Sinha Suraj Prasad, Bajracharya Manish, Huang Chiung-Shing, Ko Ellen Wen-Ching
Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
Dental Department, Orthodontic Unit, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal.
Clin Oral Investig. 2023 Jan;27(1):299-304. doi: 10.1007/s00784-022-04723-3. Epub 2022 Sep 14.
The study investigated orthodontic tooth movement by comparing various horizontal and angular measures of the teeth having different sinus-root relationship (SRR) of patients undergoing first premolar extraction treatment protocols.
This retrospective cross-sectional study included 45 Taiwanese adult patients, classified as the control group (n = 15) and the sinus group (n = 30) according to SRR. The control group had type I SRR (sinus floor above the level connecting the buccal and palatal root apices), whereas the sinus group included patients with type V SRR (the buccal and palatal root displayed apical protrusion into the sinus floor). Morphology was identified using pretreatment orthopantomograms. Lateral cephalometric measurements were conducted before treatment (T1) and at debonding (T2).
Post debonding, there were no statistically significant difference in the two groups. However, the incisors in the control group became marginally more upright than those of the sinus group, and the molars demonstrated tipping movement with minimal anchorage loss in the sinus group than in the control group. The total treatment time was not significantly different between the 2 groups.
The study revealed that the sinus-root relationship does not affect the orthodontic tooth movement. However, a more extensive 3-D study with larger sample size is strongly recommended before coming to any conclusion.
The lining of the floor of the maxillary sinus does not affect the orthodontic tooth movement.
本研究通过比较接受第一前磨牙拔除治疗方案的患者中，具有不同窦-根关系（SRR）的牙齿的各种水平和角度测量值，来研究正畸牙齿移动情况。
这项回顾性横断面研究纳入了45名台湾成年患者，根据SRR分为对照组（n = 15）和窦组（n = 30）。对照组为I型SRR（窦底高于连接颊侧和腭侧根尖的水平），而窦组包括V型SRR患者（颊侧和腭侧根向窦底呈根尖突出）。使用治疗前的曲面断层片确定形态。在治疗前（T1）和去粘结时（T2）进行侧位头影测量。
去粘结后，两组之间无统计学显著差异。然而，对照组的切牙比窦组的切牙略微更直立，并且窦组的磨牙比对照组表现出倾斜移动且支抗丧失最小。两组的总治疗时间无显著差异。
该研究表明窦-根关系不影响正畸牙齿移动。然而，在得出任何结论之前，强烈建议进行更大样本量的更广泛的三维研究。
上颌窦底的衬里不影响正畸牙齿移动。
