Dual plate constructs have become an increasingly common fixation technique for midshaft clavicle fractures and typically involve the use of mini-fragment plates. The goal of this technique is to reduce plate prominence and implant irritation, as these are common reasons for revision surgery. However, limited biomechanical data exist for these lower-profile constructs. The study aim was to compare dual mini-fragment orthogonal plating to traditional small-fragment clavicle plates for biomechanical non-inferiority and to determine if an optimal plate configuration could be identified, using a cadaveric model. Twenty-four cadaveric clavicles were randomized to one of six groups (n=4 per group), stratified by CT-based bone mineral content (BMC). The six different plating configurations compared were: pre-contoured superior or anterior fixation using a single 3.5-mm LC-DC plate, and four different dual-plating constructs utilizing 2.4-mm and 2.7-mm reconstruction or LC-DC plates. The clavicles were plated and then osteotomized to create an inferior butterfly fracture, which was then fixed with a single interfragmentary screw (OTA 15.2B). Axial, torsional, and bending (anterior and superior surface loading) stiffness were determined for each construct through non-destructive cyclic testing, using an MTS 858 Bionix materials testing system. This was followed by a load-to-failure test in three-point superior-surface bending. Kruskal-Wallace H and Mann-Whitney U were used to test for statistical significance. There were no significant differences in BMC (median 7.9 g, range 4.2-13.8 g) for the six groups (p=1.000). For axial stiffness, the two dual-plate constructs with a superior 2.4-mm and anterior 2.7-mm plate (either reconstruction or LC-DC) were significantly stiffer than the other four constructs (p=0.021). For both superior and anterior bending, the superior 2.4-mm and anterior 2.7-mm plate constructs were significantly stiffer when compared to the 3.5-mm superior plate (p=0.043). In addition, a 3.5-mm plate placed anterior was a stiffer construct than a superior 3.5-mm plate (p=0.043). No significant differences were found in torsional stiffness or load-to-failure between the different constructs. Dual plating using mini-fragment plates is biomechanically superior for fixation of midshaft clavicle fractures when compared to a single superior 3.5-mm plate and has similar biomechanical properties to a 3.5-mm plate placed anteriorly. With the exception of axial stiffness, no significant differences were found when different dual plating constructs were compared to each other. However, placing a 2.4-mm plate superiorly in combination with a 2.7-mm plate anteriorly might be the optimal construct, given the biomechanical superiority over the 3.5-mm plate placed superior

Introduction

Clavicle fractures accounting for 3–5% of all adult fractures are usually treated non-operatively. There is an increasing trend towards their surgical fixation.

Background:. Displaced midshaft clavicle fractures unite well in children less than 12 years old, owing to their inherent ability to remodel bone. In adolescents, remodeling occurs less and deformity or shortening can result. Recent literature in adults shows improved outcomes of these fractures with operative treatment. It has been suggested that these results may translate to adolescents. Study Objective:. To assess the effectiveness of titanium elastic TEN nails in the treatment of displaced midshaft clavicle fractures in adolescents. Methods:. Adolescent patients (age 12 to 18) with closed displaced midshaft clavicle fractures, sustained between 2008 and 2014, were treated operatively by a single surgeon, who inserted a TEN nail in an unreamed fashion from the sternal end of the clavicle. Post-operatively, patients were immobilised in a sling for 6 weeks. The nail was removed routinely at 12 weeks. All patients were assessed by the surgeon at 24 weeks with regards to the radiological outcome, Constant shoulder score, scar quality and complications. Results:. Thirteen patients, 9 males and 4 females (mean age 14,2 years) were assessed. Eleven patients had complete union by 6 weeks and the remaining two by 12 weeks. The Constant score was graded below 11 for all patients by 12 weeks follow up and all patients were satisfied with their scars after 24 weeks. Two patients developed complications: in one, the nail perforated the posterior cortex of the lateral fragment and the other developed a haematoma. Conclusion:. Operative treatment with a TEN nail is a safe, minimally invasive and reliable treatment method for displaced midshaft clavicle fractures in adolescents resulting in a satisfactory surgical outcome

Purpose. Displaced midshaft clavicular fractures are a common injury with a high occurrence rate in young, active individuals. Non-operative care has traditionally been the standard of care for such fractures, but more recent studies have suggested benefits following primary operative fixation. The purpose of this study was to review the literature on displaced midshaft clavicle fractures, identify randomized controlled trials of operative versus non-operative treatment, and pool the functional outcome and complication rates (including nonunion and symptomatic malunion), to arrive at summary estimates of these outcomes. Method. A systematic review of the literature was performed to identify studies of randomized controlled trials comparing operative versus non-operative care for displaced midshaft clavicle fractures. Meeting abstracts were also searched and included in this study. Results. Six randomized controlled trials (n=421 patients, mean Detsky score= 15.2) were identified and included. The nonunion rate was higher in the non-operative group (28/207) then it was in patients treated operatively (3/214) (p<0.001). The rate of symptomatic malunion was higher in the non-operative group (15/207) than the operative group (0/214) (p<0.001). The total complication rate was 71 complications in 214 operative cases (33%), and 93 complications in 207 non-operative cases (45%)(p=0.016). The Constant Shoulder scores (CS) and Disability of the Arm, Shoulder and Hand (DASH) scores showed marginally improved (mean 4.1 point increase in CS at one year, mean 5.8 point decrease in DASH at one year) functional values in the operative group: this difference was especially marked in the early post operative period. Conclusion. Operative treatment provided lower complication rates (especially nonunion and symptomatic malunion) and an earlier functional return compared to non-operative treatment. However, there is little evidence at present to show that the long term effects of operative intervention are significantly superior to non-operative care

