The aim of this study is to present and discuss some preliminary applications of tricalcium phosphate “Norian” in children and adolescents with different skeletal disorders. From 1997 to 2002 Norian was used as a biological bone substitute in 10 patients (six girls and four boys; mean age 11 years). The indications were four calcaneal cysts, one phalangeal enchondroma of the hand, one chondromyxoid fibroma of the tibia, one eosino-philic granuloma of the femur and one aneurysmal cyst of the tibia. Norian was also used as a bone graft in two Dega’s pelvic osteotomies. Follow-up was performed radiologically and clinically.

There was one deep infection in a calcaneal cyst which completely healed after curettage and antibiotic therapy and one soft tissue transitory painful reaction to Norian. All cases healed without complication and there was progressive osteointegration at radiological follow-up.

This preliminary study, even with different pathologies and a short follow-up, shows good biocompatibility of the material in the short- and mid-term, with satisfactory clinical results. Mechanical stability under compressive and shearing loads was detected when load bearing was allowed after 30 days in all cases.

Norian tricalcic phosphate is a good and strong bone substitute when a large autologus graft is needed as seen with distal fractures of the radius, tibial plateau and Dega’s pelvic osteotomy.

Introduction. Congenital deficiency of the fibula frequently presents as spectrum of musculoskeletal anomalies involving the ipsilateral hip, femur, knee, tibia/fibula, ankle and foot. Until recently the treatment of choice for sever type-II fibular hemimelia has been Syme’s or Boyd’s amputation. The present technique of limb lengthening with distraction osteogenesis have proved to be a valid alternative. The study shows that simultaneous treatment of tibial and foot deformities allows the patient to obtain a plantigrade foot and to avoid the prosthetic choice of treatment.

Materials and methods. 12 patients with 15 involved extremities underwent tibial lengthening and correction of the foot deformities for congenital tipe II fibular hemimelia with Ilizarov apparatus. There were 10 boys and 2 girls, range 7 years 3 month to 16 years 2 month (mean 10 years 7 month). The mean follow up time was 28 months ( range 15–63 month). Most of the patients had hypoplasia of the lateral femoral condyle and femoral shortening and simultaneous lengthening of femur in 9 cases was performed. Valgus-procurvatum deformity of tibia was present in all cases, absent lateral rays were present in 8 feet, foot coalition in 5 feet.

Results. Lengthening of the tibia was performed at one level in 4 cases In the other 11 it was performed simultaneously with a proximal osteotomy of tibia to correct thevalgus and with a supramalleolar osteotomy to obtain axial realignment of ankle. Correction of the foot deformities was performed by closed method in 5 cases with overcorrecton in varus-adduction and plaster cast. Subtalar osteotomy in the presence of coalition was performed in 5 cases, osteotomy of calcaneus for equinus in3, and in 2 cases osteotomy through rigid subtalar joint. Osteotomy of midfoot for abducted and equines forefoot was performed in 3 cases. In two difficult rigid cases ankle arthrodesis was needed to stabilise the foot. Prophylactic anlage excision with soft tissue release and Achilles-tendon lengthening in 13 cases. Good results were achieved in 12 cases. 2 were successful and one poor because the patient refused continuing treatment with external fixator. There were 5 major and 16 minor complications. Complications involving delayed consolidation, bending or deformation of regenerated bone, early consolidation were observed in 4 cases. Complications involving soft tissue were observed in 9 cases, There were no permanent neurological and vascular injures.

Conclusions. The Ilizarov technique provides a means of achieving simultaneous lengthening of the femur and tibia, angular and rotational deformities correction in children with congenital type II fibular hemimelia. This method should be combined with simultaneous ankle and foot reconstruction for correction of eqininovalgus deformity associated instability and subluxation of ankle. This method should be combined with simultaneous ankle and foot reconstruction for correction of eqininovalgus deformity associated instability and subluxation of ankle. Various types of osteotomy of the hind and mid food give the possibility to achieve the stable result of correction.