Ageel Basmah Mustafa, Siraj Elaf Abdulrahman, Zawawi Khalid Hashim, Afify Ahmed Rami
Dental Intern, Dentistry Program, King Abdulaziz University, Jeddah, Saudi Arabia.
Department of Orthodontic, King Abdulaziz University Faculty of Dentistry, Jeddah, Saudi Arabia.
J Pharm Bioallied Sci. 2021 Nov;13(Suppl 2):S965-S968. doi: 10.4103/jpbs.jpbs_82_21. Epub 2021 Nov 10.
After orthodontic treatment, some teeth undergo external root resorption due to different factors, such as the root shape, oral habits, biological and genetic factor, gender, and age. Furthermore, extraction cases, long treatment duration, and the amount of force applied during the treatment might be related to root resorption.
Panoramic radiographs for 226 patients treated in the orthodontic department were screened. The lower first permanent molars, lower second premolars, and lower first premolars were measured in centimeters on a ruler using ImageJ System. Teeth were measured from the cusp tip to the cementoenamel junction (CEJ) and from the CEJ to the root apex, and then, the tooth was measured as a whole before and after the treatment.
Multiple analysis of variance showed that there were no interactions between the root lengths of all teeth tested and either gender, treatment type, or treatment duration ( > 0.05).
Based on the results of this study, no statistically significance relationship between external apical root resorption and gender, type of treatment, and treatment duration was found.
正畸治疗后，部分牙齿会因不同因素发生牙根外部吸收，这些因素包括牙根形态、口腔习惯、生物和遗传因素、性别以及年龄。此外，拔牙病例、较长的治疗时间以及治疗过程中施加的力量大小可能与牙根吸收有关。
筛选了正畸科治疗的226例患者的全景X线片。使用ImageJ系统在直尺上以厘米为单位测量下颌第一恒磨牙、下颌第二前磨牙和下颌第一前磨牙。测量牙齿从牙尖到牙骨质釉质界（CEJ）以及从CEJ到根尖的长度，然后在治疗前后对整个牙齿进行测量。
多因素方差分析表明，所有测试牙齿的牙根长度与性别、治疗类型或治疗时间之间均无交互作用（>0.05）。
基于本研究结果，未发现根尖外部吸收与性别、治疗类型和治疗时间之间存在统计学意义上的关系。
