Rezaie Mostafa, Ghapanchi Jannan, Haghnegahdar Abdolaziz, Khojastehpour Leila, Khorshidi Hooman, Heidari Heshmatollah
Department of Oral and Maxillofacial Medicine, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Int J Dent. 2018 Apr 1;2018:5253965. doi: 10.1155/2018/5253965. eCollection 2018.
The missing of permanent first molars influences the occlusal status and dental health. The purpose of this study was to determine the prevalence of missing first molar teeth in a selected population of Shiraz, Iran. . A total of 2206 panoramic views of patients aged from 7 to 75 years old were inspected for missing of permanent first molars. Patients were categorized into five age groups: from 7 to 15, 16 to 30, 31 to 45, 46 to 60, and more than 60 years old. Data were categorized according to sex, age, and number of lost teeth using SPSS software. . No first molar was missing in 59.9% of the cases, 17.05% had lost one, 10.4% had lost two, 7.2% had lost three, and 5% were missing all four of their permanent first molars. The mandibular first molar was the most commonly lost tooth, and the left side in both jaws was more affected than the right side. There was a positive relation between age and missing first molar. . A missing first molar is a common finding in southern Iran population. Due to the important role of permanent first molars in occlusion, more education and dental care is recommended to preserve these teeth.
恒牙第一磨牙的缺失会影响咬合状况和牙齿健康。本研究的目的是确定伊朗设拉子特定人群中第一磨牙缺失的患病率。对2206例年龄在7至75岁之间患者的全景片进行检查，以确定恒牙第一磨牙的缺失情况。患者被分为五个年龄组：7至15岁、16至30岁、31至45岁、46至60岁以及60岁以上。使用SPSS软件根据性别、年龄和缺失牙数量对数据进行分类。59.9%的病例中没有第一磨牙缺失，17.05%的患者缺失一颗，10.4%的患者缺失两颗，7.2%的患者缺失三颗，5%的患者四颗恒牙第一磨牙全部缺失。下颌第一磨牙是最常缺失的牙齿，双侧下颌的左侧比右侧受影响更严重。年龄与第一磨牙缺失之间存在正相关。第一磨牙缺失在伊朗南部人群中是常见现象。由于恒牙第一磨牙在咬合中起重要作用，建议加强教育并提供更多牙齿护理以保留这些牙齿。
