Department of Periodontics, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois.
Department of Periodontology, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
J Oral Implantol. 2023 Jun 1;49(3):233-237. doi: 10.1563/aaid-joi-D-21-00218.
Sufficient bone volume is necessary for placing a dental implant in an ideal position. To restore severely insufficient bone volume, autogenous block graft procedures with various intraoral donor sites are presented in the literature. The aims of this retrospective study are to present the dimensions and volume of the potential ramus block graft site, and to evaluate possible effect of mandibular canal diameter and its position in relation to mandibular ramus block graft volume. Two-hundred cone-beam computed tomography (CBCT) images were evaluated. The maximum length, width, height, and volume of the potential ramus block graft site, mandibular canal diameter, mandibular canal-mandibular basis distance, and mandibular canal-crest distance were measured. Mandibular canal diameter, mandibular canal-crest distance, and mandibular canal-mandibular basis distance were 3.139 ± 0.446 mm, 15.376 ± 2.562, and 7.834 ± 1.285 mm, respectively. In addition, the dimensions of the potential ramus block graft sites were measured 11.156 ± 2.297 mm × 10.390 ± 3.420 mm × 8.816 ± 1.720 mm (height × length × width). Moreover, the potential ramus bone block volume was calculated as 1.076 ± 0.398 cm3. While a positive correlation was detected between mandibular canal-crest distance and the potential ramus block graft volume (r = .160, P = .025), a negative correlation was found between mandibular canal-mandibular basis distance and the potential ramus block graft volume (r = -.020, P = .001). Mandibular ramus is one of the predictable intraoral donor sites for bone augmentation procedures. However, ramus has some volumetric limitations related to its neighboring anatomic structures. It seems to be important to evaluate lower jaw in a 3-dimensional manner to prevent surgical complications.
足够的骨量对于将牙种植体放置在理想位置是必要的。为了恢复严重不足的骨量，文献中提出了各种口腔内供体部位的自体块状移植物程序。本回顾性研究的目的是介绍潜在的下颌支块移植物部位的尺寸和体积，并评估下颌管直径及其与下颌支块移植物体积的关系的可能影响。评估了 200 个锥形束计算机断层扫描（CBCT）图像。测量了潜在的下颌支块移植物部位的最大长度、宽度、高度和体积、下颌管直径、下颌管-下颌基底部距离和下颌管-牙槽嵴距离。下颌管直径、下颌管-牙槽嵴距离和下颌管-下颌基底部距离分别为 3.139 ± 0.446 毫米、15.376 ± 2.562 毫米和 7.834 ± 1.285 毫米。此外，还测量了潜在的下颌支块移植物部位的尺寸为 11.156 ± 2.297 毫米×10.390 ± 3.420 毫米×8.816 ± 1.720 毫米（高度×长度×宽度）。此外，潜在的下颌支骨块体积计算为 1.076 ± 0.398 立方厘米。下颌管-牙槽嵴距离与潜在的下颌支块移植物体积呈正相关（r =.160，P =.025），而下颌管-下颌基底部距离与潜在的下颌支块移植物体积呈负相关（r = -.020，P =.001）。下颌支是骨增强程序的可预测的口腔内供体部位之一。然而，支具有与其相邻解剖结构相关的一些体积限制。似乎重要的是要以三维方式评估下颌骨，以防止手术并发症。
