Bado Type Research Articles

Bado type III Monteggia fractures have a high injury- and treatment-related complication rate: a single center study of 73 fractures.

Monteggia fractures can be problematic injuries. The aim of this population-based study is to evaluate the risk of complications according to the Bado types, clinical outcome, and incidence. 72 children (median age 6, range 2-11 years) with 73 Monteggia fractures treated during 2014-2022 were identified from the institutional fracture register. Timing of diagnosis, complications, and method of treatment were registered. Outcomes were assessed at mean 4 years (1-9) follow-up in 68 (94%) children. The census population (< 16 years old) in Helsinki metropolitan area during the study period was assessed. Bado types I (n = 43) and III (n = 27) comprised all but 3 of the fractures. Diagnosis was made on admission in 57, and with a 1-8-day delay in 16 children. 8 children had sustained an associated nerve injury. 35 children were treated operatively, 7 after failed closed treatment. 4 reoperations were performed, including 3 ulnar osteotomies. The risk of complications (odds ratio [OR] 4.9, 95% confidence interval [CI] 1.7-14) and closed treatment failures (OR 12.3, CI 1.3-118) was higher in Bado type III than in type I injuries. 60 children attended for clinical follow-up, all had congruent radio-humeral joints and full range of elbow and forearm motion. Mean PedsQL was 94 (72-100) and QuickDash 3 (0-13). 8 additional children reported normal elbow functions by phone. The calculated mean annual incidence of Monteggia injuries was 2.9/100,000 children. Monteggia fractures are rare (2.9/100,000 yearly). Bado type III injuries are associated with a high risk of complications.

Management of Compartment Syndrome in Monteggia Fracture Bado Type III: A Case Report

Management of Compartment Syndrome in Monteggia Fracture Bado Type III: A Case Report

Radiological and Functional Outcome of Internal Fixation of Monteggia Fracture Dislocation by DCP in Adult Patients

Background: Surgical reduction and internal fixation are the mainstays for the treatment of the Monteggia fracture-dislocation in adult and there are various surgical modalities for internal fixation. Various types of implants used in fixation of Monteggia fracture dislocation in adult and the outcome also differ. Small DCP is one of the important implants. The fracture of the proximal third of the ulna with dislocation of the head of the radius was commonly known as Monteggia fracture dislocation. Objective: To assess the radiological and functional outcome of internal fixation of monteggia fracture dislocation by (DCP) in adult patients. Methods: This prospective observational study had been conducted in Monno Medical College and Hospital, Manikganj, to evaluate the results of open reduction and internal fixation of the ulna with small DCP and anatomical reduction of radial head in early cases of Monteggia fracture dislocation in adult from January 2022 to December 2022. Total 40 patients with radiologically proven closed Monteggia fracture-dislocation that were enrolled in this study by purposive sampling method. Radiological and functional outcome were assessed and followed up for 24 weeks. Results: Results were evaluated by Quick DASH score, VAS scale, ROM of flexion-extension and supination-pronation. Final functional outcome was done with Anderson criteria. Results: Total 40 patients were included. Among 15 (37.5%) patients were from 20-29 years age group, 8 (20.0%) were from 30-39 years age group, 11 (27.5%) were from 40-49 years age group and 6 (15.0%) were from 50-55 years age group. The mean age of the patients was 35.96±11.48 years where minimum age was 20 years and maximum age was 55 years. 32 (80.0%) patients were male and 8 (20.0%) patients were female. Out of the 40 patients, 35 (87.5%) presented with Bado type I fracture and 5 (12.5%) presented with Bado type II fracture. The mean time interval between injury and surgery was 10.13±3.86 days. Post-operative complications (tourniquet palsy and wound infection) developed in 5 (12.5%) patients. According to Anderson criteria nine (22.5%) patients had excellent, 25 (62.5%) patients had good, 3 (7.5%) had fair and 7 (7.5%) patients had poor outcome. Final outcome was satisfactory (excellent and good) in 35 (87.5%) patients and unsatisfactory (fair and poor) in 5 (12.5%) patients. Patients who had Bado type II fracture had less satisfactory outcome (p=0.004). Again, patients who had more time interval between injury and surgery also had less satisfactory outcome (p=0.012). Conclusion: Monteggia fractures are uncommon injuries. The commonest type of monteggia fracture dislocation in adults according to Bado’s classification is type-1. Operative treatment of Monteggia fracture-dislocation by the selected implant, leads to excellent to good radiological and functional result with uncomplicated recovery in majority of the cases.

