Maxillary protraction and multiple loop edgewise arch wire technology in treatment of early mixed dentition skeletal class Ⅲ malocclusion / 中华医学美学美容杂志

Objective To evaluate the orthodontic effect of surgery on mixed dentition period class Ⅲ malocclusion and to investigate the effective therapeutic method of the skeletal class Ⅲ malocclusion.Methods A total of 20 patients aged 8.5 to 9.1 years with early mixed dentition class Ⅲ skeletal malocclusion.The treatment was divided into two phases.During the first phase,the entire stuffy group was treated with a bonded maxillary expansion and protraction.During the second phase,the entire study group received multiple loop edgewise arch wire (MEAW) treatment until an ideal occlusion relationship achieved.Comparison of the pre-and post-orthodontic treatment cephalometric radiographs had been done after maxillary protraction and MEAW were applied for patients.Results In the 20 patients after orthodontic treatment,Class Ⅲ skeletal facial profile was improved,the retraction of anterior teeth was obvious,and there were significant changes in dentition; the profile of soft tissue and satisfactory occlusion relationship were significantly improved,as compared with the changes between pre-treatment and post-treatment.Conclusions Skeletal Ⅲ malocclusion in early mixed dentition can be successfully treated.The results can be satisfied with improved class Ⅲ skeletal and molar relationship,high-angle and profile of soft tissue.

Difficulties and Countermeasures in Expanding Mobile Field Hospital in Earthquake Relief Mission / 医疗卫生装备

Objective To analyze and solve the difficulties in rapidly expanding the mobile field hospital in earthquake relief mission.Methods Aimed at the difficulties in the speed,advance men were sent out before the expansion.Then the personnel were regrouped in the proceeding of the expansion,and the vehicles entered the district according to the predefined area and order.Results The expanding speed was raised.Conclusion The scheme meets the requirements of the first aid in the mobile field hospital.

Clinical application of continuous rapid tissue expansion / 中华医学美学美容杂志

Objective To study a simple surgical method for continuous rapid tissue expansion and its clinical application. Methods The operation was accomplished in two-stage procedures. First, expanders were placed in the subcutaneous pocket through interlesional perpendicular short incisions. Continuous expansion by trace syringe pump began from the second day after expander placement. The speed of water injection was set according to patient's algesthesia reaction and vascularity of skin. The second operation was carried out at the third to fifth day after the expansion completed.Results The method was put into clinical practice in 22 cases (16 cases of scar, 2 cases of capillary angioma, and 4 cases of black nevus), and 35 expanders were placed. The speed of water injection was set in 0.2～0.8ml/hr/100ml.The mean time of water injection was 15.3 days. In the process of expansion, all cases were satisfactory except 1 case, in which the expander exposed in the incision. After the second operation, all flaps survived except one showing distal skin necrosis. The result was satisfactory after 3 months to 1 year follow-up. Conclusion The procedure consists of expander placement through interlesional perpendicular short incisions and continuous expansion in advance, which maximally shortens the time of expansion and hospitalization. This expansion method is a simple, safe, reliable, and ideal rapid tissue expansion technique.