Cone-beam CT Studies On Alveolar Bone Thickness In Adult Patients With Skeletal Mandibular Devation

Adult patients with skeletal mandibular devation is a common malocclusion deformity inclinical, which can lead to malocclution, the abnormality of mandibular functionalmovement, periodontal tissue damagement, temporomandibular joint disease, etc. Theperformance of dento-maxillofacial deformities in patients can be divided intotransverse,horizontal vertical asymmetric in three directions. Adult patients with skeletalmandibular devation is not only effect the beauty but also can cause different degree ofpsychological-social problems.Because of the complex clinical manifestations in mandibulardevation patients, it often need to make a comprehensive diagnosis and treatment plant inorder to correct maxillofacial deformities. The correct diagnosis is the foundation ofsuccessful treatment, accurate treatment planning is a prerequisites for successful treatment.On treatment, asymmetric growth after the stop of osseous deformity patients,orthodontic treatment alone can only get a compensatory effect, can’t completely correctosseous asymmetric deformities, combined surgical and orthodontic treatment is needed for serious mandibular deflection. Regardless of which approach is the movement of the teethare key to the success or failure of the treatment. In previous teeth in patients with osseousⅡ and Ⅲ class to compensate after more and more scholars in the study of bonereconstruction, bone reconstruction and moving tooth ratio (B/T thewire) does not complywith the1:1. And is given priority to with bone resorption, bone hyperplasia co., LTD. Andmandible deviation deformity patients because of its special clinical manifestation, namely,jaws, teeth arch asymmetry in three-dimensional directions, about dental arch asymmetry.Subsequent tooth movement range has become key factors influencing malocclusion, andpostoperative occlusal stability of premise. Tooth of the area, therefore, to understand thesepatients after the morphological characteristics of the teeth and alveolar bone, andpreoperative orthodontic to compensate local alveolar bone reconstruction and to the limitsof compensation, to guide the clinical treatments of the correct planning has an importantguiding significance to the establishment and implementation.Objective1. Adult patients with bony jaw deflection measurement by CBCT technology analysis ofmorphological characteristics of alveolar bone, and bilateral symmetry.2. Contrast before and after orthodontic tooth to compensatory osseous after partial patientswith jaw teeth alveolar bone morphology change characteristics.MethodsSelection in November2011to October2012in the fourth military medical universityaffiliated stomatological hospital orthodontic clinic of adult patients with mandible deviation,and individual normal synthetic20cases each. By CBCT scanning for cranial andmaxillofacial imaging, measurement on both sides of the bony jaw deflection on the patientswith mandibular dental area, alveolar bone after morphological characteristics, and thedifference with normal group. And compared before and after orthodontic tooth tocompensatory osseous after partial patients with jaw teeth alveolar bone morphology changecharacteristics. For statistical analysis.Result1. Adult patients with bony jaw devation deflection and deflection on the contralateral side, fang after mandibular bone gradient difference significant, oblique side slope after maxillarydental area, alveolar bone were greater than skewed to the side of the same name teeth,lateral deflection mandibular dental area, alveolar bone after the slope is skewed to the sideof the same name teeth. Skewed bilateral maxillary first fang bone grinding Angle is greaterthan100°, the tip deflection dental area, alveolar bone after maxillary buccal side to tilt,namely to the deflected side tilt; Deflection contralateral maxillary first fang bone grindingAngle is close to90°, the tip deflection of the contralateral maxillary dental area, alveolarbone after standing in the upper jaw. Mandibular first molars have significant bilateralalveolar bone inclination, lateral deflection alveolar fragments of upright, lateral deflectionon more buccal alveolar bone. Adult osteoarthritis patients with mandibular deviationhappened to the alveolar bone reconstruction of asymmetry, and the information wasconsistent with tooth deflection.2. Adult patients with bony jaw devation preoperative orthodontic alveolar bonereconstruction to compensate with the degree of tooth movement, teeth to produce therelative shift in the alveolar bone, alveolar bone shape did not change or changes very little.Tooth movement process, the biology of alveolar bone reconstruction is give priority to inorder to absorb more, and proliferation is limited.Conclusions:The alveolar bone morphology of adult osteoarthritis patients with mandibular deviationreconstruct in asymmetry,consistent with the teeth deflection of performance. Adult patientswith bony jaw devation during dental decompenstion on the preoperative orthodontics,alveolar bone reconstruction and the degree of teeth movement is inconsistent. Thebiological reconstruction of alveolar bone is mainly bone absorption.