Comparison of the midterm result between locking plate and elastic intramedullary nail treating oblique ulnar fracture Bado type I acute monteggia fracture in pediatric patients

BackgroundAcute Monteggia fracture (AMF) is defined as a fracture of the proximal ulna combined with a dislocation of the radial head, with less than 1 percent prevalence in pediatric patients with an elbow injury. This retrospective study aimed to compare the efficacy of two treatment methods for oblique ulnar fracture AMF Bado type I in children.MethodsIn this retrospective study, 28 children with oblique ulnar fracture acute Monteggia injury Bado I were included. Patients was divided into two groups: In the EIN group 16 patients were fixed with elastic intramedullary nail after reduction, and in the LCP group 12 patients were fixed with locking compression plate after reduction. Operation time and blood loss were recorded and the patients were assessed clinically by the Mayo Elbow Performance Score (MEPS), range of movement(ROM) and range of rotation(ROR).ResultsTwenty-eight patients were accessible for durable follow-up, with a mean age of 7.7 ± 1.3 years, follow up by 33.7 ± 5.1 months. The average operation time was 48.1 ± 9.2 min for the EIN group and 67.1 ± 7.2 min for the LCP group. The average blood loss was 8.2 ± 2.3 ml for the EIN group and 18.8 ± 3.8 ml for the LCP group. The average operation time and average blood loss in the EIN group are significant less than the LCP group. Mean MEPS, ROM, ROR in both group improved significantly before sugery to three months after surgery, and maintained very good results at last follow up. There is no significant difference between the EIN group and the LCP group in MEPS, ROM and ROR.ConclusionsOblique ulnar fracture Bado type I acute monteggia fracture in pediatric patients fixed by EIN and LCP can both get good mid-term results measured by MEPS, ROM and ROR, Fixed by EIN have shorter operation time and less blood loss than fixed by LCP.

Outcomes and experience after open reduction for chronic Monteggia fracture in children.

BackgroundThe treatment of chronic Monteggia fracture-dislocation (CMF) remains controversial and challenging for surgeons. We describe our initial experience with ulnar osteotomy and angulation on correction with modified open surgery and evaluate outcomes from clinical and radiographic findings.MethodsWe retrospectively reviewed 18 children with a mean age of 6.78±2.67 years old who underwent surgical treatment because of CMF. Electronic medical records of Bado type, complaints, Kim scores, and complications were recorded. Radiographic parameters of maximum interosseous distance (MID), proportional ulnar length (PUL), lengthening, and bending angle of the ulna were summarized. The final reduction statuses of the radial head were reviewed. Parameters were compared at the time of pre-operation and the last follow-up. The relationship between the lengthening and angulation of ulna and the interval was calculated.ResultsThe mean interval was 11.1 [1–48] months and the follow-up time was 46.6 [24–96] months. A good reduction was observed in 15 (83.33%) patients, while 3 (16.67%) patients were fair. Postoperatively, the Kim scores were improved, from 59.17±18.17 to 90±6.64 (P=0.000). The mean posterior bending angle was 12.88° (range, 3 to 25°), and the mean amount of elongation of the ulna was 8.78 mm (range, 3.61 to 17.52 mm). The lengthening of the ulna was proportional to the magnitude of angulation of the ulna (r=0.648, P=0.004), and a positive correlation was also seen between the lengthening and the interval (r=0.632, P=0.005) and the angulation and the interval (r=0.502, P=0.034). The PUL and MID were significantly increased from 1.06±0.03 and 1.11±0.26 to 1.13±0.11 (P=0.047) and 1.28±0.27 (P=0.021), separately.ConclusionsWe highlight ulnar osteotomy as the essential procedure during reconstruction surgeries. Stabilization of the radial head with adequate elongation and balanced angulation of the osteotomy through direct observation is the main way to ensure and maintain satisfactory outcomes. With the extension of the interval, it is more necessary to increase the lengthening and angulation in positive proportion. PUL is a useful parameter in evaluating the mismatch between ulna and radius in CMF.

