Nindra Jasmine, Sidhu Maninder Singh, Kochhar Anuraj Singh, Dabas Ashish, Valletta Rosa, Rongo Roberto, Spagnuolo Gianrico
Department of Orthodontics, Faculty of Dental Sciences, SGT University, Gurgaon 122505, India.
Faculty of Dentistry, University of Toronto, Toronto, ON M5G 0C1, Canada.
J Clin Med. 2021 Oct 15;10(20):4730. doi: 10.3390/jcm10204730.
The purpose of the present retrospective observational study was to compare the effects of treatment with Herbst appliance and fixed therapy with elastics on the condyle and glenoid fossa complex. Thirty patients aged between twelve and sixteen years with skeletal Class II malocclusion who met the inclusion criteria were included in the study: fifteen patients treated with Herbst appliance (Group 1), and fifteen patients treated with orthodontic camouflage using MBT prescription (MBT Versatile+ Appliance System) (Group 2). For Group 2, patients had CBCT scans taken before treatment either after Herbst appliance removal or at the end of treatment. CBCT scans were evaluated for changes in condyle-glenoid fossa complex using the In Vivo Dental 5.1 software. Statistical significance was set at ≤ 0.05. On inter-group comparison, the Herbst group showed statistically significant increases in the condylar height of 1.35 mm ( ≤ 0.001) on the right and 1.21 mm ( ≤ 0.01) on the left side, and a condylar volume of 111.03 mm ( ≤ 0.01) on the right and 127.80 mm ( ≤ 0.001) on the left side. The Herbst group showed anterior remodelling on the postero-superior aspect of glenoid fossa. Herbst appliance treatment induced growth at the condylar head and anterior remodelling of glenoid fossa, thereby improving the maxilla-mandibular relationship in growing skeletal Class II patients.
本回顾性观察研究的目的是比较Herbst矫治器治疗与弹性固定矫治对髁突和关节窝复合体的影响。研究纳入了30例年龄在12至16岁之间、符合纳入标准的骨性II类错 畸形患者：15例接受Herbst矫治器治疗（第1组），15例采用MBT处方进行正畸掩饰治疗（MBT多功能矫治器系统）（第2组）。对于第2组患者，在去除Herbst矫治器后或治疗结束时进行治疗前CBCT扫描。使用In Vivo Dental 5.1软件评估CBCT扫描中髁突-关节窝复合体的变化。统计学显著性设定为≤0.05。组间比较时，Herbst组右侧髁突高度统计学显著增加1.35 mm（≤0.001），左侧增加1.21 mm（≤0.01），右侧髁突体积增加111.03 mm³（≤0.01），左侧增加127.80 mm³（≤0.001）。Herbst组关节窝后上缘出现前部重塑。Herbst矫治器治疗可诱导髁突头部生长和关节窝前部重塑，从而改善生长发育期骨性II类患者的上颌-下颌关系。
