Ulnar shortening osteotomy as a treatment of symptomatic ulnar impaction syndrome after malunited distal radius fractures.

A malunited distal radius fracture can lead to symptomatic ulnar impaction syndrome, which is a common cause for ulnar-sided wrist pain. If conservative treatment fails and symptoms persist after an arthroscopic ulnocarpal debridement, ulnar shortening osteotomy (USO) is the treatment of choice. Since the first USO described by Milch in 1941 after a malunited Colles fracture, many techniques have been described varying in surgical approach, type of osteotomy and osteosynthesis material used. Many studies demonstrated good to very good functional results after USO, reporting, however, a delayed union or non-union rate up to 18%. A modern, low profile, locking plate showed in our short-term study very good functional results and no implant-associated complications, in particular no non-union.

Risk factors for reoperation in primary hand infections: a multivariate analysis.

INTRODUCTION: Severe hand infection might cause severe morbidity including stiffness, contracture and possibly amputation. The purpose of this study was to analyse the current epidemiology of adult acute hand infections in a European Hand Surgery Centre and to identify risk factors for secondary surgery. MATERIALS AND METHODS: We retrospectively analyzed a cohort of 369 consecutive patients with primary infection of the hand that were admitted to our department and required operative treatment. The following variables were recorded: demographics, medical history, cause and location of infection, laboratory values, cultured microorganisms and reoperation rate. Univariate logistical regression was used to identify variables associated with reoperation and backward selection was applied to identify the final multiple variable model. RESULTS: The mean age at the time of operation was 50.5 years (SD 16.1, range 19-91) and 65.6% of patients were male. Sharp cuts or lacerations were the most common cause (29.0%) for hand infections. 81 different species were cultivated and in 47 patients (12.7%), the cultures were positive for more than one organism. Staphylococcus aureus was the most common cultured organism (19.5%). There were relatively few cases of methicillin-resistant Staphylococcus aureus (2.2%). 80 patients (21.7%) needed more than one operation. We identified three risk factors for reoperation in a multivariate analysis: an elevated value of C-reactive protein at the time of admission, involvement of multiple sites and bacterial growth in culture. CONCLUSION: The rate of infections with MRSA in this European cohort was lower compared to reports from the USA. Thus, hand surgeons should choose their empiric antibiotic therapy depending on their patient population. The knowledge of risk factors for severe hand infections might help surgeons to identify patients at risk for additional surgery early.

[Palmar angular stable plate fixation of nonunions and comminuted fractures of the scaphoid]. / Palmare winkelstabile Verplattung von Pseudarthrosen und Trümmerfrakturen des Kahnbeins.

OBJECTIVE: Stabilization of comminuted fractures and nonunions of the scaphoid with an angular stable low-profile scaphoid plate. INDICATIONS: Scaphoid nonunions with a large palmar defect, second and third surgical procedure after previous stabilization by headless compression screw (HCS). Comminuted fractures of the scaphoid that cannot be sufficiently stabilized by screws. CONTRAINDICATIONS: Radio- and midcarpal osteoarthritis, small proximal pole fragments, fragmentation of the proximal pole. SURGICAL TECHNIQUE: The scaphoid is accessed by a palmar approach. After correcting the DISI (dorsal intercalated segment instability) deformity of the lunate and humpback deformity of the scaphoid, the reduction is secured by temporary Kirschner wires. The nonunion is debrided and the bone defect filled with cancellous bone graft. Subsequently the scaphoid plate and the angular stable screw are positioned in the order to place three screws in the proximal and distal fragment of the scaphoid. Comminuted fractures of the scaphoid are fixated by temporary Kirschner wires, then the plate is positioned in the same way as nonunions. POSTOPERATIVE MANAGEMENT: Comminuted fractures and nonunions of the scaphoid are immobilized by a below-elbow cast or thermoplastic splint with inclusion of the thumb for 8 weeks. No heavy work, high-risk or contact sport activities for 12 weeks. Plate removal is recommended after 6 months or after bony healing. RESULTS: By stabilizing scaphoid nonunions with a plate, high union rates with good clinical outcome can be achieved if the indication is correct.

