[Bone substitution materials in therapy of cystic tumors of the immature skeleton].

The primary goal in the treatment of cystic bone tumors in children is the restoration of bone integrity and normal function. It is assumed that filling of the cavity defect after removal of the tumor will facilitate bone healing. In order to reduce the complications observed with autografts and allografts use bone graft substitutes were developed. The current literature review shows that the application of substances with potential immunogenic, toxic or cancerogenic properties should be avoided. Among the purely synthetic mineral materials, tricalcium phosphate has the biochemical properties most compatible with new bone formation and calcium phosphate cements can be used to provide immediate stability in cases of existing or imminent fractures. However, there is currently insufficient evidence that the use of bone grafts or bone graft substitutes provides a real benefit to the patient, especially in comparison with no graft at all. Prospective randomized studies are necessary in order to delineate the indications for bone grafting or use of bone graft substitutes for the treatment of cystic bone tumors in children.