Do the humeral radiographic changes at 5-year follow-up affect the clinical outcomes of press-fit humeral stems in primary reverse shoulder arthroplasties?

INTRODUCTION: The purposes of this study were to analyze and compare the functional outcomes and radiological changes around the press-fit humeral components in two contemporary medialized reverse total shoulder arthroplasty (RTSA) systems at a minimum of 5-year follow-up. MATERIALS AND METHODS: Between December 2003 and December 2015, 249 consecutive RTSAs were performed at our hospital. Of these, 68 primary uncemented RTSA met our inclusion criteria. The Constant-Murley score (CMS), the modified Constant score, a visual analog scale (VAS) and active shoulder range of motion (ROM) were measured pre- and postoperatively. Radiological assessment was performed by plain radiographs at a minimum of 5 years postoperatively. RESULTS: At a mean follow-up of 80.2 months, there was no significant difference (p = .59) between the postoperative functional scores and range of motion of the two groups (Delta Xtend and Lima SMR). Radiological data of stress-shielding were observed in 38 patients (55.9%) being slightly more frequent in the Lima SMR group (21 patients) than in the Delta Xtend group (17 patients) (p = .62). CONCLUSIONS: Our study shows that the good functional results are similar between the two uncemented RTSA systems used and that they do not depend on the presence of radiological changes (stress-shielding) in the humeral stem at a minimum 5-year follow-up.

Neuropathy of the suprascapular and axillary nerves in rotator cuff arthropathy: a prospective electrodiagnostic study.

PURPOSE: Prevalence of axillary (AN) and/or suprascapular (SSN) neuropathy in rotator cuff tear arthropathy (RCTA) is unknown. We aimed to prospectively evaluate for preoperative neurodiagnostic abnormalities in order to determine their prevalence, location, and influence on reverse shoulder arthroplasty (RSA) outcomes. METHODS: Patients who underwent RSA for RCTA were prospectively included. An electromyography and nerve conduction study were performed pre and post-surgery. Clinical situation: VAS, Relative Constant-Murley Score (rCMS) and ROM over a minimum of two years follow-up. RESULTS: Forty patients met the inclusion criteria; mean follow-up was 28.4 months (SD 4.4). Injuries in RCTA were present in 83.9% (77.4% in AN and 45.2% in SSN). There were no differences on preoperative VAS, ROM, and rCMS between patients with and without preoperative nerve injuries. Four acute postoperative neurological injuries were registered under chronic preoperative injuries. Six months after RSA, 69% of preoperative neuropathies had improved (82.14% chronic injuries and 77.7% disuse injuries). No differences in improvement between disuse and chronic injuries were found, but patients with preoperative neuropathy that had not improved at the postoperative electromyographic study at six months, scored worse on the VAS (1.44 vs 2.66; p .14) and rCMS (91.6 vs 89.04; p .27). CONCLUSIONS: The frequency of axillary and suprascapular neuropathies in RCTA is much higher than expected. Most of these injuries improve after surgery, with almost complete neurophysiological recovery and little functional impact on RSA. However, those patients with preoperative neuropathies and absence of neurophysiological improvement six months after surgery have lower functional results.

Adjuvant Arthroscopy Does Not Improve the Functional Outcome of Volar Locking Plate for Distal Radius Fractures: A Randomized Clinical Trial.

