Using a reverse engineering capability to quantify the factors that control the rigid body mechanics of the wrist, a mathematical forward animation capability and model of wrist motion that allows the carpus to move under its own rules is being developed. This characterises the isometric connections, from which was developed the Stable Central Column Theory of Carpal Mechanics - which incorporates the Law of Rules Based Motion. This work has now advanced to the ability to reapply the extracted rules to allow rules-based rigid body reanimation of an individual wrist. As each wrist is unique, there is a given reality that each reanimation must be based on an individual wrist's unique rules, and the aspiration to create a standard or normal wrist is unrealistic. Using True Life Anatomy (Adelaide, Aust) analysis software, the specific rules (morphology / connectivity / interaction / loading) of individual wrists have been characterised, and then reapplied in a rigid body reanimation environment using Adams (MSC Software, U.S.) software. In the preliminary application of this biomechanics environment, by using the reverse engineering / forward reanimation process, wrist motion can be recreated - based purely on the unique rules, extracted from individual wrists. Instability of the proximal scaphoid was evident in several of the animations, and there was confirmation that the spatial attachment points of the isometric constraints are very exacting. The actual attachment and specific morphology of the carpal bones varied between individual wrists. Using a reverse engineering and then forward reanimation process, we have been able to recreate wrist motion using the rigid body mechanics based on the Law of Rules Based Motion. Further work is required, but the potential to apply “what if” virtual surgery options to an individual injured wrist and more precisely characterise and test solutions to wrist dysfunction are becoming realised

Aim: Because of the low prevalence, there is a poor evidence on the effective management of bone and joint infections of the carpus and metacarpus. We therefore studied the outcomes of patients undergoing surgical treatment at our department. Method: We conducted a retrospective study on all patients operated on because of osteomyelitis of the carpus and metacarpus between January 1998 and June 2004. Main study endpoint were the infection controll rate at end of treatment and at time of follow-up. Results: Of eleven subjects (nine men, two women) with a median age of 43 years (range, 19 to 79 years) serial débridement with temporary wound closure and surgical fixation proved successful in ten cases. We identified causative pathogens in ten cases (S. aureus: n=3, P. aeruginosa: n=3, mixed: n=4) by intraoperative biopsy. Eight subjects received local or free tissue flaps. A 73 year old man died in hospital. Follow-up information was available for eight patients after a median of 19,5 months (range: 3 to 61 months). Seven of them did not show signs of recurrent infection. Conclusion: Adhering to accepted standards of treating osteomyelitis, satisfactory control rates in carpal and metacarpal infection can be achieved while salvaging the hand

Background: Osteoid Osteomas were first described by Bergstrand (1930), and were later elaborated by Jaffe (1935). They account for 12% of all benign bone tumors. Approximately 6–8% of lesions occur in the hand, and can be extremely difficult to diagnose. Aims: A retrospective review of osteoid osteomas from the Scottish Bone Tumor Registry is presented focusing on the unusual clinical features of lesions of the carpus and hand. Results: 19 patients (8 male, 11 female) were identified from the registry. The mean age at presentation was 27.5 Yrs (10–56 Yrs). 78% of lesions occurred within 2nd–3rd decade of life. Pain over the involved area most noticeably at night, was the usual presentation. 21% gave history of associated trauma. Phalangeal lesions accounted for 68.4% tumors with the proximal phalanx predominating.4 lesions involved the distal phalanx. There were 3 metacarpal and 3 carpal lesions. Carpal bones involved included the Capitate (2), and the Trapezium (1). Clubbing was noticed in distal phalanx lesions. The mean time from presentation to diagnosis was 5.6 months. 9 patients were initially misdiagnosed as having either a traumatic or infective condition.3 patients required a bone scan for diagnosis. All patients underwent surgical excision, with 2 requiring bone grafting. Follow up ranged from 1–9 Yrs (mean 3Yrs). There were no instances of recurrence or spontaneous regression. Discussion: Osteoid Osteoma is an infrequent tumor of the hand. Absence of typical pain pattern, unobtrusive radiographic features (absence of reactive bone, inapparent nidus), and variations in the histological picture make diagnosis in this region difficult. Lesions are easily misdiagnosed and successful treatment often delayed. Isotope bone scan is diagnostic and CT accurately visualizes the nidus. Awareness of these characteristics may aid early diagnosis. Surgical excision is usually curative and has excellent prognosis

Purpose: This retrospective analysis was performed to determine the long-term usefulness of carpectomy and to define prognostic factors.

