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.

Massimiliano Negri,Guido M. Macaluso,Andrea Toffoli,Carlo Galli,Arianna Smerieri,Mauro Bonanini,Edoardo Manfredi,Giulia Ghiacci,Simone Lumetti

doi:10.1155/2014/369051

Massimiliano Negri, Guido M. Macaluso + Show 7 more

Open Access

https://doi.org/10.1155/2014/369051

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Abstract

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 (P < 0.007). A relation between implant diameter and MBL (P < 0.0001) was observed in male and, more limitedly, female patients. Older patients had higher MBL in the maxilla, but not in the mandible (P < 0.0001). MBL progressively increased with age in male patients, but reached a peak already in the 50–60 years age group in the female subset (P < 0.001). 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.

Highlights

Stability of peri-implant tissues is considered crucial when evaluating dental implant outcomes [1, 2] and it is measured by clinical and radiologic parameters
Marginal bone loss (MBL) is one of the most important of them because bone around implants is necessary for mechanical stability and plays a key role in esthetic outcomes as well [3] as the presence of adequate levels of bone around implants directly affects soft tissues and, as direct consequence, esthetics and hygienic maintenance
A recent review [8] found that few implant systems have any published data about marginal bone loss (MBL) and concluded that this piece of information should be available in the scientific literature for all dental implant systems on the market

Summary

Introduction

Stability of peri-implant tissues is considered crucial when evaluating dental implant outcomes [1, 2] and it is measured by clinical and radiologic parameters. Marginal bone loss (MBL) is one of the most important of them because bone around implants is necessary for mechanical stability and plays a key role in esthetic outcomes as well [3] as the presence of adequate levels of bone around implants directly affects soft tissues and, as direct consequence, esthetics and hygienic maintenance. Marketing strategies often employ implant performance data derived from studies on implant designs that have been discontinued or modified throughout the years. As a matter of fact, most of the dental implant systems used worldwide do not provide adequate outcome data, and this is apparent when long term results are sought

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