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