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BioMed Research International
Volume 2014, Article ID 369051, 7 pages
Clinical Study

The Effect of Age, Gender, and Insertion Site on Marginal Bone Loss around Endosseous Implants: Results from a 3-Year Trial with Premium Implant System

1Private Practice, 29121 Piacenza, Italy
2SBiBiT, Centro di Odontoiatria, Università degli Studi di Parma, Via Gramsci 14, 43126 Parma, Italy

Received 14 April 2014; Revised 11 June 2014; Accepted 9 July 2014; Published 12 August 2014

Academic Editor: Konstantinos Michalakis

Copyright © 2014 Massimiliano Negri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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