Material and methods: Forty-four patients were operated. There mean age was 39.2 years, and mean follow-up was 17 years (10–35 years). Twenty-two patients had osteoarthritis, one STT, thirteen SNAC-wrist, two SLAC-wrist, and three radiocarpal osteoarthritis. The wrists were free of degenerative lesions in 22 cases: eight Kienböck disease, five longstanding perilunar dislocations, six fracture sequelae, and one rheumatoid polyarthritis. Seventeen patients had had several procedures before the present operation. The dorsal approach was used for all patients except five. Complementary styloidectomy was associated in two cases. clinical and radiological outcome was assessed at one, five and fifteen years. Factors predictie of outcome were analysed with the Student test and the Man and Whitney test.

Results: The pain score (Cooney scale 1 to 4) was 3.19 preoperatively and 1.56, 1.88 and < 2 at one, five and fifteen years respectively. Flexion amplitude improved from 44° preoperatively to 61°, 68° and 62° at one, five and fifteen years respectively. Mean grip force, compared with the other wrist was 57.5%, 75% and 64% at one, five and fifteen years. Radiographically, at fifteen years 80% of the patients had a centred capitatum on the AP view of the lunar facet. On the lateral view, 56% of the patients exhibited anterior translation of the apitatum and 37% were centred. There was a degradation of the radiocapitum space requiring revision for arthrodesis in five cases.

Discussion, conclusion: This study confirms the long-term preservation of outcome after proximal carpectomy: 89% of the patients were satisfied at fifteen years. These findings also indicate that reconstruction of recent trauma (fracture-dislocation) produces variable results. For patients with grade II or II osteoarthritis (SNAC or SLAC-wrist) carpectomy should be reserved for selected patients with occupational or sports activities not requiring grip force. For grade III wrists, carpectomy can be proposed for elderly patients with limited activity. Grade IV is a contraindication for carpectomy. We do not recommend this procedure for patients with rheumatoid arthritis or Kienböck disease.

Purpose: The synovectomy-reaxation-stabilisation (SRS) procedure classically involves tenosynovectomy of the extensors, articulr synovectomy, partial deinnervation of the wrist, and tendon transfer. The purpose of this study was to: 1) evaluate functional and radiographic results, 2) search for possible correlations between results and the extent of articular synovectomy or type of tendon transfer. Material and methods: Between 1984 and 1998, an SRS procedure was performed in 75 patients, 14 were excluded: seven had died, five were lost to folow-u and two had had wrist arthrodesis. A total of 73 wrists were analysed in 61 patients. Mean follow-up was 70 months and mean patient age was 53 years. Functional assessment was based on the Gschwend pain scale. Results: Before surgery, 94% of the patients had grade III or IV pain. At last follow-up, 93% of them grade 0 or I. The gain in pain was greatest for patients with severe carpitis. At last follow-up, the wrist was stiff; stiffness basically involved flexion with 43° pre and 27° postoperatively, radial inclination 13° pre and 9° postoperatively, and pronation in patients with advanced Larsen grade preoperatively. Extension, ulnar inclination, and supination were improved 5° to 10°. Extension of the synovectomy to carpal joints had a stiffening effect. Before the operation, 25 wrists were in Larsen grades 0, 1 and 2 and 48 wrists were in Larsen grades 3 or 4. At last follow-up, there were nine wrists in Larsen grades 0, 1, or 2 and 64 in Larsen grades 3 or 4. Carpitis thus continued to evolve and the height of the carpus declined. Ulnar translation of the carpus progressed a mean 2 mm. Spontaneous radial inclination of the wrist was aggravated by a mean 3°. The frontal position of the wrist was better after transfer of the long radial extensor of the carpus on the short radial extensor of the carpus than for transfer on the ulnar extensor of the carpus or without transfer. Discussion: Our pain results are in agreement with data in the literature but we did not observe preserved or improved mobility. Extended synovectomy appeared to have a stiffening effect. Progression of the ulnar translation of the carpus was less pronounced with simple resection of the head of the ulna. It was better to transfer the long radial extensor of the carpus on the short radial extensor of the carpus to correct for frontal deviation of the carpus

