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Platform-switched restorations on wide-diameter implants: a 5-year clinical prospective study
1Department of Clinical Odontostomatology, University of Padua, Institute of Clinical Dentistry, Padua, Italy. paolovigolo@virgilio.it
Summary
External-hexagon implants with platform-switched components showed less marginal bone loss over five years compared to those with matching wide-diameter components. This finding is crucial for long-term dental implant success.
Area of Science:
- Dental Implantology
- Periodontology
- Biomaterials Science
Background:
- Crestal bone loss around dental implants is a common concern affecting long-term success.
- External-hexagon implants are widely used, but prosthetic component selection may influence bone levels.
- Understanding the impact of prosthetic components on bone resorption is vital for clinical decision-making.
Purpose of the Study:
- To compare 5-year crestal bone changes around external-hexagon wide-diameter implants.
- To evaluate differences between implants restored with matching wide-diameter versus platform-switched prosthetic components.
Main Methods:
- A 5-year clinical study included 182 external-hexagon wide-diameter implants (5-mm diameter) placed in posterior jaws.
- Implants were restored with either matching wide-diameter (Group A) or platform-switched (Group B) components.
- Marginal bone resorption was measured annually via intraoral radiographs.
Main Results:
- No implant failures were observed in either group.
- After 1 year, Group A showed mean bone resorption of 0.9 mm (SD 0.3 mm), while Group B showed 0.6 mm (SD 0.2 mm).
- No significant changes in bone resorption were noted in subsequent years (2-5).
Conclusions:
- Platform-switched prosthetic components resulted in statistically less marginal bone loss compared to matching wide-diameter components.
- This suggests platform switching may be beneficial for preserving crestal bone around external-hexagon implants.