过氧化脲治疗四环素牙的远期疗效

目的评价10％过氧化睬凝胶漂白剂家庭漂白（In-home bleaching）治疗四环素牙的远期临床效果。方法用含10％过氧化脲的凝胶漂白剂。通过可由患者自行取戴的漂白托盘治疗四环素牙，观察其脱色效果及牙色复原等变化情况。结果306例四环素牙患者漂白总满意率为86．6％；随访6个月的201例中，有14．9％于6个月后出现不同程度的颜色复原。1～2年后，仍有较高的满意率。其中30例。每隔2年做1次巩固治疗。随访11年临床效果良好。结论10％过氧化脲凝胶漂白剂治疗四环素牙是有效的方法，着色度越轻治疗效果越好，着色度越重治疗效果越差。同时，漂白治疗具有一定的复原性，坚持巩固治疗。远期效果令人满意。     

等距和非等距前交叉韧带重建的对比实验

目的 观察等距和非等距前交叉韧带(anterior cruciate ligament，ACL)重建对膝关节功能的影响。方法 采用新鲜尸体观察等距ACL的解剖结构，在尸体和模型上重建等距和非等距ACL，分别观察重建后ACL长度和胫骨平台表面压强的变化。结果 等距ACL的重建在膝关节的全范围活动中长度的变化值最小，胫骨平台所受的压强也最小。结论 只有等距的ACI。的重建才能恢复膝关节的正常生理功能，而非等距重建的ACL会造成膝关节的不稳定(或活动受限)，或者使膝关节表面的压强增加。     

颈前路植骨钢板内固定治疗创伤性枢椎前滑移

目的 评价C2、C3椎体间植骨、钢板内固定治疗创伤性枢椎前滑移的临床价值。方法 8例创伤性枢椎前滑移患行颈前路手术复位、椎间盘切除减压、自体髂骨植骨、钢板内固定术，平均随访1年，观察患术后颈椎生理高度、曲度重建和颈椎稳定性、运动情况。结果 8例患均获得完全的枢椎复位，C2、C3椎体在术后16周达到骨性融合，颈椎生理高度、曲度得以重建，旋转、屈伸功能良好，无钢板螺钉并发症。结论 颈前路钢板内固定是治疗创伤性枢椎前滑移的有效方法。     

腹腔镜辅助与小切口技术行前路L4/5椎间融合术的比较

目的:评价腹腔镜辅助与小切口技术在前路腰椎间融合术中的应用价值。方法:1998年4月～2005年1月行L4/5前路腰椎间融合术52例,腹腔镜辅助下前路椎间融合手术23例(A组),其中男13例,女10例,平均年龄37.9±1.8岁;腰椎滑脱症14例,退变性椎间盘疾患4例,腰椎术后综合征5例。小切口经腹膜后前路椎间融合手术29例(B组),其中男16例,女13例,平均年龄37.4±1.6岁;腰椎滑脱症21例,退变性椎间盘疾患3例,腰椎术后综合征5例。对两组患者围手术期参数和并发症进行统计学分析比较。结果:A组与B组分别平均随访23.5个月和21.2个月,两组临床优良率、椎间高度维持和植骨融合率均无显著性差异(P>0.05),A组手术准备和操作时间明显长于B组(P<0.05),其住院时间、术中出血量与小切口组无统计学差异(P>0.05)。并发症:A组4例,发生率17.4%;B组3例,发生率10.3%,两组有显著性差异((P<0.05)。结论:应用腹腔镜辅助和小切口技术进行L4/5椎间融合都可以达到良好的临床治疗效果,但从并发症和技术上分析,采用小切口经腹膜后行L4/5椎间融合更为合理和微创,操作方便、快捷,不需特殊设备。     

CT定位及多靶点组合治疗强迫症临床研究

目的 研究多靶点组合对强迫症的治疗作用.方法 采用立体定向方法,运用CT定位和多靶点组合,射频热凝治疗强迫症例.采用Yale-Brown强迫症量表、Hamilton抑郁、焦虑量表对照评估.结果 42例强迫症中显效 25 例,进步 12 例.结论 双侧扣带回 双侧内囊前肢多靶点组合治疗难治性精神病的强迫症有明显的治疗作用.     

