[Differences in injury patterns in motorcycle accidents involving children and adolescents]. / Unterschiede der Verletzungsmuster bei Motorradunfällen von Kindern und Jugendlichen.

BACKGROUND: Traffic accidents and the traumatic injury consequences are frequent causes of mortality and irreversible damage in children and young adults. In motorcycle accidents the injury patterns differ depending on the age of the patient. OBJECTIVE: The aim of this study was to describe the typical injury patterns after motorcycle accidents involving children and adolescents as these can have a decisive influence on the prevention and the adequate treatment in the respective patient groups. MATERIAL AND METHODS: The study included 22,923 patients from the years 2002-2018 which were extracted from the TraumaRegister DGU®. Injury patterns of 4 age categories were analyzed: group 1 (4-15 years), group 2 (16-17 years), group 3 (18-20 years) and group 4 (21-50 years). RESULTS: In both younger age groups, limb injuries mostly of the lower extremities, showed the highest incidence. Moreover, younger patients with traumatic brain injury showed better outcomes despite of initially poor conditions. Ribcage, abdominal, pelvic and spinal injuries are the least frequent in younger patients. In terms of diagnostics, children are less likely to undergo whole-body computed tomography (CT) diagnostics than adults. CONCLUSION: The study revealed age-specific differences with respect to injury patterns in patients involved in motorcycle accidents, either as drivers or co-drivers. Furthermore, the analysis of preclinical and in-hospital treatment elucidated the relevance of preventive and protective measures.

[Implications of prehospital estimation of trauma patients for the treatment pathway-An evaluation of the TraumaRegister DGU®]. / Implikationen der prähospitalen Einschätzung des Traumapatienten auf den Behandlungsverlauf ­ Eine Auswertung aus dem TraumaRegister DGU®.

BACKGROUND: In the prehospital acute treatment phase of severely injured patients, the stabilization of the vital parameters is paramount. The rapid and precise assessment of the injuries by the emergency physician is crucial for the initial treatment and the selection of the receiving hospital. OBJECTIVE: The aim of this study was to determine whether the prehospital emergency medical assessment has an influence on prehospital and emergency room treatment. MATERIAL AND METHODS: Data from the TraumaRegister DGU® between 2015 and 2019 in Germany were evaluated. The prehospital emergency medical assessment of the injury pattern and severity was recorded using the emergency physician protocol and compared with the in-hospital documented diagnoses using the abbreviated injury scale. RESULTS: A total of 47,838 patients with an average injury severity score (ISS) of 18,7 points (SD 12.3) were included. In summary, 127,739 injured body regions were documented in the hospitals. Of these, a total of 87,921 were correctly suspected by the emergency physician Thus, 39,818 injured body regions were not properly documented. In 42,530 cases a region of the body was suspected to be injured without the suspicion being confirmed in the hospital. Traumatic brain injuries and facial injuries were mostly overdiagnosed (13.5% and 14.7%, respectively documented by an emergency physician while the diagnosis was not confirmed in-hospital). Chest injuries were underdocumented (17.3% missed by an emergency physician while the diagnosis was finally confirmed in-hospital). The total mortality of all groups was very close to the expected mortality calculated with the revised injury severity classification II(RISC II)-score (12.0% vs. 11.3%). CONCLUSION: In the prehospital care of severely injured patients, the overall injury severity is often correctly recorded by the emergency physician and correlates well with the derived treatment, the selection of the receiving hospital as well as the clinical course and the patient outcome; however, the assessment of injuries of individual body regions seems to be challenging in the prehospital setting.

Closed continuous Irrigation for the Therapy of Pyogenic Flexor Tenosynovitis.

