The Cochrane Collaboration has produced three new reviews relevant to bone and joint surgery since the publication of the last Cochrane Corner. These are relevant to a wide range of musculoskeletal specialists, and include reviews in lateral elbow pain, osteoarthritis of the big toe joint, and cervical spine injury in paediatric trauma patients

Used routinely in maxillofacial reconstructive surgery, the chondrocostal graft is also applied to hand surgery in traumatic or pathologic indications. The purpose of this overview was to analyze at long-term follow-up the radiological and histological evolution of this autograft, in hand and wrist surgery. We extrapolated this autograft technique to the elbow by using perichondrium. Since 1992, 148 patients have undergone chondrocostal autograft: 116 osteoarthritis of the thumb carpometacarpal joint, 18 radioscaphoid arthritis, 6 articular malunions of the distal radius, 4 kienbock's disease, and 4 traumatic loss of cartilage of the proximal interphalangeal (PIP) joint. Perichondrium autografts were used in 3 patients with elbow osteoarthritis. Magnetic Resonance Imaging (MRI) was performed in 19 patients with a mean follow-up of 68 months (4–159). Histological studies were performed on: i) perioperative chondrocostal grafts (n=3), ii) chondrocostal grafts explanted between 2 and 48 months after surgery (n=10), and iii) perioperative perichondrium grafts (n=2). Whatever the indication, the reconstruction by a chondrocostal/ostochondrocostal or perichondrium graft yielded satisfactory clinical results at long-term follow-up. The main question was the viability of the graft. -. For rib cartilage grafting: The radiological study indicated the non-wear of the graft and a certain degree of ossification. The MRI and histology confirmed a very small degree of osseous metaplasia and graft viability. The biopsies showed neo-vascularization of the cartilage that had undergone morphological, constitutional and architectural changes. Comparison of these structural modifications with perioperative chondrocostal graft histology is in progress. -. For perichondrium grafting: The first cases gave satisfactory clinical results but must be confirmed on a larger number of patients. Histological results highlighted a tissue composed of one fibrous layer and one cartilage-like layer, a common composition of supporting tissue. Despite the strong mechanical strain in the hand and wrist, chondrocostal graft is a biological arthroplasty that is trustworthy and secure over the long term, although it can cause infrequent complications inherent to this type of surgery. Despite the inevitable histological modification, the cartilage remains alive and is of satisfactory quality at long term follow-up and fulfills the requirements for interposition and reconstruction of an articular surface. The perichondrium graft constitutes a new arsenal to cure cartilage resurfacing. The importance of perichondrium for the survival of the grafted cartilage, as previously reported, as well as its role in resurfacing, is being investigated