Influence of ulnar bow sign on surgical treatment of missed Bado type I Monteggia fracture in children

The present study aimed to explore the influence of ulnar bow on the surgical treatment of Bado type I missed Monteggia fracture in children. A retrospective review of 28 patients was conducted between November 2010 and June 2020. All patients were treated with open reduction of the radial head and ulnar opening wedge osteotomy without annular ligament reconstruction. Four months (range 1–12 months) was the mean interval between injury onset and surgery. The average age of patients at the time of surgery was 6.1 years old (range 2–10 years old). The maximum ulnar bow (MUB) and MUB position (P-MUB) via radiography were evaluated. The patients were divided into two groups according to P-MUB, as follows: middle group (A) included 17 cases, and the MUB was located at 40–60% of the distal ulna; and distal group (B) included 11 cases, and the MUB was located at 20–40% from the distal end of the ulna. The mean follow-up period was 33 months (range 6–102 months). At the last follow-up, all the children showed stable reduction of the radial head, and the flexion function of elbow joint improved after the operation (P < 0.05). Group A presented a larger ratio of maximum ulnar bow (R-MUB) and angle of ulnar osteotomy (OA) than group B (P < 0.05). The osteotomy angle was positively correlated with the R-MUB (R2 = 0.394, P = 0.038). The osteotomy angle was positively correlated with the P-MUB (R2 = 0.683, P = 0.000). The R-MUB was proportional to the P-MUB (R2 = 0.459, P < 0.0001). The regression equation of P-MUB and osteotomy angle was as follows: OA = 32.64* P-MUB + 7.206. If the ulnar bow was positioned at the middle ulna, then a stable reduction of radial head needed to be achieved through a large angle in the ulnar osteotomy. If the position of maximum ulnar bow (P-MUB) was closer to the middle of the ulna, or the ratio of maximum ulnar bow (R-MUB) was larger, then the osteotomy angle was larger.

Functional Outcome of Pediatric Monteggia Fracture Dislocation Treated Surgically in a Tertiary Care Centre of Nepal

Background Monteggia fracture dislocation may need operative management. The fracture of ulna is reduced by closed or open reduction followed by stabilization of ulna with Rush pin, K-wires or Dynamic compression plate.&#x0D; Objective To evaluate the Mayo Elbow Performance Score of patients with Monteggia fracture dislocation treated operatively.&#x0D; Method It is a retrospective study conducted at Dhulikhel Hospital, Kathmandu University Hospital. All the pediatric patients with Monteggia fracture dislocation managed operatively from January 2011- December 2019 were included in the study. The functional outcome scoring of the effected elbow using Mayo Elbow Performance Score was done in the last follow up.&#x0D; Result Forty eight surgically managed Monteggia patients had a mean age of 7.23 ± 2.9 years with male predominance. Left side was the dominant side of involvement with 29 patients. Bado type 1 was the most common type (81.3%). Most of the patient underwent closed reduction and fixation with Rush pin (n=40). All of the patient has excellent (89.6%) to good (10.4%) functional outcome.&#x0D; Conclusion Operative management of Monteggia fracture dislocation with complete ulna fracture has excellent to good outcome.

Operative Versus Nonoperative Management of Acute Pediatric Monteggia Injuries With Complete Ulna Fractures.

The treatment of acute pediatric Monteggia injuries involving a complete fracture of the ulna remains controversial. The purpose of this study is to compare the outcomes of immediate operative fixation to a trial of closed reduction and casting of acute pediatric Monteggia fractures involving complete ulna fractures. We performed a retrospective analysis of 73 patients with Monteggia injuries with complete ulna fractures presenting to 2 pediatric trauma centers from 2008 to 2018. Patients were divided in 2 groups based on the treatment received: patients in group 1 (n=37, 51%) received surgical treatment; patients in group 2 (n=36, 49%) received a trial of closed reduction and casting. The mean follow-up of 15.2 weeks (range, 4.1 to 159 wk). The incidence of radiocapitellar joint redislocation, need for further intervention, complications, and recovery of range of motion was compared between the groups. There were no significant differences between groups 1 and 2 with regards to age (6 vs. 5.8 y, P=0.69), sex (54% vs. 47% female, P=0.64), or the mean maximal ulnar angulation (23 vs. 19 degrees, P=0.94). There was a higher proportion of proximal ulna fractures in group 1 versus 2 (62% vs. 33%, respectively, P=0.02). Bado type III and IV fractures were associated with operative management [odds ratio=22 (95% confidence interval: 1.68-288.7) and 14.9 (95% confidence interval: 2.09-106), respectively]. In group 2, 5 patients (13.9%) sustained a loss of radiocapitellar joint reduction following closed reduction and casting and ultimately received operative treatment. At final follow-up, there were no cases of recurrent radiocapitellar dislocation in either group, all patients achieved fracture union and regained full elbow range of motion. Even in the presence of a complete ulna fracture, a trial of nonoperative management of acute pediatric Monteggia fractures with closed reduction and casting can result in comparable outcomes to those obtained with immediate surgical management. The nonoperative management of Monteggia fractures requires close clinical follow-up to ensure no loss of reduction. Level IV-therapeutic studies, case series.

