J Korean Orthop Assoc.  2009 Apr;44(2):180-185.

A Comparison of the Functional Results of High-Flex Total Knee Arthroplasty: LPS-Flex vs. Scorpio-Flex TKA

Affiliations
  • 1Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. hacw@skku.edu

Abstract

PURPOSE
This study compared the clinical and functional results of LPS-Flex with those of Scorpio-Flex TKA. MATERIALS AND METHODS: Fifty cases of High-Flex TKA (24 LPS-Flex and 26 Scorpio-Flex) were analyzed retrospectively. All the procedures were performed during the same period by the senior author and the patients were followed-up for more than 5 years. A functional evaluation was performed by a questionnaire on the high flexion-related activities, including cross-leg sitting, squatting, standing from the floor, standing from a chair and ascending and descending stairs. Each function was classified by the patients into five grades. The clinical evaluation included the range of motion, the Knee Society Knee Score and Function Score (KSKS & KSFS), the WOMAC score and the patient's satisfaction score. RESULTS: The functional evaluation showed a better result in the LPS-Flex group for the cross-leg sitting function (p=0.039) but there was no difference in the other functions. The clinical evaluation showed more flexion in the LPS-Flex group than that in the Scorpio-Flex group (p=0.044) but there were no difference in the KSKS, KSFS, WOMAC score and the patient's satisfaction score. CONCLUSION: LPS-Flex TKA showed better functional results for cross-leg sitting than did Scorpio-Flex TKA. This difference was attributed to the LPS-Flex group having more flexion than that of in the Scorpio-Flex group.

Keyword

Total knee arthroplasty; High-Flex; LPS-Flex; Scorpio-Flex

MeSH Terms

Floors and Floorcoverings
Humans
Knee
Surveys and Questionnaires
Range of Motion, Articular
Retrospective Studies

Reference

1. Anouchi YS, McShane M, Kelly F Jr, Elting J, Stiehl J. Range of motion in total knee replacement. Clin Orthop Relat Res. 1996. 331:87–92.
Article
2. Banks S, Bellemans J, Nozaki H, Whiteside LA, Harman M, Hodge WA. Knee motions during maximum flexion in fixed and mobile-bearing arthroplasties. Clin Orthop Relat Res. 2003. 410:131–138.
Article
3. Bellemans J, Banks S, Victor J, Vandenneucker H, Moemans A. Fluoroscopic analysis of the kinematics of deep flexion in total knee arthroplasty. Influence of posterior condylar offset. J Bone Joint Surg Br. 2002. 84:50–53.
4. Bin SI, Nam TS. Early results of high-flex total knee arthroplasty: comparison study at 1 year after surgery. Knee Surg Sports Traumatol Arthrosc. 2007. 15:350–355.
5. Choi CH, Kim KW, Sung IH, Park YS. Patient satisfaction interviews after TKA successful rehabilitation achieved and functions still desired by respondents. J Korean Knee Soc. 2006. 18:20–25.
6. Dennis DA. A stepwise approach to revision total knee arthroplasty. J Arthroplasty. 2007. 22(4):Suppl 1. S32–S38.
Article
7. Goldstein WM, Raab DJ, Gleason TF, Branson JJ, Berland K. Why posterior cruciate-retaining and substituting total knee replacements have similar ranges of motion. The importance of posterior condylar offset and cleanout of posterior condylar space. J Bone Joint Surg Am. 2006. 88:Suppl 4. S182–S188.
8. Hefzy MS, Kelly BP, Cooke TD, al-Baddah AM, Harrison L. Knee kinematics in-vivo of kneeling in deep flexion examined by bi-planar radiographs. Biomed Sci Instrum. 1997. 33:453–458.
9. Huang HT, Su JY, Wang GJ. The early results of high-flex total knee arthroplasty: a minimum of 2 years of follow-up. J Arthroplasty. 2005. 20:674–679.
Article
10. Kurosaka M, Yoshiya S, Mizuno K, Yamamoto T. Maximizing flexion after total knee arthroplasty: the need and the pitfalls. J Arthroplasty. 2002. 17(4):Suppl 1. S59–S62.
Article
11. Lizaur A, Marco L, Cebrian R. Preoperative factors influencing the range of movement after total knee arthroplasty for severe osteoarthritis. J Bone Joint Surg Br. 1997. 79:626–629.
Article
12. Mihalko W, Fishkin Z, Krackow K. Patellofemoral overstuff and its relationship to flexion after total knee arthroplasty. Clin Orthop Relat Res. 2006. 449:283–287.
Article
13. Ritter MA, Harty LD, Davis KE, Meding JB, Berend ME. Predicting range of motion after total knee arthroplasty. Clustering, log-linear regression, and regression tree analysis. J Bone Joint Surg Am. 2003. 85:1278–1285.
14. Schurman DJ, Parker JN, Ornstein D. Total condylar knee replacement. A study of factors influencing range of motion as late as two years after arthroplasty. J Bone Joint Surg Am. 1985. 67:1006–1014.
Article
15. Seyler TM, Mont MA, Ragland PS, Kachwala MM, Delanois RE. Sports activity after total hip and knee arthroplasty: specific recommendations concerning tennis. Sports Med. 2006. 36:571–583.
16. Yamazaki J, Ishigami S, Nagashima M, Yoshino S. Hy-Flex II total knee system and range of motion. Arch Orthop Trauma Surg. 2002. 122:156–160.
Article
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