Aim: The carpus is an intricate series of intercalated segments that are controlled by specific ligamentous constraints. During radial deviation (RD), the lateral carpal column shortens but the apparent differential rotation between the scaphoid, lunate and trapezium is not well explained by current theories. This project aims to demonstrate the 3D excursion of the various wrist components and identify those rules that guide and control such motions. Materials and Methods: By animating 3D CT scans of the normal and abnormal wrist in various positions of coronal and sagittal deviation, the dynamic intercarpal relationships can be demonstrated, ligamentous constraints inferred, and reconstructive options identified and assessed. This involved the development of specific surface rendering software that created a true 3D model (within a graphics animation environment) of the carpus in various positions of sagittal as well as coronal deviation. The intercarpal isometric points that correspond to known ligaments were identified, and motion of the bones plotted through space. Results: During ulnar to RD, the trapezium, which is firmly attached to the scaphoid, supinates around the foreshortening lateral column. Further, the axial rotation of the scaphoid in combination with its “scaphoid” shape produces an increase in the apparent scaphoid flexion in the sagittal plane. The scaphoid acts as a rotating link between the lunate and trapezium, and lunate stability is explained by the obligate translation combined with the obliquity of the (volar) radio-lunate ligament. “Virtual” scapho-trapezial, radio-capitate and radio-lunate ligaments are evident, however, the scapho-lunate connection is less rigid. Discussion: An understanding of the fixed constraints (isometric points) and motion rules and patterns within the carpus allows for injury characterisation and the development of more logical reconstructive interventions that attempt to replicate normal kinetics. Specific motion rules of the carpus have been established allowing virtual reconstructive surgery on normal and pathological wrists. Ref:. www.madacademy.com.au/tla. , . www.truelifeanatomy.com

Introduction and Aims: Kinematic and morphologic suggests the scaphoid may be moved differently between individuals. This study therefore aims to determine to what extent the morphology and ligamentous support of the scaphoid supports the suggestion of variable scaphoid motion. The influence of scaphoid motion on the remainder of the carpus will be considered. Method: Embalmed specimens were either dissected (n=50) using 3x loupes, sectioned histologically (n=30) or sectioned macroscopically (n=20). Results: Two distinct morphological patterns were observed. Some scaphoids had a shallow capitate facet and were supported by a series of ligaments that may prevent flexion/extension, but allow/facilitate rotation about the longitudinal axis of the scaphoid. Others had deeply concave capitate facets and were supported by ligaments that may prevent rotation but allow flexion/ extension. These patterns may be continuous throughout the proximal row of the carpus. Conclusion: Two morphological patterns may dictate the mechanical pattern of the carpus. A flexing and extending scaphoid is restricted by the capitate to its radial position, while a rotating scaphoid may be allowed to translate along the proximoulnar aspect of the capitate

Aim. Skeletal tuberculosis (TB) accounts for up to one third of cases of extra-pulmonary TB but comprises a minority of osteoarticular infection in areas with low TB incidence. Consequently, unexpected cases may receive surgical management targeted at non-tuberculous orthopaedic infections. This study reviewed treatment and outcomes of non-spinal osteoarticular TB to assess outcomes from modern surgical techniques. Method. All patients with a diagnosis of non-spinal osteoarticular TB between 2009–2017 from one tertiary referral centre were included. Retrospective review of surgical intervention, antibiotic treatment and outcome was conducted. Results. Fourteen patients with an average age of 48 (range 20–77) were identified; all were HIV-negative. Articular infections affected 7 patients, including one prosthetic joint infection. Osteomyelitis affecting the carpus, femur, tibia, olecranon and metatarsals was diagnosed in the remaining patients. Only 4 patients had radiological findings consistent with prior pulmonary TB, and only 3 had a history of prior TB or TB exposure. In 2 cases, symptom exacerbation was associated with local steroid injection. Diagnostic biopsy was employed in 5 cases, of whom 4 proceeded to medical management. Diagnosis was made following positive culture in 86% of cases; all TB isolates were fully sensitive. 71% of cases underwent surgical treatment according to best practice for biofilm-forming infection, including excision of osteomyelitis with local antibiotic therapy for three patients, and first-stage excision with spacer implantation for four patients. Quadruple therapy for an average of 8.5 months, range 6–12 months, was administered. Patients were followed up for a mean of 15.2 months. Half of the patients treated with surgery reported ongoing pain at 3 months and 4 patients underwent further surgery for persistent signs of infection (2 for probable persistent TB, 2 for bacterial super-infection). Conclusions. The role of surgical debridement in management of osteoarticular TB is unclear. In patients with a previous history of TB exposure a pre-operative diagnosis of TB could prevent unnecessary surgery and therefore prevent associated post-operative complications including bacterial super-infection and pain. Pre-op biopsy should therefore be considered in all patients with a history of TB exposure

