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Orthopedics 2018 Dec 11:1-6. Epub 2018 Dec 11.

Distal humerus fractures, which are challenging injuries seen in geriatric patients, are often repaired using open reduction and internal fixation or total elbow arthroplasty. This updated meta-analysis, which includes more recent open reduction and internal fixation techniques, examined outcomes following distal humerus fractures repaired using open reduction and internal fixation vs total elbow arthroplasty. Although distal humerus fractures treated with total elbow arthroplasty achieved statistically higher functional scores relative to those treated with open reduction and internal fixation, this difference was not clinically significant. Read More

J Neurophysiol 2018 Dec 12. Epub 2018 Dec 12.

Biomedical Sciences, New York Institute of Technology - College of Osteopathic Medicine, United States.

Previous studies have demonstrated a progression of function when healthy subjects counter a sudden mechanical load. Short-latency reflexes are linked to local stretch of the particular muscle and its antagonist. Long-latency reflexes integrate stretch information from both local sources and muscles crossing remote joints appropriate for limb's mechanical interactions. Read More

J Neurophysiol 2018 Dec 12. Epub 2018 Dec 12.

Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Canada.

Proprioception encompasses our sense of position and movement of our limbs, as well as the effort with which we engage in voluntary actions. Historically, sense of effort has been linked to centrally generated signals that elicit voluntary movements. We were interested in determining the effect of differences in limb geometry and personal control on sense of effort. Read More

Sports Med Int Open 2018 Jun 27;2(3):E79-E83. Epub 2018 Aug 27.

Manchester Metropolitan University, School of Healthcare Science, Manchester, United Kingdom.

While many older adults are immobile and frail, others still participate in competitive sports. World records of javelin throw decrease with increasing age. It is, however, unknown 1) whether the decline is linear or, as in sprint performance, accelerates beyond the age of 69; and 2) to what extent frailty-related changes in throwing technique contribute to decreasing performance. Read More

Int J Sports Phys Ther 2018 Dec;13(6):1008-1014

School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, OH.

Background: Upper extremity injuries commonly occur in baseball players, and can often necessitate surgical interventions. Athletes recovering from previous surgeries may be at greater risk of a secondary injury due to potential residual deficits in global movement. Identifying individuals with residual movement dysfunction following surgery during a pre-participation examination may help health care professionals identify baseball players who may be at a greater risk of re-injury in their throwing arms so that appropriate interventions can be developed. Read More

JB JS Open Access 2018 Sep 12;3(3):e0056. Epub 2018 Jul 12.

Mayo Clinic Arizona, Phoenix, Arizona.

Background: Controversy exists as to whether the subscapularis should be repaired after reverse shoulder arthroplasty. The purpose of the present study was to evaluate the utility of repairing the subscapularis after reverse shoulder arthroplasty with regard to complications, objective findings, and patient-reported outcome measures.

Methods: We retrospectively reviewed the records for 99 patients who had undergone a lateralized reverse shoulder arthroplasty with (n = 58) or without (n = 41) subscapularis repair. Read More

JB JS Open Access 2018 Sep 7;3(3):e0055. Epub 2018 Aug 7.

Rothman Institute, New York, NY.

Background: The purpose of this retrospective study was to compare outcomes and complications in patients with and patients without a history of non-arthroplasty surgery on the ipsilateral shoulder who later underwent total shoulder arthroplasty (TSA) or reverse total shoulder arthroplasty (RTSA). We hypothesized that patients who had undergone prior surgery would have more complications and worse clinical outcomes.

Methods: Consecutive patients who had undergone shoulder arthroplasty and had been followed for a minimum of 2 years were evaluated with the American Shoulder and Elbow Society scoring system (ASES), Simple Shoulder Test (SST), and Visual Analog Scale (VAS) assessments and with physical examination, including range-of motion assessments. Read More

Case Rep Orthop 2018 8;2018:7430297. Epub 2018 Nov 8.

Department of Orthopaedic Surgery, New York-Presbyterian Hospital, New York, USA.