Application of annular ligament reposition and repair via Henry's approach for Monteggia fracture in children

To explore the effectiveness of annular ligament reposition and repair via Henry's approach for Monteggia fracture in children. A clinical data of 21 children with Monteggia fractures was retrospectively analysed, who underwent open reduction of the radial head and annular ligament reposition and repair via Henry's approach between May 2015 and July 2019. There were 11 boys and 10 girls with an average age of 8 years and 1 month (range, 4 years and 5 months to 14 years and 4 months). The fracture was caused by falling in 17 cases and by falling from height in 4 cases. There were 16 fresh fractures and 5 old fractures. The Monteggia fractures were rated as Bado typeⅠin 14 cases and Bado type Ⅲ in 7 cases. Preoperative MRI examination and intraoperative observation confirmed that the annular ligament was intact. After operation, the fracture healing, elbow range of motion (ROM), and complications were recorded, and the effectiveness was evaluated according to the Mackay's function scoring system. The incisions healed by first intention after operation, and there was no complication such as radial nerve injury. All children were followed up 12-25 months, with an average of 15 months. No dislocation or subluxation of the radial head occurred after operation. At last follow-up, the ROM of elbow flexion and extension of the children with old fractures increased from (92.6±11.2)° before operation to (123.6±11.6)°, and the ROM of forearm rotation from (96.8±11.8)° to (129.8±5.9)°; the differences between pre- and post-operation were significant ( t=7.672, P=0.002; t=9.487, P=0.001); the ROM of elbow flexion and extension of the children with fresh fractures was 139°-156° (mean, 145°); the ROM of forearm rotation was 158°-168° (mean, 162°). According to Mackay's criteria, 17 cases were excellent and 4 cases were good, with an excellent and good rate of 100%. X-ray film examination showed no nonunion, heterotopic ossification, or loosening of internal fixation after operation. The ulnar fracture and the ulnar osteotomy healed in all cases. The annular ligament in Monteggia fractures in children is intact. Compared with the reconstruction of the annular ligament, the reposition and repair of the annular ligament via Henry's approach is closer to the original anatomical state of the annular ligament and has the advantages of less trauma and fewer complications.

Quantitative Analysis for the Change in Lengths of the Radius and Ulna in Missed Bado Type I Monteggia Fracture.

In missed Monteggia fracture (MMF) cases, ulnar angulation and lengthening by osteotomy are required to reduce the dislocated radial head. This study aimed to clarify the abnormal discrepancy in length between the radius and ulna in MMF. We tested the hypothesis that the increase in the abnormal discrepancy in length between the radius and ulna relates with the duration of radial head dislocation. In total, 24 patients with MMF were studied and classified into 2 groups, according to the duration of radial head dislocation, including the early group (n=9, within 3 y) and the long-standing group (n=15, older than 3 y). The lengths of the radius (Lr) and ulna (Lu) were measured. The difference in length between the ulna and radius (DL=Lu-Lr) was calculated on both the affected (DLaff) and normal (DLnor) sides. DLnor-DLaff, which represented an abnormal discrepancy in both bones, was analyzed for correlation with the duration of radial head dislocation and the age at initial injury. The affected and normal sides had no differences in the Lr of both the groups and in the Lu of the early group. However, in the long-standing group, Lu was significantly smaller in the affected side than in the normal side (P=0.001). In the long-standing group, DLaff was significantly smaller, owing to decreased length of the ulna, than DLnor (P=0.003). The DLnor-DLaff was positively correlated with the duration of radial head dislocation and was negatively correlated with the age at injury. In chronic MMF cases, the length of the ulna was shorter in the affected side than in the normal side. Therefore, ulnar lengthening is necessary to resolve this abnormal discrepancy and reduce the radial head. Because excessive ulnar lengthening has risks of postoperative complications, one of the surgical options is gradual ulnar lengthening or shortening osteotomy of the radius. Level III-Prognosis study.