PURPOSE: To evaluate the outcomes of adding arthroscopy to osteosynthesis of distal radius fractures (DRF) with volar locking plate (VLP), by Patient-Rated Wrist Evaluation (PRWE) 1 year after surgery. METHODS: In total, 186 functionally independent adult patients who met the inclusion criteria (DRF and a clinical decision for surgery with a VLP) were randomized to arthroscopic assistance or not. Primary outcome was PRWE questionnaire results 1 year after surgery. For the main variable, PRWE, we obtained the minimal clinically important difference based on a distribution-based method. Secondary outcomes included Disabilities of the Arm, Shoulder and Hand and 12-Item Short Form Health Survey questionnaires, range of motion, strength, radiographic measures, and presence of joint step-offs by computed tomography. Data were collected preoperatively and at +1 and +4 weeks, +3 and +6 months, and +1 year after surgery. Complications were recorded throughout the study. RESULTS: In total, 180 patients (mean age: 59.0 ± 14.9 years; 76% women) were analyzed by modified intention to treat. A total of 82% of the fractures were intra-articular (AO type C). No significant difference between arthroscopic (AG) and control (CG) groups in median PRWE was found at +1 year (median AG: 5.0, median CG: 7.5, difference in medians 2.5; 95% confidence interval [CI] -2.0, 7.0, P = .328). The proportion of patients who exceeded the minimal clinically important difference of 12.81 points in the AG and CG was 86.4% vs 85.1%, P = .819, respectively. Percentage of associated injuries and step-offs reduction maneuvers was greater with arthroscopy (mean differences: 17.1 95% CI -0.1, 26.1, P < .001) and 17.4 (95% CI 5.0, 29.7, P = .007). The difference in percentage of residual joint step-offs at the postsurgical computed tomography in radioulnar, radioscaphoid, and radiolunate joints was not significant (P = .990, P = .538, and P = .063). Complications were similar between groups (16.9% vs 20.9%, P = .842). CONCLUSIONS: Adjuvant arthroscopy did not significantly improve PRWE score +1 year after surgery for DRF with VLP, although the statistical power of the study is below the initially estimated to detect the expected difference. LEVEL OF EVIDENCE: Level I, randomized controlled trial.

Functional results of Circumferential Capsular Release in adhesive shoulder capsulitis. Comparative study of patients over and under fifty years of age.

INTRODUCTION: The aim of our study is to evaluate the functional and mobility outcomes in patients who have undergone arthroscopic circumferential arthrolysis of the shoulder and to find out if there are differences in the results in relation to the patient's age. MATERIALS AND METHODS: This is a retrospective case series of patients with idiopathic adhesive capsulitis treated by arthroscopic 360º circumferential capsulotomy in lateral position and followed for a minimum of 2 years. Range of motion (ROM), functional outcomes using the Constant Score (CS), health-related quality of life outcomes with the EuroQol Five Dimensions tool (EQ-5D), pain using the Visual Analogue Scale (VAS). RESULTS: A total of 26 shoulders were included, 10 men (41.7%) and 14 women (58.3%), with 2 patients being bilateral. The mean age was 48.64 ± 7.5 years, and the mean follow-up was 50.2 months. Postoperative ROM improved significantly compared to preoperative ROM (p < 0.05). Shoulder forward flexion improved by 38.6° (95%CI 22.3-54.9, p < 0.01), abduction by 35.2° (95%CI 17.6-52.8, p < 0.01) and external rotation by 21.9° (95%CI 12.8-30.9, p < 0.01 p < 0.01). Median internal rotation improved from buttock to T12 (p < 0.01). The mean improvement in CS was 54.3 ± 24.4 points (p < 0.01). The EQ-5D and VAS scores at the end of follow-up were 0.73 ± 0.23 and 2.73 ± 2.55, respectively. There were no statistical differences between young patients and patients aged 50 years or older in ROM or functional results. CONCLUSIONS: Patient age did not affect outcomes significantly, with patients older than 50 years showing similar results to younger patients.

Suprascapular nerve injury after reverse total shoulder arthroplasty: correlation with screw out of vault penetration and functional situation: prospective study.

