Background: Sagittal plane placement of the tibial component in total knee replacement (TKR) has important implications for maximizing the range of flexion motion, allowing collateral ligaments to function more normal...Background: Sagittal plane placement of the tibial component in total knee replacement (TKR) has important implications for maximizing the range of flexion motion, allowing collateral ligaments to function more normally, as well as providing ideal compressive loading on the tibial bone-prosthesis interface. This study attempts to quantify the normal posterior tibial slope (PTS) angle pre-operatively and post-operatively in osteoarthritic patients after using a conventional extramedullary tibial resection guide to assess its effectiveness. Methods: Forty-nine primary cementless total knee replacements in 34 osteoarthritic patients were measured radiographically pre-operatively and one year post-operatively to determine the PTS and its effect on range of motion. Lateral X-rays, using the anterior cortical line of the tibia, were employed for all measurements. Results: Pre-operative PTS measured 11.83˚ (range 5˚ - 18˚), while post-operative PTS of implanted tibial components measured 11.30o (range 4˚ - 18˚). The pre-operative range of motion of 112˚ (range 30˚ to 135˚) was improved to 119˚ (range 90˚ to 135˚) post-operatively after 1 year. Conclusions: Anterior tibial shaft referencing using a conventional extramedullary tibial resection guide provides an easy and convenient method for reproducing the anatomical PTS during TKR. This methodology provided improvement in average range of motion from 112˚ pre-operatively to 119˚ post-operatively at one year.展开更多
Purpose: To restore the normal axial alignment of the lower extremity is important in reconstructive knee surgery. The aim of this study was to evaluate lower-limb alignment and posterior tibial slope. Methods: Thirty...Purpose: To restore the normal axial alignment of the lower extremity is important in reconstructive knee surgery. The aim of this study was to evaluate lower-limb alignment and posterior tibial slope. Methods: Thirty-two male and 32 female outpatients aged 22 to 46 were recruited. A full weight-bearing anteroposterior radiograph of the entire lower limb was obtained for each subject. The axial alignment was measured based on the centers of the femoral head, knee, and ankle. The tibiofemoral (TF), tibial joint (TJ), and posterior tibial slope (TS) angles were determined. Results: The mean TF angle was more varus in women (177.8°) than men (179.2°), and the mean TJ angle was more medially inclined in women than men. Women had a greater TJ angle than men (93.3° vs. 91.6°). The mean posterior TS was greater in men than women (16.0° vs. 12.5°, p < 0.05), while the mean TS angle was greater in women (14.8°) than men (12.3°). Conclusion: Knee alignment and geometry vary among populations. In our study, the TF angle was varus among all participants. The knee joint was more medially inclined in women than men. And also the posterior TS was greater in women than men.展开更多