Purpose of the study: Appropriate management of chronic sprains of the scapholunate joint remains a subject of debate. Different surgical techniques have been proposed, from partial arthrodesis of the carpus to ligamentoplasty. We opted for scaphocapitatum arthrodesis. The purpose of this report was to assess clinical and radiological outcome. Material and methods: From 1997 to 2001, 13 arthrodeses (13 patients) were performed for this indication. The procedure involved two screws (n=11), one screw and stapling (n=1), and stapling alone (n=1). A free autologous graft was used in all cases. Mean patient age was 40 years (12 males and one female). These patients were victims of sports accidents (n=8) or occupational accidents (n=5). Mean follow-up was 26 months (range 24–31 months). Variables noted were joint mobility, pain, grasp force and pinch force. Wrist x-rays were used to measure the height of the carpus and the radio-lunate angle. Results: A 31% loss in the radial inclination was noted as as a 14.5% loss in the ulnar inclination. Dorsal flexion of the wrist declined from 60° to 48°, palmar flexion from 47° to 28°. Stiffness mainly involved the radial inclination and palmar flexion. Grasp and Pinch forces improved (125° on average). All patients excep one presented residual pain. Six patients complained of pain only for efforts and six presented invalidating pain. Only seven patients were able to resume their occupational activity. There were three cases of nonunion which required revision to achieve final bone healing (poor outcome). Carpal height improved (0.47±0.54). The mean radiolunate angle at last follow-up was 11°. DISI persisted in only one wrist. Discussion: This technique reduced wrist mobility. For all patients, the dorsal approach to the wrist produced inevitable stiffness. Radial inclination declines due to the intracarpal fusion. This arthrodesis enabled restitution of the carpal height and partially corrected for the DISI. This operation did not provide pain relief but did not alter the carpal x-ray. We raise the question of the pertinence of associating this type of arthrodesis with total denervation of the wrist

Purpose: We reviewed a series of pollicizations in children with congenital thumb malformations. The purpose of this study was to assess the influence of anatomic or technical factors on functional and cosmetic outcome. Material: The series included 33 operations in 26 children. The Blauth classification was: grade IIIA (n=1), grade IIIB (n=8), grade IV (n=8), grade V (n=13), mirror hand (n=8). We noted the type of skin incision, technique used to fix the metacarpal head on the carpus, and tendon shortenings. Results were assessed at mean 4 years follow-up on the basis of the cosmetic aspect (parent satisfaction) and functional outcome measured with the Kapandji index and flexion-extension of inter-phalangeal joint, thumb finger opposition, and sensitivity. Results: Mean age at surgery was 32 months. Fixation was achieved with sutures in 24 cases and pinning in nine. Tendon shortening was performed in 16 cases on the extensor system and in one case on the deep flexor system. Mean follow-up was four years. There was no significant difference between groups A and B for cosmetic outcome. The main factor influencing objective functional outcome was the association of a grade III or IV radial club hand. In these patients, the final outcome was compromised by the stiffness or deformation of the radiocarpal joint and the stiffness of the preoperative Kapandji index which was 7 (mean) in group A and 4.75 in group B. Discussion and conclusion: The following technical aspects did not have a significant effect on the final functional result in our series: type of skin incision, type of carpal fixation, shortening the extensor or flexor system. Technical aspects which must be performed with particular care include reconstruction of the thenar muscles using interosseous muscles, curettage of the growth cartilage of the head of the second metacarpus, and hyper-extension of the head of the second metacarpus during fixation onto the carpus. Careful technique avoids future complications such as excessive growth of the neometa-carpus or Z-thumb