[Surgical treatment of ulnar impaction syndrome : Ulnar shortening osteotomy through the ulnopalmar approach using a low-profile, locking plate]. / Die operative Behandlung des Ulna-Impaction-Syndroms : Ulnaverkürzungsosteotomie mit einer winkelstabilen, Low-profile-Platte über einen ulnopalmaren Zugang.

OBJECTIVE: Extra-articular shortening of the distal ulna in order to decompress the ulnocarpal joint. INDICATIONS: Congenital or posttraumatic, symptomatic ulnar impaction syndrome. CONTRAINDICATIONS: Osteoarthritis or deformation of the distal radioulnar joint. SURGICAL TECHNIQUE: Exactly defined oblique osteotomy in the distal third of the ulna using the saw guide, closing of the osteotomy gap using the compression spindle, osteosynthesis with the locking plate. POSTOPERATIVE MANAGEMENT: Palmar forearm thermoplastic cast or splint for 3 weeks, load bearing after bony union. RESULTS: Between June 2016 and March 2018 ulnar shortening was performed in 17 patients using the new locking plate. In all, 15 patients were reevaluated with complete follow-up data. Postoperatively patients experienced significant pain reduction (Visual Analog Scale 0-10) by 65% (7 before and 2.5 after surgery; p < 0.05) and a significant improvement of function (Disabilities of Arm, Shoulder and Hand 0-100) by 49% (47 before and 24 after surgery; p < 0.05). Bony union was observed in all patients after a mean time of 4 months. Overall patient satisfaction was high.

Practicability of a locking plate for difficult pathologies of the scaphoid.

INTRODUCTION: Headless compressions screws are the most implanted devices for scaphoid fractures and nonunions. For cases when screw osteosynthesis is not possible, a special locking plate for scaphoid reconstruction has been developed. The purpose of this study was to evaluate the safety and practicability of this device for difficult scaphoid pathologies. MATERIALS AND METHODS: Between March 2010 and December 2014, 20 patients (age range 16-59 years) were treated with scaphoid locking plate osteosynthesis. In 17 cases it was due to scaphoid nonunion or delayed union and in three cases to treat a complex multi-fragmentary fracture of the scaphoid. Most of the initial fractures were located either in the proximal third (n = 9) or the middle third (n = 8) of the scaphoid. RESULTS: Mean follow-up was 14.6 ± 8.9 months (range 2-30 months). All three scaphoid fractures (100%) showed bony healing in the CT scan after 2.7 ± 0.6 months. 15 of 17 (88.2%) patients with scaphoid nonunion demonstrated bony healing in the latest CT scan at an average of 6.2 ± 8.1 months (range 2-11 months) after scaphoid reconstruction. Range of motion (extension/flexion) was 104° ± 18.4° (range 80°-150°) and about one third less than the unaffected side. The average grip strength averaged 38.2 kg on the operated side and 44.1 kg on the unaffected side after surgery. 13 plates (65%) had to be removed due to impaction of the plate or protrusion of the screws. CONCLUSIONS: This new locking device for scaphoid reconstruction seems to be a safe, useful and reliable tool in the treatment of difficult nonunions or multi-fragmentary scaphoid fractures. The practicability is convincing and satisfying fusion rates can be accomplished. However, most patients require hardware removal. We recommend using this plate as a rescue option when a stable osteosynthesis is necessary for the healing process and screw fixation has already failed or is not possible.

[Diagnostics and treatment of acute scaphoid fractures]. / Diagnostik und Therapie frischer Skaphoidfrakturen.