BACKGROUND/PURPOSE: Pyogenic flexor tenosynovitis within the flexor tendon sheath requires urgent treatment to avoid tendon necrosis and loss of the finger. Objective of this article is the treatment by revision and postoperative continuous irrigation via a closed irrigation system. PATIENTS AND METHODS: From 1.1.2007 to 31.12.2016 54 patients with a pyogenic flexor tenosynovitis were treated by revision and closed continuous irrigation. Besides the evaluation of the patient´s records with respect to the involved fingers and hand, duration of hospitalisation, and required revision surgery, 33 patients (19 males, 14 females) with an average age of 51 (8-85) years were re-examined on average after 21 (4-38) months. Re-examination included measurements of the mobility of the involved fingers and thumbs, grip and pinch strength, pain using the numeric rating scale (BRS), and DASH score. The overall result was graded according to the grading system by Buck-Gramcko for flexor tendon reconstruction. RESULTS: Hospital stay was 9 (3-26) days on average. In 11 patients revision surgery was required including 3 re-installations of the continuous irrigation system, 2 ray amputations, and 1 finger amputation at the level of the proximal interphalangeal joint. The re-examined patients averaged a grip strength of 84 (23-163) % of the unaffected side. On average pain at rest was 0,2 (0-4), pain at daily living activity 1,2 (0-8) on the NRS, the DASH score 16,8 (0-58) points. According to the rating system for flexor tendon function there were one poor, one fair, 5 good and 26 excellent results. CONCLUSIONS: Continuous irrigation by a closed irrigation system for pyogenic flexor tenosynovitis is a successful procedure with a low amputation rate. The functional results are predominantly good and excellent.

Health care utilization and excess costs after pelvic fractures among older people in Germany.

Our study demonstrates a strong increase in utilization of inpatient health care and clear excess costs in older people in the first year after pelvic fracture, the latter even after adjustment for several confounders. Excess costs were particularly high in the first few months and mainly attributable to inpatient treatment. INTRODUCTION: We aimed to estimate health care utilization and excess costs in patients aged minimum 60 years up to 1 year after pelvic fracture compared to a population without pelvic fracture. METHODS: In this retrospective population-based observational study, we used routine data from a large statutory health insurance (SHI) in Germany. Patients with a first pelvic fracture between 2008 and 2010 (n=5685, 82% female, mean age 80±9 years) were frequency matched with controls (n=193,159) by sex, age at index date, and index month. We estimated health care utilization and mean total direct costs (SHI perspective) with 95% confidence intervals (CIs) using BCA bootstrap procedures for 52 weeks before and after the index date. We calculated cost ratios (CRs) in 4-week intervals after the index date by fitting mixed two-part models including adjustment for possible confounders and repeated measurement. All analyses were further stratified for men/women, in-/outpatient-treated, and major/minor pelvic fractures. RESULTS: Health care utilization and mean costs in the year after the index date were higher for cases than for controls, with inpatient treatment being particularly pronounced. CRs (95% CIs) decreased from 10.7 (10.2-11.1) within the first 4 weeks to 1.3 (1.2-1.4) within week 49-52. Excess costs were higher for inpatient than for outpatient-treated persons (CRs of 13.4 (12.9-13.9) and 2.3 (2.0-2.6) in week 1-4). In the first few months, high excess costs were detected for both persons with major and minor pelvic fracture. CONCLUSION: Pelvic fractures come along with high excess costs and should be considered when planning and allocating health care resources.

[Extensor tendon injuries at the level of the proximal interphalangeal joint]. / Strecksehnenverletzungen in Höhe des Mittelgelenks.

Closed and open injuries of the extensor mechanism at the proximal interphalangeal (PIP) joint can involve the central slip, the lateral slips or both. They are classified as zone III injuries. All open injuries on the dorsal side of the PIP joint should raise suspicion of an extensor tendon injury that is frequently overlooked. The operative strategy consists of wound revision with extensor tendon suture or refixation of the central slip. Acute closed central slip injuries are clinically diagnosed (Elson test) after ruling out bony injuries to the joint. Nondisplaced avulsions of the central slip insertion or lacerations can be treated nonoperatively by splinting. For displaced avulsions and complex injuries the treatment is surgical. In overlooked injuries a typical deformity (buttonhole/Boutonnière deformity) develops within 1-2 weeks that is characterized by an extension lag of the PIP joint and hyperextension at the distal interphalangeal joint. In early cases, when passive extension is still complete (mobile buttonhole deformity) the central slip can be immediately reconstructed. In fixed deformities complete passive extension of the PIP joint has to be restored before surgery by hand therapeutic measures or PIP joint release. Depending on the pattern of the injury and the resulting defects, a number of reconstructive techniques have been established that are summarized in this article. The functional results can be limited by tendon adhesions, imbalance within the reconstructed extensor apparatus and stiff joints that can all restrict the range of motion. Therefore, active rehabilitation protocols are mandatory for optimal results.

