The December 2022 Wrist & Hand Roundup³⁶⁰ looks at: Anti-tumour necrosis factor therapy for early-stage Dupuytren’s disease; Patient experiences of scaphoid waist fractures and their treatment; Postoperative complications following open a1 pulley release for a trigger finger or thumb; How certain are findings in distal radius fractures: a systematic review of randomized controlled trials; Partial wrist denervation in wrist osteoarthritis: patient-reported outcomes and objective function; Dorsal bridge plating versus bridging external fixation for management of complex distal radius fractures; How is reduction lost in distal radius fractures in females aged 50 years and older; The HAND-Q: psychometrics of a new patient-reported outcome measure for clinical and research applications.

Introduction and Objectives: Volar osteosynthesis with plates with angular stability in dorsal fractures has revolutionized the treatment of wrist fractures, since fixation is sufficiently stable to allow early physiotherapy and prevent fracture collapse, avoiding the great drawbacks of alternative treatments in unstable fractures. Materials and Methods: Retrospective study of 64 cases of wrist fracture with instability and dorsal deviation treated by means of a volar plate with angular stability. We carried out a clinical assessment that included: a quick-dash functional questionnaire, range of mobility, pain using a Virtual Analog Scale, fist grasping strength (Jamar dynamometer), associated lesions and postoperative complications. Radiological assessment included radiometry of the distal radius, time to radiological consolidation, and radiological post-traumatic complications. The statistical assessment of variables was carried out with an SPSS program version 15.0 for Windows. Results: We found that 86% of the patients were satisfied with the functional results, with a mean quick-dash score of 3.5. Radiological consolidation was achieved in all cases, without any need of a dorsal graft. Radiometry showed a morphology of the distal radius with no statistical differences when compared to the contralateral wrist. Discussion and Conclusions: This is an effective, reliable, reproducible method for the surgical treatment of unstable fractures of the distal radius, with minimum morbidity and early functional recovery

Two stainless steel ‘TriMed’ distal radial fracture reduction techniques were tested to compare the relative stability of the two in vitro for a pre-determined fracture pattern. The movement of the bony segments were plotted over time using an ARAMIS 3 dimensional non-contacting displacement mapping system (GOM mbH, Braunschweig, Germany) to give quantitative data. The data was used to calculate the relative motion of the bony segments with the aim of investigating regions of compression across the fracture line, which is thought to accelerate fracture healing, and shear between bony segments, which is detrimental to fracture healing. Ten third generation adult radius biomechanical model Sawbones (Sawbones, Malmö, Sweden) were cut to simulate AO type C2 fractures with dorsal comminution. Five bones were plated using the TriMed fixed angle volar bearing plate and five were plated using the TriMed radius and ulnar plating technique. Samples were potted and loaded cyclically at 1 Hz via a floating scaphoid-lunate bearing onto the end of the radius at incrementally increasing loads of 100 N – 500 N with 1000 load cycles applied for each load level. The results showed the radius and ulnar pin-plate configuration allowed greater movement of the articular surface, with relative shear motion and separation between the two segments, although the relative shear movement between the two distal segments was below 2mm, which is considered the definition of failed fixa-tion. With the volar bearing plate the two distal segments moved as single unit and compression with minimal shear was applied across the fracture line to the proximal radius. Thus the radius and ulnar plates allowed shear across all three fracture lines, while the volar plate held the two distal segments fixed relative to each other and allowed compression across the interface with the proximal radius. The ARAMIS system allowed the three dimensional motion of the bony segments to be followed, in particular the relative motion between the segments, indicating the type of healing to be expected clinically. The study demonstrated the value of ARAMIS in investigating the stability of wrist fractures fixations and can easily be adapted to investigate other orthopaedic fixation systems