Compartment Syndrome in Operatively Managed Pediatric Monteggia Fractures and Equivalents.

Acute compartment syndrome (ACS) is not commonly associated with pediatric Monteggia fractures or Monteggia equivalents (MF/ME). The aims of this study were: (1) To document a rate of ACS among children with operatively managed MF/ME, comparing this to the rate of ACS in classically associated Type 3 supracondylar humerus (T3-SCH) fractures at the same institution; (2) To determine which patients with MF/ME are at highest risk for ACS. Children ages 2 to 12 with MF/ME requiring operative management at an academic institution over a 14-year period were identified. The Monteggia fractures were characterized using the Bado classification; equivalent injuries were identified according to established criteria. Similarly, all patients with T3-SCH fractures managed over the same period were identified. Record review included demographic, procedural, and radiographic variables. Statistical analysis compared the rates of ACS in both groups and determined risk factors associated with developing ACS in patients with MF/ME. The rate of ACS in MF/ME was 9 of the 59 (15.3%), which was significantly higher than the rate of ACS in T3-SCH fractures 2 of the 230 (0.9%) (P=0.001). Comparing MF/ME with ACS to those without; there was no difference in sex (P=1.00), Bado Type (P=0.683), or Monteggia fracture versus equivalent (P=0.704). MF/ME with preoperative vascular deficits (22.2%) and those undergoing intramedullary fixation of the radius were more likely to develop ACS (P=0.021 and 0.015, respectively), and there was a trend toward higher rates of ACS among MF/ME with preoperative neurological deficits (P=0.064). Patients with operatively managed MF/ME had a significantly higher rate of ACS compared with patients with T3-SCH fractures. With no predisposition based on Bado classification or Monteggia fracture versus equivalent, all operatively managed MF/ME appear to be at risk for ACS. Patients with preoperative neurovascular deficits and those undergoing intramedullary radial fixation develop ACS at higher rates. Careful assessment of the forearm for signs and symptoms of ACS both before and after fixation is critical. Level III-retrospective case control.

Clinical effect of manual reduction of humeroradial joint in the treatment of type Ⅰ–Ⅲ fresh Monteggia fracture in children

PurposeTo evaluate the efficacy of closed reduction on the humeroradial joint in the treatment of Bado type Ⅰ, Ⅱ and Ⅲ fresh Monteggia fractures in children and investigate the effect of clinical factors, including Bado classification, age and time of treatment on the success rate of closed reduction. MethodsWe retrospectively studied the data of children ≤10 years old with fresh Monteggia fractures (injury within two weeks) treated by manual reduction with plaster immobilization from January 2014 to April 2019. All patients were followed up in the outpatient department every two weeks for 4–6 weeks until plaster removal and then 3, 6 and 12 months. Online or telephone interview was provided for some inconvenient patients after 6 months. Mackay criteria were used to evaluate the clinical effect. Radiographic data were collected and reviewed to assess the reduction of the humeroradial joint. Function of the elbow joint and forearm was evaluated and risk factors related to the failure of reduction were assessed. The successful manual reduction was analyzed from three aspects, respectively Bado fracture type (Ⅰ, Ⅱ, Ⅲ), patient age (<3 year, 3–6 years, >6 years) and time interval from injury to treatment (group A, <1 day; group B, 1–3 days; group C, >3 days). ResultsAltogether 88 patients were employed in this study, including 58 males (65.9%) and 30 females (34.1%) aged from 1 to 10 years. There were 29 cases (33.0%) of Bado type Ⅰ Monteggia fractures, 16 (18.2%) type Ⅱ and 43 (48.7%) type Ⅲ. Successful manual reduction was achieved in 79 children (89.8%) at the last follow-up. The failed 9 patients received open surgery. Mackay criteria showed 100% good-excellent rate for all the patients. The success rate of manual reduction was 89.7%, 87.5% and 90.7% in Bado type Ⅰ, Ⅱ and Ⅲ cases, respectively, revealing no significant differences among different Bado types (χ2 = 0.131, p = 0.937). Successful closed reduction was achieved in 13 toddlers (13/13, 100%), 38 preschool children (28/42, 90.5%) and 28 school-age children (28/33, 84.8%), suggesting no significant difference either (χ2 = 2.375, p = 0.305). However time interval from injury to treatment showed that patients treated within 3 days had a much higher rate of successful manual reduction: 67 cases (67/71, 94.4%) in group A, 10 cases (10/11, 90.9%) in group B, and 2 cases (2/6, 33.3%) in group C (χ2 = 22.464, p < 0.001). Fisher's test further showed significant differences between groups A and C (p = 0.001) and groups B and C (p = 0.028). ConclusionClosed reduction is a safe and effective method for treating fresh Monteggia fractures in children. The reduction should be conducted as soon as possible once the diagnosis has been made.