"Floating elbow" injuries of the arm traditionally represent a combination of humeral shaft and forearm fractures which require anatomic rigid open reduction and internal fixation of all fractures to allow for early range of motion exercises of the elbow. There are published variants of the floating elbow injury which include ipsilateral diaphyseal humeral fracture, proximal ulna fracture with proximal radioulnar joint disruption, and ipsilateral diaphyseal humeral fracture with elbow dislocation and both bones forearm fracture. We present the case of a 21-year-old woman whose left arm became caught between the side of a waterslide and adjacent rocks at a park. Read More

Front Neurorobot 2018 23;12:77. Epub 2018 Nov 23.

Unit of the Theory of Sport and Motorics, Chair of Individual Sports, University of Physical Education and Sport, Gdańsk, Poland.

The two-segment model of the human arm is considered; the shoulder and elbow joint torques (JTs) are simulated, providing a slow, steady rotation of the force vector at any end-point of the horizontal working space. The sinusoidal waves describe the JTs, their periods coincide with that of the rotation, and phases are defined by the slopes of the correspondent lines from the joint axes to the end-point. Analysis of the JTs includes an application of the same discrete changes in one joint angle under fixation of the other one and vice versa; the JT pairs are compared for the "shoulder" and "elbow" end-point traces that pass under fixation of the elbow and shoulder angles, respectively. Read More

Indian J Anaesth 2018 Nov;62(11):913-914

Department of Anaesthesia, Seth G S Medical College and KEMH, Mumbai, Maharashtra, India.

Indian J Orthop 2018 Nov-Dec;52(6):678-681

Department of Radiology, Kokilaben Dhirubhai Ambani Hospital and Medical Research Centre, Mumbai, Maharashtra, India.

Pediatric elbow dislocations are rare injuries and are often accompanied by concomitant fractures. We report a rare case of medial dislocation of the right elbow without accompanying fracture in a 10.5-year-old boy after fall from a bicycle. Read More

Indian J Orthop 2018 Nov-Dec;52(6):590-595

Department of Orthopedic Surgery, W Hospital, Daegu, Korea.

Background: The treatment of modified Mason Type III or IV fractures is controversial. Many authors report open reduction and internal fixation (ORIF) with reconstruction of the radial head, but others advocate radial head arthroplasty (RHA). This study compares the clinical and radiological outcomes of ORIF and RHA in modified Mason Type III or IV radial head fracture and evaluates correlations between prognostic factors and postoperative clinical outcomes. Read More

Indian J Orthop 2018 Nov-Dec;52(6):584-589

Department of Trauma Surgery, University Hospital Brno, Brno, Czech Republic.

Background: Elbow dislocation is the second most frequent type of large joint dislocations in adults. Standard treatment of simple elbow dislocation (SED) without manifestation of instability includes closed reduction, short-term immobilization of the elbow followed by functional aftercare. This study evaluates SED treatment, comparing outcomes of conservative functional treatment and surgical therapy. Read More

Curr Sports Med Rep 2018 Dec;17(12):407-409

Georgetown University School of Medicine, MedStar National Rehabilitation Network, Washington, DC.

Platelet-rich plasma (PRP), as a regenerative treatment for partial ulnar collateral ligament (UCL) tears, is validated to lead to faster clinical recovery and return to play in adult athletes. However, studies examining such a role of PRP in younger pediatric and adolescent athletes are scarce. A 14-year-old adolescent throwing athlete, a right-handed pitcher, presented with chronic right medial elbow pain discovered to be secondary to a partial UCL tear, as identified on both ultrasound and magnetic resonance imaging. Read More

Tech Hand Up Extrem Surg 2018 Dec 5. Epub 2018 Dec 5.

Brighton and Sussex University Hospital, Brighton, UK.

Articular fractures of the elbow require direct reduction and interfragmentary fixation to restore anatomic stability. The fragments are often small, with limited bone stock, hence implants are often placed through the articular surface to gain maximal purchase. Traditional techniques involve the use of countersunk cortical screws or cannulated headless compression screws. Read More

Curr Opin Pediatr 2018 Dec 6. Epub 2018 Dec 6.

