Craniofacial Features of Adolescent Skeletal Type-II High-Angle Disease and the Clinical Effect of Implants Anchorage Combined with MBT Orthodontic Technique
WANG Hongyu, DONG Shitao, et al
The Stomatology Hospital of Chengde, Hebei Chengde 067000, China
Abstract：Objective: To explore the craniofacial features of adolescent skeletal type-II high-angle disease and the clinical effect of implants anchorage combined with MBT orthodontic technique. Methods: A total of 70 adolescents with skeletal type-II high-angle disease who were treated in the hospital from January 2015 to January 2018were enrolled. The adolescents were divided into combination group (30 cases) and control group (30 cases) by random number table method. The combination group was treated with implants anchorage combined with MBT straight wire orthodontics, while control group was treated with MBT straight wire orthodontics combined with non-implant anchorage. The total response rate of surgery, differences in molar displacements, convex distance and inclination angle of maxillary central teeth before and after surgery were compared between the two groups. The occurrence of complications such as root absorption and periodontal lesions during treatment in both groups was statistically analyzed. Results: X-rays head positioning analysis showed that ALFH/PLFH, U1-L1/N-Me, ANS-U1/N-Me and Me-l1/N-Me in vertical direction in high-angle disease group were greater than normal values, soft tissue nasolabial angle (Cm-SN-Ls) amd H2 angle (NB-PgLs) were greater than normal values (P<0.05). The total response rate of surgery in combination group was higher than that in control group, while incidence of complications during treatment was lower than that in control group (P<0.05). After treatment, differences of molar displacements in combination group were less than those in control group, while difference in convex distance and inclination angle of maxillary central teeth were greater than those in control group (P<0.05). Conclusion: Craniofacial features of adolescent skeletal type-II high-angle disease include maxillary protrusion and mandibular retraction. The effective rate of implants anchorage combined with MBT orthodontic technique is high in treatment of adolescent skeletal type-II high-angle disease, which can reduce incidence of postoperative complications.
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2021, Vol. 27 
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