[External fixator of the wrist-temporary fixation]. / Fixateur externe am Handgelenk ­ temporäre Fixation.

OBJECTIVE: a) Fixed-angle bridging of the wrist between radius diaphysis and metacarpus by percutaneous or minimally invasively inserted threaded pins and a frame (fixator) placed above the skin level (external); b) retention of fracture fragments by ligamentotaxis; c) temporary stabilization after bone loss at wrist and distal forearm. INDICATIONS: a) Initial treatment of fractures near the wrist or soft tissue injuries in multiple trauma patients; b) fractures of the distal radius and the distal ulna; c) dislocation of the carpus; d) infections of the wrist; e) instability after resection in the wrist area; f) fractures with impending or manifest compartment syndrome; g) fractures with extensive loss of soft tissues and lacking coverage of implants. CONTRAINDICATIONS: a) Pathological changes at the site of pin application, as long as no alternative site is possible: infections, fractures, osteoporosis, tumors; b) fractures that are closed and not reduceable; c) exclusively intra-articular distal radius fractures; d) lack of compliance by the patient. SURGICAL TECHNIQUE: Insertion of two threaded pins into the radial shaft proximal to the radiocarpal joint and two pins into the second metacarpal bone. Assembly of the fixator frame in advance of the definitive reduction. Subsequently, final reduction and fixation in the desired position by tightening of the screws on the fixator frame. POSTOPERATIVE MANAGEMENT: Pin care and changes of wound dressing every 2-3 days RESULTS: Reliable, low complication procedure for temporary fixation of the wrist for many indications.

Loosening of total knee arthroplasty - always aseptic?

PURPOSE: When revision surgery is needed in total knee arthroplasty (TKA) the most frequent reasons are aseptic loosening (AL) and periprosthetic joint infection (PJI). However preoperative distinction between AL and PJI remains challenging. Aim of this study is to determine the incidence of PJI in patients with suspected AL after TKA and to evaluate a diagnostic algorithm for reliable differential diagnosis. METHODS: In this study a total of 149 symptomatic patients with radiographic signs of prosthetic loosening and suspected AL were included. Preoperatively all patients underwent a standardized diagnostic algorithm. For each patient demographics, as well as the results of laboratory and microbiological testing were collected from the medical records. RESULTS: Of the included patients 117 (78.5%) were diagnosed with AL and 32 (21.5%) with PJI. The latency period from primary arthroplasty to the presentation with symptomatic implant loosening was significantly shorter for PJI compared to AL (p < 0.05). The initial CRP values were significantly higher in patients with PJI compared to patients with AL (p < 0.05). Elevated count of white blood cells or percentage of neutrophils within the synovial fluid support the diagnosis of PJI. The sensitivity of synovial cell count (CC) count for PJI in patients with radiographic signs of loosening was 0.84 (CI 0.81-0.87) with a specificity of 0.96 (CI 0.92-0.98). The single best measure for the diagnosis of PJI was synovial fluid cultures with a specificity of 1, however this measure provides poor sensitivity. CONCLUSION: Patients with radiographic signs of loosening in TKA need thorough diagnostics. Information about primary TKA, serological testing, and results of joint aspiration can rule out a PJI in most cases.

Possible risk factors for acute and chronic deep periprosthetic joint infections in primary total knee arthroplasty. Do BMI, smoking, urinary tract infections, gender, and ASA classification have an impact?

