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Quintessence Int 51 (2020), No. 2     17. Jan. 2020
Quintessence Int 51 (2020), No. 2  (17.01.2020)

Page 118-126, doi:10.3290/j.qi.a43864, PubMed:31942573


Effects of implant-related variables on the marginal bone loss around dental implants
Dereci, Ömür / Mumcu, Emre / Dereci, Olgu Nur / Dayan, Süleyman Çağatay / Koşar, Yasin Çağlar / Fadhil, Sadeq Mohammed Taqi
Objective: Marginal bone loss (MBL), a prognostic parameter for implant success, is associated with implant- and patient-related variables. The purpose of this study was to analyze the effects of the crown-to-implant ratio and independent factors of implant diameter, implant length, implant type, location, and platform switching on distal and mesial MBLs at the 6-, 12-, 24-, and 36-month recall sessions of single crown implant-supported restorations.
Method and materials: Radiographic and clinical data of patients treated with single crown implants were collected. MBL was measured at the baseline and recall sessions on panoramic radiographs. The crown-to-implant ratio was calculated by dividing the length of the crown by that of the dental implant.
Results: The crown-to-implant ratio had a moderately positive correlation with distal MBL at the 6-month recall session (P < .05, r = 0.469) and a weakly positive correlation at the 12- (P < .05, r = 0.220), 24- (P < .05, r = 0.214), and 36- (P < .05, r = 0.250) month recall sessions. Distal and mesial MBL did not significantly differ among the four implant types at any recall session (P > .05). The crown-to-implant ratio had no significant correlation with mesial MBL at the 12-, 24-, or 36-month recall session (P > .05), and a moderately positive correlation at the 6-month recall session (P < .001, r = 0.434).
Conclusions: MBL was similar among different implant types in the short and medium terms. There was a positive correlation between distal MBL and the crown-to-implant ratio.

Keywords: alveolar bone loss, bone resorption, dental implants, implant-supported dental prosthesis, single-tooth dental implants