Purpose: Transscaphoretrolunate dislocation is the most frequent perilunate dislocation of the carpus (65% according to Herzberg). Treatment remains controversial. The aim of this work was to analyse functional outcome in a homogeneous series of 15 patients treated by open reduction and fixation. Material and methods: This retrospective analysis of 15 patients, mean age 34 years was conducted at four years follow-up. Clinical outcome was based on the Cooney clinical scoring chart. Static and dynamic x-rays of the wrist were studied. The dislocations were: type I=9, type IIa=5, type II=1 according to the Alnot classification. The scaphoid fractures were: types III and IV=13, type II=2. A dorsal approach was used for six cases, an anterolateral approach for four and a double approach for five. The carpal tunnel was opened in seven cases. The scaphid fracture was fixed by pins in eleven cases, by screws in four, and associated with a corticocancellous graft in five. The carpus was fixed in seven cases with scapholunate pins, with lunotriquetral pins in seven, and radiolunate pins in three. Results: Mean score was 70±20% with mean flexion 50±17° and mean extension 54±20°. Grip force was 32/45±11 (Jamar). The thumb-index force was 14±5.1. Pain was negligible in 33% of the patients and was disabling in 17%. Climatic pain was reported by 50% of patients; 75% were able to resume their occupational activities. Radiographically we found osetonecrosis of the lunate (n=1), osteonecrosis of the proximal pole of the scaphoid (n=2), non-union of the scaphoid (n=3), radiocarpal osteoarthritis (n=4), SLAC (n=1) and SNAC (n=2). Discussion: Our outcomes were slightly less favourable than those reported in the literature concerning joint motion. Conversely, for pain, duration of sick leave, and percentage of occupational reclassing, our results were the same as reported in the literature. The series shows that radiographic outcome was favourable with 13% radiocarpal osteoarthritis (38% for Herzberg in 2002 at 96 months. The stability of the scaphoid osteosynthesis remains the key to success (two nonunions for four single pin fixatons). A new analysis at longer follow-up would be interesting to determine the arthrogenic results

Purpose: We report the long-term outcome after treatment of scaphoid nonunion using a graft harvested on the anterior aspect of the radius and vascularised with the anterior carpus artery. Material and methods: We treated 72 patients, 11 women and 61 men. Mean age was 31.4 years (15–61) and mean delay from initial fracture of the scaphiod to treatment of nonunion was 22 months (4–120 months). Twenty-seven patients had had prior tratments (11 Mati-Russe, 16 screw fixations). Alnot classification was 40 grade 2A, 28 grade 2B and 4 grade 3A. the patients were generally treated as out-patients under locoregional anaesthesia. A single approach was needed. After reduction and fixation of the scaphoid, the graft was harvested from the anterior aspect of the radius and inserted in the bone gap, usually fixed with a temporary pin. A palmar brace was maintained until bone healing. Results: Bone healing was achieved in 66 patients (91.6%). Mean delay to healing was 9.8 weeks (6–24). Pain relief was achieved in all patients; 59 were completely pain free. Mean flexion improved from 45° to 56° and mean extension from 54° to 65°. Muscle force improved from 50% to 90% of the healthy side. There were three cases of reflex dystrophy, two cases of styloid radial osteoarthritis and three cases of postoperative stiffness requiring secondary arthrolysis. Functional outcome was excellent in 46 patients, good in 13, fair in 9 and poor in 4. Discussion: The vascularised graft advocated by Judet as early as 1964 has proven its efficacy for repeated nonunions of the scaphoid. In our series, there was a direct correlation between the grade of the nonunion and the final outcome, the best results being obtain for grade 2A. Conclusion: Use of a bone graft vascularised with the anterior carpus artery only requires on approach, and provides a high rate of bone healing. We recommend this method for first line treatment of nonunion of the scaphoid