PURPOSE: Aim of this retrospective study was to evaluate the impact of the patient related factors body mass index (BMI), urinary tract infection, current smoking, gender, and American Society of Anesthesiologists (ASA) classification on the incidence of acute and chronic deep periprosthetic joint infections (PJI) in total knee arthroplasty (TKA). METHODS: All patients undergoing revision surgery for a deep PJI of primary TKA between July 2012 and December 2016 were included in this study. All relevant data was collected from the medical records. Acute deep PJI was defined when PJI was diagnosed within the first 6 weeks after primary TKA, chronic PJI was defined when patients demonstrated PJI later than 6 weeks after primary TKA. RESULTS: A total of 57 patients was included in this study with 13 cases of acute PJI and 44 of chronic PJI. Overweight patients (BMI > 25 kg/m2) represent a significantly larger proportion in both PJI groups (p < 0.05). Current smokers had an significantly increased risk for acute and chronic PJI (p < 0.05). In the acute PJI group 46.2% patients had an postoperative urinary tract infection. CONCLUSION: An elevated BMI (>25 kg/m2), current smoking and urinary tract infection are possible risk factors for acute and chronic deep PJI. After primary TKA screening for urinary tract infection is recommendable to prevent predominantly acute deep PJI.

[Scaphoid pseudarthrosis : Complex reconstruction using vascularized bone grafts]. / Skaphoidpseudarthrose : Komplexe Rekonstruktionen mithilfe vaskularisierter Knochentransplantate.

The most important goals of scaphoid reconstruction in pseudarthrosis are correction of the humpback deformity, the realignment of the proximal carpal row and the bony union of the scaphoid. Therefore, in most cases bone grafting is required. To increase the healing rate and to improve vascularization, several kinds of vascularized bone grafts have been developed. Pedicled grafts are preferably harvested from the dorsal or palmar side of the distal radius with fusion rates between 27% and 100%. Free microvascular grafts can be obtained from the iliac crest and the medial or lateral femoral condyle with fusion rates between 60% and 100%. For their application microsurgical equipment and skills are required. Up to now osteochondral grafts from the femoral condyle offer the only chance for joint surface replacement by transferring part of the surface of the femoropatellar joint. The use of vascularized grafts is still a matter of controversy, since their superiority is still unproven compared to nonvascularized grafts, which also achieved 100% fusion rates in several series. They are indicated in secondary procedures after failed reconstruction and nonunion with small avascular proximal pole fragments. Since no evidence-based guidelines exist, this article provides an experience-based treatment algorithm for scaphoid nonunion with special consideration to vascularized bone grafts.

[Resuscitation room management for trauma patients]. / Schockraummanagement bei traumatologischen Patienten.

Resuscitation rooms in central emergency admissions are the first point of contact for potentially severely or multiply injured patients. Here priority is given to the interdisciplinary treatment of these patients, which includes the structured and standardized hospital admission as well as the appropriate initial diagnostics and treatment of potentially life-threatening conditions. The resuscitation room is a central vital link between the prehospital and internal hospital treatment chain. This article describes the core tasks of the resuscitation room team as well as concepts and strategies of initial treatment of severely injured and polytrauma patients.

[Evaluation of driving fitness in patients with musculoskeletal disorders : A systematic review]. / Empfehlungen zur Fahrtauglichkeit bei Erkrankungen des Bewegungs- und Stützapparates : Ein systematisches Review.

OBJECTIVE: Driving a motor vehicle is one of the most important aspects of personal mobility in our society. However, there is a lack of evidence regarding driving fitness after orthopedic or trauma surgery-related diseases. Aim of this systematic review was to support the treating physician to determine the individual driving fitness in patients with musculosceletal disorders. MATERIAL AND METHODS: A systematic analysis was performed using the PubMed database. Following a predefined algorithm, all relevant articles published from 2013 to 2018 were included. RESULTS: The results were categorized according to the affected part of the body into I. lower extremity and II. upper extremity. Also, results were subcategorized into movement restrictions caused by external joint-braces, musculoskeletal diseases, and postoperative conditions. CONCLUSION: This article supports the treating physician to individually determine the driving fitness in patients with musculoskeletal disorders. However, only a few standardized tests exist to individually determine the driving fitness in patients with musculoskeletal disorders. A particular shortcoming was observed for impairments of the upper extremity.

[Reconstruction of the middle phalangeal base of the finger using an osteocartilaginous autograft from the hamate]. / Rekonstruktion der Mittelgliedbasis am Finger durch ein osteochondrales Transplantat vom Os hamatum.