Pontifícia Universidade Católica do Paraná, Brasil.

Purpose Of Review: The chronic Monteggia may lead to pain, mobility limitation, progressive valgus deformity, lateral elbow instability, late ulnar nerve paralysis, and degenerative changes. In this review, we discuss the current procedures in the literature focused on correcting chronic Monteggia to avoid these complications.

Recent Findings: Correction of the ulnar deformity with elongation and angulation of the ulna in the opposite direction of the dislocation of the radial head is the most important factor for the reduction and consequent preservation of the radial head. Read More

Ann Chir Plast Esthet 2018 Dec 7. Epub 2018 Dec 7.

Service de chirurgie plastique reconstructrice et esthétique, hôpital Saint-Louis, 1, avenue Claude-Vellefaux, 75010 Paris, France.

Introduction: Regarding surgical strategy for upper limb functional rehabilitation in patients with traumatic tetraplegia, there are few publications and the case series are quite small.

Patients And Method: We reviewed all traumatic quadriplegic patients, operated one by one surgeon, professor Marc Revol, for functional surgery of the upper limb in the same department from 1989 to 2018. For each patient, we recorded their gender, their group according to the international classification, their age at the time of the first surgical procedure, the length of time between the accident and the first surgery and between two procedures, the average duration of the whole surgical program, and the surgical technique used for the elbow, the wrist, the long fingers and the thumb. Read More

J Shoulder Elbow Surg 2018 Dec 6. Epub 2018 Dec 6.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA. Electronic address:

Background: The Walch classification was introduced to classify glenoid morphology in primary glenohumeral osteoarthritis. A modified Walch classification was recently proposed, with 2 additional categories, B3 (monoconcave glenoid with posterior bone loss leading to retroversion > 15° or subluxation > 70%) and D (excessive anterior subluxation), as well as a more precise definition of subtypes A2 and C. The purpose of this study was to evaluate the intraobserver and interobserver agreement of the modified Walch classification system using both plain radiographs and computed tomography (CT). Read More

Orthop Traumatol Surg Res 2018 Dec 4. Epub 2018 Dec 4.

CHU Nice, 30, voie romaine, 06000 Nice, France.

Introduction: Surgical treatment of distal biceps tendon ruptures is recommended in an active population to avoid loss of strength, especially in supination and flexion.

Hypothesis: A double incision repair technique with immediate postoperative mobilization for acute distal biceps tendon ruptures is safe and provides good results after 2 years in active patients.

Material And Methods: Seventy-four men (47±7 years) with acute tears of the distal biceps tendon tears were included in this retrospective single-center study. Read More

J Shoulder Elbow Surg 2018 Dec 5. Epub 2018 Dec 5.

Department of Orthopedics, Tianjin Hospital, Tianjin University, Tianjin, China.

Background: Proximal humeral fractures represent the third most common fragility fracture treated in osteoporotic populations, after hip and distal radial fractures. The purpose of this study was to characterize the spatial variability in cortical geometry in the proximal humerus in postmenopausal women.

Methods: The proximal humeri in 43 healthy postmenopausal women were imaged by computed tomography. Read More

J Shoulder Elbow Surg 2018 Dec 4. Epub 2018 Dec 4.

Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA. Electronic address:

Background: Chronic massive rotator cuff tears heal poorly and often retear. This study investigated the effect of adipose-derived stem cells (ADSCs) and transforming growth factor-β3 (TGF-β3) delivered in 1 of 2 hydrogels (fibrin or gelatin methacrylate [GelMA]) on enthesis healing after repair of acute or chronic massive rotator cuff tears in rats.

Methods: Adult male Lewis rats underwent bilateral transection of the supraspinatus and infraspinatus tendons with intramuscular injection of botulinum toxin A (n = 48 rats). Read More

J Shoulder Elbow Surg 2018 Dec 6. Epub 2018 Dec 6.

Sports Medicine and Shoulder Service, Hospital for Special Surgery, New York, NY, USA.

