Abstract：
OBJECTIVE: This study aimed to describe clinical and imaging analysis of supernumerary teeth in the mandibular region of 22 cases.
METHODS: Retrospective study.
METHODS: This study enrolled patients diagnosed with supernumerary teeth who underwent cone beam computed tomography (CBCT) at Stomatology Hospital of Xi\'an Jiaotong University from August 2016 to September 2022. Participants included individuals aged 7-29 years of both genders. The following variables were examined: number of supernumerary teeth, location, shape, direction, length, relationship with adjacent teeth and surrounding anatomical structures, and secondary effects.
RESULTS: Out of 236 subjects, 22 (6.02%) were found to have supernumerary teeth in the mandibular region, with a total of 62 teeth identified. The male-to-female ratio was 5:6. Most supernumerary teeth were located in the lingual side of the mandibular region, particularly in the 34-35 tooth area (21.66%), followed by the 44-45 tooth region. The vast majority of supernumerary teeth (96.77%) were impacted, and more than half (51.67%) were located near the mental nerve canal. The average length of the supernumerary teeth was 10.5 mm. While no primary complications were observed, some secondary symptoms were noted, such as the ectopic eruption of adjacent teeth and crowding of permanent teeth.
CONCLUSIONS: The supernumerary teeth in the mandibular area have regional characteristics, which can provide for clinical diagnosis and treatment. CBCT can accurately analyze the location of supernumerary teeth and their secondary effects, and provides the treatment plan on that basis.
METHODS: Retrospective study.
METHODS: This study enrolled patients diagnosed with supernumerary teeth who underwent cone beam computed tomography (CBCT) at Stomatology Hospital of Xi\'an Jiaotong University from August 2016 to September 2022. Participants included individuals aged 7-29 years of both genders. The following variables were examined: number of supernumerary teeth, location, shape, direction, length, relationship with adjacent teeth and surrounding anatomical structures, and secondary effects.
RESULTS: Out of 236 subjects, 22 (6.02%) were found to have supernumerary teeth in the mandibular region, with a total of 62 teeth identified. The male-to-female ratio was 5:6. Most supernumerary teeth were located in the lingual side of the mandibular region, particularly in the 34-35 tooth area (21.66%), followed by the 44-45 tooth region. The vast majority of supernumerary teeth (96.77%) were impacted, and more than half (51.67%) were located near the mental nerve canal. The average length of the supernumerary teeth was 10.5 mm. While no primary complications were observed, some secondary symptoms were noted, such as the ectopic eruption of adjacent teeth and crowding of permanent teeth.
CONCLUSIONS: The supernumerary teeth in the mandibular area have regional characteristics, which can provide for clinical diagnosis and treatment. CBCT can accurately analyze the location of supernumerary teeth and their secondary effects, and provides the treatment plan on that basis.
摘要：
目的：本研究旨在描述22例下颌区域多生牙的临床和影像学分析。
方法：回顾性研究。
方法：本研究纳入2016年8月至2022年9月在西安交通大学口腔医院行锥形束CT（CBCT）诊断为多生牙的患者。参与者包括两种性别的7-29岁的个人。检查了以下变量：多余牙齿的数量，location,形状,方向,长度,与相邻牙齿和周围解剖结构的关系，和次要影响。
结果：在236名受试者中，下颌区域有22颗（6.02％）的牙齿，共识别出62颗牙齿。男女比例为5:6。大多数多余的牙齿位于下颌区域的舌侧，特别是在34-35牙齿区域（21.66％），其次是44-45牙齿区域。绝大多数多余牙齿(96.77%)受累,超过一半(51.67%)位于精神神经管附近。多余牙齿的平均长度为10.5mm。虽然没有观察到原发性并发症，注意到一些次要症状，例如相邻牙齿的异位萌出和恒牙的拥挤。
结论：下颌区域的多余牙齿具有区域特征，可以为临床诊断和治疗提供依据。CBCT可以准确分析多余牙齿的位置及其次要影响，并在此基础上提供治疗计划。
方法：回顾性研究。
方法：本研究纳入2016年8月至2022年9月在西安交通大学口腔医院行锥形束CT（CBCT）诊断为多生牙的患者。参与者包括两种性别的7-29岁的个人。检查了以下变量：多余牙齿的数量，location,形状,方向,长度,与相邻牙齿和周围解剖结构的关系，和次要影响。
结果：在236名受试者中，下颌区域有22颗（6.02％）的牙齿，共识别出62颗牙齿。男女比例为5:6。大多数多余的牙齿位于下颌区域的舌侧，特别是在34-35牙齿区域（21.66％），其次是44-45牙齿区域。绝大多数多余牙齿(96.77%)受累,超过一半(51.67%)位于精神神经管附近。多余牙齿的平均长度为10.5mm。虽然没有观察到原发性并发症，注意到一些次要症状，例如相邻牙齿的异位萌出和恒牙的拥挤。
结论：下颌区域的多余牙齿具有区域特征，可以为临床诊断和治疗提供依据。CBCT可以准确分析多余牙齿的位置及其次要影响，并在此基础上提供治疗计划。