BACKGROUND: Fractures of the scaphoid bone are common but can easily be overlooked in standard X­rays. Inadequate diagnostics and therefore inappropriate treatment of scaphoid fractures often leads to problems in healing with formation of non-union and painful osteoarthritis of the wrist. OBJECTIVE: This review summarizes the current practical recommendations in the diagnostics and treatment of acute scaphoid fractures. METHODS: An analysis and review of selected literature including the current S3 guidelines were performed. RESULTS: The main statements are that in cases of a clinically suspected scaphoid fracture, staged diagnostics including radiographs, computed tomography (CT) and when necessary magnetic resonance imaging (MRI) should be applied to confirm or exclude a fracture. Further treatment in the case of a fracture is planned according to a CT-based classification. There are fracture types that can be treated either conservatively or operatively and there are other fracture types that always require operative fixation. The operative technique depends on the exact fracture geometry. For osteosynthesis, cannulated headless compression screws are mostly used.

[Endoprostheses of the distal radioulnar joint]. / Endoprothetik am distalen Radioulnargelenk.

BACKGROUND: A stable distal radioulnar joint (DRUJ) is mandatory for the rotation and load transmission in the forearm and wrist. Salvage procedures such as the Darrach operation, Bowers arthroplasty, and the Kapandji-Sauvé procedure include the potential risk of dynamic radioulnar instability and impingement, despite stabilizing techniques addressing the soft tissues. PROSTHESES: In an attempt to stabilize the distal forearm mechanically following ulnar head resection, various endoprostheses have been developed to replace the ulnar head. These prostheses can be used for secondary treatment of persistent complaints and unsatisfactory results after ulnar head resection, but also in the primary treatment of osteoarthritis of the DRUJ. Based on promising results concerning improvement in pain, range of motion, and grip strength, with proper indications ulnar head prostheses should be considered as a valuable treatment option for osteoarthritis of the DRUJ.

Results after arthroscopic treatment of central traumatic lesions of the triangular fibrocartilage complex.

INTRODUCTION: Injuries of the triangular fibrocartilage complex (TFCC) are of high clinical relevance; however, the clinical evidence for treatment is poor and long-term results are rarely published. The purpose of this study was to evaluate the clinical outcome of symptomatic central traumatic lesions of the TFCC (Palmer 1A) following arthroscopic debridement. MATERIALS AND METHODS: Between 2007 and 2013, 87 patients were arthroscopically diagnosed with Palmer 1A lesion and accordingly treated with debridement. Follow-up was available for 43 patients. Activities of daily living (ADLs) were measured with the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire. Pain perception was evaluated with visual analogue scale (VAS 0-10). Grip strength and wrist motion were assessed with conventional techniques using a Jamar dynamometer and a goniometer. Patient satisfaction was assessed using a questionnaire at follow-up. RESULTS: Mean follow-up was 42.5 months (range 5-70). The mean age of the patients (22 male and 21 female) at time of surgery was 41 ± 15.9 years. No major complication occurred during surgery and follow-up. The DASH score (preoperatively 49.8 ± 19.3 vs. postoperatively 14.1 ± 17.9, p < 0.05) and pain perception (VAS: preoperatively 7.2 ± 2.0 vs. postoperatively 1.4 ± 1.6, p < 0.05) improved significantly. Grip strength was satisfactory after surgery (19.6 ± 13.1). Ulnar deviation improved significantly from 29.3 ± 10.4° to 35.6 ± 8.3° (p < 0.05) and wrist flexion improved from 53.8 ± 18.9° to 67.4 ± 12.9° (p < 0.05). Wrist extension, radial deviation, pronation and supination did not change significantly after surgery. Improved symptoms were reported by 41/43 (95.3%) patients and 40/43 (93%) patients would have had the same procedure again knowing the final outcome. Six of 43 patients (15%) had an ulnar plus variance. None of these needed ulnar shortening. CONCLUSIONS: Central traumatic TFCC lesions can safely be treated by arthroscopic debridement. We showed a sustained pain relief with significantly improved quality of life (DASH score) and wrist motion at follow-up. This resulted in a high patient satisfaction and acceptance of the procedure. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic, level IV.