OBJECTIVE: Restoration of proximal interphalangeal joint stability with preservation of mobility by reconstruction of the middle phalanx base using an osteochondral graft from the carpometacarpal joint surface of the hamate. INDICATIONS: Acute and older isolated destruction of the palmar middle phalanx base >25%. CONTRAINDICATIONS: Destruction of the head of the proximal phalanx, advanced chondropathia of the head of the proximal phalanx, extensive soft tissue injury with loss of skin coverage at the proximal interphalangeal joint. SURGICAL TECHNIQUE: The fractured middle phalangeal base is debrided and the defect is replaced by a size-matched autograft from the dorsal carpometacarpal hamate osteoarticular surface that is secured in place with miniscrews. POSTOPERATIVE MANAGEMENT: Immobilization for 2 weeks in a below-elbow cast in intrinsic plus position. Subsequent immobilization by a splint including the distal and proximal interphalangeal joint. RESULTS: Healing was achieved in 100% with restoration of joint congruity in 12 of 13 cases and slight subluxation in 1 case. Follow up was possible in 9 cases after 22 ± 16 (5-51) months. The average range of motion in the reconstructed joint achieved 0/9/73°, grip strength 82% of the unaffected side. Of the 9 patients, 5 developed a mild flexion contracture of the proximal interphalangeal joint. The DASH score achieved 4 ± 3 (0-8) points, pain at rest was 1 ± 2 (0-5), pain at exercise 2 ± 2 (0-5) on a visual analogue scale (0-10). All patients were satisfied and willing to undergo the procedure again. According to the literature, reconstruction of the base of the middle phalanx by using an osteochondral graft from the hamate is a reliable procedure to restore stability and mobility of the joint.

Primary cemented bipolar radial head prostheses for acute elbow injuries with comminuted radial head fractures: mid-term results of 37 patients.

BACKGROUND: Radial head arthroplasty represents a widely accepted treatment for elbow injuries with non-reconstructible radial head fractures. The aim of this retrospective multicenter study was to assess mid-term results of patients with clearly defined elbow injuries including type III fractures of the radial head according to Mason's classification type III after primary arthroplasty using a cemented bipolar design. MATERIALS AND METHODS: In 45 cases a primary cemented bipolar arthroplasty of the radial head was implanted for elbow injuries combined with an acute Mason type III radial head fracture. In all patients associated fractures were detected with preoperative CT scans and ligamentous injuries were evaluated and both were addressed intraoperatively based on a standardized algorithm. Patients with associated injuries other than coronoid fractures and collateral ligament tears were excluded from this study to obtain a more homogenous sample. Clinical and radiological assessment was performed on thirty-seven patients at an average of 5.6 years postoperatively. RESULTS: DASH Score, functional rating index of Broberg and Morrey, Mayo Elbow Performance Score, and Mayo Modified Wrist Score confirmed good-to-excellent results in most of the patients. Compared to the unaffected arm range of motion and grip strength were slightly reduced. No elbow instability or loosening of the prosthesis, and minor degenerative changes were detected in a few cases. CONCLUSION: Primary cemented bipolar arthroplasty for type III fractures according to Mason's classification in an elbow injury pattern only including associated coronoid fractures and/or ligamentous tears resulted in good-to-excellent mid-term results. These results suggest that primary bipolar radial head arthroplasty combined with distinct treatment of all associated injuries provides good functional outcomes concerning range of motion, elbow stability, and strength in this cohort. However, the associated injuries may influence clinical and radiological outcome and need to be detected, classified, and treated carefully.

[Distal radius fractures : Current treatment concepts and controversies]. / Die distale Radiusfraktur : Aktuelle Behandlungskonzepte und Kontroversen.