Background: Injury to the lateral ulnar collateral ligament (LUCL) complex of the elbow often results in posterolateral rotatory instability. Although surgical reconstruction of the LUCL is often required, gaps in our understanding of the LUCL complex remain. The purpose of this study was to provide a robust and accurate characterization of the lateral elbow ligamentous complex. Read More

J Emerg Med 2018 Dec 6. Epub 2018 Dec 6.

Department of Orthopaedic Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthopaedics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.

Background: Anterior dislocation of the glenohumeral joint is a common upper extremity injury in orthopedic and emergency medicine. The aim of this study was to introduce a novel reduction technique, "elbow technique," for anterior shoulder dislocations.

Discussion: This study included 26 patients with anterior shoulder dislocation who were treated using the elbow technique in our hospital's emergency department between October 2014 and December 2015. Read More

Am J Trop Med Hyg 2018 Dec 10. Epub 2018 Dec 10.

Department of Internal Medicine, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh.

From April to September 2017, Bangladesh experienced a huge outbreak of acute Chikungunya virus infection in Dhaka. This series describes the clinical and laboratory features of a large number of cases (690; 399 confirmed and 291 probable) suffered during that period. This observational study was carried out at Dhaka Medical College Hospital, Bangladesh. Read More

Sports Biomech 2018 Dec 11:1-16. Epub 2018 Dec 11.

d Department of Biomedical Engineering , National Cheng Kung University , Tainan , Taiwan.

This study examined the morphologic changes of the ulnar nerve in different elbow positions by ultrasonography and the effects of fatigue on forearm muscle control during overhand movements. We enrolled 12 tennis players who performed flat serves and 15 baseball pitchers who performed fastball pitching. The motion capture was conducted with 14 reflective markers attached on anatomic landmarks of the participant for tennis serve and baseball pitching data collection. Read More

J Sport Rehabil 2018 Dec 11:1-30. Epub 2018 Dec 11.

2 Department of Orthopaedic Surgery, Konkuk University School of Medicine, Seoul, Republic of Korea.

Background:: The knowledge of 3-dimensional (3D) scapular kinematics is essential for understanding the pathological lesions of shoulder and elbow in throwing athletes. Many studies about alterations of resting scapular position, dynamic scapular motion, or scapular dyskinesis(SD) have been conducted, yet none of them have identified a consistent pattern of altered scapular kinematics in throwing athletes.

Hypothesis/purpose:: To analyze the 3D scapular kinematics of dominant and non-dominant arms in baseball players with a pathological condition of shoulder or elbow. Read More

Clin Anat 2018 Dec 6. Epub 2018 Dec 6.

Department of Clinical Anatomy, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan.

Introduction: To improve the management outcomes and diagnostic accuracy of the ulnar collateral ligament (UCL) injury, the anatomy of the medial side of the elbow joint is necessary to be understood in terms of the periarticular surroundings rather than the specific ligaments. The aim of this study was to anatomically clarify the medial side of the elbow joint in terms of the tendinous structures and joint capsule.

Materials And Methods: We conducted a descriptive anatomical study of 23 embalmed cadaveric elbows. Read More

World J Methodol 2018 Nov 29;8(3):37-39. Epub 2018 Nov 29.

Department Health Sciences, School of Sciences, European University Cyprus, Nicosia 1516, Cyprus.

Lateral elbow tendinopathy (LET) is one of the two most common tendinopathies of the upper limb. The most effective treatment in the management of LET is the exercise program. Clinicians combine exercise program with other physiotherapy, electrotherapeutic and no, techniques. Read More

J Shoulder Elbow Surg 2018 Dec 3. Epub 2018 Dec 3.

Centre for Orthopedics, Trauma Surgery and Spinal Cord Injury, Heidelberg University Hospital, Heidelberg, Germany.

Background: Products from metal wear have been identified as a potential cause of adverse local tissue reactions and implant failure in total hip arthroplasty. However, the role of metal ion exposure in patients after total shoulder replacement is unclear. The objective of the present study was to determine in vivo blood metal ion levels of cobalt, chromium, and titanium in patients after anatomic total shoulder arthroplasty (TSA) or reverse TSA. Read More

J Occup Environ Med 2018 Nov 29. Epub 2018 Nov 29.

