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A 5-year prospective study on small diameter screw-shaped oral implants
M B Comfort1, F C S Chu, J Chai
1Faculty of Dentistry, University of Hong Kong, Hong Kong.
Journal of Oral Rehabilitation
|April 22, 2005
Summary
Narrow platform (NP) dental implants offer a solution for limited alveolar ridges. A 5-year study found these 3.3 mm diameter implants achieved a 96% success rate, demonstrating reliable clinical performance.
Area of Science:
- Dental Implantology
- Periodontology
- Prosthodontics
Background:
- Limited alveolar ridge dimensions can restrict the use of standard dental implants.
- Narrow platform (NP) implants (3.3 mm diameter) are available for such cases.
- Assessing the long-term clinical efficacy of NP implants is crucial for patient selection.
Purpose of the Study:
- To evaluate the 5-year clinical performance of 3.3 mm diameter narrow platform (NP) dental implants.
- To determine the success rate and marginal bone loss associated with NP implants over a 5-year period.
Main Methods:
- Twenty-three machined screw-shaped NP implants were placed in nine patients.
- Clinical and radiographic examinations were conducted annually for 5 years.
- Success was assessed based on marginal bone loss, prosthesis function, and absence of complications.
Main Results:
- One implant failed during abutment connection, resulting in a 96% overall success rate.
- Mean marginal alveolar bone loss was 0.41 mm in the first year and 0.03 mm annually thereafter.
- The remaining 22 implants were successfully restored and maintained function.
Conclusions:
- Narrow platform (NP) implants demonstrate high clinical success rates (96%) over 5 years.
- These implants are a viable option for patients with limited alveolar bone dimensions.
- Minimal marginal bone loss indicates favorable long-term stability for NP implants.