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Crestal Bone Level Around Tissue-Level Implants Restored with Platform Matching and Bone-Level Implants Restored with
The International Journal of Oral & Maxillofacial Implants
|March 14, 2018
Summary
Bone-level implants with platform switching showed significantly less marginal bone loss compared to tissue-level implants with platform matching over five years. Both implant types demonstrated high survival rates in posterior regions.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Radiology
Background:
- Peri-implant bone loss is a critical factor affecting dental implant longevity.
- Tissue-level implants with platform matching and bone-level implants with platform switching represent distinct prosthetic designs.
- Understanding their long-term radiographic outcomes is essential for clinical decision-making.
Purpose of the Study:
- To compare radiographic marginal bone level (MBL) changes over five years between tissue-level implants (platform matching) and bone-level implants (platform switching) in posterior edentulous regions.
- To evaluate the differences in peri-implant bone crest levels between these two implant designs.
Main Methods:
- A 5-year randomized clinical trial involving 100 partially edentulous subjects (202 implants total).
- Implants were categorized into a control group (tissue-level, platform matching) and a test group (bone-level, platform switching).
- Periapical radiographs were taken at baseline, 1 year, and 5 years post-restoration to assess MBL changes.
Main Results:
- Bone-level implants with platform switching exhibited significantly less marginal bone loss compared to tissue-level implants with platform matching at all measured intervals (P < .001).
- Mean MBL changes from baseline to 5 years were 0.61 ± 0.73 mm for tissue-level implants and -0.20 ± 0.75 mm for bone-level implants.
- Both implant systems demonstrated comparable and high survival rates (98% for tissue-level, 96.1% for bone-level).
Conclusions:
- Bone-level implants restored with platform switching show superior marginal bone preservation compared to tissue-level implants with platform matching over a 5-year period.
- While both systems have high survival rates, platform switching in bone-level implants appears to mitigate peri-implant bone crest reduction.
- The statistically significant difference in MBL highlights the importance of implant design in long-term radiographic stability.
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