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患者女,14岁。4周前因车祸致下颌骨骨折在当地医院治疗,此次因上下牙对位不好而就诊。局部检查:颜面下1/3较长,前牙开(牙合)约1.5cm,后牙正锁(牙合)。X线片示下颌骨左侧颏孔区斜行骨折,后段骨折断端向上内错位,前段向下后方错位。当即用带钩的牙弓夹板固定于上、下颌牙齿,作颌间牵引复位,5日后咬(牙合)关系完全恢复正常,4周后解除固定,(牙合)关系正常,X线示下颌骨骨折端对位良好。 讨论:以往认为颌骨骨折应在伤后1周内行复位固定,否则断端有纤维骨痂形成,纠正困难。本例错位已4周,采用颌间牵引治疗仍获得满意效果。我们认为骨折4周左右骨折断端骨痂形成尚少,且
Female patient, 14 years old. Four weeks ago, a mandibular fracture caused by a car accident was treated in a local hospital. The treatment was not good for the upper and lower teeth. Local examination: the lower face 1/3 longer, the anterior teeth open (occlusal) about 1.5cm, the posterior teeth are locked (occlusion). X-ray film shows the mandibular left lingual foramina midline fracture, the posterior segment of the fracture end upward dislocation, the anterior segment down posterior dislocation. Immediately with a hook with a dental arch clamp fixed to the upper and lower jaw teeth for intermaxillary traction reduction, 5 days after the bite occlusion completely restored to normal, 4 weeks after the lifting of the fixed, (occlusion) normal, X-ray shows the jaw Good bone fracture alignment. Discussion: In the past that the jaw fracture should be reset within 1 week after injury fixation, or stump fiber callus formation, to correct difficulties. Misplacement in this case has been 4 weeks, the use of intermaxillary traction treatment is still satisfactory results. We believe that fractures around the fracture 4 weeks fracture callus formation is still small, and