Rocky Mountain Center for Occupational and Environmental Health (RMCOEH) (Ms Yoon, Dr Thiese, Dr Ott, Dr Wood, Dr Hegmann); Center for Ergonomics, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin (Dr Kapellusch, Dr Foster); Department of Mechanical Engineering (Dr Merryweather), University of Utah, Salt Lake City, Utah; Allina Health Clinics, Minneapolis, Minnesota (Dr Drury).

Objective: To quantify sensitivity and specificity of the tender points and demonstrate how variability in case definition impacts prevalence of lateral epicondylitis (LE).

Methods: Baseline data analyzed from 1216 workers from the WISTAH study, a multicenter prospective cohort study of upper extremity musculoskeletal disorders. All workers completed computerized questionnaires, structured interviews, and two independent physical examinations in accordance with an established protocol. Read More

Clin Physiol Funct Imaging 2018 Dec 2. Epub 2018 Dec 2.

Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi, University, MS, USA.

The purpose was to examine the acute skeletal muscle response to high load exercise and low-load exercise with and without different levels of applied pressure (BFR). A total of 22 participants completed the following four conditions: elbow flexion exercise to failure using a traditional high load [70% 1RM, (7000)], low load [15% 1RM,(1500)], low load with moderate BFR [15%1RM+40%BFR(1540)] or low load with greater BFR [15% 1RM+80%BFR(1580)]. Torque and muscle thickness were measured prior to, immediately post, and 15 min postexercise. Read More

PeerJ 2018 23;6:e6003. Epub 2018 Nov 23.

Research and Development, Driveline Baseball, Inc, Kent, WA, United States of America.

Background: Weighted-baseball training programs are used at the high school, collegiate, and professional levels of baseball. The purpose of this study was to evaluate the effects of a six-week training period consisting of weighted implements, manual therapy, weightlifting, and other modalities on shoulder external rotation, elbow valgus stress, pitching velocity, and kinematics.

Hypothesis: A six-week training program that includes weighted implements will increase pitching velocity along with concomitant increases in arm angular velocities, joint kinetics, and shoulder external rotation. Read More

Indian J Plast Surg 2018 May-Aug;51(2):137-144

Department of Plastic Surgery, Bombay Hospital and Institute of Medical Sciences, Mumbai, Maharashtra, India.

Objective: To study the correlation of compound muscle action potential of donor nerves with the recovery of elbow flexion in Oberlin transfer in brachial plexus injury.

Introduction: Distal nerve transfer using motor fascicle of ulnar or median nerve to restore elbow flexion is a part of reconstructive surgery after upper brachial plexus injury, first described by Oberlin . However, one of the most critical influences on functional outcome is number of functioning motor axons in donor fascicle which is reflected by its compound muscle action potential. Read More

Knee 2018 Nov 29. Epub 2018 Nov 29.

Houston Methodist Othopedics & Sports Medicine, Houston, TX, United States of America. Electronic address:

Nail-patella syndrome (NPS) or hereditary onycho-osteodyaplasia is a rare genetic condition involving a mutation in the LMX1B gene affecting nails, elbows, knees, and pelvis. Due to the regulatory functions of the gene in many developmental processes through the body, patients with NPS experience wide-ranging musculoskeletal problems including patellar instability, fingernail anomalies, iliac exostoses/horns, and elbow abnormalities. The patellar changes often involve aplasia, hypoplasia, and chronic dislocation. Read More

J Shoulder Elbow Surg 2018 Nov 29. Epub 2018 Nov 29.

Department of Orthopaedic Surgery, Medical College of Wisconsin, Milwaukee, WI, USA. Electronic address:

Background: Recent orthopedic research has questioned the effect of opioid use on surgical outcomes. This study investigated this in the context of arthroscopic rotator cuff repair. We hypothesized that preoperative opioid use would be associated with inferior outcomes and greater postoperative opioid requirements. Read More

J Shoulder Elbow Surg 2018 Nov 28. Epub 2018 Nov 28.