胫前动脉皮瓣逆行转移修复前足皮肤缺损

目的 探讨胫前动脉皮瓣逆行转移修复前足皮肤缺损的可行性。方法 以胫前动脉皮支穿出点为中心的逆行皮瓣修复前足皮肤缺损,胫前供区直接缝合或用腹股沟全厚皮打包植皮。结果 7例胫前动脉皮瓣及植皮全部成活。6例随访2～24个月,平均16个月,皮瓣无明显臃肿,色泽良好,外形满意。结论 胫前动脉皮瓣逆行转移修复前足缺损可行,取材方便、操作安全。     

Calretinin is differentially localized in magnocellular oxytocin neurons of the rat hypothalamus. A double-labeling immunofluorescence study

By use of a double-labeling immunofluorescence method with a confocal laser scanning microscope, we have examined whether a calcium-binding protein, calretinin, is localized in magnocellular oxytocin and vasopressin neurons of the rat hypothalamus. In the supraoptic nucleus, all oxytocin-labeled cells were stained for calretinin. However, in the magnocellular part of the paraventricular nucleus, almost all oxytocin-stained cells were devoid of calretinin immunoreactivity. All vasopressin-positive cells of both the supraoptic nucleus and the magnocellular part of the paraventricular nucleus lacked calretinin immunoreactivity. No calretinin immunoreactivity was found in oxytocin-labeled cells of the the anterior commissural nucleus or in vasopressin-labeled cells of the suprachiasmatic nucleus. We previously showed that another calcium-binding protein, calbindin-D28k, was localized in magnocellular oxytocin neurons of the supraoptic nucleus but not in those of the paraventricular nucleus. These findings suggest that, in general, magnocellular oxytocin neurons of the supraoptic nucleus and those of the paraventricular nucleus can be chemically distinguished, that is, the former contain both calretinin and calbindin-D28k but the latter lack the two calcium-binding proteins.     

An ultrastructural study on anterior cruciate ligament reconstruction using autogenous patellar tendon grafts in dogs

An ultrastructural study was undertaken concerning morphological changes within the autografted patellar tendon (PT) after being transplanted to the anterior cruciate ligament (ACL) in mongrel dogs. After 4 weeks, the arrangements of both large and small collagen fibrils in the PT graft became disordered, and the number of inflammatory cells increased. However, the same PT grafts revealed postsurgical signs of newly-produced collagen fibrils around activated fibroblasts at 12 to 24 weeks. At 52 weeks after the transplantation, small collagen fibrils increased in both number and density, showing a remarkable morphological similarity to the collagen fibrils of normal ACL. These data indicate that the characteristics of the PT graft eventually resemble those of a normal ACL. This paper was presented in part at the Combined Meeting of the Orthopedic Research Societies of the USA, Japan and Canada in Banff, Alberta, Canada, October, 1991.     

Uveal effusion syndrome complicated by anterior ischemic optic neuropathy

We report on a case of idiopathic uveal effusion syndrome complicated by AION. To our knowledge such an association hasn't been previously described. We suggest that scleral thickening caused obstruction of vortex veins followed by uveal effusion and compression of posterior ciliary arteries within their intrascleral tract, leading to AION. Nevertheless it can't be excluded that AION was the result of mechanical compression on ciliary vessels of optic disc by choroidal detachment.     

The anterior inferior cerebellar arterial network supplying the rat cochlea and its role in autoregulation of cochlear blood flow

Summary The sensitivity of the cochlea is dependent upon maintenance of a delicate homeostatic environment. One mechanism which participates in providing this environment is the autoregulation of cochlear blood flow. This autoregulation is ensured through the interaction of sympathetic, peptidergic and hemodynamic mechanisms. The current study demonstrates an adaptation that also participates in cochlear blood flow autoregulation. Specifically, an anterior inferior cerebellar arterial network is described and the relative contributions of each of its vessels to total cochlear blood flow is measured using laser Doppler flowmetry. The results show that each collateral vessel contributes to the blood supply of the cochlea and that reperfusion is accompanied by hyperemia. These findings suggest an adaptation that provides stable blood flow through redundancy and compensatory potential. Additionally, these observations have implications for experimental models of ischemia.