Distal radius fractures represent the most frequent bone fractures in humans. Although the treatment was dominated for decades by conservative measures or closed surgical procedures, such as percutaneous wire osteosynthesis, a paradigm shift was instigated by the introduction and rapid dissemination of volar locking plate osteosynthesis (VLP). The novel procedure was soon proclaimed to be the gold standard and applied for practically all forms of fractures of the distal radius. In addition to clinical mishaps, e.g. failure to address dorsal edge fragments or the occurrence of extensor and flexor tendon irritation, the publication of various prospective randomized studies and meta-analyses led to a certain degree of disillusionment. In comparison to percutaneous wire osteosynthesis, no differences in the clinical result could be established for VLP 1 year postoperatively. It was therefore obvious that not all problems of the distal radius could be solved using the innovative instrument of volar locking plates. This article gives an overview on the current insights and reflects the current expert opinion on the present concepts for the treatment of distal radius fractures. This is illustrated by comprehensive case presentations.

[Arthroscopy of the distal radioulnar joint]. / Die Arthroskopie des distalen Radioulnargelenks.

OBJECTIVE: The aim of the procedure is to visualize the proximal pouch of the DRUJ, the joint surfaces of the sigmoid notch and the ulnar head, the convexity of the ulnar head and the proximal ulnar side surface of the triangular fibrocartilage complex (TFCC). INDICATIONS: Arthroscopy of the distal radioulnar joint is applied for the evaluation of joint pathologies in ulnar-sided wrist pain, especially in cases without diagnostic findings in standard X­rays and MRIs and arthroscopically assisted procedures. SURGICAL TECHNIQUE: In vertical extension, two portals of the wrist are created on the dorsal side of the DRUJ between the extensor digiti minimi and extensor carpi ulnaris tendons. By insertion of a small joint arthroscope via these portals visualization of the ulnar head, the sigmoid notch, the proximal pouch of the DRUJ and the proximal surface of the TFCC is accomplished. CONCLUSIONS: Arthroscopy of the DRUJ is a rarely and not routinely performed procedure for the diagnosis and therapy of ulnar-sided wrist pain. It is technical demanding with a flat learning curve and anatomy-related obstacles. A complete view of the joint is not always accessible. Rare complications are injuries of the extensor digiti minimi tendon, as well as contusion or sectioning of the transverse branch of the dorsal branch of the ulnar nerve. In distinct cases, this procedure offers important additional information about the distal radioulnar joint. The procedure is especially valuable for the detection of proximal TFCC injuries that are missed otherwise.

[Etiology, diagnostics and classification of lunate bone necrosis]. / Ätiologie, Diagnostik und Klassifikation der Lunatumnekrose.

Kienböck's disease, also known as avascular necrosis of the lunate bone describes the slowly progressive osteonecrosis of the lunate bone with secondary development of osteoarthritis and carpal collapse. In order to emphasize the atraumatic origin of the disease, this is normally referred to as aseptic, idiopathic or avascular lunate necrosis. There are thought to be a number of factors predisposing to Kienböck's disease, such as ulnar negative variance, the shape of the lunate itself and various types of vascular anatomy. The ongoing development of radiographic techniques in recent years has contributed to a better understanding of the progression of the disease and led to a modification of the standard classifications. New sophisticated classification methods provide the basis for a differentiated treatment. This article provides an overview of the current state of knowledge about the etiology and pathogenesis as well as the clinically relevant diagnostic procedures and classifications.

[Treatment of necrosis of the lunate bone]. / Therapie der Lunatumnekrose.

BACKGROUND: There still is no standard therapy that predictably results in healing of avascular necrosis of the lunate bone. Nevertheless, there exists a wide spectrum of operative treatment options for different stages. OBJECTIVE: This article reviews the treatment options for necrosis of the lunate bone and proposes algorithms based on the age of the patient and condition of the lunate bone and the wrist. METHODS: Surgical treatment options for necrosis of the lunate bone can be divided into relieving or revascularization procedures and salvage procedures. RECOMMENDATIONS: For patients under 20 years old the treatment of choice is prolonged immobilization, in cases of non-response or progression, minimally invasive and relieving procedures are used. In adult patients with limited affection of the lunate bone the first therapeutic approach should also be immobilization. If in progressive disease or advanced stages only the lunate bone is compromised but reconstructable, restoration should be considered. In progressive collapse of a non-reconstructable lunate bone the therapeutic efforts shift to mobility-preserving procedures utilizing still functional articulations of the wrist. If all functional articulations are lost only classical salvage procedures are feasible. CONCLUSION: According to the presented algorithms a stage-dependent therapy of necrosis of the lunate bone is possible. It should not be ignored that there are still no scientific and evidence-based arguments for some of these treatment options. This is also true for maximally invasive procedures, where superiority to more simple procedures have not been proven. Therefore, their application should be restricted and based on an individual decision.