Shoulder Service, Department of Orthopedic Surgery, Massachusetts General Hospital, Boston Shoulder Institute, Boston, MA, USA. Electronic address:

Background: Since the approval of reverse shoulder arthroplasty (RSA) in 2004, the use of shoulder arthroplasty increased dramatically. Although the success of RSA in the revision setting has been demonstrated, there remains a paucity of studies examining the epidemiology of RSA in revision arthroplasty. This study describes trends of revision arthroplasty during the "era of the reverse," from 2005 through 2016. Read More

J Shoulder Elbow Surg 2018 Nov 28. Epub 2018 Nov 28.

Orthopaedic Surgery and Rehabilitation, William Beaumont Army Medical Center, El Paso, TX, USA.

Background: Medial ulnar collateral ligament (MUCL) reconstruction outcomes are well described in competitive throwers but not in nonthrowers. This investigation elucidated epidemiologic variables, functional outcomes, and prognostic factors after MUCL reconstruction in young active patients.

Methods: United States military service members undergoing MUCL reconstruction were isolated using the Management Analysis and Reporting Tool (M2) database from 2009 to 2016. Read More

J Shoulder Elbow Surg 2018 Nov 30. Epub 2018 Nov 30.

Shoulder & Elbow Clinic, Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea. Electronic address:

Hypothesis: We hypothesized that a new method considering the humeral head would distinguish rotator cuff tears (RCTs) and osteoarthritis (OA) better than the critical shoulder angle (CSA).

Methods: A total of 1011 patients were tested in this study and divided into 4 groups: those with RCTs (n = 493), those with OA (n = 73), those with anterior instability (n = 361), and those with adhesive capsulitis (n = 84). The CSA and new radiologic parameters including the humeral head were measured in the true anterior-to-posterior view: the Y angle connecting the lower end of the glenoid (LG), the center of the humeral head (CH), and the upper end of the glenoid (UG); the G angle connecting UG, CH, and the lateral tip of the acromion; the YG angle connecting LG, CH, and the lateral tip of the acromion; and the R angle connecting UG, LG, and CH. Read More

J Shoulder Elbow Surg 2018 Nov 30. Epub 2018 Nov 30.

Department of Orthopedic Surgery and Sports Medicine, Mayo Clinic, Rochester, MN, USA. Electronic address:

Background: The incidence of posterior shoulder instability (PSI) in the general population is not well defined. This study aimed to define the population-based incidence of PSI and describe trends in incidence and surgery rates.

Methods: The study population included 143 patients (16 females, 127 males) diagnosed with new-onset PSI between January 1, 1994, and December 31, 2015. Read More

J Shoulder Elbow Surg 2018 Nov 28. Epub 2018 Nov 28.

Department of Traumatology, Orthopaedics and Hand Surgery, University of Medical Sciences in Poznan, Poznań, Poland.

Hypothesis And Background: Proprioception is an important element of shoulder dynamic stability. It has been shown to be affected in cases of capsular or labral injuries of the glenohumeral joint. Therefore, this study was conducted to investigate bilateral shoulder proprioception by active reproduction of joint position both in patients with post-traumatic recurrent unilateral shoulder instability and in normal healthy volunteers. Read More

J Shoulder Elbow Surg 2018 Nov 27. Epub 2018 Nov 27.

Department of Paediatric and Adolescent Surgery, Medical University of Graz, Graz, Austria.

Background: Only few reports have described the outcome of pediatric patients following radial head resection. Therefore, the aim of the present study was to assess clinical and radiologic outcome of patients with open physes following resection of the radial head.

Materials And Methods: Skeletally immature patients treated with resection of the radial head were included. Read More

J Shoulder Elbow Surg 2018 Nov 27. Epub 2018 Nov 27.

Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Science, Nagoya, Japan; Department of Sports and Fitness, Faculty of Wellness, Shigakkan University, Obu, Japan. Electronic address:

Background: The differences between young right-handed and left-handed baseball players are not well known. This study compared the range of the shoulder motion and humeral torsion angle (HTA) between right-handed and left-handed young baseball pitchers.

