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Five Degree Internal Conical Connection and Marginal Bone Stability around Subcrestal Implants: A Retrospective
Diego Lops1, Michele Stocchero2, Jason Motta Jones3
1Department of Prosthodontics, Dental Clinic, School of Dentistry, University of Milan, 20142 Milan, Italy.
Materials (Basel, Switzerland)
|July 17, 2020
Summary
Subcrestally placed implants with internal conical connections and platform switching demonstrated stable marginal bone levels over two years. Implant position and type-2 diabetes influenced bone changes.
Area of Science:
- Dental Implantology
- Periodontology
- Biomaterials Science
Background:
- Limited data exists on subcrestal implant placement effects on marginal bone.
- Investigating the connection between subcrestal implants and abutments is crucial for bone level stability.
Purpose of the Study:
- To evaluate marginal bone levels around subcrestally placed implants with internal conical connections.
- To assess the long-term stability of bone around these specific implant types.
Main Methods:
- Retrospective study of patients with subcrestal implants (2012-2018).
- Utilized internal 5° conical connection with platform switching.
- Measured radiographic marginal bone level (MBL) at prosthesis delivery and follow-up.
Main Results:
- Mean follow-up of 2.72 years for 410 implants in 93 patients.
- Mean MBL change was 0.09 mm, indicating stable bone levels.
- Implant vertical position, follow-up year, and type-2 diabetes influenced MBL.
Conclusions:
- Subcrestal implants with platform switching and conical connections maintain stable bone levels long-term.
- Further research needed on the mechanism of tight internal conical connections.
- Implant positioning and diabetes are key factors for MBL stability.