Introduction: Image based navigation is able to increase precision and reduce intraoperative radiation time in drilling procedures in orthopeadic trauma indications. Due to specific anatomic conditions and necessary adequate fluoroscopic visualizing, specific indications need intraoperative 3-D fluoroscopy based navigation modalities. This kind of navigation has already been successfully used in several orthopaedic interventions. The complex anatomic structure of the scaphoid, the suggested minimal invasiveness and misplacement rates of the screws make 2-D based fluoroscopic navigation impossible. Missing options for a stable reference marker fixation at the scaphoid or carpus did not allow an intraoperative registration for the navigation. We report about the development of an adequate non invasive fixation technique of the reference marker for navigated interventions and the first implementation of 3-D fluoroscopy based scaphoid screws. Materials and method: Fixation of the reference marker was achieved by immobilisation of the complete hand and forearm in maximum dorsal extension of the wrist. We used a completely new developed radiolucent hand fixation device (HFD) fixed nonivasively to the carpus and a conventional navigation system (Brainlab, Germany) in combination with 3-D fluoroscopic imaging (Iso-C, Siemens, Germany). Tests were done on 10 intact specimen and the process included the initial drilling and final placement of an osteosynthetic screw. Postoperative placement was controlled with a 3-D scan. Results concerning a defined optimal screw positioning and drill failures attempts were done by another independent surgeon. Results: All 3-D scans were done without complications. The multiplanar reconstructions allowed a proper visualisation of the scaphoid in all cases. No additional movement of the fixed extremity occurred during the operation. No registration failures were detected. An optimally defined screw placement in the scaphoid was achieved in 9 cases. Two repeated drill attempts were necessary in one case, another case needed three drill attempts. The scaphoid was never perforated. Discussion: Our development of a new immobilizing device for the complete hand and forearm allows proper use of 3-D fluoroscopy based navigation at the scaphoid including a placement of an osteosynthetic screw. Further movements of the hand or fingers are intraoperatively only possible after the definite drill placement has been performed. The 3-D imaging modality allows a direct control of the reduction and screw placement intraoperatively. Our tests did not include simulated fracture conditions, a general use of our new technique can now only be implemented to non displaced fracture types, while clinical and further laboratory tests have to improve our findings for all types of scaphoid fractures

Aims

Occult (clinical) injuries represent 15% of all scaphoid fractures, posing significant challenges to the clinician. MRI has been suggested as the gold standard for diagnosis, but remains expensive, time-consuming, and is in high demand. Conventional management with immobilization and serial radiography typically results in multiple follow-up attendances to clinic, radiation exposure, and delays return to work. Suboptimal management can result in significant disability and, frequently, litigation.

Aims

This observational cross-sectional study aimed to answer the following questions: 1) how has nonunion incidence developed from 2009 to 2019 in a nationwide cohort; 2) what is the age and sex distribution of nonunions for distinct anatomical nonunion localizations; and 3) how high were the costs for surgical nonunion treatment in a level 1 trauma centre in Germany?

Aim:. To assess the clinical outcomes of patients that had perilunate or lunate dislocations treated with either open or closed reduction and wiring without repair of the scapholunate interosseous ligament (SLIL). Background:. Current literature states that acute perilunate dislocations should be treated with open reduction and repair of the dorsal scapholunate ligament. This is to prevent dissociative carpal instability and potential long term degenerative arthrosis. Methods:. A retrospective review of patients who sustained a perilunate or lunate dislocation, with no associated radial or carpal fracture was conducted. All were treated by reduction and percutaneous wiring without repair of the SLIL. Patients were examined and data was collected regarding patient's pain, range of motion, grip strength, instability and return to work. All patients had a Mayo wrist score. Pre and post-surgical radiographs were assessed and the scapholunate distance, scapholunate angle and the radiolunate angle were measured. The presence of a high riding scaphoid and osteoarthritis was recorded. Results:. A total of 13 patients were included in the study, with an average follow up of 32 months. 92% of patients had no pain in their wrist at final follow up. Range of movement was 78% of the normal side. 70% of patients returned to work. 92% of patients had no clinical wrist instability. Grip strength was 82% of the opposite side. Radiographic assessment showed an average scapholunate distance of 2.6 mm, a scapholunate angle of 65° and radiolunate angle of 11°. One of the 13 patients had a high riding scaphoid. 23% of patients had arthritic changes of the carpus on plain radiographs. Of the 13 patients, 3 had excellent mayo scores, 4 good, and 6 fair. No patients had poor scores. Of the 13 patients reviewed 10 returned to work, those that did not were not able to due to other disabilities acquired at the time of their accident. Conclusion:. Acute management of perilunate dislocations with reduction and percutaneous wiring without repair of the SLIL, resulted in the majority of patients having a pain free, stable, mobile wrist with an above average Mayo wrist score and no arthritic change on radiographic assessment

