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  • Title: [A new technique determining tibial rotational alignment in total knee arthroplasty].
    Author: Xiao Y, Zhang F, Yu J, Kan S.
    Journal: Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi; 2008 Jan; 22(1):26-8. PubMed ID: 18361231.
    Abstract:
    OBJECTIVE: To compare the two different techniques determining tibial rotational alignment in total knee arthroplasty (TKA) to enhance postoperative effect and reduce complications. METHODS: From May 2006 to April 2007, 60 patients (27 males, 33 females, aged 55-78 years) received TKA and randomly divided into 2 groups (n=30): tibial rotational alignment in TKA was determined by medical 1/3 of tibial tubercle in Group A, by medial border of tibial tubercle at 0-9 degrees varus in Group B, by medical 1/3 of tibial tubercle at 20 degrees or greater varus or by the mean line between medial border of tibial tubercle and medical 1/3 of tibial tubercle at 10-19 degrees varus. The angle of rotation of polyethylene cushion was calculated. RESULTS: The angle of rotation of polyethylene cushion in Group A was (8.4+/-3.8) degrees at 0-9 degrees varus, (3.5+/-2.7) degrees at 10-19 degrees varus and (0+/-2.4) degrees at 20 degrees varus or over, respectively, and there was significant difference (P<0.05). The angle of rotation of polyethylene cushion in Group B was (0+/-2.1) degrees at 0-9 degrees varus, (0+/-2.0) degrees at 10-19 degrees varus and (0+/-1.7) degrees at 20 degrees varus or over, respectively, and there was no significant difference (P>0.05). The angle of rotation of polyethylene cushion averaged (5.6+/-2.8) degrees in Group A and (0+/-1.9) degrees in Group B, showing significant difference (P<0.05). CONCLUSION: The range of ideal tibial rotational alignment in TKA was from medial border of the tibial tubercle to medical 1/3 of the tibial tubercle, and is decided by the degree of varus deformities and valgus deformities.
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