目的探讨3D打印技术在复杂胫骨平台骨折手术中应用的可行性。方法应用3D打印技术治疗59例SchatzkerⅣ～Ⅵ型胫骨平台骨折患者。术前行膝关节三维CT重建,应用3D技术打印实体模型,在模型上进行手术设计并模拟手术,术中按术前设计手术。结...目的探讨3D打印技术在复杂胫骨平台骨折手术中应用的可行性。方法应用3D打印技术治疗59例SchatzkerⅣ～Ⅵ型胫骨平台骨折患者。术前行膝关节三维CT重建,应用3D技术打印实体模型,在模型上进行手术设计并模拟手术,术中按术前设计手术。结果患者均获得随访,时间12～24个月。患者均获得骨性愈合,无胫骨平台二次塌陷、内固定松动断裂、骨不连等并发症发生。术后第5天膝关节X线片显示解剖复位51例,移位<1 mm 5例,移位> 1 mm 3例,解剖复位率86. 4%。术后12个月根据膝关节HSS评分评价疗效:优38例,良12例,可9例,优良率为84. 7%。结论在复杂胫骨平台骨折治疗中应用3D打印技术,对手术方案进行个体化设计,指导手术操作,可有效提高骨折复位质量。展开更多
Tide gauge data from 1950 to 2015 are used to analyze sea level change, tidal change, return levels, and design tide levels under rising sea level scenarios in Bohai Bay. Results show the following: 1) Since 1950 sea ...Tide gauge data from 1950 to 2015 are used to analyze sea level change, tidal change, return levels, and design tide levels under rising sea level scenarios in Bohai Bay. Results show the following: 1) Since 1950 sea levels in Bohai Bay show a significant rising trend of 3.3 mm per year. The speed has been particularly rapid in 1980e2015 at a rate of 4.7 mm per year. 2) Astronomical tides showed a clear long-term trend in 1950e2015. The amplitude and phase lag of the M2 tide constituent decreased at a rate of 0.21 cm per year and 0.11 per year, respectively and the phase lag of K1 decreased at a rate of 0.09 per year, whereas there was little change in its amplitude. The mean high and low tides increased at a rate of 0.08 and 0.52 cm per year, respectively, whereas the mean tidal range decreased at a rate of 0.44 cm per year. Results from numerical experiments show that local sea level rise plays an important role in the tidal dynamics change in Bohai Bay. 3) It is considered that the sea level return periods will decrease owing to the influence of sea level rise and land subsidence, therefore design tide level will change in relation展开更多
文摘目的探讨3D打印技术在复杂胫骨平台骨折手术中应用的可行性。方法应用3D打印技术治疗59例SchatzkerⅣ～Ⅵ型胫骨平台骨折患者。术前行膝关节三维CT重建,应用3D技术打印实体模型,在模型上进行手术设计并模拟手术,术中按术前设计手术。结果患者均获得随访,时间12～24个月。患者均获得骨性愈合,无胫骨平台二次塌陷、内固定松动断裂、骨不连等并发症发生。术后第5天膝关节X线片显示解剖复位51例,移位<1 mm 5例,移位> 1 mm 3例,解剖复位率86. 4%。术后12个月根据膝关节HSS评分评价疗效:优38例,良12例,可9例,优良率为84. 7%。结论在复杂胫骨平台骨折治疗中应用3D打印技术,对手术方案进行个体化设计,指导手术操作,可有效提高骨折复位质量。
文摘Tide gauge data from 1950 to 2015 are used to analyze sea level change, tidal change, return levels, and design tide levels under rising sea level scenarios in Bohai Bay. Results show the following: 1) Since 1950 sea levels in Bohai Bay show a significant rising trend of 3.3 mm per year. The speed has been particularly rapid in 1980e2015 at a rate of 4.7 mm per year. 2) Astronomical tides showed a clear long-term trend in 1950e2015. The amplitude and phase lag of the M2 tide constituent decreased at a rate of 0.21 cm per year and 0.11 per year, respectively and the phase lag of K1 decreased at a rate of 0.09 per year, whereas there was little change in its amplitude. The mean high and low tides increased at a rate of 0.08 and 0.52 cm per year, respectively, whereas the mean tidal range decreased at a rate of 0.44 cm per year. Results from numerical experiments show that local sea level rise plays an important role in the tidal dynamics change in Bohai Bay. 3) It is considered that the sea level return periods will decrease owing to the influence of sea level rise and land subsidence, therefore design tide level will change in relation
