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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

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Published on: February 10, 2014

Marginal Bone Level Changes in Implant-Supported Fixed Prostheses in a Retrospective Study: A Multifactorial

Wilawan Chaiyaporn¹, Teerawut Tangsathian¹, Kakanang Supanimitkul¹

¹Department of Periodontology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.

Clinical Implant Dentistry and Related Research

|January 9, 2026

Summary

Key factors influencing marginal bone loss around dental implants include deep probing depths, lack of keratinized mucosa, and implant abutment microgaps. A history of periodontitis also increases the risk of bone loss around implant-supported prostheses.

Keywords:

association bone level dental implants factors fixed prostheses

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Last Updated: Jan 13, 2026

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Area of Science:

Dental Implantology
Periodontology
Prosthodontics

Background:

Peri-implant bone loss is a significant concern in the long-term success of dental implant-supported fixed prostheses.
Understanding the multifactorial nature of marginal bone level changes is crucial for effective management.

Purpose of the Study:

To identify site-related, implant characteristic-related, prosthetic, and patient-related factors associated with marginal bone level around dental implant-supported fixed prostheses.

Main Methods:

A cross-sectional study analyzed clinical and radiographic data from 196 subjects with 404 implants.
Multivariate multilevel logistic regression assessed factors associated with marginal bone level (≥2mm vs. <2mm).

Main Results:

Deep probing depth (≥6mm), absence of keratinized mucosa, implant abutment microgap presence, transmucosal height (<2mm), and a history of periodontitis were significantly associated with higher risk of marginal bone loss (≥2mm).

Conclusions:

Marginal bone level is influenced by probing depth, keratinized mucosa, transmucosal height, microgap, and periodontitis history.
Comprehensive peri-implant assessment and well-designed prostheses are essential.
Patients with periodontitis require strict maintenance programs.