Methods: A total of 65 young baseball pitchers (age, 9-12 years; 46 right-handed throwers, R group; and 19 left-handed throwers, L group) were analyzed. Read More

J Shoulder Elbow Surg 2018 Nov 28. Epub 2018 Nov 28.

Department of Surgery, McMaster University, Hamilton, ON, Canada. Electronic address:

Background: Hyaluronic acid (HA) is an analgesic and chondroprotective agent often used for the nonoperative treatment of osteoarthritis (OA). The effects of HA injections are well studied in the treatment of knee OA, but the effects in glenohumeral OA remain unclear. This study evaluated the efficacy of HA to reduce pain in patients with glenohumeral OA. Read More

J Hand Surg Am 2018 Nov 27. Epub 2018 Nov 27.

Hand and Elbow Section, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL.

Purpose: The aim of this study was to assess the treatment and complications of a distinct type of partial intra-articular distal radius fracture.

Methods: Seven patients treated by the senior author between 2008 and 2013 for a partial intra-articular distal radius fracture with isolated involvement of the volar lunate facet were included. All fragments had the distinctive shape of a triangular-base pyramid (tetrahedron) extending from the metaphysis distally. Read More

J Hand Surg Am 2018 Nov 27. Epub 2018 Nov 27.

Department of Orthopaedic Surgery, Geisinger Medical Center, Danville, PA.

Purpose: To assess the use of preoperative, dynamic ultrasound to predict ulnar nerve instability following in situ decompression for cubital tunnel syndrome.

Methods: Prior to undergoing in situ decompression, 43 consecutive patients underwent dynamic ultrasound to assess the stability of the ulnar nerve during elbow flexion. The dynamic ultrasound findings were compared with the intraoperative assessment of nerve stability following in situ decompression. Read More

J Hand Surg Am 2018 Nov 27. Epub 2018 Nov 27.

Roth|McFarlane Hand and Upper Limb Center, St Joseph's Health Care, University of Western Ontario, London, Ontario, Canada.

Purpose: The anatomy of the radial head and capitellum has been extensively studied; however, the anatomy of the radial notch of the ulna (RNU) has received little attention. This imaging-based anatomic study characterizes the morphology of the RNU.

Methods: Ninety-eight cadaveric arms (57 male, 72 ± 14 y) were imaged with computed tomography, and 3-dimensional reconstructions of the proximal ulna were constructed. Read More

Structure 2018 Dec;26(12):1570-1572

Department of Microbiology and Immunology, The University of British Columbia, Vancouver, British Columbia, V6T1Z3, Canada. Electronic address:

In this issue of Structure, Wang et al. (2018) present the crystal structure of a bacterial Y RNA effector-binding domain. The domain is conserved across many bacteria and despite a reordering of key tRNA features, the structure closely mimics the overall fold and base pairing of the tRNA elbow. Read More

Am J Orthop (Belle Mead NJ) 2018 Nov;47(11)

Columbia University, Center for Shoulder, Elbow and Sports Medicine, 622 W 168th Street, 11th Floor, New York, New York 10032, USA. Email:

Ice hockey is a fast-paced, collision sport requiring tremendous skill and finesse, yet ice hockey can be a harsh and violent game. It has one of the highest musculoskeletal injury rates in all of competitive sports. Razor sharp skates, aluminum sticks and boards made from high density polyethylene (HDPE), all contribute to the intrinsic hazards of the game. Read More

J Bone Joint Surg Am 2018 Dec;100(23):2066-2072

Department of Orthopedic Surgery, Gumi CHA University Hospital, Gumi, South Korea.

Background: Although simple posterolateral or posterior elbow dislocations are relatively common and usually stable after closed reduction, simple posteromedial dislocations are extremely rare and poorly characterized. We investigated the clinical characteristics, soft-tissue injury patterns, treatments, and outcomes of a series of posteromedial elbow dislocations without relevant osseous lesions.

Methods: We retrospectively reviewed 20 cases of simple posteromedial elbow dislocations without relevant osseous lesions that were treated at 7 fellowship training hospitals during a 10-year period. Read More