Comparison of autogenous tooth bone graft and synthetic bone graft materials used for bone resorption around implants after crestal approach sinus lifting: a retrospective study
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Purpose: This retrospective study compares the amount of bone resorption around implantsbetween an autogenous tooth bone graft (AutoBT) and a synthetic bone graft after a boneaddedcrestally approached sinus lift with simultaneous implant placements. Methods: In all, 37 patients participated in this study. Seventeen patients were grouped asgroup I and underwent an AutoBT-added sinus lift using the crestal approach. The remaining20 patients were grouped as group II and underwent synthetic bone grafting. Both groupsreceived the implant placements simultaneously. Of the 37 participating patients, only 22patients were included in the final results: Eleven patients of group I and 11 patients ofgroup II. Before the surgery, the distance from the alveolar crest to the sinus floor was measuredusing panoramic radiography. After the surgery, the distance was measured again fromthe neck of the implant thread to the most superior border of the added graft materials. Then, the amount of sinus lift was calculated by comparing the two panoramic radiographs. After a year, a panoramic radiograph was taken to calculate the resorption of the bone graftmaterial from the radiograph that was taken after the surgery. The significance of the resorptionamount between the two types of graft materials was statistically analyzed. Results: The bone height was increased to an average of 4.89 mm in group I and 6.22 mm ingroup II. The analysis of panoramic radiographs 1 year after the surgery showed an averagebone resorption of 0.76 mm and 0.53 mm, respectively. However, the degree of lifting(P=0.460) and the amount of bone-grafted material resorption (P=0.570) showed no statisticallysignificant difference. Conclusions: Based on this limited study, AutoBT can be considered a good alternative bonegraft to a synthetic bone graft in a bone-added sinus lift, when extraction is necessary priorto the surgery.
Abstract
Purpose: This retrospective study compares the amount of bone resorption around implantsbetween an autogenous tooth bone graft (AutoBT) and a synthetic bone graft after a boneaddedcrestally approached sinus lift with simultaneous implant placements. Methods: In all, 37 patients participated in this study. Seventeen patients were grouped asgroup I and underwent an AutoBT-added sinus lift using the crestal approach. The remaining20 patients were grouped as group II and underwent synthetic bone grafting. Both groupsreceived the implant placements simultaneously. Of the 37 participating patients, only 22patients were included in the final results: Eleven patients of group I and 11 patients ofgroup II. Before the surgery, the distance from the alveolar crest to the sinus floor was measuredusing panoramic radiography. After the surgery, the distance was measured again fromthe neck of the implant thread to the most superior border of the added graft materials. Then, the amount of sinus lift was calculated by comparing the two panoramic radiographs. After a year, a panoramic radiograph was taken to calculate the resorption of the bone graftmaterial from the radiograph that was taken after the surgery. The significance of the resorptionamount between the two types of graft materials was statistically analyzed. Results: The bone height was increased to an average of 4.89 mm in group I and 6.22 mm ingroup II. The analysis of panoramic radiographs 1 year after the surgery showed an averagebone resorption of 0.76 mm and 0.53 mm, respectively. However, the degree of lifting(P=0.460) and the amount of bone-grafted material resorption (P=0.570) showed no statisticallysignificant difference. Conclusions: Based on this limited study, AutoBT can be considered a good alternative bonegraft to a synthetic bone graft in a bone-added sinus lift, when extraction is necessary priorto the surgery.
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