论文部分内容阅读
目的探讨正畸治疗对成年安氏Ⅱ类高角型错患者颞下颌关节的影响。方法对2007年10月至2001年10月到云南省第二人民医院口腔正畸科就诊的21例成年安氏Ⅱ类高角型错患者,采用自锁托槽矫治技术进行正畸治疗,分别于治疗前、后,利用16层螺旋CT,进行颞下颌关节扫描,然后通过多层面重建(multiplanarreformation,MPR)技术对颞下颌关节进行三维重建及参数测量,并对结果进行统计学分析。结果治疗后有27侧髁状突处于关节窝内中性位,占57.2%(27/42),与治疗前比较,差异无统计学意义(P>0.05);而处于关节窝前位和后位的髁状突构成比分别为33.3%(12/42)和9.5%(4/42),与治疗前比较,差异均有统计学意义(均P<0.05)。髁状突前斜面倾角测量值在治疗后平均增大1.64°,与治疗前比较差异有统计学意义(P<0.05);关节结节后斜面斜度,关节窝前后径、内外径和关节窝高度的测量值与治疗前比较,差异无统计学意义(P>0.05)。结论正畸治疗能使成年安氏Ⅱ类高角型错患者的髁状突位置前移及髁状突前斜面适应性改建,但不会对颞下颌关节骨性结构和功能产生不利影响。
Objective To investigate the effect of orthodontic treatment on temporomandibular joint in adult patients with Class Ⅱ malocclusion. Methods From October 2007 to October 2001, 21 cases of adult Angle II malocclusion were treated by Department of Orthodontics, Second People’s Hospital of Yunnan Province, and orthodontic treatment was performed by self-ligating brackets technique Before and after treatment, the TMJ was scanned with 16-slice spiral CT. Then the three-dimensional reconstruction and parameter measurement of temporomandibular joint were performed by multiplanar reconstruction (MPR) technique, and the results were statistically analyzed. Results After treatment, 27 lateral condyles were located in the median joint socket, accounting for 57.2% (27/42), with no significant difference compared with those before treatment (P> 0.05) (33.3% (12/42) and 9.5% (4/42) respectively). The differences between the two groups were statistically significant (all P <0.05). The pre-condylar inclination inclinometer measured an average increase of 1.64 ° after treatment, compared with the pre-treatment difference was statistically significant (P <0.05); incision slope, joint anteroposterior diameter, internal and external diameter and the socket There was no significant difference between the measured values and before treatment (P> 0.05). Conclusion Orthodontic treatment can promote the advancement of condyles and condylar anterior condyloma in adult patients with Class Ⅱ malocclusion without adversely affecting the bony structure and function of temporomandibular joint.