Arthrodesis of the subtalar joint using a novel biphasic calcium phosphate bone graft

Arthrodesis of the subtalar joint using a novel biphasic calcium phosphate bone graft

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Study design: Retrospective level IV study.Background: Limited availability of autologous bone graft has led to a vast array of alternative bone Diapers graft options including allograft, demineralized bone matrices, cell-based matrices, and synthetic bone grafts.In this retrospective review, a control group of patients undergoing subtalar joint arthrodesis using a conventional bone graft was compared to a matched study group utilizing a novel synthetic biphasic calcium phosphate (BCP) bone graft with advanced surface topography.Materials and methods: Seventeen consecutive patients underwent subtalar joint arthrodesis using a novel BCP with a unique submicron surface topography, either as a standalone graft or mixed with bone marrow aspirate.Fusion outcomes were assessed via radiographs at six-weeks and twelve-weeks.

Clinical outcomes were assessed via weight bearing status at six-weeks and twelve-weeks.These results were compared to a matched study group of 15 patients undergoing subtalar joint arthrodesis using a conventional bone Glass Bowls graft.Results: Seventeen of seventeen (100%) of patients completed full follow up.Twelve of seventeen patients had complete fusion at 12 weeks (70%) and four of seventeen patients (23%) had partial fusion at 12 weeks.One of seventeen (5%) had revision arthrodesis.

All patients were 100% weight bearing at 12 weeks.In the control group, fifteen of fifteen (100%) of patients completed full follow up.At 12 weeks, seven of fifteen (46%) had complete fusion, seven of fifteen (46%) had partial fusion, and one (6%) did not fuse and went on to revision surgery.Conclusions: This novel submicron surface topography BCP offers a promising bone graft substitute for arthrodesis of the subtalar joint.