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运用牵张成骨增加颌骨骨量,再将牙移入新生牙槽骨中,成为正畸科医师不拔牙矫治牙量—骨量不调患者的新方法。本研究通过实验犬下颌骨牵张后,新生牙槽骨中牙移动的放射影像学、组织学观察及模型分析,为探讨人类正畸牙移动的最佳时机提供依据。 材料和方法 选成年雄性猎犬2只,将4个口内型骨牵张器分别安装于下颌第一磨牙与第四前磨牙间,其(牙合)方部位以磨牙铸造冠及前磨牙区夹板为支持,根方用穿通螺钉固定于颌骨内。下颌第一磨牙与第四
The use of distraction osteogenesis to increase the amount of jaw bone, and then the tooth into the nascent alveolar bone, becoming a orthodontic orthodontics do not tooth extraction orthodontic treatment of patients with a new method of bone mass adjustment. In this study, through the experimental dog canine mandibular distraction, the new tooth alveolar bone movement in the radiological imaging, histological observation and model analysis to explore the best timing of human orthodontic tooth movement provide the basis. MATERIALS AND METHODS Two adult male hound dogs were selected. Four oral distractor were installed between mandibular first molar and fourth premolar, respectively. Support, the root of the screw with a fixed in the jaw. Mandibular first molars with the fourth