Midshaft clavicle fractures can be classified into simple or complex/comminuted. The hardest fracture to treat is the severely comminuted and displaced fracture. We retrospectively compared 286 consecutive operatively treated simple (2 and 3 part) fractures with the more complex comminuted (>=4 part) midshaft clavicle fractures, looking at outcome, complication rate and union rate. Between 2008 and 2010 the senior author operated on 286 displaced midshaft clavicle fractures using a plate and screws. In this cohort there were 173 simple (2 and 3 part) fractures and 99 complex (>=4 part) fractures. The operation was performed through a limited incision technique and was standardized. All fractures were fixed with at least 3 screws on either side of the comminution. All patients were up until radiological and clinical union. A standardized questionnaire was used to assess patient satisfaction, return to work, sport and outcome at each postoperative visit. All complications were documented. All fractures eventually went onto union. There were 242 males and 44 females with the average age being 33. The complex fractures had a larger scar, took longer to return to normal motion, work and sport, and took on average 10 weeks to unite compared to 6 weeks in the simple fractures. The infection rate in the simple fractures was 1% and in the complex fractures was 2%. The big difference was the incidence of non union in the complex fractures of 10% compared to 1%; the other main difference was postoperative shoulder stiffness of 3% at 3 months in the complex fractures compared to 1 % in the simple fractures. Plate elevation/irritation was also more prevalent in the complex fractures of 10% compared to 3%. This study clearly shows there is a higher complication rate in complex fractures. Particular attention must be placed on surgical technique and anatomical reduction of these difficult fractures followed closely by postoperative rehabilitation. Future studies of clavicle fractures should specify the type of fracture being treated to give a better understanding of the potential outcome

Background. This is a continued assessment of the effectiveness of a locked intramedullary device in the treatment of acute clavicle shaft fractures. Results of patients treated thus far were assessed, including patients reported on previously. Description of methods. Patients admitted with midshaft clavicle fractures were assessed to determine whether operative fixation of the fracture was required. Indications for surgery were midshaft clavicle fractures with 100% displacement; more than 1.5 cm of shortening, presence of a displaced butterfly segment, bilateral clavicle fractures, ipsilateral displaced glenoid neck fractures, skin and neurovascular compromise. Patients that matched the criteria for surgery were treated operatively with an intramedullary locked device by the author. Post-operatively, patients were kept in a shoulder immobilizer for a period of 6 weeks. Patients were invited to attend a scheduled follow-up visit where the data was collected that comprised the review. All patients were assessed by the surgeon, a radiologist, a physiotherapist and an occupational therapist. Scar size and quality, Dash score, Constant Shoulder score, complications and the radiological picture were assessed. Summary of results. 50 patients (52 clavicle fractures – 2 patients sustained bilateral fractures), 28 males and 22 females with a mean age of 30 attended the schedule data collection visit and were included in the study. 48 clavicles achieved complete union with the remaining 4 fractures progressing normally to union at 10 and 12 weeks post surgery. No additional complications than those reported on previously were encountered. Conclusion. Locked intramedullary fixation of clavicle shaft fractures that match the criteria for operative fixation continues to give good results. No non-unions were found and a high level of patient satisfaction was achieved. The operative technique continues to be refined leading to less fixation related complications. MULTIPLE DISCLOSURES

Purpose of study:. To assess the effectiveness of a novel locked intra-medullary device in the treatment of acute clavicle shaft fractures. Description of methods:. Patients admitted with midshaft clavicle fractures were assessed for inclusion in the study. Inclusion criteria were mid shaft clavicle fractures with 100% displacement; more than 1, 5 cm of shortening or containing a displaced butterfly segment. Fractures were assessed for suitability to intra-medullary fixation (fracture distance from the medial and lateral end of the clavicle, medullary diameter and fracture type). 35 patients were treated operatively using the device by the author. Post-op, patients were kept in a master sling for a period of 6 weeks and followed up for a period of at least 3 months. Fracture reduction, fracture progression to union, scar size, Dash score, Constant Shoulder score, patient satisfaction and complications were assessed at follow-up by the surgeon, a radiologist and an occupational therapist. Summary of results:. 35 patients, 26 males and 9 females with a mean age of 29 were included in the study. All fractures treated achieved union within expected limits with no operative complications. Excellent cosmetic results were achieved in 34 patients with a high level of patient satisfaction reported. 3 patients developed post-operative complications – 2 nail failures and 1 hardware sepsis. All 3 complications were due to inferior implant placement due to initial surgeon inexperience with the device and patient non-compliance with the post-operative regime. Conclusion:. Locked intra-medullary fixation of clavicle shaft fractures that fit the criteria for operative fixation was found to be a reliable, safe method of achieving fracture reduction and fracture union in 35 patients treated. The operation is moderately demanding with a short learning curve