[(Partial) fusion of the wrist : Indications and surgical procedures]. / (Teil­)Arthrodesen am Handgelenk : Indikationen und chirurgische Therapien.

Carpal bone fusions for secondary reconstruction are still indispensable despite state of the art diagnostic tools and modern treatment techniques for wrist lesions. The former fusions stabilize the wrist and enable sufficient residual carpal mobility. Pain can be reduced significantly by arthrodesis of destroyed joints and the progress of osteoarthritis may be stopped or delayed. This review presents commonly used fusions with their inherent indications, contraindications and complications.

[Primary intervention in Dupuytren's disease]. / Primäreingriff beim Morbus Dupuytren.

Partial aponeurectomy as the state-of-the-art treatment in Dupuytren's disease is indicated when minimally invasive forms of treatment, such as needle aponeurotomy or percutaneous collagenase injection, are not possible due to the advanced stage of the disease or the morphology of the contracture. Even in earlier stages of Dupuytren disease partial aponeurectomy has advantages in comparison to minimally invasive forms of treatment. These advantages are lower recurrence rates as well as less persistent residual contractures, especially in the proximal interphalangeal joint.

Frankfurt microsurgery course: the first 175 trainees.

INTRODUCTION: Microsurgery courses, taught external to surgical training programs, are essential for acquiring the high level of technical skill required for clinical proficiency. METHODS: The Frankfurt microsurgery course is a 5-day, intensive course that teaches arterial and venous anastomosis using end-to-end, end-to-side, one-way-up, continuous-suture, and vessel graft techniques. During the course, the instructor records the level of skill (in-course data) achieved by each trainee by assessing anastomosis completion and patency. Demographic information is also collected. Post-course trainees are invited to complete an online survey (post-course data) to get their opinions of the courses' effectiveness. RESULTS: The in-course "skill achievement" and post-course "course effectiveness" data are presented below. In-course data: 94.8 and 59.9% of participants completed patent end-to-end arterial and venous anastomoses, respectively, while 85.4% performed a patent end-to-side anastomosis. 96.1 and 57.1% of participants who attempted arterial and venous anastomoses using the one-way-up technique were successful, as were 90.9% of those attempting continuous-suture technique. Patent venous grafts were performed by 54.7% of participants. POST-COURSE DATA: All respondents indicated significant improvement of their microsurgical skills after taking the course. 66.7% of respondents considered the full-time presence of the instructor to be the most valuable aspect of the course. All respondents would highly recommend the course to colleagues. CONCLUSION: The microcourse significantly increased trainees' clinical microsurgery skills, confidence, and the number of clinical cases they perform. Of all the anastomosis techniques taught, venous anastomosis and grafting were the most difficult to learn. The presence of a full-time experienced instructor was most important.

[Fractures of the thumb ray]. / Frakturen des Daumenstrahls.

Fractures of the first thumb ray are common and need accurate differential treatment to restore gripping hand functions. Displaced fractures of the distal and proximal phalanx of the thumb are often treated with screws or Kirschner wires. Stable fractures can also be treated non-operatively. Fractures of the base of the first metacarpal should be differentiated into extra-articular Winterstein fractures and intra-articular Bennett or Rolando fractures. Traction forces by the abductor pollicis longus tendon regularly lead to displacement of the shaft of the first metacarpal; therefore, these fractures usually require reduction and fixation. Good functional results can be achieved by operative treatment. Fractures of the trapezium are rare. If they are displaced, operative treatment is recommended to prevent osteoarthritis of the first carpometacarpal joint.

Current concepts for the treatment of acute scaphoid fractures.

Fractures of the scaphoid are common injuries, accounting for approximately 80 % of carpal fractures. Differentiation between stable and unstable fractures (Herbert classification) cannot be made with conventional X-rays, so evaluation by computed tomography should additionally be performed. Under most circumstances, minimally invasive surgery with cannulated screws is the treatment of choice. A longer cast immobilization after minimal-invasive surgery is not necessary. Conservative treatment still has a place if the fracture is not dislocated nor unstable, but operative treatment can be offered to reduce the period of cast immobilization. Displaced fractures have a greater risk for nonunion and therefore should be treated operatively. Proximal pole fractures are definitely unstable, requiring treatment with screw fixation. The surgical approach depends on the location of the fracture and the preference of the surgeon.

