[The evolution of phosphocalcic cement in phalangeal and metacarpal enchondromas. A retrospective study of 13 cases]

Chondromas are the most frequent benign tumors of the skeleton. The surgical treatment of these tumors consists of curettage of the tumor, which may be associated with a filling of the defect. One of the filling techniques uses bone substitutes. The primary objective was to evaluate the resorption of phosphocalcic injectable cements and their evolution in bone sites. The secondary objectives were to evaluate the function of the finger and to look for a possible recurrence of the chondroma. We performed a bi-centric study and reviewed 13 patients with 14 phalanx or metacarpal chondromas operated on by phosphocalcic cement filling technique with a minimum follow-up of 2years. An X-ray at the longest follow-up was performed as well as a QDASH, a "finger score" and a measurement of the amplitudes. Cement disappearance was observed in 100% of 5 patients. An average of 30% of cement remained at the last follow-up (0-80%). The disappearance of cement was significantly inversely proportional to the time since the last radiograph (P<0.01). On average, total disappearance of cement was found at about 6years postoperatively. The mean QDASH score was 6.1 (0; 40.91). The mean finger score was 3 (0-24). The disappearance of the cement seems to occur in the medium term after its installation but does not predict the functional recovery and satisfaction of patients operated on for the cure of a chondroma of the hand.