Abstract
Aim: The aim of the present study was to evaluate the microbial contamination in internal and external walls of cone morse implant walls. Methods: Eleven patients with edentulous mandibular posterior area were selected to received dental implants, divided into groups: submerged (S), non-submerged (NS), and immediately loaded (IL). Microbiological evaluations (microorganisms’ number, aerobic and anaerobic colony forming units (CFU) number and microorganisms’ qualification) were divided into internal and external collection of the implant walls, at different stages: T0 (surgical procedure), T2 (suture removal), T4 (reopening S group), T6 (suture removal S group), and T8 (abutment placement in S and NS). All data were submitted to statistical analyses, with confidence level of 0.05. Results: There was difference in number of microorganisms observed over time within the same group (p < 0.05). A difference was observed in CFU when evaluated within the same group over time (p < 0.05), except for the IL group. In internal collection, a predominance of non-formation of microorganisms was observed at T0 in all groups, while formation of Gram-positive Diplococci and Gram-positive Bacilli was observed at T8 (p>0.05). In external collection, an increase in number of microorganisms was observed at T0. Conclusion: There was no difference in microbial contamination among the evaluated groups. The microorganism’s colonization changed over time.
Highlights
Dental implants are currently a safe and predictable reality for patients that wish to rehabilitate their oral health[1]
A predominance of non-formation of microorganisms was observed at T0 in all groups, while formation of Gram-positive Diplococci and Gram-positive Bacilli was observed at T8 (p>0.05)
It is possible to observe that there was a statistically significant difference in the number of microorganisms when the same group was assessed over time (p < 0.05)
Summary
Dental implants are currently a safe and predictable reality for patients that wish to rehabilitate their oral health[1]. There are two surgical protocols for dental implants insertion: one-stage surgery or non-submerged implants; two-stage surgery or submerged implants. The implant is placed so that the soft tissue flap remains around the coronal portion of the implant body or healing abutment. In the second surgical technique, the implant is placed at or below the alveolar crest level and the soft tissue is closed around the implant. After a suitable period, a second procedure is performed to expose the implant platform and install a healing or a final abutment[2]. During the initial phase of osseointegration, most implant systems recommend that the implant remain submerged[3,4,5]
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