BACKGROUND It has been confirmed that the increased posterior tibial slope over 12 degrees is a risk factor for anterior cruciate ligament injury,and varus deformity can aggravate the progression of medial osteoarthri...BACKGROUND It has been confirmed that the increased posterior tibial slope over 12 degrees is a risk factor for anterior cruciate ligament injury,and varus deformity can aggravate the progression of medial osteoarthritis.AIM To evaluate the efficacy of modified high tibial osteotomy(HTO)and anterior cruciate ligament reconstruction(ACLR)in the treatment of anterior cruciate ligament(ACL)injuries with varus deformities and increased posterior tibial slope(PTS)based on clinical and imaging data.METHODS The patient data in this retrospective study were collected from 2019 to 2021.A total of 6 patients were diagnosed with ACL injury combined with varus deformities and increased PTS.All patients underwent modified open wedge HTO and ACLR.The degree of correction of varus deformity and the PTS was evaluated by radiography and magnetic resonance imaging.RESULTS All 6 patients(6 knee joints)were followed up for an average of 20.8±3.7 months.The average age at surgery was 29.5±3.8 years.At the last follow-up,all patients resumed competitive sports.The International Knee Documentation Committee score increased from 50.3±3.1 to 87.0±2.8,the Lysholm score increased from 43.8±4.9 to 86±3.1,and the Tegner activity level increased from 2.2±0.7 to 7.0±0.6.The average movement distance of the tibia anterior translation was 4.8±1.1 mm,medial proximal tibial angle(MPTA)was 88.9±1.3°at the last follow-up,and the PTS was 8.4±1.4°,both of which were significantly higher than those before surgery(P<0.05).CONCLUSION Modified open wedge HTO combined with ACLR can effectively treat patients with ACL ruptures with an associated increased PTS and varus deformity.The short-term effect is significant,but the long-term effect requires further follow-up.展开更多
背景:胫骨假体的后倾角是单髁置换术中的一个重要参数,目前推荐的胫骨假体后倾角度为7°,但是如何在单髁置换手术中选择合适的后倾角目前尚存在争议。目的:探讨不同胫骨后倾截骨角度对活动平台单髁关节置换术后关节活动度和功能的...背景:胫骨假体的后倾角是单髁置换术中的一个重要参数,目前推荐的胫骨假体后倾角度为7°,但是如何在单髁置换手术中选择合适的后倾角目前尚存在争议。目的:探讨不同胫骨后倾截骨角度对活动平台单髁关节置换术后关节活动度和功能的影响。方法:选取本院2012年1月1日至2015年7月1日行单髁置换术治疗的骨关节炎患者30例(30膝)。按照胫骨的后倾截骨方法不同分为两组:解剖截骨组(后倾截骨3°)和常规截骨组(后倾截骨7°),每组各15例。两组患者术前一般资料、膝关节最大伸直角度、最大屈曲角度、美国膝关节协会评分(Knee Society Score,KSS评分)差异和后倾角度数均无统计学意义(P>0.05)。比较术后两组关节最大伸直角度、最大屈曲角度、KSS评分和后倾角角度的差异。结果:所有患者均获随访,时间12~36个月,平均(18.4±5.5)个月。未发生伤口感染、假体脱位、假体松动等并发症。术后解剖截骨组和常规截骨组的后倾截骨角度分别为3.8°±1.2°和7.2°±2.2°,关节最大伸直角度分别为1.7°±0.2°和1.5°±0.1°,关节最大屈曲角度分别为119°±7.2°和122°±7.8°,KSS评分分别为(87.8±5.2)分和(81.2±4.5)分;其中两组间术后后倾截骨角度和KSS评分有统计学差异(P<0.05)。结论:单髁关节置换术中采用3°的胫骨解剖后倾截骨有利于提高患者术后的关节功能。展开更多
文摘Background: Sagittal plane placement of the tibial component in total knee replacement (TKR) has important implications for maximizing the range of flexion motion, allowing collateral ligaments to function more normally, as well as providing ideal compressive loading on the tibial bone-prosthesis interface. This study attempts to quantify the normal posterior tibial slope (PTS) angle pre-operatively and post-operatively in osteoarthritic patients after using a conventional extramedullary tibial resection guide to assess its effectiveness. Methods: Forty-nine primary cementless total knee replacements in 34 osteoarthritic patients were measured radiographically pre-operatively and one year post-operatively to determine the PTS and its effect on range of motion. Lateral X-rays, using the anterior cortical line of the tibia, were employed for all measurements. Results: Pre-operative PTS measured 11.83˚ (range 5˚ - 18˚), while post-operative PTS of implanted tibial components measured 11.30o (range 4˚ - 18˚). The pre-operative range of motion of 112˚ (range 30˚ to 135˚) was improved to 119˚ (range 90˚ to 135˚) post-operatively after 1 year. Conclusions: Anterior tibial shaft referencing using a conventional extramedullary tibial resection guide provides an easy and convenient method for reproducing the anatomical PTS during TKR. This methodology provided improvement in average range of motion from 112˚ pre-operatively to 119˚ post-operatively at one year.
