RESUMO
INTRODUCTION: Intra-articular distal radial fractures in young subjects occur in severe trauma. Articular reduction needs to be anatomical. We report four cases with the particularity of having a 90° or 180° rotated lunate fossa. Our goal is to bring out the positive aspects of surgical procedure by volar medial approach and to assess long-term functionnal and radiological results. MATERIAL AND METHODS: Our study focused on four men whose average age was 27 (age range from 19 to 43). The fractures were type IV according to Melone's classification. The associated lesions included: one fracture of the base of the ulnar styloid, one fracture of the distal quarter of the ulnar diaphysis and one scapho-lunate diastasis. We used a volar medial approach between the flexors tendons and the ulnar bundle in order to pin the fragment of lunate fossa. The rest of the radial epiphysis was pinned after a 5mm skin incision. In two cases, this pinning was complemented with a brachial-antebrachial-palmar cast and in the other two cases with an external fixator. RESULTS: The follow-up period averaged 68.8 (18 to 115) months, all the patients were clinically examined through antero-posterior, lateral and dynamic X-rays. The objective results assessed according to Green and O'Brien's criteria, later modified by Cooney, were as follows: two very good, one good, one average. The X-rays showed consolidated fractures. According to Knirk and Jupiter's classification of arthritis, we had three grades 0, one of which showed a subchondral sclerosis of the lunate fossa, and one grade 3. DISCUSSION AND CONCLUSION: Imaging with simple radiographs is not sufficient and needs to be complemented with CT scan. Our approach allows for direct access to the fragment of the lunate fossa and easier visualization of the distal radioulnar, compared to Henry's approach, thereby avoiding excessive traction of the median nerve. TYPE D'ÉTUDE: Niveau IV.
Assuntos
Fratura de Colles/cirurgia , Fixação Interna de Fraturas/métodos , Fraturas Intra-Articulares/cirurgia , Osso Semilunar/cirurgia , Placa Palmar/cirurgia , Fraturas da Ulna/cirurgia , Adulto , Fratura de Colles/diagnóstico por imagem , Fixadores Externos , Seguimentos , Consolidação da Fratura , Humanos , Fraturas Intra-Articulares/diagnóstico por imagem , Osso Semilunar/diagnóstico por imagem , Osso Semilunar/lesões , Masculino , Placa Palmar/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Fraturas da Ulna/diagnóstico por imagemRESUMO
We report clinical, radiological and histological findings following high tibial valgisation osteotomy (HTVO) using micro-macroporous biphasic calcium phosphate wedges fixed with a plate and locking screws. From 1999 to 2002, 43 knees were operated on and studied prospectively. All underwent clinical and radiological follow-up at days 1, 90, and 365 to evaluate consolidation and bone substitute interfaces. Additionally, biopsies were taken for histology at least 1 year after implantation from 10 patients who requested plate removal. Radiologically, consolidation was observed in 98% of cases. At 1 year, correction was unchanged in 95% of cases. Histological analysis revealed considerable MBCP resorption and bone ingrowth, both into the pores and replacing the bioceramic material. Polarised light microscopy confirmed normal bony architecture with trabecular and/or dense lamellar bone growth at the expense of the wedge implants. X-ray and micro-CT scan revealed a well organised and mineralised structure in the newly-formed bone. This study shows that using MBCP wedges in combination with orientable locking screws and a plate is a simple, safe and fast surgical technique for HTVO. The is the first study to examine the results by histological analysis, which confirmed good outcomes.