Oral Medicine Department, College of Dentistry, Al-Mustansiriyah University, Baghdad, Iraq.
Oral Surgery and Periodontology Department, College of Dentistry, Mustansiriyah University, Baghdad, Iraq.
ScientificWorldJournal. 2023 Apr 17;2023:8863318. doi: 10.1155/2023/8863318. eCollection 2023.
Understanding the quality of the ridge and facial cortical bone in the aesthetic zone is important for treatment with an immediate dental implant. This study aimed to analyze bone density and widths of the facial cortical bone and alveolar ridge at the central incisors in relation to arch form. A total of 400 teeth from 100 cone-beam CT images were divided equally between the upper and lower central incisors. The central incisor area was assessed for the width of the facial cortical and alveolar bones at three different points (3 mm, 6 mm, and 9 mm from the cementoenamel junction). Arch forms and densities of cortical and cancellous bones in the interradicular regions were evaluated. The difference in facial cortical bone thickness at 3 points was smaller for the upper teeth than for the lower teeth on both sides. The alveolar bone width was higher in the maxilla than the mandible with highly significant differences ( < 0.001). The highest bone density was at the buccal aspect of the mandible (897.36 ± 136.72 HU), while the lowest density was at the cancellous bone of the maxilla (600.37 ± 126.63 HU). The dominant arch form was ovoid 71%, followed by square 20% and the tapering arch form 10%. The tapering arch form has the highest alveolar bone width in the upper jaw without statistical significance. The facial cortical bone thickness needs to be evaluated before implantation in the anterior region because it is less than two millimeters in both jaws. CBCT is important for the immediate implant. The ovoid shape was the dominant arch form.
理解美学区域的嵴和面部皮质骨的质量对于即刻牙种植治疗非常重要。本研究旨在分析与牙弓形态相关的中央切牙区颊侧皮质骨和牙槽嵴的骨密度和宽度。将 100 个锥形束 CT 图像的 400 颗牙齿平均分配到上下颌中切牙。评估中切牙区域颊侧皮质骨和牙槽骨在三个不同点（距釉牙骨质界 3、6 和 9mm）的宽度。评估根间区域皮质骨和松质骨的牙弓形态和密度。上颌牙齿在三个点的颊侧皮质骨厚度差异小于下颌牙齿。上颌牙槽骨宽度高于下颌，差异具有统计学意义（<0.001）。下颌颊侧皮质骨的骨密度最高（897.36±136.72 HU），而上颌松质骨的骨密度最低（600.37±126.63 HU）。占主导地位的牙弓形态是卵圆形，占 71%，其次是方形占 20%，锥形牙弓形态占 10%。锥形牙弓形态在上颌的牙槽骨宽度最高，但无统计学意义。在前牙区植入前需要评估颊侧皮质骨厚度，因为在上下颌中，颊侧皮质骨厚度都小于 2 毫米。CBCT 对即刻种植非常重要。卵圆形是占主导地位的牙弓形态。