Anatomically shaped locking plates for radial head and olecranon fracture fixation in Monteggia-like lesions.

Monteggia-like lesions are rare injuries. We retrospectively reviewed 40 consecutive patients with Monteggia-like lesions treated at a level I trauma center from 2009 to 2016. Clinical results were evaluated with a focus on the use of modern locking plates. Twenty-eight patients had Bado type II fractures, 11 had Bado type I, and 1 had Bado type III. All patients were treated by plate fixation of the ulna with a locking compression plate or double mini-plates. Fixation or replacement was performed for radial head fractures. We characterized all fractures and recorded the range of motion (ROM); 100-point visual analog scale (VAS) scores for pain and function; Disabilities of the Arm, Shoulder and Hand (DASH) score; and Mayo Elbow Performance Score (MEPS). A follow-up rate of 78% was reached at an average of 36 months (range, 12-95 months). Stable fixation without recurrent instability was accomplished. The average ROM for flexion reached 130∘ with an extension deficit of 13∘. The sum of supination and pronation was 136∘. The VAS scores for pain and function were 20 and 75, respectively. The average MEPS and DASH scores were 84 and 28, respectively. Bado type I fractures had better outcomes for all variables, especially forearm rotation (p< 0.05). The complication rate was 22.5% and revision rate was 17.5%. This fracture repair technique can safely achieve good and excellent outcomes in most cases and is partly superior to previously published techniques. However, Bado type II fractures still have a risk of poor results.

Acute ulnar osteotomy versus gradual distraction by external fixator to correct missed monteggia type 1 fracture-dislocation; A comparative study

Background: Monteggia fracture-dislocations are complex injuries. These injuries, especially neglected ones, remain a challenge for orthopedic surgeons. The aim of this study is to compare the results of acute and gradual ulnar lengthening osteotomies in treating chronic Monteggia fractures in children. Patients and Methods: The study includes two groups of patients, treated at our institution in the period from April 2014 to September 2018. The first group (Group A) included nine patients who were treated by an overcorrective ulnar osteotomy with acute lengthening with bone grafting. The second group (B) includes 11 children who were treated by Ilizarov distraction osteogenesis for differential lengthening of forearm bones. There were 14 boys and 6 girls. The left elbow was involved in five patients and the right elbow 15 patients. All fractures were classified as Bado type I with anterior radial head dislocation. The average age at the time of surgery was 7 years and 4 months. Results: The mean interval from the injury to surgical interference was 8.6 months. There was a significant improvement of the elbow range of motion and Mayo elbow performance score. In group B, the mean external fixation time was 9.7 weeks (range from 9 to 15 weeks). The mean total treatment time was 12.3 weeks (ranged from 12 to 16 weeks). Superficial pin-tract infection occurred in all cases and was managed without further sequelae. Conclusions: Both approaches yielded equally good results. The open surgery approach entails a more invasive procedure, but more convenient to the patient and no arduous postoperative follow-up is needed. On the contrary, differential lengthening of forearm bones is a percutaneous procedure with the application of Ilizarov principles in a controlled biological manner; with no graft materials needed. Both techniques effectively reduced the radial head.

