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Early crestal bone loss around implants placed at previously failed sites compared with initially integrated
Se-Lim Oh1, Harlan J Shiau1, Izoh Ashour2
1Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland, USA.
Clinical Implant Dentistry and Related Research
|March 23, 2022
Summary
Dental implants placed at failed sites show similar crestal bone loss (CBL) to pristine implants once integrated. Replacing failed implants does not significantly impact long-term bone levels.
Area of Science:
- Dental Implantology
- Periodontology
- Biomaterials Science
Background:
- Limited data exists on early crestal bone loss (CBL) around dental implants placed in previously failed implant sites.
- Understanding bone remodeling around replaced implants is crucial for long-term success.
Purpose of the Study:
- To compare crestal bone loss (CBL) in replaced implants (RIs) versus pristine implants (PIs) within the same patients.
- To evaluate CBL from implant placement up to 17 months post-restoration delivery.
Main Methods:
- Retrospective cohort study involving 22 subjects with both RIs and PIs.
- Data collected included demographics, implant location, failure type, bone grafting, and serial radiographs.
- Blinded evaluation of crestal bone levels at placement, restoration, and follow-up.
Main Results:
- No significant difference in mesial and mean crestal bone levels between RI and PI groups.
- Replaced implants showed lower distal crestal bone levels, but this was attributed to initial bone levels, not replacement.
- Bone graft procedures were 4.6 times more likely for RIs.
Conclusions:
- Replacing dental implants at failed sites does not significantly affect crestal bone loss.
- Integrated replaced implants demonstrate a similar pattern of CBL to pristine implants.
