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Influence of Crestal Implant Position and a Smooth Collar on Marginal Bone Level: A 2-Year Retrospective Radiographic
Summary
Dental implant survival rates remain high, with marginal bone loss influenced by prosthesis type and machined collar position. Supracrestal placement minimizes bone loss, while sub-crestal placement leads to significant loss over two years.
Area of Science:
- Dental Implantology
- Periodontology
- Biomaterials Science
Background:
- Endosseous dental implants are widely used for tooth replacement.
- Assessing long-term outcomes, including marginal bone level (MBL) changes, is crucial for implant success.
- The influence of various factors on MBL requires continued investigation.
Purpose of the Study:
- To evaluate the survival rate and clinical outcomes of an endosseous implant system.
- To assess marginal bone level (MBL) changes up to two years postloading.
- To determine the impact of machined collar neck position on crestal bone level changes.
Main Methods:
- Retrospective study of 96 implants in 57 patients.
- Radiographic determination of MBL at 12-24 months postloading.
- Evaluation of factors including prosthesis type and machined collar position.
Main Results:
- Implant survival rate was 98.96% at 1 year.
- Significant MBL decrease observed between baseline and loading.
- Marginal bone loss was significantly associated with prosthesis type (greater for cemented) and sub-crestal machined collar position.
Conclusions:
- The implant system demonstrated high survival rates.
- Machined collar position (supracrestal vs. sub-crestal) significantly impacts MBL.
- Prosthesis type is a key factor influencing marginal bone loss around dental implants.
