Department of Orthodontics and Dentofacial Orthopaedics, Dr. Ishrat-Ul-Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi, Pakistan.
School of Public Health, Dow University of Health Sciences, Karachi, Pakistan.
J Pak Med Assoc. 2024 Jul;74(7):1224-1228. doi: 10.47391/JPMA.6679.
To determine the relationship of anterior occlusion and skeletal variables with the frontal sinus index.
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.
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).
The frontal sinus index could be considered an indicator of harmonious anterior occlusion.
探讨前牙咬合与骨骼变量与额窦指数的关系。
这是一项回顾性、分析性、横断面研究，于 2020 年 7 月至 11 月在卡拉奇的伊斯拉特尔-埃巴德汗口腔健康科学研究所和道大学牙科学院进行，纳入了 2015 年至 2018 年用于确定额窦指数和其他头影测量变量的治疗前侧位头颅侧位片的数据。观察牙模的切牙分类。具有 I 类切牙的患者为对照组，其余的 5 个错颌畸形组为实验组。追踪额窦并计算窦指数。数据使用 STATA 15 和 R 3.5.1 进行分析。
在 240 名受试者中，每组有 40 名（16.66%）；女性 155 名（64.6%），男性 85 名（35.4%）。样本的平均年龄为 21.33±3.52 岁（16-29 岁）。所有错颌畸形组的平均窦指数均高于对照组，但仅在 II 类 2 分类和前牙开颌组中差异有统计学意义（p<0.05）。唯一的例外是 II 类 1 分类，无论有无接触，其值均较低（p>0.05）。前颅底长度、蝶鞍-下颌平面角和上切牙腭平面角均显著影响额窦指数（p<0.05）。
额窦指数可作为前牙咬合协调的指标。