[Bone Necrosis of the Hand]. / Knochennekrosen der Hand.

The bone necrosis of the hand is a common disease of the bone-cartilage complex. In principle, every bone of the hand can be affected. Compared to other osteonecroses of the hand the necrosis of the lunate occurs most frequently. Other diseases such as osteonecrosis of the Os scaphoideums (Morbus Preiser) are much rarer. Unfrequent diseases such as osteonecrosis of the metacarpal heads or all carpal bones are restricted to case descriptions. The lunate osteonecrosis leads to osteoarthritis of the wrist if untreated. A detailed clinical examination and adequate radiological diagnosis are essential. The lunate osteonecrosis is classified according to Lichtman and Ross based on radiographs. The treatment is being executed either conservatively or surgically, depending on the stage. In surgical treatment pressure relieving and revascularization procedures and rescue operations have been established. For all other osteonecroses of the hand no standardized therapy can be assigned because sufficient data are not available. Generally, the treatment for bone necroses of the hand should be found for each patient individually.

[Plastic surgical management in lower extremity sarcoma reconstruction]. / Plastisch-chirurgisches Management bei Weichgewebesarkomen an der unteren Extremität.

Tumors in the lower extremity with a critical size of over 5 cm diameter should principally be tested for being malignant soft-tissue sarcomas. If a soft-tissue sarcoma is present, radical oncological resection with sufficiently wide surgical margins is the most important cornerstone of curative therapy. No neoadjuvant or adjuvant treatment (radiotherapy or chemotherapy) can replace this treatment approach. Modern techniques of tumor resection as well as plastic-reconstructive surgery permit one to perform radical tumor excision in more than 95% of cases and to close large defects and to largely preserve function of the extremity by transplantation of muscles, tendons and bones as well as transplantations of nerves and blood vessels. The plastic reconstructions after radical tumor resection are often demanding and complex and require intensive interdisciplinary cooperation. This consists of the full spectrum of plastic surgical options, which should be performed in specialized centers and be specifically adapted to the patient and case profile. In this review different options for functional reconstruction after radical oncological removal of soft-tissue sarcomas are presented.

[Treatment of basal joint osteoarthritis by Swanson's trapezium implant arthroplasty]. / Behandlung der Rhizarthrose mittels Trapezium-Resektion und Swanson-Silikonprothese.

BACKGROUND: Goal of the present study was the evaluation of clinical and radiological results after treatment of the first carpometacarpal joint by trapezium resection and implantation of a Swanson silicone prosthesis by means of a retrospetive study. However, up to now, only a few long-term data for this surgical technique are available. METHODS AND PATIENTS: Retrospectively the results of 100 trapezium resections in 72 patients with subsequent joint replacement by a Swanson silicone prosthesis have been followed up over 8.6 years on average. Besides the range of motion, the strengh in grip, tip pinch and key pinch were measured. The quality of pain was determined using a visual analogus pain scale from 1-10. The postoperative subjective satisfaction of patients was recorded as well as the DASH, Mayo, modified Wrist and Krimmer scores. In follow-up X-ray controls, subluxations of the silicone implants as well as bony abnormalities were evaluated. RESULTS: The postoperative range of motion of the trapeziometacarpal joint in radial abduction was measured with 52° and at palmar abduction with 39°. The average grip strength amounted to 16.5 kg. This represented 80% of the value of the contralateral side. In tip pinch the force value was 3.3 kg, corresponding to 70% of that of the opposite side and in key pinch, it was 3.5 kg, corresponding to 71% of the healthy contralateral side. The DASH score was recorded with 22.5 points. Postoperative pain symptoms on the visual analogue pain scale were recorded at 2.4 points. The majority of the patients were satisfied or very satisfied after the surgical treatment. In X-ray controls, subluxations of the silicone implants could be detected in 54 cases (61.4%) as well as bony abnormalities in 41 cases (46.6%). However, there was no correlation between the radiological findings and patient satisfaction. CONCLUSION: Trapezium resection and joint replacement with a silicone prosthesis achieves good results. However, the high number of radiographic subluxations of the prothesis and bone abnormalities as a cause of foreign body reactions limits these results. Therefore, despite the good clinical findings, this method will not been conducted any more in our patient population.

