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One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study.
José Vicente Ríos-Santos1, Gregorio Tello-González1, Pedro Lázaro-Calvo1
1Advanced Periodontics, Facultad de Odontología, Universidad de Sevilla, C/Avicena S/N, 41009 Seville, Spain.
International Journal of Environmental Research and Public Health
|December 22, 2020
Summary
The "One Abutment-One Time" approach did not reduce peri-implant bone loss compared to repeated abutment removal. However, higher abutments were associated with less bone loss, indicating abutment height is a significant factor in dental implant outcomes.
Area of Science:
- Dental Implantology
- Periodontology
- Biomaterials Science
Background:
- Peri-implant bone loss is a critical concern in dental implant success.
- The
- One Abutment-One Time
- (OAOT) protocol aims to minimize surgical trauma and bacterial contamination.
- Conventional techniques involve multiple abutment disconnections during crown fabrication.
Purpose of the Study:
- To compare peri-implant bone levels and implant stability between the OAOT (definitive abutment placement at surgery) and conventional (healing abutment with multiple removals) protocols.
- To evaluate the influence of abutment height (1 mm vs. 2 mm) on bone level changes and implant stability.
Main Methods:
- A randomized controlled trial involving 147 patients undergoing dental implant placement.
- Patients were allocated to either the definitive abutment (DEF) or healing abutment (HEA) group.
- Periapical radiographs assessed bone levels at baseline, 6, and 12 months; implant stability was measured using resonance frequency analysis (RFA).
Main Results:
- No statistically significant difference in bone loss was observed between the DEF and HEA groups after 12 months (0.36 ± 0.79 mm vs. 0.48 ± 0.71 mm).
- Bone loss was significantly influenced by time, with differences noted between baseline and 6/12 months, but not between groups.
- A statistically significant reduction in bone loss was observed with 2 mm abutments compared to 1 mm abutments (0.41 ± 0.70 mm vs. 0.45 ± 0.78 mm).
- Implant stability showed no significant differences between the groups.
Conclusions:
- The OAOT protocol does not offer a significant advantage in preventing peri-implant bone loss compared to the conventional technique involving abutment disconnections.
- Abutment height plays a role in peri-implant bone remodeling, with taller abutments potentially leading to less bone loss.
- Further research may be warranted to elucidate the mechanisms behind abutment height's influence on bone levels.
Keywords:
connection and disconnection abutmentdental implantsimplant bone lossimplant collarimplant neckimplant-abutment connectionsmarginal bone levelMore Related Videos
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