IADR Abstract Archives
Early Crestal Bone Loss around Implants Placed at Failed Sites
Objectives: The purpose of this study was to evaluate changes in crestal bone loss (CBL) around retreated implants (RI group) from the time of implant placement to 19 months post-delivery of definitive restoration compared to initially integrated and restored implants (pristine implants; PI group).
Methods: This is an ongoing study conducted under the approved IRB protocol (HP-00085667). The following data were retrieved from patients who had both retreated implant(s) and pristine implant(s): patient demographic information, implant site location, types of implant failure(s), bone graft procedures for implants, and radiographs at implant placement, healing abutment connection, restoration delivery and the first follow-up (19±10 months). A blind evaluator (CC) measured CBL after evaluator calibration (ICC=0.96). Changes in CBL between the RI and the PI group were compared using the two-way ANOVA.
Results: 22 implants (11 in the RI and 11 in the PI group) from 4 males and 6 females were reviewed. Among the 10 subjects, 2 subjects were diabetic and 2 subjects were smokers. The 22 implants were located at the maxillary anterior (4), the maxillary posterior (11) and the mandibular posterior (7) lesion. The 11 implants in the RI group were placed either at early failure (8) or late failure (3) sites. Bone grafts were performed for 7 implants in the RI and 7 implants in the PI group; these procedures were performed mostly at implant placement (5 implants in the PI and 6 implants in the RI group). While time significantly affected CBL both at the mesial and the distal side, the RI group exhibited significantly more CBL than the PI group at the distal side (F=6.763, p<0.0001).
Conclusions: Overall, retreated implants exhibited greater CBL than pristine implants during the period from the time of implant placement to 19 months in function.
Methods: This is an ongoing study conducted under the approved IRB protocol (HP-00085667). The following data were retrieved from patients who had both retreated implant(s) and pristine implant(s): patient demographic information, implant site location, types of implant failure(s), bone graft procedures for implants, and radiographs at implant placement, healing abutment connection, restoration delivery and the first follow-up (19±10 months). A blind evaluator (CC) measured CBL after evaluator calibration (ICC=0.96). Changes in CBL between the RI and the PI group were compared using the two-way ANOVA.
Results: 22 implants (11 in the RI and 11 in the PI group) from 4 males and 6 females were reviewed. Among the 10 subjects, 2 subjects were diabetic and 2 subjects were smokers. The 22 implants were located at the maxillary anterior (4), the maxillary posterior (11) and the mandibular posterior (7) lesion. The 11 implants in the RI group were placed either at early failure (8) or late failure (3) sites. Bone grafts were performed for 7 implants in the RI and 7 implants in the PI group; these procedures were performed mostly at implant placement (5 implants in the PI and 6 implants in the RI group). While time significantly affected CBL both at the mesial and the distal side, the RI group exhibited significantly more CBL than the PI group at the distal side (F=6.763, p<0.0001).
Conclusions: Overall, retreated implants exhibited greater CBL than pristine implants during the period from the time of implant placement to 19 months in function.
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