Radial-Ulna Synostosis

OBJECTIVE: To evaluate the effect of an induced synostosis with a screw on pronation and supination in cats. STUDY DESIGN: Ex vivo biomechanical study. SAMPLE POPULATION: A total of 58 feline forelimbs. METHODS: A total of 58 cadaveric feline thoracic limbs were mounted on a custom-built jig with the elbow and carpus flexed at a 90° angle. To exclude any orthopedic disease, radiographs of the forelimbs were performed prior to the mechanical tests...

OBJECTIVE: The deformity of congenital radioulnar synostosis is quite complicated and difficult. This study aims to find out the related factors of the "forearm rotation angle" (FR) which relate to the severity of congenital radioulnar synostosis (CRUS), and try to quantify the internal relations of each deformity and help to understand the reconstruction method in surgery treatment of this disease. METHODS: This study is case series research. We established 48 digital three-dimensional forearm bone models of 48 patients with congenital radioulnar synostosis classified as Cleary and Omer type 3...

The single-bone forearm is a salvage technique for massive loss of bone due to serious trauma, malignant tumors, infections or congenital deformity. It is also described to treat the sequelae of hereditary multiple exostoses disease that affects the distal end of the ulna. We present the case of a 29-year-old patient, operated for sequelae of hereditary multiple exostoses disease of the left forearm by a modified single-bone forearm technique. The patient, right-handed, operated on twice in childhood for a hereditary multiple exostoses disease of the left forearm: incomplete excision of the exostosis of the distal end of the ulna and lengthening of this last on external fixator, without improvement...

OBJECTIVE: To describe the modified mobilization surgery technique that uses a free vascularized fascia lata graft as the interposition graft, and to evaluate the outcome of this procedure in treating congenital radioulnar synostosis (CRUS). METHODS: Eleven patients (eight boys and three girls with an average age of 6.0 years) were treated using this procedure between 2012 and 2017 in our institution. Five bilateral cases (four left forearms and one right forearm were treated), and six unilateral cases (three left forearms and three right forearms) were included...

OBJECTIVES: To describe the results of orthogonal plating (OP) as a treatment for fractures of the radius and ulna in toy-breed dogs. MATERIALS AND METHODS: The medical records (June 2011 to April 2019) of toy-breeds in which the OP technique using non-locking cuttable plates was employed to treat radial and ulnar fractures were reviewed. The inclusion criteria included a bodyweight of 3.5 kg or less, fracture of the diaphysis of the radius and ulna of one or both forelimbs, and the availability of follow-up radiographs...

INTRODUCTION: Radioulnar synostosis is a bony connection between the radius and ulna, which causes restriction of the active and passive rotational movements of the forearm such as supination and pronation, which can lead to significant functional disability in the patients. CASE REPORT: A 35-year-old male carpenter presented with the complaint of right forearm supination and pronation restriction for the past 8 months with minimal pain at the elbow region with no previous history of trauma or surgery...

INTRODUCTION: Heterotopic ossification (HO) is a well-known sequela after an elbow injury and is widely studied given the associated morbidity. The anatomic location of HO development for specific elbow injuries has not been reported. The purpose of this study was to describe the precise, anatomic location of HO development after different peri-articular elbow injuries. METHODS: A retrospective chart review was performed for patients with peri-articular elbow fracture and/or dislocation who underwent an elbow contracture release...

OBJECTIVE: To investigate the effectiveness of local subcutaneous pedicled fat flap filling and separation of the synostosis area associated with radial shortening osteotomy and plate internal fixation for the treatment of congenital radioulnar synostosis. METHODS: Between February 2014 and June 2018, 36 patients (41 sides) with congenital radioulnar synostosis were analyzed retrospectively, including 21 males and 15 females, aged 2.5-4.5 years with an average of 3...

INTRODUCTION: Congenital proximal radioulnar synostosis (CPRUS) is a relatively rare forearm deformity that is characterized by a fixed pronated forearm of varying severity. The osseous synostosis between the proximal part of the ulna and the radius can be seen on the X-ray images in most cases. Many researchers have attempted to identify methods to measure the disease severity to guide in the treatment of CPRUS. However, to describe the overall deformity, the use of multiple indicators is essential, and some of these measurements require special software or need to be conducted on cadavers...

Ulnar hemimelia is a very rare skeletal abnormality characterized by the total or partial absence of the ulna. It is reported to occur in approximately 1 per 150,000 live births. Some shortening of the forearm, radial bowing, and tendency of the hand to drift to the ulnar side of the wrist usually accompany ulnar hemimelia. Other skeletal anomalies such as humeroradial synostosis, radial head dislocation, carpal or metacarpal coalition, and digital abnormalities may also be seen in cases of ulnar hemimelia...

