Objectives. The goal of this study was to evaluate bone changes around endosseous implants in partially edentulous patients.\nMaterials and Methods. A total of 632 two-stage implants were placed in 252 patients. The implants had straight emergence profile,\nZirTi surface, 3.3 to 5mm diameter, and 8.5 to 13mm length. Bone levels were assessed on orthopantomography immediately after\nsurgery and after 36 months and marginal bone loss (MBL) was calculated from their difference. Results. Cumulative survival rate\nwas 98.73%. Overall MBL was 0.8mm Ã?± 0.03 (mean Ã?± SEM). Higher MBL was observed around implants in the maxilla than in\nthe mandible (???? < 0.007). A relation between implant diameter and MBL (P < 0.0001) was observed in male and, more limitedly,\nfemale patients. Older patients had higher MBL in the maxilla, but not in the mandible (P < 0.0001). MBL progressively increased\nwith age in male patients, but reached a peak already in the 50ââ?¬â??60 years age group in the female subset (P < 0.001). Conclusions.\nThe overall MBL is consistent with the available literature. Site difference and patient age and gender appear to significantly affect\nMBL, representing important factors to be considered during implant placement.
Loading....