The challenge of Monteggia-like lesions of the elbow: mid-term results of 46 cases.

AIMS: The aim of this retrospective multicentre study was to evaluate mid-term results of the operative treatment of Monteggia-like lesions and to determine the prognostic factors that influence the clinical and radiological outcome. PATIENTS AND METHODS: A total of 46 patients (27 women and 19 men), with a mean age of 57.7 years (18 to 84) who had sustained a Monteggia-like lesion were followed up clinically and radiologically after surgical treatment. The Mayo Modified Wrist Score (MMWS), Mayo Elbow Performance Score (MEPS), Broberg and Morrey Score, and Disabilities of the Arm, Shoulder and Hand (DASH) score were used for evaluation at a mean of 65 months (27 to 111) postoperatively. All ulnar fractures were stabilized using a proximally contoured or precontoured locking compression plate. Mason type I fractures of the radial head were treated conservatively, type II fractures were treated with reconstruction, and type III fractures with arthroplasty. All Morrey type II and III fractures of the coronoid process was stabilized using lag screws. RESULTS: Good results were found for the MMWS, with a mean of 88.4 (40 to 100). There were 29 excellent results (63%), nine good (20%), seven satisfactory (15%), and one poor (2%). Excellent results were obtained for the MEPS, with a mean of 90.7 (70 to 100): 31 excellent results (68%), 13 good (28%), and two fair (4%). Good results were also found for the functional rating index of Broberg and Morrey, with a mean score of 86.6 (57 to 100). There were 16 excellent results (35%), 22 good (48%), six fair (13%), and two poor (4%). The mean DASH score was 15.1 (0 to 55.8). Two patients had delayed wound healing; four patients had nonunion requiring bone grafting. One patient had asymptomatic loosening of the radial head prosthesis. CONCLUSION: Monteggia-like lesions are rare. With correct identification, classification, and understanding using CT scans followed by appropriate surgical treatment that addresses all components of the injury, good to excellent mid-term results can be achieved. Cite this article: Bone Joint J 2018;100-B:212-18.

[Arthrodesis of the trapeziometacarpal joint]. / Die Arthrodese des Daumensattelgelenks.

OBJECTIVE: Bony fusion of the trapeziometacarpal joint. INDICATIONS: High demands concerning stability and strength of the thumb in primary or secondary osteoarthritis (e.g., posttraumatic osteoarthritis following injuries to the carpometacarpal joint of the thumb); instability in the absence of osteoarthritis due to malformations, ligamentous laxicity, and joint hypermobility; malformations; improvement of hand function in neurological disorders; salvage procedure after carpometacarpal arthroplasty provided bone stock is sufficient. CONTRAINDICATIONS: Osteoarthritis or stiffness of adjacent joints, activities demanding maximal mobility of the thumb, insufficient bone stock. SURGICAL TECHNIQUE: Resection of the articular surfaces of the trapeziometacarpal joint via a dorsal approach. After temporary K­wire transfixation, application of a dorsal T­shaped plate (fixed angled or not), replacement of the K­wire with a lag screw. POSTOPERATIVE MANAGEMENT: Immobilization for 8 weeks (radial below-elbow cast including the thumb metacarpophalangeal joint); standard radiographs on second postoperative day and after 8 weeks; removal of stitches after 2 weeks; with bony healing after removal of the cast, guided exercises to increase strength and mobility; full loading for manual tasks after 3 months. RESULTS: With regards to strength, stability, and pain reduction, results are rated as good and excellent with a high degree of patient satisfaction. Disadvantages are implant-related complications and nonhealing of the fusion in an average of 13% of patients. Nevertheless, the procedure is still indicated in young manual workers who tolerate some limitations of mobility.