Comparative Study of the Postoperative Maximal Flexion Angle in PCL-substituting TKAs - Conventional PS vs. High-flex PS -

Choong-Hyeok Choi; Min-Hoi Koo; Yong-Wook Park

doi:10.4055/jkoa.2009.44.6.581

Journal List > J Korean Orthop Assoc > v.44(6) > 1012950

Go to TopGo to Top Go to BottomGo to Bottom

TOOLS

Choi, Koo, and Park: Comparative Study of the Postoperative Maximal Flexion Angle in PCL-substituting TKAs - Conventional PS vs. High-flex PS -

Original Article

Journal of the Korean Orthopaedic Association

Journal of the Korean Orthopaedic Association 2009; 44(6): 581-585.

Published online: 21 December 2009

DOI: https://doi.org/10.4055/jkoa.2009.44.6.581

Comparative Study of the Postoperative Maximal Flexion Angle in PCL-substituting TKAs - Conventional PS vs. High-flex PS -

Choong-Hyeok Choi, M.D., Min-Hoi Koo, M.D., Yong-Wook Park, M.D.

Department of Orthopedic Surgery, College of Medicine, Hanyang University, Seoul, Korea.

Correspondence to Choong-Hyeok Choi, M.D. Department of Orthopaedic Surgery, College of Medicine, Hanyang University, 17, Haengdang-dong, Seongdong-gu, Seoul 133-792, Korea. Tel: +82.2-2290-8483, 8485, Fax: +82.2-2299-3774, chhchoi@hanyang.ac.kr

Received 2 December 2008 Accepted 28 October 2009

Abstract

Purpose

This study was performed to compare the postoperative maximal flexion angle (MFA) of standard PCL-substituting (PS) prosthesis with that of high-flexion PS prosthesis after total knee arthroplasty (TKA).

Materials and Methods

A total of 81 patients (133 knees) were enrolled in this study. Sixty-eight primary bilateral TKAs were performed in 34 consecutive patients. The bilateral TKAs were performed in a staged sequential manner, with a standard PS prosthesis in one knee and a high-flexion PS prosthesis in the contralateral knee. We also analyzed the results of another 47 patients as several control groups, and this consisted of standard or high-flexion PS total knee prostheses in the bilateral TKAs, and standard or high-flexion PS total knee prostheses in the unilateral TKAs. The patients were clinically assessed with the Knee Society scoring system and the MFA was measured with a goniometer.

Results

At the last follow up, the mean postoperative MFA of the 34 patients operated with the combination of different prostheses was 131.6±10.4° for high-flexion prosthesis side and 131.6±9.5° for standard prosthesis side respectively. There was no statistically significant difference. On comparing with the results of the 47 patients in the control group, no statistically significant difference in the mean postoperative MFA was found between the groups.

Conclusion

We found no significant differences between the high-flexion PS prosthesis and the standard PS prosthesis in the postoperative MFA.

Keywords: Knee, Total knee arthroplasty, High-flexion implant, Maximal flexion angle

Figures and Tables

Table 1

Description of the Five Groups

Table 2

The Maximal Flexion Angle in Five Groups

Table 3

Clinical Results by Knee Society Scoring System

References

1. Bin SI, Nam TS. Early results of high-flex total knee arthroplasty: comparison study at 1 year after surgery. Knee Surg Sports Traumatol Arthros. 2007. 15:350–355.

2. Cho SH, Ha YC, Song HR, et al. High Flex Knee Arthroplasty and Range of Motion. J Korean Orthop Assoc. 2004. 39:662–667.

3. Dennis DA, Komistek RD, Scuderi GR, Zingde S. Factors affecting flexion after total knee arthroplasty. Clin Orthop Relat Res. 2007. 464:53–60.

4. Jung WH, Ha YC, Lee JS. Range of motion after high-flexion posterior stabilized total knee arthroplasty: minimum 3-year follow up. J Korean Orthop Assoc. 2007. 42:64–70.

5. Kim YH, Sohn KS, Kim JS. Range of motion of standard and high-flexion posterior stabilized total knee prostheses. A prospective, randomized study. J Bone Joint Surg Am. 2005. 87:1470–1475.

6. Ng FY, Wong HL, Yau WP, Chiu KY, Tang WM. Comparison of range of motion after standard and high-flexion posterior stabilized total knee replacement. Int Orthop. 2008. 32:795–798.

7. 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.

8. Insall JN, Hood RW, Flawn LB, Sullivan DJ. The total condylar knee prosthesis in gonarthrosis. A five to nine-year follow-up of the first one hundred consecutive replacements. J Bone Joint Surg Am. 1983. 65:619–628.

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.

10. Nutton RW, van der Linden ML, Rowe PJ, Gaston P, Wade FA. A prospective randomised double-blind study of functional outcome and range of flexion following total knee replacement with the NexGen standard and high flexion components. J Bone Joint Surg Br. 2008. 90:37–42.

TOOLS

Similar articles