背景:精神孔(MF)的3D位置在牙科种植和下颌手术或局部麻醉中具有重要的临床价值。尽管它很重要,尚不清楚MF的位置在不同的个体中如何改变,因为关于MF位置与垂直生长模式之间的关联的文献不存在,而关于MF位置与骨骼咬合不正之间的联系的文献很少。因此,我们的目标是调查这些,第一次,锥束计算机断层摄影(CBCT)。
方法:9个子组的存档CBCT(即,3骨骼类I,II,和III×3垂直生长模式,短脸,正常面部)是通过评估患者SNA收集的,SNB,ANB,面部角度,降低面部高度,和FMA(n=9×40=360)。纳入的病例年龄超过17岁,没有任何正畸/正颌治疗史(243名妇女,117人,平均年龄:22.28±2.80岁)。MF和3个固定骨结构之间的垂直距离(下颌联合[S/宽度],下颌支[R/长度],和下颌下皮质[C/高度])在两个半大脑的不同截面上进行了测量。将左侧和右侧测量结果组合。使用3路ANCOVA分析数据,Bonferroni,单向方差分析,Tamhane,皮尔森,和t检验(α=0.05)。
结果:宽度在II类病例中最小,在III类病例中最大(所有P值<0.000001,Bonferroni)。长面孔最短,短面孔最长(所有P值≤0.00008)。III类的下上身高均大于I类和II类(P值均≤0.003);I类和II类之间的身高没有显着差异(P=0.684)。长面中的高度最大,短面中的高度最小(所有P值<0.000001)。前后长度在III类中最大,在II类中最小(所有P值<0.000001)。与正常或长脸人相比,短脸人的长度更大(P≤0.00003);然而,长面和正常面的长度没有差异(P=0.448).受试者年龄与他们的MF位置无关(P≥0.579,皮尔逊系数)。性别二态仅存在于身高(P=0.009,t检验),而不存在于长度或宽度。
结论:MF位置在各种水平或垂直生长模式和性别中可能存在很大差异。在下颌骨手术中应注意这一点。
The 3D position of the mental foramen (MF) is of significant clinical value in dental
implantology and mandibular surgeries or in local anesthesia. Despite its importance, it is not clearly known how the position of MF can alter in different individuals, since the literature on the associations between the MF position with vertical growth patterns is non-existent and those on links between the MF position and skeletal malocclusions are scarce. Therefore, we aimed to investigate these, for the first time, on cone-beam computed tomographies (CBCTs).
Archival CBCTs of 9 sub-groups (i.e., 3 skeletal Classes I, II, and III × 3 vertical growth patterns \'long face, short face, normal face\') were collected by evaluating patients\' SNA, SNB, ANB, facial angle, lower facial height, and FMA (n = 9 × 40 = 360). Included cases were older than 17 years and without any history of orthodontic/orthognathic treatments (243 women, 117 men, mean age: 22.28 ± 2.80 years). Perpendicular distances between the MF and 3 fixed bony structures (the mandibular symphysis [S/width], the mandibular ramus [R/length], and the mandibular lower cortex [C/height]) were measured on different sectional planes on both hemimandibles. Left- and right-side measurements were combined. Data were analyzed using the 3-way ANCOVA, Bonferroni, one-way ANOVA, Tamhane, Pearson, and t-test (α = 0.05).
Width was the smallest in Class II and greatest in Class III cases (all P values < 0.000001, Bonferroni). It was the shortest in long faces and longest in short faces (all P values ≤ 0.00008). The inferior-superior height was larger in Class III than both Classes I and II (both P values ≤ 0.003); there was no significant difference between Classes I and II in terms of height (P = 0.684). Height was the largest in long faces and smallest in short faces (all P values < 0.000001). The anterior-posterior length was the largest in Class III and smallest in Class II (all P values < 0.000001). Length was larger in short-face people versus normal- or long-face individuals (P ≤ 0.00003); nevertheless, long and normal faces did not differ in terms of length (P = 0.448). Subjects\' age was not correlated with their MF positions (P ≥ 0.579, Pearson coefficient). Sex dimorphism existed only for height (P = 0.009, t-test) but not for length or width.
The MF position may considerably differ in various horizontal or vertical growth patterns and sexes. This should be noted in mandible surgeries.