颧上颌骨复合体骨折内固定58例临床总结

目的:总结经上颌前庭沟入路进行眶下缘固定同时联合眉弓外侧、耳颞切口入路治疗颧上颌骨复合体骨折的临床经验。方法:回顾性分析2014-01—2016-01期间福建医科大学附属第一医院口腔颌面外科经CT检查确诊为颧上颌复合体骨折的病例资料,共58例分析临床表现、手术入路、预后及随访6个月的愈合情况。结果:本组中所有病例经过上颌前庭沟、眉弓外侧切口、耳颞切口联合入路进行手术治疗后,均获得满意的治疗效果。随访6个月,2例出现伤口感染,换药后痊愈;3例出现面神经颞支暂时性损伤,术后3个月左右全部恢复正常。所有患者面部外形对称,无张口受限。结论:经上颌前庭沟切口进行眶下缘内固定并联合眉弓外侧、耳颞切口治疗颧上颌复合体骨折的方法是治疗此类疾病的良好方法,在达到良好治疗效果的同时,又可避免睑缘下切口导致的睑外翻和瘢痕等并发症,值得在临床上推广。

Optimization of measurement distance of (109)~Cd K XRF system for obese subjects

The precision of results obtained from the ^109Cd K XRF in vivo measurement system of bone lead for obses subjects with high BMI( body mass index)was poor.The main factor affecting the precision was the distance between tibia and detector.Compared with the standard phantom,a large phantom was used to simulate the obese subject in the measurements at different distances to the detector.The counts of Compton scattering increased highly because of the tissue overlying and surrounding tibia of the obese subject.When the distance between leg and detector was too small,the instrument would produce the distorted X-ray spectra,so that the obtained data were inaccurate,In order to ensure good measuremtn precision and accuracy,the distance between leg and detector should be maintained at 25mm during the counting period.Meanwhile,the dead time displayed instantly on the instrument should be controlled to around 30%.

人工井壁涂覆砂材料抗冲刷性能研究

为研究人工井壁涂覆砂材料抗冲刷性能,研制了由冲刷泵、耐冲刷测试系统、过滤及水箱模块、上覆压力自动加载模块及数据采集控制模块构成的冲刷试验装置,利用该试验装置对人工井壁涂覆砂材料固结岩心开展了不同冲刷排量、冲刷压差及冲刷时间的冲刷破坏试验,分析了固结岩心冲刷后的表观形貌、冲刷率以及单轴抗压强度的变化情况,结果表明:固结岩心受冲刷作用后,入口端的冲蚀破坏程度要高于出口端,抗压强度保留率仅为原来的67.96%,冲刷排量为25 L·min^(-1)时,冲刷过程仅维持了4 h。冲刷破坏试验表明,即使是人工井壁涂覆砂材料的抗压强度能够满足行业标准的技术要求,但仍尚宜检测其抗冲刷性。