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Abstract
To volumetrically assess the bone microstructure following vertical alveolar ridge augmentation using differently conditioned autogenous tooth roots (TR) and second-stage implant placement. The upper premolars were bilaterally extracted in n = 4 beagle dogs and randomly assigned to either autoclavation (TR-A) or no additional treatment (TR-C). Subsequently, TR were used as block grafts for vertical alveolar ridge augmentation in both lower quadrants. At 12 weeks, titanium implants were inserted and left to heal 3 weeks. Microcomputed tomography was used to quantify bone volume per tissue volume (BV/TV), trabecular thickness (Tb.Th), and trabecular spacing (Tb.Sp) at vestibular (v) and oral (o) aspects along the implant and in the augmented upper half of the implant, respectively. Median BV/TV [TR-C: 51.33% (v) and 70.42% (o) vs TR-A: 44.05% (v) and 64.46% (o)], Tb.th [TR-C: 0.22 mm (v) and 0.27 mm (o) vs TR-A: 0.23 mm (v) and 0.29 mm (o)] and Tb.Sp [TR-C: 0.26 mm (v) and 0.13 mm (o) vs TR-A: 0.29 μm (v) and 0.15 mm (o)] values were comparable in both groups. Both TR-C and TR-A grafts were associated with a comparable bone microstructure within the grafted area.
Highlights
Vertical alveolar ridge augmentation is considered to be an effective treatment approach for the rehabilitation of bone deficiencies in both partially and fully edentulous patients.[1]
The present analysis aimed at volumetrically assessing the bone microstructure following vertical alveolar ridge augmentation using differently conditioned tooth roots (TR)'s and second-stage implant placement in a standardized canine model
It was observed that both to either autoclavation (TR-A) and TR grafts were still detectable (TR-C) groups were associated with comparable median bone volume per tissue volume (BV/TV) [TR-C: 51.33% (v) and 70.42% (o) vs TR-A: 44.05% (v) and 64.46% (o)], Tb.Th [TR-C: 0.22 mm (v) and 0.27 mm (o) vs TR-A: 0.23 mm (v) and 0.29 mm (o)] and Tb.Sp [TR-C: 0.26 mm (v) and 0.13 mm (o) vs TR-A: 0.29 μm (v) and 0.15 mm (o)] values, respectively
Summary
Vertical alveolar ridge augmentation is considered to be an effective treatment approach for the rehabilitation of bone deficiencies in both partially and fully edentulous patients.[1] Autogenous bone (AB) blocks were frequently used for this specific indication and reported to result in a weighted mean vertical bone gain of 4.12 mm.[1] These outcomes, were associated with high complication rates (ie, 23%), mainly resulting in premature graft exposures.[1] it was recommended to perform implant placement in a staged approach.[2]. The present study aimed at volumetrically assessing the bone microstructure following vertical alveolar ridge augmentation using differently conditioned TR's and second-stage implant placement in a standardized canine model
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