Medial Tibial Reduction Osteotomy is Associated with Excellent Outcomes and Improved Coronal Alignment

Authors

  • J. Ryan Martin Colorado Joint Replacement, Denver, Colorado
  • Daniel Levy Colorado Joint Replacement, Denver, Colorado
  • Todd Miner Colorado Joint Replacement, Denver, Colorado
  • David Conrad Thedacare Orthopedics, Appleton, WI
  • Jason Jennings Colorado Joint Replacement, Denver, Colorado
  • Douglas Dennis Colorado Joint Replacement

DOI:

https://doi.org/10.15438/rr.7.1.166

Keywords:

varus deformity, medial release, total knee replacement, alignment, stability

Abstract

Background: The medial tibial reduction osteotomy (MTRO) was introduced to achieve coronal ligamentous balance in total knee arthroplasty (TKA) patients with substantial preoperative varus deformity. Limited data exists on the outcomes of patients requiring an MTRO. This study compares outcomes of a matched cohort of patients that either required or did not require an MTRO during TKA.

Methods: A retrospective review was performed on 67 patients that underwent an MTRO during primary TKA to achieve coronal balance. This patient population was matched 1:1 to another cohort of TKA patients by age, gender, and BMI that did not require an MTRO. A clinical and radiographic evaluation was utilized to compare the two cohorts.

Results: Preoperatively, the tibiofemoral angle was 3.42° valgus versus 6.12° varus in the control and MTRO cohorts respectively (p=0.01). Mean postoperative tibiofemoral angles were 3.40° versus 2.43° valgus respectively. Postoperative Knee Society Scores were superior in the MTRO cohort (183.84 versus 174.58; p=0.04). Intraoperatively, no superficial MCL releases were required to achieve coronal balance in either cohort. Complications were similar and limited in both groups.  Medial tibial bone resorption was observed in 64% of MTRO subjects averaging 2.02mm versus only 0.3mm in the control cohort ( p=0.01).

Conclusion: Patients requiring an MTRO achieved similar alignment and superior knee scores compared to a control cohort with less varus deformity. This procedure eliminated the need for release of the superficial MCL.  Resorption of medial tibial bone was commonly observed, possibly secondary to saw-induced thermal necrosis associated with performing an MTRO.

Author Biographies

J. Ryan Martin, Colorado Joint Replacement, Denver, Colorado

MD

Daniel Levy, Colorado Joint Replacement, Denver, Colorado

BS

Todd Miner, Colorado Joint Replacement, Denver, Colorado

MD

David Conrad, Thedacare Orthopedics, Appleton, WI

MD

Jason Jennings, Colorado Joint Replacement, Denver, Colorado

MD, DPT

Douglas Dennis, Colorado Joint Replacement

MD

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Published

2017-04-17

How to Cite

Martin, J. R., Levy, D., Miner, T., Conrad, D., Jennings, J., & Dennis, D. (2017). Medial Tibial Reduction Osteotomy is Associated with Excellent Outcomes and Improved Coronal Alignment. Reconstructive Review, 7(1). https://doi.org/10.15438/rr.7.1.166

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Section

Original Article

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