[Biomechanical testing of a new total wrist arthrodesis plate]. / Biomechanische Testung einer neuen Handgelenkarthrodesenplatte.

PURPOSE: The aim of this study was to evaluate the biomechanical properties of the APTUS wrist fusion plate in comparison to those of the AO wrist fusion plate. MATERIAL AND METHOD: 6 APTUS wrist fusion plates (APTUS 2.5 TriLock Wrist Fusion Plate Long Bend) from Medartis (Basel, Switzerland) and 6 AO wrist fusion plates (= LCP Wrist Fusion Plate Standard Bend from Dupuy-Synthes, Bettlach, Switzerland) were installed according to the manufacturers' instructions on life-sized, fibre-glass reinforced polyamide models of a healthy human hand. Then fatigue testing with increasing loads on a monoaxial material testing machine was carried out and the force-movement measurements were recorded on a PC. For up to 50,000 cycles, loading was applied in a sinus-wave frequency of 4 Hz and a force ratio (FMin/FMax) of 0.1-70 N. After 50,000 cycles and then at every 10,000 cycles the load was increased by 15% until breakage or a deformation of over 15 mm at the point of force application of the implant occurred. In addition, the tear-out resistance of 5 screws of each type of plate was examined and the system tear-out resistance calculated. The mean values and standard deviations of fatigue strength, torsional moments and fatigue limits (load cycles) were checked for normal distribution and finally the results were compared by means of non-parametric and parametric statistical tests. RESULTS: Plate breakage occurred with the AO wrist fusion plate on average after 52,596 (SD±12,833) load cycles and with the APTUS wrist fusion plate after an average of 115,428 (SD±12,600) load cycles. For the AO wrist fusion plates, an average load of 6.3 (SD±0.8) Nm and for the APTUS plate one of 10 (SD±1.7) Nm led to failure. For the APTUS plate the screw tear-out resistance was calculated as 2,632 (SD±96) N while that for the AO plate was found to be 1,449 (SD±314) N. CONCLUSION: In comparison to the AO wrist fusion plate the APTUS wrist fusion plate has significantly higher fatigue resistance and tear-out strength. On the basis of 100,000 load cycles until bone healing in the case a wrist arthrodesis, use of the APTUS plate should enable bone healing to occur before the implant fails.

[Scaphoid fractures and pseudarthrosis of the scaphoid]. / Skaphoidfrakturen und Skaphoidpseudarthrosen.

Scaphoid fractures are by 80 % the most common fractures of the carpal bones. Detection and treatment can be delayed due to only slight clinical symptoms, which are often shown by acute injuries of the scaphoid. Pseudarthrosis of the scaphoid developing arthrosis of the wrist or even a carpal collapse can be the consequence. An in-depth clinical examination and adequate radiological diagnostics are essential for the detection and the treatment of scaphoid fractures. A primary examination by CT scan is obligatory. The classification of Krimmer/Herbert in the CT is used to subdivide the scaphoid fractures. Depending on the appearance of the fracture a conservative or surgical approach is indicated. All stable fractures of the scaphoid can be treated conservatively. In all forms of unstable scaphoid fractures surgery is recommended. Different ways of surgical approaches and osteosyntheses are described. Pseudarthrosis of the scaphoid should be surgically reconstructed with osteosynthesis in combination with bone graft to prevent a carpal collapse.