The authors reported the case of a 27-year-old man who sustained an irreducible postero-lateral traumatic dislocation of the hip with capsular and labral entrapment. Initial X-rays showed only a small acetabular fragment. After two attempts to reduce the hip with muscle paralysis under general anaesthesia failed, the patient was treated by immediate open reduction through a postero-lateral approach. Surgical exploration of the hip revealed a small osteochondral fragment attached to a large piece of labrum and capsule, clogging the acetabulum. The femoral head crossed over the torn capsule with a buttonhole effect. These elements were relieved, the bone fragment was fixed with a 2 mm screw and the capsule was repaired. At the 10-year follow-up, the functional outcome was excellent with a Harris score of 100 points and no signs of necrosis or osteoarthritis. The authors propose a literature review of this uncommon lesion.
Acetabulum ; Bone Screws ; Femur Head ; Hip Dislocation ; surgery ; Humans ; Orthopedic Procedures

PURPOSE: The osseointegration around titanium mini-implants installed in macroporous biphasic calcium phosphate (MBCP) blocks was evaluated after incubation with recombinant human bone morphogenetic protein-2 (rhBMP-2) in an ectopic subcutaneous rat model. METHODS: Mini-implants (phi1.8x12 mm) were installed in MBCP blocks (bMBCPs, 4x5x15 mm) loaded with rhBMP-2 at 0.1 mg/mL, and then implanted for 8 weeks into subcutaneous pockets of male Sprague-Dawley rats (n=10). A histomorphometric analysis was performed, and the bone-to-implant contact (BIC) and bone density were evaluated. RESULTS: Significant osteoinductive activity was induced in the rhBMP-2/bMBCP group. The percentage of BIC was 41.23+/-4.13% (mean+/-standard deviation), while bone density was 33.47+/-5.73%. In contrast, no bone formation was observed in the bMBCP only group. CONCLUSIONS: This model represents a more standardized tool for analyzing osseointegration and bone healing along the implant surface and in bMBCPs that excludes various healing factors derived from selected animals and defect models.
Animals ; Bone Density ; Bone Morphogenetic Protein 2 ; Calcium ; Dental Implants ; Humans ; Hydroxyapatites ; Male ; Nitrogen Mustard Compounds ; Osseointegration ; Osteogenesis ; Rats ; Rats, Sprague-Dawley ; Recombinant Proteins ; Titanium ; Transforming Growth Factor beta