Subtalar fusion with iliac bone free flap after a recalcitrant nonunion: Report of two cases.

Fractures of the calcaneus are associated with secondary osteoarthritis of the subtalar joint. In a persistent nonunion, vascularized bone flaps offer superior biologic and mechanical properties as well as accelerates joint fusion and decreases morbidity. In this report, we present results of the use of vascularized iliac bone free flap for treating subtalar failed fusions in two patients.

Polylactide Vitrimers.

While much research has been aimed at new approaches to the healing of cross-linked polymers, there is a dearth of effort in the healing of renewable cross-linked polymers. In this study, the healing ability of renewable polylactide-based vitrimers containing Sn(Oct) was investigated. The vitrimers were prepared from hydroxyl-terminated star-shaped poly((±)-lactide) samples that were cross-linked with methylenediphenyl diisocyanate.