Effect of soft tissue injury and ulnar angulation on radial head instability in a Bado type I Monteggia fracture model.

The effects of soft tissue damage and ulnar angulation deformity on radial head instability in Monteggia fractures are unclear. We tested the hypothesis that radial head instability correlates with the magnitude of ulnar angular deformity and the degree of proximal forearm soft tissue injury in Bado type I Monteggia fractures.We performed a biomechanical study in 6 fresh-frozen cadaveric upper extremities. Monteggia fractures were simulated by anterior ulnar angulation osteotomy and sequential sectioning of ligamentous structures. We measured radial head displacement during passive mobility testing in pronation, supination, and neutral rotation using an electromagnetic tracking device. Measurements at various ligament sectioning stages and ulnar angulation substages were statistically compared with those in the intact elbow.Radial head displacement increased with sequential ligament sectioning and increased proportionally with the degree of anterior ulnar angulation. Annular ligament sectioning resulted in a significant increase in displacement only in pronation (P < .05). When the anterior ulnar deformity was reproduced, the radial head displaced least in supination. The addition of proximal interosseous membrane sectioning significantly increased the radial head displacement in supination (P < .05), regardless of the degree of anterior ulnar angulation.Our Monteggia fracture model showed that radial head instability is influenced by the degree of soft tissue damage and ulnar angulation. Annular ligament injury combined with a minimal (5°) ulnar deformity may cause elbow instability, especially in pronation. The proximal interosseous membrane contributes to radial head stability in supination, regardless of ulnar angulation, and proximal interosseous membrane injury led to significant radial head instability in supination.

The mechanism of injury of a hybrid Bado type I/III Monteggia lesion: Analysis of a live recording from a gymnastics injury

The injury mechanism of a case of hybrid Bado type I/III Monteggia fracture had been recorded live by the parent of a gymnast in a competition. This live recording was generously offered by the parent to the treating surgeon to study the injury mechanism. The video captured was segmented by slow motion frames to study the whole process of the injury mechanism. The injury mechanism was analyzed by the authors jointly to verify the interpretation of the loading mechanism and the resultant injury. The patient had been treated with conventional method with satisfactory result.

A prospective study on surgical management of neglected Montaggia fracture in children without annular ligament repair

&lt;p class="abstract"&gt;&lt;strong&gt;Background:&lt;/strong&gt; Monteggia fracture presenting after 4 weeks of injury termed as neglected monteggia fracture.There are many options for management of this fracture. The present study was planned with objective to assess clinical outcome of patients who were treated with a specific technique of ulnar osteotomy without annular ligament repair.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Methods:&lt;/strong&gt; This prospective study was conducted in Department of Orthopaedics MKCG Medical College and Hospital, Berhampur from July 2015 to April 2018 where 15 patients of neglected monteggia fracture were operated with specific technique of ulnar osteotomy without annular ligament repair. Participants were followed up and at end point they were evaluated for pain, stability, and disturbance of daily and sporting activities. Function was assessed using elbow performance score. Data collected were analyzed in SPSS (version 16.0).&lt;strong&gt;&lt;/strong&gt;&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Results:&lt;/strong&gt; Mean age of study participants was 7.3 year and male constituted majority (60%). There were 11 children with Bado type I, 3 with type II and one with type III injury. The mean time from initial injury was 8.8 months. All had limited range of movements of forearm and elbow. All patients had regular follow up for 9 months to 24. In 53.3% flexion arc was improved. The mean flexion arc was increased by 20 degree and pronation-supination arc was reduced by 20 degree.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions:&lt;/strong&gt; The present study revealed that osteotomy in neglected monteggia fracture brings stability of elbow joint and this surgical management of neglected monteggia fracture without annular ligament reconstruction had good outcome. Annular ligament reconstruction is not always necessary.&lt;/p&gt;

Open reduction combined with CORA-based osteotomy of the ulna in the treatment of missed Bado type I Monteggia injury: A retrospective study of 5 cases.

