The dry-hot valley of the Jinsha River is one of the typical eco-fragile areas in Southwest China, as well as a focus of revegetation study in the upper and middle reaches of the Changjiang River. Due to its extremely...The dry-hot valley of the Jinsha River is one of the typical eco-fragile areas in Southwest China, as well as a focus of revegetation study in the upper and middle reaches of the Changjiang River. Due to its extremely dry and hot climate, severely degraded vegetation and the intense soil and water loss, there are extreme difficulties in vegetation restoration in this area and no great breakthrough has ever been achieved on studies of revegetation over the last several decades. Through over ten years’ research conducted in the typical areas-the Yuanmou dry-hot valley, the authors found that the lithologic property is one of the crucial factors determining soil moisture conditions and vegetation types in the dry-hot valley, and the rainfall infiltration capability is also one of the key factors affecting the tree growth. Then the revegetation zoning based on different slopes was conducted and revegetation patterns for different zones were proposed.展开更多
目的:观察失败种植体再种植的临床效果,拟对目前关于失败种植牙处理方法进行补充。方法:回顾性分析南方医科大学口腔医院2008.2～2014.6门诊种植病人,共9例,8例Straumann Standard 4.1×10mm种植体,1例Osstem SSⅡ4.1×11.5mm...目的:观察失败种植体再种植的临床效果,拟对目前关于失败种植牙处理方法进行补充。方法:回顾性分析南方医科大学口腔医院2008.2～2014.6门诊种植病人,共9例,8例Straumann Standard 4.1×10mm种植体,1例Osstem SSⅡ4.1×11.5mm种植体。种植体植入完成修复使用1年以上,种植体明显松动,咀嚼时有疼痛感,但种植体没有外露,软组织无明显红肿,种植体周无明显溢脓。X光照片示种植体周低密度影,但无明显水平以及垂直骨缺损影像。在局部麻醉下实施失败种植体再种植手术,取出的失败种植体经过生理盐水冲洗,并用碳纤维头刮治器清理植体表面残留的死骨以及纤维组织,5例使用了水激光进行表面再清洗、消毒处理。骨缺陷部分用天博骨粉或Bio-Oss骨粉充填。结果:收集的9例松动牙种植体均完成过修复1年以上,其中,最短的已使用时间为种植修复后4.5年,最长的为9年,平均使用年限已6.5年。9例再种植的种植体中8例在3～6个月后完成修复,仅1例未实现骨整合,拔出后植入了新的植体,3个月后完成了修复,所有扭力值均达到35Ncm。X照片检查种植体周围无低密度影像。结论:失败的牙种植体再植同样可以骨整合以及完成修复行使功能,部分失败种植牙不宜简单地弃之,可通过再植入方法重新获得成功,丰富了现有对失败种植牙处理的认知。展开更多
基金Under the auspices of the National Natural Science Foundation of China (No .30470297)and theNationalBasicRe-searchProgram ofChina (973 Program)(No .2003CB415201 )
文摘The dry-hot valley of the Jinsha River is one of the typical eco-fragile areas in Southwest China, as well as a focus of revegetation study in the upper and middle reaches of the Changjiang River. Due to its extremely dry and hot climate, severely degraded vegetation and the intense soil and water loss, there are extreme difficulties in vegetation restoration in this area and no great breakthrough has ever been achieved on studies of revegetation over the last several decades. Through over ten years’ research conducted in the typical areas-the Yuanmou dry-hot valley, the authors found that the lithologic property is one of the crucial factors determining soil moisture conditions and vegetation types in the dry-hot valley, and the rainfall infiltration capability is also one of the key factors affecting the tree growth. Then the revegetation zoning based on different slopes was conducted and revegetation patterns for different zones were proposed.
文摘目的:观察失败种植体再种植的临床效果,拟对目前关于失败种植牙处理方法进行补充。方法:回顾性分析南方医科大学口腔医院2008.2～2014.6门诊种植病人,共9例,8例Straumann Standard 4.1×10mm种植体,1例Osstem SSⅡ4.1×11.5mm种植体。种植体植入完成修复使用1年以上,种植体明显松动,咀嚼时有疼痛感,但种植体没有外露,软组织无明显红肿,种植体周无明显溢脓。X光照片示种植体周低密度影,但无明显水平以及垂直骨缺损影像。在局部麻醉下实施失败种植体再种植手术,取出的失败种植体经过生理盐水冲洗,并用碳纤维头刮治器清理植体表面残留的死骨以及纤维组织,5例使用了水激光进行表面再清洗、消毒处理。骨缺陷部分用天博骨粉或Bio-Oss骨粉充填。结果:收集的9例松动牙种植体均完成过修复1年以上,其中,最短的已使用时间为种植修复后4.5年,最长的为9年,平均使用年限已6.5年。9例再种植的种植体中8例在3～6个月后完成修复,仅1例未实现骨整合,拔出后植入了新的植体,3个月后完成了修复,所有扭力值均达到35Ncm。X照片检查种植体周围无低密度影像。结论:失败的牙种植体再植同样可以骨整合以及完成修复行使功能,部分失败种植牙不宜简单地弃之,可通过再植入方法重新获得成功,丰富了现有对失败种植牙处理的认知。
