Abstract：
OBJECTIVE: To determine the relationship of anterior occlusion and skeletal variables with the frontal sinus index.
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.
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.
摘要：
目的：确定前闭塞和骨骼变量与额窦指数的关系。
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。
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。
