METHODS: The retrospective, analytical, cross-sectional, study was conducted from July to November 2020 at Dr Ishratul- Ebad Khan Institute of Oral Health Sciences and Dow Dental College, Dow University of Health Sciences, Karachi, and comprised data from 2015 to 2018 related to pre-treatment lateral cephalograms for determining frontal sinus index and other cephalometric variables. The dental casts were observed for incisor classification. Patients with Class I incisors formed the comparison group, while the rest comprised 5 malocclusion groups. The frontal sinus was traced, and the sinus index was calculated. Data was analysed using STATA 15 and R 3.5.1.
RESULTS: Of the 240 subjects, there were 40(16.66%) in each of the 6 groups; 155(64.6%) females and 85(35.4%) males. The mean age of the sample was 21.33±3.52 years (range: 16-29 years). The mean sinus index was higher in all malocclusion groups than the comparison group, but it was significantly higher only in Class II division 2 and anterior open bite groups (p<0.05). The only exception to the trend was Class II division 1 with and without contact in which the value was lower (p>0.05). The anterior cranial base length, sella-nasion mandibular plane angle, and upper incisor palatal plane angle significantly affected the frontal sinus index (p<0.05).
CONCLUSIONS: The frontal sinus index could be considered an indicator of harmonious anterior occlusion.
方法:回顾性研究,分析,横截面,研究于2020年7月至11月在Isratul-EbadKhan口腔健康科学研究所和陶氏牙科学院进行,陶氏健康科学大学,卡拉奇,包括2015年至2018年与治疗前侧位脑电图相关的数据,用于确定额窦指数和其他头颅测量变量.观察牙模的切牙分类。I类门牙患者组成对照组,其余为5个错牙合组。额窦被追踪,并计算了窦性心指数。使用STATA15和R3.5.1分析数据。
结果:在240名受试者中,6组每组40例(16.66%);女性155例(64.6%),男性85例(35.4%)。样本的平均年龄为21.33±3.52岁(范围:16-29岁)。所有错牙合畸形组的平均窦房结指数均高于对照组,但仅在II类2级和前开放咬合组中明显更高(p<0.05)。该趋势的唯一例外是有和没有接触的II类分类1,其中该值较低(p>0.05)。前颅底长度,Sella-nasion下颌平面角,上切牙腭平面角度显著影响额窦指数(p<0.05)。
结论:额窦指数可以被认为是和谐前路闭塞的指标。