文摘Purpose: To restore the normal axial alignment of the lower extremity is important in reconstructive knee surgery. The aim of this study was to evaluate lower-limb alignment and posterior tibial slope. Methods: Thirty-two male and 32 female outpatients aged 22 to 46 were recruited. A full weight-bearing anteroposterior radiograph of the entire lower limb was obtained for each subject. The axial alignment was measured based on the centers of the femoral head, knee, and ankle. The tibiofemoral (TF), tibial joint (TJ), and posterior tibial slope (TS) angles were determined. Results: The mean TF angle was more varus in women (177.8°) than men (179.2°), and the mean TJ angle was more medially inclined in women than men. Women had a greater TJ angle than men (93.3° vs. 91.6°). The mean posterior TS was greater in men than women (16.0° vs. 12.5°, p < 0.05), while the mean TS angle was greater in women (14.8°) than men (12.3°). Conclusion: Knee alignment and geometry vary among populations. In our study, the TF angle was varus among all participants. The knee joint was more medially inclined in women than men. And also the posterior TS was greater in women than men.
文摘BACKGROUND It has been confirmed that the increased posterior tibial slope over 12 degrees is a risk factor for anterior cruciate ligament injury,and varus deformity can aggravate the progression of medial osteoarthritis.AIM To evaluate the efficacy of modified high tibial osteotomy(HTO)and anterior cruciate ligament reconstruction(ACLR)in the treatment of anterior cruciate ligament(ACL)injuries with varus deformities and increased posterior tibial slope(PTS)based on clinical and imaging data.METHODS The patient data in this retrospective study were collected from 2019 to 2021.A total of 6 patients were diagnosed with ACL injury combined with varus deformities and increased PTS.All patients underwent modified open wedge HTO and ACLR.The degree of correction of varus deformity and the PTS was evaluated by radiography and magnetic resonance imaging.RESULTS All 6 patients(6 knee joints)were followed up for an average of 20.8±3.7 months.The average age at surgery was 29.5±3.8 years.At the last follow-up,all patients resumed competitive sports.The International Knee Documentation Committee score increased from 50.3±3.1 to 87.0±2.8,the Lysholm score increased from 43.8±4.9 to 86±3.1,and the Tegner activity level increased from 2.2±0.7 to 7.0±0.6.The average movement distance of the tibia anterior translation was 4.8±1.1 mm,medial proximal tibial angle(MPTA)was 88.9±1.3°at the last follow-up,and the PTS was 8.4±1.4°,both of which were significantly higher than those before surgery(P<0.05).CONCLUSION Modified open wedge HTO combined with ACLR can effectively treat patients with ACL ruptures with an associated increased PTS and varus deformity.The short-term effect is significant,but the long-term effect requires further follow-up.
文摘背景:胫骨假体的后倾角是单髁置换术中的一个重要参数,目前推荐的胫骨假体后倾角度为7°,但是如何在单髁置换手术中选择合适的后倾角目前尚存在争议。目的:探讨不同胫骨后倾截骨角度对活动平台单髁关节置换术后关节活动度和功能的影响。方法:选取本院2012年1月1日至2015年7月1日行单髁置换术治疗的骨关节炎患者30例(30膝)。按照胫骨的后倾截骨方法不同分为两组:解剖截骨组(后倾截骨3°)和常规截骨组(后倾截骨7°),每组各15例。两组患者术前一般资料、膝关节最大伸直角度、最大屈曲角度、美国膝关节协会评分(Knee Society Score,KSS评分)差异和后倾角度数均无统计学意义(P>0.05)。比较术后两组关节最大伸直角度、最大屈曲角度、KSS评分和后倾角角度的差异。结果:所有患者均获随访,时间12~36个月,平均(18.4±5.5)个月。未发生伤口感染、假体脱位、假体松动等并发症。术后解剖截骨组和常规截骨组的后倾截骨角度分别为3.8°±1.2°和7.2°±2.2°,关节最大伸直角度分别为1.7°±0.2°和1.5°±0.1°,关节最大屈曲角度分别为119°±7.2°和122°±7.8°,KSS评分分别为(87.8±5.2)分和(81.2±4.5)分;其中两组间术后后倾截骨角度和KSS评分有统计学差异(P<0.05)。结论:单髁关节置换术中采用3°的胫骨解剖后倾截骨有利于提高患者术后的关节功能。
