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[Triple osteotomy (modified Tönnis method) for advanced coxarthrosis]

T Ohmura1, Y Ohneda, S Tamai

  • 1Department of Orthopedic Surgery, Nara Medical University, Japan.

Nihon Seikeigeka Gakkai Zasshi
|December 1, 1995
PubMed
Summary

Triple osteotomy using a modified Tönnis method significantly improved hip function in advanced coxarthrosis patients. Postoperative results showed a notable increase in the Japanese Orthopaedic Association Hip Score and favorable radiographic outcomes.

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Area of Science:

  • Orthopedic Surgery
  • Hip Reconstruction
  • Joint Preservation

Background:

  • Advanced coxarthrosis presents significant challenges in hip joint management.
  • Acetabular rotational osteotomy is a surgical option for hip joint preservation.

Purpose of the Study:

  • To evaluate the clinical and radiological outcomes of triple osteotomy (modified Tönnis method) for advanced coxarthrosis.
  • To assess the effectiveness of this surgical technique in improving hip function and joint congruity.

Main Methods:

  • Retrospective evaluation of 79 triple osteotomies (modified Tönnis method) in 76 patients.
  • Surgical technique involved a modified Tönnis approach with acetabular rotation and fixation.
  • Clinical assessment using the Japanese Orthopaedic Association Hip Score and radiological evaluation including the CE angle.

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Main Results:

  • Significant improvement in the Japanese Orthopaedic Association Hip Score from 68 to 90 points.
  • Radiological evaluation showed 46% excellent, 44% fair, and 10% poor results regarding joint space and congruity.
  • A postoperative CE angle greater than 40 degrees correlated with good remodeling and favorable outcomes.

Conclusions:

  • Triple osteotomy using the modified Tönnis method is an effective surgical procedure for advanced coxarthrosis.
  • The technique leads to significant functional improvement and positive radiographic changes, particularly when achieving a postoperative CE angle > 40 degrees.