Abstract：
OBJECTIVE: This study aimed to evaluate the position of the mandibular lingula (ML) in adult patients (aged between 18 and 35 years old) with different skeletal and growth patterns using cone-beam computed tomography (CBCT).
METHODS: Cross-sectional.
METHODS: Dentistry department of University.
METHODS: Subjects comprised CBCT images of 150 adult patients, including 300 rami.
METHODS: In total, 150 CBCT aged between 18 and 35 were selected and divided into three main groups of 50 samples based on their skeletal relationships (classes I, II and III). Patients were subdivided based on their growth pattern (vertical vs. horizontal), resulting in 25 samples per subgroup. Distances between the mandibular lingula and occlusal plane (ML-OP), sigmoid notch (ML-SN), external oblique ridge (ML-EOR), internal oblique ridge (ML-IOR), posterior border of the ramus (ML-PBR), inferior border of the ramus (ML-IBR), and horizontal and vertical distances to the mandibular foramen (ML-hMF and ML-vMF). One-way ANOVA variance analysis was employed to compare different angle classifications, and Bonferroni analysis was used for multiple comparisons. The Student\'s t-test was also used to compare growth patterns within each main group and genders within the subgroup.
RESULTS: The study revealed statistically significant differences in the position of the mandibular lingula between different angle classifications, growth patterns, and genders. Class II samples showed a more anterior position of the ML, whereas Class III samples displayed a more posterior position of the ML. Patients with horizontal growth patterns and Angle Class III had a more posteriorly positioned ML. Gender differences were observed, particularly in Class I and Class III classifications, suggesting that gender may influence the variability of ML position in these specific classifications.
CONCLUSIONS: The position of the mandibular lingula showed high variability among individuals with different angle classifications, growth patterns and genders.
METHODS: Cross-sectional.
METHODS: Dentistry department of University.
METHODS: Subjects comprised CBCT images of 150 adult patients, including 300 rami.
METHODS: In total, 150 CBCT aged between 18 and 35 were selected and divided into three main groups of 50 samples based on their skeletal relationships (classes I, II and III). Patients were subdivided based on their growth pattern (vertical vs. horizontal), resulting in 25 samples per subgroup. Distances between the mandibular lingula and occlusal plane (ML-OP), sigmoid notch (ML-SN), external oblique ridge (ML-EOR), internal oblique ridge (ML-IOR), posterior border of the ramus (ML-PBR), inferior border of the ramus (ML-IBR), and horizontal and vertical distances to the mandibular foramen (ML-hMF and ML-vMF). One-way ANOVA variance analysis was employed to compare different angle classifications, and Bonferroni analysis was used for multiple comparisons. The Student\'s t-test was also used to compare growth patterns within each main group and genders within the subgroup.
RESULTS: The study revealed statistically significant differences in the position of the mandibular lingula between different angle classifications, growth patterns, and genders. Class II samples showed a more anterior position of the ML, whereas Class III samples displayed a more posterior position of the ML. Patients with horizontal growth patterns and Angle Class III had a more posteriorly positioned ML. Gender differences were observed, particularly in Class I and Class III classifications, suggesting that gender may influence the variability of ML position in these specific classifications.
CONCLUSIONS: The position of the mandibular lingula showed high variability among individuals with different angle classifications, growth patterns and genders.
摘要：
目的：本研究旨在使用锥形束计算机断层扫描（CBCT）评估具有不同骨骼和生长模式的成年患者（年龄在18至35岁之间）的下颌舌（ML）的位置。
方法：横断面。
方法：大学牙科系。
方法：受试者包括150名成年患者的CBCT图像，包括300个rami.
方法：总共，选择年龄在18至35岁之间的150个CBCT，并根据其骨骼关系分为三个主要组，每组50个样本（I类，II和III）。患者根据其生长模式进行细分(垂直与水平),导致每个亚组25个样本。下颌舌骨和咬合平面（ML-OP）之间的距离，乙状缺口（ML-SN），外斜脊（ML-EOR），内斜脊（ML-IOR），支的后边界（ML-PBR），下缘的ramus（ML-IBR），以及到下颌孔的水平和垂直距离（ML-hMF和ML-vMF）。采用单因素方差分析比较不同的角度分类，Bonferroni分析用于多重比较。学生t检验也用于比较每个主要组中的生长模式和亚组中的性别。
结果：该研究揭示了不同角度分类之间下颌舌骨位置的统计学差异，增长模式，和性别。II类样本显示ML的位置更靠前，而III类样本显示ML的更靠后的位置。具有水平生长模式和角度III类的患者的ML位置更靠后。观察到性别差异，特别是在I类和III类分类中，这表明性别可能会影响这些特定分类中ML位置的变异性。
结论：下颌舌骨的位置在不同角度分类的个体中表现出高度变异性，增长模式和性别。
方法：横断面。
方法：大学牙科系。
方法：受试者包括150名成年患者的CBCT图像，包括300个rami.
方法：总共，选择年龄在18至35岁之间的150个CBCT，并根据其骨骼关系分为三个主要组，每组50个样本（I类，II和III）。患者根据其生长模式进行细分(垂直与水平),导致每个亚组25个样本。下颌舌骨和咬合平面（ML-OP）之间的距离，乙状缺口（ML-SN），外斜脊（ML-EOR），内斜脊（ML-IOR），支的后边界（ML-PBR），下缘的ramus（ML-IBR），以及到下颌孔的水平和垂直距离（ML-hMF和ML-vMF）。采用单因素方差分析比较不同的角度分类，Bonferroni分析用于多重比较。学生t检验也用于比较每个主要组中的生长模式和亚组中的性别。
结果：该研究揭示了不同角度分类之间下颌舌骨位置的统计学差异，增长模式，和性别。II类样本显示ML的位置更靠前，而III类样本显示ML的更靠后的位置。具有水平生长模式和角度III类的患者的ML位置更靠后。观察到性别差异，特别是在I类和III类分类中，这表明性别可能会影响这些特定分类中ML位置的变异性。
结论：下颌舌骨的位置在不同角度分类的个体中表现出高度变异性，增长模式和性别。
