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Subtalar distraction bone block arthrodesis.

H J Trnka1, M E Easley, P W Lam

  • 1Department of Orthopaedic Surgery, Union Memorial Hospital, Baltimore, Maryland, USA.

The Journal of Bone and Joint Surgery. British Volume
|August 28, 2001
PubMed
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Subtalar bone block distraction arthrodesis effectively treats complex foot conditions, achieving high union rates and improved patient satisfaction. This surgical technique enhances hindfoot alignment and patient-reported outcomes in challenging cases.

Area of Science:

  • Orthopedic Surgery
  • Foot and Ankle Reconstruction
  • Bone Grafting Techniques

Background:

  • Late complications of calcaneal fractures, severe comminuted fractures, and nonunions present significant challenges in foot and ankle reconstruction.
  • Avascular necrosis of the talus and clubfoot deformity require advanced surgical interventions to restore function and alignment.
  • Subtalar joint pathology significantly impacts patient mobility and quality of life, necessitating effective treatment strategies.

Purpose of the Study:

  • To evaluate the efficacy of subtalar bone block distraction arthrodesis in managing a spectrum of complex hindfoot pathologies.
  • To assess clinical outcomes, including union rates, patient satisfaction, and functional scores, following this surgical procedure.
  • To analyze radiographic changes in hindfoot alignment and joint parameters post-subtalar arthrodesis.

Related Experiment Videos

Main Methods:

  • Retrospective analysis of 39 patients (41 feet) undergoing subtalar bone block distraction arthrodesis.
  • Clinical and radiological review, including the American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot scoring system, at a mean follow-up of 70 months.
  • Radiographic measurements of talocalcaneal angle, calcaneal pitch, talar declination, and talocalcaneal height were compared preoperatively and postoperatively.

Main Results:

  • A high union rate of 87% (32 out of 37 operations) was achieved.
  • The mean AOFAS hindfoot score significantly improved from 21.1 preoperatively to 68.9 at final follow-up.
  • Significant improvements were observed in talar declination angle and talocalcaneal height, with good maintenance of hindfoot alignment.

Conclusions:

  • Subtalar bone block distraction arthrodesis is a successful procedure for treating various complex hindfoot deformities and post-traumatic conditions.
  • The technique leads to substantial improvements in patient-reported functional scores and radiographic parameters.
  • High patient satisfaction rates indicate the procedure's value in restoring hindfoot function and alleviating pain.