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J Foot Ankle Surg. 2000 Jan-Feb;39(1):2-14.

Posterior calcaneal displacement osteotomy for adult acquired flatfoot.

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  • 1Department of Surgery, The Western Pennsylvania Hospital, Pittsburgh, USA.


The authors retrospectively reviewed 24 patients who underwent posterior calcaneal displacement osteotomy (PCDO) for posterior tibial tendon dysfunction and adult acquired flatfoot deformity from 1991 to 1996. The average follow-up was 27 months. Analysis consisted of preoperative and postoperative evaluation of radiographs, as well as postoperative subjective results. Ancillary procedures included flexor digitorum longus tendon transfer (n = 19), tendo Achilles lengthening (n = 21), tibialis anterior tendon transfer (n = 5), naviculocuneiform joint arthrodesis (n = 4), and first metatarsocunieform joint arthrodesis (n = 1). The talo-first metatarsal angle on the lateral view decreased from a preoperative average of 22.13 degrees to a postoperative average of 8.50 degrees. The talo-first metatarsal angle on the anteroposterior view decreased from an average preoperative value of 22.96 degrees to a postoperative average of 11.04 degrees. In all cases, talar head coverage at the talonavicular joint improved. Subjective results were categorized as good (n = 17), satisfactory (n = 5), and poor (n = 2). Complications included sural neuritis (n = 6), Achilles tendon rupture (n = 2), difficulty with fixation (n = 2), and undercorrection of deformity (n = 2). Patients who had higher preoperative and postoperative talo-first metatarsal angles on either the anteroposterior or lateral radiographs had significantly poorer outcomes (p = .0403, p = .002, p = .009, p = .001, respectively). In addition, those patients who had medial column fusions had statistically significant poorer subjective results (p = .015). Patients who had flexor digitorum longus (FDL) tendon transfers did significantly better than those patients who did not have FDL transfer (p = .004). The authors conclude that the posterior calcaneal displacement osteotomy is a reasonable option for management of posterior tibial tendon dysfunction in the adult acquired flatfoot.

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