Department of Oral Surgery and Implantology, Johann Wolfgang Goethe-University, Carolinum, Frankfurt, Germany.
Department of Orthodontics, Universitätsklinikum Düsseldorf, Düsseldorf, Germany.
Clin Implant Dent Relat Res. 2020 Oct;22(5):647-653. doi: 10.1111/cid.12947. Epub 2020 Sep 2.
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.
通过使用不同处理条件的自体牙根（TR）和二期种植体植入，对垂直牙槽嵴增加后的骨微观结构进行体积评估。
在 4 只比格犬的上颌前磨牙双侧被拔出并随机分配到高压灭菌（TR-A）或无额外处理（TR-C）组。随后，TR 被用作双侧下颌象限垂直牙槽嵴增加的块状移植物。在 12 周时，钛种植体被植入并愈合 3 周。微计算机断层扫描用于分别在种植体的颊侧（v）和舌侧（o）以及增加的种植体上半部分定量组织体积（BV/TV）、骨小梁厚度（Tb.Th）和骨小梁间距（Tb.Sp）。
中位数 BV/TV [TR-C：51.33%（v）和 70.42%（o）与 TR-A：44.05%（v）和 64.46%（o）]、Tb.th [TR-C：0.22 mm（v）和 0.27 mm（o）与 TR-A：0.23 mm（v）和 0.29 mm（o）]和 Tb.Sp [TR-C：0.26 mm（v）和 0.13 mm（o）与 TR-A：0.29 μm（v）和 0.15 mm（o）]在两组之间相似。
TR-C 和 TR-A 移植物在移植物区域内均具有相似的骨微观结构。
