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Comparative study of tibial posterior slope angle following cruciate-retaining total knee arthroplasty using one of three implants

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Abstract

Purpose

Pre- and postoperative tibial posterior slope angles (PSAs) were assessed in patients who underwent cruciate-retaining total knee arthroplasty (TKA).

Material and methods

A total of 386 cruciate retaining TKA were performed in 308 patients and retrospectively reviewed. Based on the prostheses, 202 cases using NexGen® were classified as group I, 120 cases using PFC sigma® as group II, and 64 cases using Vanguard® as group III. Postoperative PSA of groups I, II, and III were compared.

Results

In groups I, II, and III, postoperative PSA was 6.0˚, 6.0˚, and 4.5˚, respectively (p < 0.001). Between preoperative measurement and final follow-up examination, mean knee score (59.7 to 97.3), function score (54.2 to 90.5), and range of motion (ROM; 126.7° to 132.2°) improved. These three values did not differ significantly among groups.

Conclusions

The 3° slope of the Vanguard® polyethylene insert caused the difference in PSAs. This design characteristic should be considered when using this implant in TKA.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, South Korea

    Dae Kyung Bae, Sang Jun Song, Kyoung Ho Yoon & Seong Cheol Moon

  2. Department of Orthopaedic Surgery, National Police Hospital, Seoul, South Korea

    Jung Ho Noh

Authors
  1. Dae Kyung Bae
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  2. Sang Jun Song
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  3. Kyoung Ho Yoon
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  4. Jung Ho Noh
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Correspondence to Sang Jun Song.

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Bae, D.K., Song, S.J., Yoon, K.H. et al. Comparative study of tibial posterior slope angle following cruciate-retaining total knee arthroplasty using one of three implants. International Orthopaedics (SICOT) 36, 755–760 (2012). https://doi.org/10.1007/s00264-011-1395-3

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  • DOI: https://doi.org/10.1007/s00264-011-1395-3

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