect on bacterial accumulation of sutures.Clinical relevanceThe study provides the microbial profile of commonly used sutures and may assist in suture selection during clinical procedures.