Clin Orthop Surg.  2015 Mar;7(1):62-68. 10.4055/cios.2015.7.1.62.

Total Knee Replacement Arthroplasty with Buechel and Pappas Knee: Minimum 2-Year Follow-up

Affiliations
  • 1Department of Orthopedic Surgery, Inha University School of Medicine, Incheon, Korea. Moon@inha.ac.kr

Abstract

BACKGROUND
Clinical and radiologic evaluation and analyses of the surgeries using Buechel and Pappas (B-P) knee implants.
METHODS
The study was conducted on 60 patients who underwent 94 total knee replacement arthroplasty with B-P knee implants from May 2009 to December 2010. The results were compared to the results of 41 patients who underwent 60 knee joint surgeries using NexGen-LPS implants from January 2008 to August 2009.
RESULTS
The American Knee Society score of the B-P knee group increased from an average of 66.9 (clinical score) and 65.5 (functional score) to 93.4 and 90.3, respectively; while those for the NexGen-LPS group increased from an average of 68.8 (clinical score) and 62.4 (functional score) to 86.3 and 76, respectively. The average ranges of motion of the B-P knee group and the NexGen-LPS group were 119.1degrees and 114.8degrees, respectively, before surgery and improved to 121.0degrees and 123.0degrees at final follow-up after the surgery. The visual analogue scale scores for the B-P knee group and the NexGen-LPS group improved from 4.7 and 4.6 to 1.4 and 1.8, respectively. The flexion contracture also improved from 5.1degrees and 6.3degrees to 0.64degrees and 1.72degrees. The tibio-femoral angle for the B-P knee group and the NexGen-LPS group also improved greatly after the surgery, from varus 0.34degrees and 0.73degrees each to valgus 6.7degrees and 6.9degrees, respectively.
CONCLUSIONS
The evaluation of more than 2 years of total knee replacement arthroplasty using B-P knee implants showed good results. B-P knee implants showed a relatively higher degree of satisfaction in clinical knee score and less intraoperative bone mass removal than NexGen-LPS implants.

Keyword

Buechel and Pappas knee; NexGen-LPS; Total knee arthroplasty

MeSH Terms

Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee/*instrumentation
Female
Follow-Up Studies
Humans
Knee Joint/radiography/*surgery
*Knee Prosthesis
Male
Middle Aged
Osteoarthritis, Knee/radiography/*surgery

Figure

  • Fig. 1 Liner, tibial and femoral components of Buechel and Pappas knee.

  • Fig. 2 (A) Preoperative X-ray of an osteoarthritis (OA) patient: right knee anteroposterior (AP) view shows medial joint space narrowing and varus deformity. (B) Preoperative X-ray of an OA patient: right knee lateral view. (C) Postoperative X-ray of an OA patient with Buechel and Pappas (B-P) knee implants: right knee AP view shows correction of medial joint space narrowing and varus deformity. (D) Postoperative X-ray of an OA patient with B-P knee implants: right knee lateral view.


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