| 1614 Effects of Intracrevicular Restoration Margins on Peri-implant Health: Clinical, Biochemical, and Microbiologic Findings Around Esthetic Implants up to 9 Years | ||
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C. GIANNOPOULOU1, J.-P. BERNARD1, D. BUSER2, A. CARREL1, and U.C. BELSER1, 1 University of Geneva, Switzerland, 2 University of Bern, School of Dental Medicine, Switzerland Objectives: The aim of the present study was to evaluate longitudinally the stability of a cohort of esthetic implants that had been in function for at least 1 year prior to the baseline examination. Methods: Sixty-one maxillary anterior ITI implants in 45 systemically healthy patients, supporting single crown restorations, were randomly selected and examined. Clinical, microbiologic and biochemical parameters were recorded at baseline and again after 3 years. Clinical examination included plaque index, gingival index, bleeding on probing, pocket probing depth (PPD), distance between implant shoulder and mucosal margin (DIM) and mobility. Dark field microscopy and immunofluorescence were used to evaluate the bacteria morphotypes and the presence of five specific pathogenic bacteria, respectively. Peri-implant crevicular fluid (PICF) was collected at the mesial and distal sites of each implant and total amounts of three biochemical markers were assessed : alkaline phosphatase (ALPase) was measured by using p-nitrophenyl-phosphate as substrate, elastase activity (EA) by the use of a low molecular-weight fluorogenic substrate and the inhibitor a2-macroglobulin (a2M) by ELISA. Results: Results revealed that the only statistically significant differences between baseline and follow-up examination concerned PPD and DIM measurements, which slightly increased. The remainder of the clinical measurements and almost all of the microbiologic and biochemical parameters did not significantly change. Furthermore, no associations were observed between the above results and the number of years that implants had been in function. Conclusions: Based on an observation period of 4 to 9 years (mean : 6.8 years at the time of the follow-up examination), it can be concluded that in patients with appropriate oral hygiene, the intracrevicular position of the restoration margin does not appear to adversely affect peri-implant health and stability. | ||
| Seq #170 - Human Implant Studies 11:00 AM-12:15 PM, Friday, 27 June 2003 Svenska Massan Exhibition Hall B | ||
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