Ataman-Duruel Emel Tuğba, Beycioğlu Zehra, Yılmaz Doğukan, Goyushov Samir, Çimen Tansu, Duruel Onurcem, Yılmaz Hasan Güney, Tözüm Tolga Fikret
Department of Periodontology, Faculty of Dentistry, Hacettepe University, AnkaraTurkey.
Department of Periodontology, Faculty of Dentistry, Sakarya University, SakaryaTurkey.
J Oral Maxillofac Res. 2023 Sep 30;14(3):e4. doi: 10.5037/jomr.2023.14304. eCollection 2023 Jul-Sep.
The objectives of this retrospective study are to measure the amount of the alveolar crest cortication and cortication around the mandibular canal, and to evaluate bone density values of alveolar crest, cortication around mandibular canal, and possible implant placement area for edentulous sites.
Six hundred forty-two cone-beam computed tomography scans from 642 subjects were evaluated in four centers. Cortical thicknesses of alveolar crest and mandibular canal cortical borders (buccal, lingual, apical, and coronal) in each mandibular posterior teeth region were measured. Bone density of alveolar crest and mandibular canal cortical borders (buccal, lingual, apical, and coronal) in each mandibular posterior teeth region were recorded. The correlations between numeric variables were investigated using Pearson's correlation test.
The largest cortical border of the canal was measured 1.1 (SD 0.71) mm at the left second molar area and in coronal side of the mandibular canal (MC). Left and right first premolar regions showed higher bone density values compared to the other sites in all bone density values evaluations. The buccal side of the canal at the right first premolar region showed the highest bone density values (832.32 [SD 350.01]) while the coronal side of the canal at the left second molar region showed the lowest (508.75 [SD 225.47]). The bone density of possible implant placement area at the both left (692.25 [SD 238.25]) and right (604.43 [SD 240.92]) edentulous first premolar showed the highest values. Positive correlations between the bone density values of alveolar crest and the coronal side of MC were found in molar and left second premolar regions (P < 0.05).
Results may provide information about the amount of cortication and bone densities tooth by tooth for posterior mandible to surgeons for planning the treatment precisely.
本回顾性研究的目的是测量牙槽嵴皮质化程度以及下颌管周围的皮质化程度，并评估牙槽嵴、下颌管周围皮质化以及无牙区可能的种植体植入区域的骨密度值。
在四个中心对642名受试者的642份锥形束计算机断层扫描进行了评估。测量了每个下颌后牙区域牙槽嵴和下颌管皮质边界（颊侧、舌侧、根尖和冠方）的皮质厚度。记录了每个下颌后牙区域牙槽嵴和下颌管皮质边界（颊侧、舌侧、根尖和冠方）的骨密度。使用Pearson相关检验研究数值变量之间的相关性。
在下颌管的左侧第二磨牙区域及冠方，测量到管的最大皮质边界为1.1（标准差0.71）mm。在所有骨密度值评估中，左右第一前磨牙区域与其他部位相比显示出更高的骨密度值。右侧第一前磨牙区域管的颊侧显示出最高的骨密度值（832.32[标准差350.01]），而左侧第二磨牙区域管的冠方显示出最低的骨密度值（508.75[标准差225.47]）。左右无牙第一前磨牙可能的种植体植入区域的骨密度均显示出最高值。在磨牙和左侧第二前磨牙区域发现牙槽嵴骨密度值与下颌管冠方骨密度值之间存在正相关（P<0.05）。
研究结果可为外科医生精确规划治疗方案提供下颌后牙逐牙的皮质化程度和骨密度信息。
