Risk Factors Associated With Peri-Implant Marginal Bone Loss Among Japanese Patients Receiving Supportive Periodontal...

Area of Science:

• Dental Implantology
• Periodontology
• Prosthodontics

Background:

• Peri-implant marginal bone loss (MBL) is a critical concern in long-term dental implant success.
• Supportive periodontal therapy (SPT) is crucial for maintaining peri-implant health.
• Identifying factors associated with MBL is essential for improving patient outcomes.

Purpose of the Study:

• To investigate patient-related and prosthetic factors associated with MBL in patients undergoing SPT.
• To identify risk factors for marginal bone loss around dental implants.

Main Methods:

• Retrospective cohort study of 192 patients with 600 implants followed for over 10 years.
• MBL assessed via standardized radiographs at baseline and long-term follow-up.
• Analysis of patient factors (diabetes, periodontitis history, KMW) and prosthetic factors (fixation type, EA).

Main Results:

• History of diabetes mellitus and periodontitis were significantly associated with MBL.
• Prosthetic factors including cement-retained prosthesis, mandibular location, and emergence angle (EA) ≥ 30° showed significant associations with MBL.
• Insufficient keratinized mucosa width (KMW) < 2 mm was also linked to increased MBL.

Conclusions:

• Patient history of diabetes and periodontitis are significant risk factors for MBL.
• Specific prosthetic characteristics, such as cement-retained restorations and unfavorable emergence angles, contribute to MBL.
• Maintaining adequate keratinized mucosa width is important for peri-implant bone stability.