The aim of our study is to investigate the natural history of scaphoid non-union.

Factors affecting the outcome of scaphoid fracture non-union surgery were assessed using data collected retrospectively from 785 cases treated at 18 centres throughout the UK. All cases had undergone this surgery before October 2014, ensuring a minimum period of 2 years between surgery and data collection from the medical records.

Smoking status significantly influenced the union rate of 94 proximal pole (non-smokers = 71%, smokers = 44%, p < 0.05) but not waist (non-smokers = 73% non-unions.

Type of bone graft did not affect the union rate of the 282 waist nonunions (iliac crest = 69%; non-vascular distal radius = 75% and vascularised distal radius = 70%: P=0.35), but did influence the union rate of the 98 proximal pole nonunions (iliac crest = 58%; non-vascular distal radius = 58% and vascularised distal radius = 82%: P=0.004).

Time interval between fracture and non-union surgery did not affect the union rate of 121 proximal pole nonunions (3–6 months = 56%; 6–12 months = 76%; 1–2 years = 69%; 2+years = 54%: P=0.5), but did influence the union rate of 303 nonunions of the waist (3–6 months = 80%; 6–12 months = 82%; 1–2 years = 65%; 2+years = 55%: P=0.02).

Non-unions of the proximal pole appear to be influenced by smoking status and bone graft type, whereas non-unions of the scaphoid are influenced by the time to non-union surgery.

Heterotopic ossification (HO) is the formation of lamellar bone in extra-skeletal soft tissues. Its exact pathogenic mechanism remains elusive. Previous studies demonstrate observation only of HO at the microscopic scale. This study uses scanning electron microscopy (SEM), Back-scatter electron (BSE) imaging and mechanical testing to detail the organic and non-organic elements of HO, compared to normal bone, to guide stem cell and bio-modelling research into HO. Samples analysed were 5 military blast related HO patients, 5 control cadaveric samples (age and sex matched). Samples were imaged using SEM, BSE and the I13 beam Synchrotron x-ray diffraction scanner using validated quantitative and qualitative techniques of measurement. Appearances seen in HO compared to normal bone were characterised by the presence of a hyper-vascular network and high lacunae (osteocyte) counts, two distinct zones of bone mineral density distribution, with a tendency for hypermineralisation with kurtosis of the grey scale plots (mineral content as a weight percentage of Ca²⁺ was calibrated to atomic weight of C, Al and HA). Direction of dependence and collagen orientation in HO suggest isotropic properties. This research demonstrates that HO is bone, however its characteristics suggest a high metabolic turnover and disorganised ultra-structure consistent with an inflammatory origin.

Historically human and animal bites to the hand have resulted in significant morbidity in relation to the high risk of contamination and subsequent infection. Our study aimed to assess the outcomes following such injuries in terms of infection requiring further intervention through specialist referral to the hand surgery team at our hospital.

124 consecutive patients attending the A&E department over a three month period in 2011 were included in this retrospective study which provided 126 separate cases due to bilateral injuries (110 animal: 16 human). Data was obtained from the electronic patient management system. The demographics of each patient were recorded followed by type of bite sustained including number and size of lacerations.

79% of patients presented within 24 hours and the majority before 6 hours from injury. The majority of the forearm bites were documented as superficial abrasions and none of these went on to develop problems with infection, so the study concentrated on bite injuries to the hand of which there were 99 cases. Most hand injuries were a single puncture or laceration (64%) but in 9 cases there were greater than 3 separate wounds.

5 cases were directly referred to the Hand surgery team with 4 requiring admission and of these 3 required washout and debdridement in theatres. The remaining 94 cases were managed solely by A&E. Of these 94 cases 87 pts received Abx and 78 pts had a lavage. Overall 68% received both Abx and lavage. Subsequent to discharge from A&E only 3 developed problems with infection later (2 requiring specialist input) they were all dog bites and in keeping with the ‘typical’ bite pattern seen in other pts.

The study concluded that bites not involving joint, tendon or bone have only a small chance of causing infection provided good initial treatment.

Background

It was hypothesised that preserving a layer of gliding tissue, the parietal layer of the ulnar bursa, between the contents of the carpal tunnel and the soft tissues incised during carpal tunnel surgery might reduce scar pain and improve grip strength and function following open carpal tunnel decompression.

Background

Scaphoid fracture malunion with flexion and shortening results in the ‘humpback deformity’. This is thought to be associated with poor clinical results when assessed with the lateral intra-scaphoid angle and the Green and O'Brien wrist evaluation scale. This method of deformity measurement is now considered unreliable and the functional score has not been validated in the setting of scaphoid fractures.

Background

A randomised prospective study has already demonstrated that at 1-year follow-up, palmaris longus interposition or flexor carpi radialis (FCR) ligament reconstruction and tendon interposition do not improve the outcome of trapeziectomy for the treatment of painful osteoarthritis of the trapeziometacarpal joint. This study consisted of 183 thumbs in 162 women.