Treatment of chronic Monteggia fracture-dislocations remains controversial in skeletally immature patients. The present study aimed to review the clinical outcomes of surgical treatment with an Ilizarov mini-fixator for chronic Monteggia fracture-dislocations in children. From April 2003 to March 2014, 5 pediatric patients (4 males, 1 female) with chronic Monteggia fracture-dislocation were treated with an Ilizarov mini-fixator at our institution. The median age at the time of surgery was 9 years (range 5-14 years), median duration from injury to surgery was 31 months (range 2-125 months), and median duration of follow-up was 12 months (range 11 months-10 years)...

PURPOSE OF THE STUDY The aim of our study was to determine the indications for radial head resection at the present day. MATERIAL AND METHODS The radial head resection was performed in the period from 2008 to 2015 in 63 patients divided into three groups. The first group marked "CR" consisted of 33 patients with the Mason type III fracture. The second group marked "CRLUX" included 20 patients with the Mason-Johnston type IV fracture, i.e. a fracture of the proximal end of the radius with a dislocation of the elbow joint...

We reconstructed three-dimensional images of radius and ulna in 38 forearms of 25 patients with congenital proximal radioulnar synostosis from their computed tomographic studies. We also analysed correlations between the deformities of radius and ulna and degrees of fixed pronation of these forearms. The average ulnar deviation, flexion and internal rotation deformities of the radius were 6°, 3° and 18°, respectively. The average radial deviation, extension and internal rotation deformities of the ulna were 3°, 4° and 30°, respectively...

OBJECTIVES: This study aims to evaluate the effects of radial bowing changes on fracture healing and functional results in adult forearm intramedullary nail applications and complications of forearm nails that have been discussed rarely in the literature. PATIENTS AND METHODS: Twenty-three patients -11 with isolated radius and 12 with both radius and ulna fractures- (17 males, 6 females; mean age 38.6 years; range 18 to 69 years) who were operated between September 2009 and August 2014 were included in the study...

Objectives The objective was to describe the complications and long-term outcome associated with Kirschner (K)-wire fixation of combined distal radial and ulnar physeal fractures in six cats. Methods Medical records (2002-2014) of six referral institutions were searched for cats with combined distal radial and ulnar physeal fractures. Cases with complete clinical files, radiographs and surgical records were retrospectively reviewed. Long-term outcome was assessed via telephone interviews using an owner questionnaire...

Primary bone tumors around the elbow represent <1% of all the skeletal tumors. Surgery with or without adjuvant therapy (radiotherapy, chemotherapy) is the treatment of choice for malignant tumors. Reconstruction of the elbow and forearm in malignant tumors is challenging as it involves a complex interplay between multiple joints which need to be stabilized for the optimal functional outcome. We describe a new technique for the reconstruction of the elbow after resection of a proximal ulna tumor with articular radio-ulnar synostosis with the creation of a single bone forearm...

OBJECTIVE: To investigate the imaging features of humerus, radius and ulna rare malformation. METHODS: A retrospective analysis of the clinical data and image of 40 cases of humerus and the radius and ulna rare developmental deformity andadmitted to hospital affiliated to 1958 - 2014 years in The Affiliated Hospital of Hangzhou Normal University and the Third Hospital of Hebei Medical University. Take the Swanson classification as the basis, the image changes of different types of malformations are classified and summarized...

BACKGROUND: Congenital radioulnar synostosis (CRUS) refers to an abnormal connection between the radius and ulna due to embryological failure of separation. Derotational osteotomy has been advocated for children with functional limitations, although historically this procedure has been associated with a 36% complication rate including compartment syndrome and loss of correction. METHODS: A retrospective evaluation of consecutive patients who underwent derotational osteotomy for CRUS at a single institution was performed...

Congenital radial head sub-luxation was diagnosed in a 7-month-old, neutered male shih tzu that presented with a limb deformity and severe lameness of the right fore limb. Radiography revealed a craniolateral sub-luxation of the right radial head, which was treated by radial head ostectomy, fixation of the radius to the ulna with a screw and joint stabilisation with suture-anchors and cerclage wire. Surgical treatment followed by physiotherapy resulted in a fully functional, well-aligned and non-painful elbow...

We describe a 0.73 Mb duplication of chromosome 22q11.21 between LCR-B and LCR-D and a missense mutation in a conserved C2H2 zinc finger domain of SALL4 in a cognitively normal patient with multiple skeletal anomalies including radioulnar synostosis, thumb aplasia, butterfly vertebrae, rib abnormalities, and hypoplasia of the humeral and femoral epiphyses. 22q11.21 is a common site for microdeletions and their reciprocal microduplications as a result of non-allelic homologous recombination between its multiple low copy repeat regions (LCR)...