Department of Orthodontics, Dental Research Institute, and Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, South Korea.
Orthod Craniofac Res. 2024 Jun;27 Suppl 1:35-41. doi: 10.1111/ocr.12713. Epub 2023 Oct 4.
The purpose was to identify the maxillary basal arch forms utilizing the root apices and compare the maxillary basal arch form of groups with cleft lip and palate (CLP) and normal group.
This study included 30 patients (21.8 ± 3.5 years old) with unilateral CLP (ULCP group) and 30 patients (20.9 ± 2.2 years old) with bilateral CLP (BCLP group). The normal group consisted of 30 non-cleft patients (21.2 ± 2.3 years old) with normal occlusion. Three-dimensional (3D) Cartesian coordinates of the root apices of each tooth were determined using cone-beam computed tomography. The 3D coordinates were projected onto the palatal plane to create the 2D coordinates. Thereafter, the basal arch forms were constructed by the Procrustes superimposition. Finally, For the basal arch form comparisons among groups, the inter-root widths were measured.
Both CLP groups had a narrower inter-root width than the normal group. The BCLP group had significantly narrower premolar and molar widths than the UCLP group (P < .05). Especially, the inter-first molar width of the UCLP and BCLP groups was 3.7 ± 0.7 (P < .001) and 6.6 ± 0.8 (P < .001) mm smaller than that of the normal group, respectively.
We used the root apices to identify the basal arch forms. The basal arch form of patients with CLP was narrower than that of the normal group. The basal arch form of patients with BCLP was narrower than that of patients with UCLP. Our findings may help clinicians better comprehend basal arch forms in patients with CLP and transverse discrepancies.
利用根尖确定上颌基骨弓形态，并比较唇腭裂（CLP）组和正常组的上颌基骨弓形态。
本研究纳入了 30 名单侧 CLP 患者（21.8±3.5 岁，ULCP 组）和 30 名双侧 CLP 患者（20.9±2.2 岁，BCLP 组），以及 30 名非 CLP 正常患者（21.2±2.3 岁，正常组）。使用锥形束 CT 确定每个牙齿根尖的三维（3D）笛卡尔坐标。将 3D 坐标投影到腭平面上以创建 2D 坐标。然后，通过 Procrustes 叠加构建基骨弓形态。最后，为了比较各组基骨弓形态，测量了根间宽度。
CLP 两组的根间宽度均小于正常组。BCLP 组的前磨牙和磨牙宽度明显小于 ULCP 组（P<.05）。特别是，ULCP 和 BCLP 组的第一磨牙间宽度分别比正常组小 3.7±0.7（P<.001）和 6.6±0.8（P<.001）mm。
我们使用根尖来确定基骨弓形态。CLP 患者的基骨弓形态比正常组窄。BCLP 患者的基骨弓形态比 ULCP 患者窄。我们的发现可能有助于临床医生更好地理解 CLP 患者和横向差异患者的基骨弓形态。