The ligamentous anatomy of the carpus has been well described in recent years. This presentation will review the most important fundamental aspects of carpal anatomy, the presentation and clinical evaluation of the injured wrist, and the management of the most common carpal abnormalities. Specifically, acute and chronic scapholunate instability, dynamic scapholunate instability, and perilunate dislocations will be reviewed. In addition, the characteristic sequence of scapholunate advanced collapse arthritis and its recommended treatment will be described

Acute osteomyelitis of the radius or ulna in children is rare and may be associated with complications including pathological fracture, growth disturbance and cosmetic problems. Purpose:. To highlight the outcome of acute pyogenic osteomyelitis of the forearm bones in children. Methods:. Eleven children were treated for osteomyelitis of the radius (6) and ulna (5) over 15 years. Staphylococcus aureus was cultured following initial incision and drainage. Two had signs of compartment syndrome. Late complications included gap defects of 2–6 cm (radius 1 and ulna 2). Larger defects with physeal involvement were seen in the distal ulna (4) proximal radius (1) and whole radius (1). The late clinical features included pseudarthrosis (9), distal radioulnar instability (3), radial head dislocation (3) and “radial clubhand” type deformity (1). Treatment:. Gap defects <2 cm were filled with autogenous grafts (3). Segmented iliac crest grafts threaded over a K wire were used in 1 patient with an 8 cm gap defect. Radio-ulnar synostosis was performed in 4 cases. The carpus was centralized onto the ulna in 1 child. Results:. Reconstructive grafts healed by 6–12 weeks. Residual elbow contracture <30° occurred in 3 children. Ten children had improved grip strength and stability of the wrist and elbow and forearm length was decreased by 2–5 cm. The child with a radial clubhand deformity had severe shortening and stiffness of the hand. Conclusion:. Osteomyelitis of the forearm bones can be missed and present late. Complications include disproportionate growth, proximal or distal radio-ulnar instability and radial clubhand type deformity. Treatment is challenging requiring reconstruction of gap defects. Radio-ulnar synostosis is a useful salvage procedure to improve function and cosmesis

EH of bone is a rare vascular neoplasm, subtype of hemangioendothelioma, characterized by mesenchimal cells that have an epithelioid endothelial appearance. There are different kinds of EH: the benign epithelioid hemangioma, and the malignant epithelioid angiosarcoma. This tumors can occurs in soft tissue, lung, liver and bones and often are multicentric. EH generally involve the bone of the spine and lower limb and is very rare in the upper limb and the hands. The main symptom is pain; pathological fracture may occur in aggressive lesions. Radiographically the EH is a ostelytic lesion with variable peripheral sclerosis, cortical destruction and periosteal new bone. Treatment of EH is curettage and local adjuvants in benign lesion, en bloc resection in the low-grade forms and wide or radical surgery in the high-grade forms. Radiation therapy is suggest in inoperable situations. In the present report we describe the clinical features, the oncological treatment and the reconstructive solutions of two cases of EH of the hand treated in the Orthopedic Oncological Center of Gaetano Pini Institute of Milan. Both cases had multiple locations in the carpus, metacarpus and phalanges. The involvement of more joints caused a delayed diagnosis (> 1 year). Exer-esi and reconstruction of several segments of the wrist and hand has led to considerable technical difficulties resolved with the collaboration of the microsurgeon and plastic surgeon

Lesions of the fibrocartilaginous triangle of the carpus (FCTC) and lunatopyramidal (LP) instability are the most frequently treated situations involving ulnar instability of the wrist. Most publications to date have examined results obtain for the treatment of isolated lesions, few have reported associated injuries. Outcome could be better in terms of pain relief: 25–64% of pain-free results for the treatment of FCTC and unpredictable results for the treatment of LP instability. Considering the column theory proposed by Navarro-Taleisnik we have developed a concept based on fixation of the pyramidal and an adaptation of the Mayfield lines (where kinetic energy is considered exclusively on the ulnar side); we present here what we call the «peripyramidal ring lesion». In our series of surgical cases, pain-free outcome for combined ulnar lesions treated as FCTC lesions was achieved in 48% of cases. For cases treated as LP instability, the rate was 71.4%. Many combinations are underdiagnosed: pyramidal-median hamate, pyramidal-pisiform. By treating these combined lesions we have increased the rate of excellent results from 64% to 91% for FCTC and obtained 86% pain-free wrists for LP instability