Open reduction combined with ulnar osteotomy is the most common approach to treating missed Monteggia injuries. The osteotomy is usually performed at the proximal ulna to ensure better healing and fewer complications. The purpose of this study is to present a center of rotation angulation (CORA)-based osteotomy of the ulna for treating Bado type I Monteggia injuries.We retrospectively reviewed the cases of patients who were treated with open reduction combined with a CORA-based ulnar osteotomy between February 2014 and December 2016. Each patient provided his or her internal control, and paired data of the involved and uninvolved sides were analyzed to evaluate forearm rotation function.Five patients (3 male, 2 female) with median age 5.7 years (range, 3.4–6.8 years) were operated on by the senior author in our hospital. The median interval between the original injury and the corrective surgery was 3 months (range, 1–4 months). In a median follow-up of 10 months (range, 6–17 months), all patients obtained stable reduction of the radial head and uneventful healing of the ulnar osteotomy. All patients had pain-free elbows with no neurological or vascular complications and no implant breakage. Patients showed excellent outcomes evaluated using the Broberg and Morrey index.Open reduction with a CORA-based osteotomy of the ulna for the treatment of missed Bado type I Monteggia injury with an obvious ulnar bowing deformity resulted in stable reduction of the radial head and excellent forearm function.

The Adult Monteggia Fracture: Patterns and Incidence of Annular Ligament Incarceration Among 121 Cases at a Single Institution Over 19 Years.

The purposes of this study were to identify the relative frequency of Monteggia fracture patterns and to investigate the required frequency of open reduction of the proximal radiocapitellar joint. We identified 121 Monteggia fractures at a Level I trauma center from 1996 to 2015 and included 119 in this study. These fractures were identified using a database search for the appropriate International Classification of Diseases, Ninth Revision and Current Procedural Terminology codes as well as individual surgeons' logs. Two fellowship-trained hand surgeons reviewed the identified patients' x-rays and operative notes. Each fracture was classified using Bado's original description, excluding transolecranon and Monteggia variants. Bado I lesion represented 68% (81 of 119) of Monteggia fractures. Annular ligament incarceration preventing radial head reduction occurred in approximately 17% (14 of 81) of this Bado type. Revision fixation of the ulna was not necessary (none of 119 cases) and functional range of motion (average arc, 117°) was recovered in most patients. The reoperation rate of 20%(23 of 119) was related to the severity of the presenting injury and hardware prominence. Most radial head dislocations associated with Monteggia fractures occur anteriorly and will reduce with anatomic plating of the ulna. In cases where the radial head fails to reduce, entrapment of the annular ligament can be expected and open reduction is required. Revision fixation of the ulna to achieve reduction of the radial head is uncommon in ourexperience. Prognostic IV.

Acute Pediatric Monteggia Fractures: A Conservative Approach to Stabilization.

In 2015, a multicenter study group proposed a treatment algorithm for pediatric Monteggia fractures based upon the ulnar fracture pattern. This strategy recommends surgical stabilization for all complete ulna fractures. The purpose of this study was to evaluate whether an initial nonoperative approach to pediatric Monteggia fractures resulted in poorer outcomes and a higher rate of complications. This institutional review board approved retrospective study evaluated all Monteggia fractures presenting to a level 1 pediatric trauma center between 2008 and 2014. Chart and radiographic reviews were performed on 94 patients who met inclusion criteria. The mean age was 5.5 years (range, 1 to 13 y). The mean clinical follow-up was 18 weeks. Major complications were defined as those requiring an unplanned second procedure (other than implant removal) or that may result in long-term disability (residual radial head subluxation/dislocation). Univariate (P<0.05) and Multivariate Classification and Regression Tree (CART) (P<0.05) analyses were used to identify variables associated with the need for surgical stabilization. At final follow-up, there were no cases of residual radiocapitellar joint subluxation or dislocation and all fractures had healed. The majority (83%) of patients were successfully managed with a cast. Univariate analysis found Bado type and maximum ulna angulation as significant predictors (P<0.05), whereas the CART analysis found ulna angulation >36.5 degrees as the only primary predictor of requiring surgical stabilization. Overall, good outcomes were achieved in all patients with few major complications. Although treatment algorithms are intended to minimize complications and maximize good outcomes, we believe that an unintentional consequence of the recently proposed pediatric Monteggia fracture treatment guideline may be the overtreatment of these injuries. In our cohort, the majority of patients were able to avoid the operating room and surgical implants without compromising outcomes or complications. This more conservative approach, however, requires close monitoring of patients in the first 3 weeks during which most reductions were lost. Level IV-therapeutic studies, case series.