BACKGROUND: Baseplate screws have been suggested as a possible cause of suprascapular neuropathy after reverse total shoulder arthroplasty. This study aims to investigate the association between screw penetration out of the vault, electromyographic study, and the clinical outcomes. METHODS: A total of 31 patients who underwent reverse total shoulder arthroplasty for cuff tear arthropathy were prospectively enrolled. They were followed up for a minimum of 24 months. All patients underwent computed tomography 6 months postoperatively to determine the extraosseous position of the screws (perforation of the second bone cortex and protrusion into the supra- or infraspinatus fossa). Electrodiagnostic evaluation was performed preoperatively and postoperatively to stablish any relation between cortex perforation of the screw and suprascapular nerve (SSN) injury. Clinical outcomes pre- and postoperatively (Constant score, ranges of motion, and visual analog scale) of patients with and without documented injury were recorded. RESULTS: A total of 14 patients (45.2%) had an abnormal preoperative SSN electrodiagnostic study (chronic or disuse injuries), and 6 patients (19.4%) had an abnormal postoperative study (acute injury). Of the 6 patients, 2 cases appeared over the pre-existing lesion and 4 appeared over an intact preoperative nerve, all of them affecting the infraspinatus branch of the SSN. Perforation of the second cortex was detected for 60% of superior screws and 40% of posterior screws. The mean lengths of the superior and posterior screws were 30 and 18.2 mm, respectively. Patients with screw perforation of the second cortex were assessed as having a high risk of nerve injury (40% vs. 9.5%). CONCLUSIONS: Preoperative SSN injuries do not have a significant clinical impact and do not predispose to an acute postoperative SSN lesion. The Constant score and visual analog scale score for patients with acute SSN injuries were not statistically different from those without SSN injury. The extraosseous position of the screw increases the probability of an SSN injury to 31%. This risk is higher with the posterior screw, which leads us to question whether it is really necessary to use it.

Shoulder problems after percutaneous antegrade intramedullary nailing in humeral diaphyseal fractures using contemporary straight third-generation nail.

BACKGROUND: Antegrade intramedullary nailing in humeral shaft fracture has been abandoned by certain orthopedic surgeons because of rotator cuff injury caused by first- and second-generation intramedullary nails (IMNs). However, only a few studies have specifically addressed the results of antegrade nailing for the treatment of humeral shaft fractures with a straight third-generation IMN; thus, complications need to be re-evaluated. We hypothesized that fixation of displaced humeral shaft fractures with a straight third-generation antegrade IMN with the percutaneous technique avoid shoulder problems (stiffness and pain) incurred by first- and second-generation IMNs. METHODS: This was a retrospective, single-center, nonrandomized study of 110 patients with a displaced humeral shaft fracture between 2012 and 2019 treated surgically with a long third-generation straight IMN. Mean follow-up was 35.6 months (range, 15-44 months). RESULTS: There were 73 women and 37 men with a mean age of 64.7 ± 19 years. All fractures were closed (37.3% 12A1, 13.6% 12B2, and 13.6% 12B3 AO/OTA classification). Mean Constant score was 82 ± 19, Mayo Elbow Performance Score 96 ± 11 and the mean EQ-5D visual analog scale score was 69.7 ± 21.5. Mean forward elevation 150° ± 40°, abduction 148° ± 45°, and external rotation 38° ± 15°. Symptoms associated with rotator cuff disease were present in 6.4%. Evidence of radiographic fracture healing was detected in all but 1 case. One postoperative nerve injury and 1 adhesive capsulitis were present. Overall, 6.3% underwent second surgeries (4.5% were minor surgeries like hardware removal). CONCLUSION: Percutaneous antegrade intramedullary nailing of humeral shaft fractures with a straight third-generation nail considerably reduced complications related to shoulder problems and achieved good functional results.

Does fluoroscopy improve baseplate position compared to conventional technique in reverse shoulder arthroplasty? A preliminary study.

Background: Accurate placement of glenoid component in reverse shoulder arthroplasty remains a challenge for surgeons of all levels of expertise; however, no studies have evaluated the utility of fluoroscopy as a surgical assistance method. Methods: Prospective comparative study of 33 patients undergoing primary reverse shoulder arthroplasty during a 12-month period. Fifteen patients had a baseplate placed using the conventional "free hand" technique (control group), and 18 patients using intraoperative fluoroscopy assistance group, in a case-control design. Postoperative glenoid position was evaluated on postoperative Computed Tomography (CT) scan. Results: The mean deviation of version and inclination for fluoroscopy assistance vs. control group was 1.75° (0.675-3.125) vs. 4.2° (1.975-10.45) (p = .015), and 3.85° (0-7.225) vs. 10.35° (4.35-18.75) (p = .009). The distance from the central peg midpoint to the inferior glenoid rim (fluoroscopy assistance 14.61 mm/control 4.75 mm, p = .581) and the surgical time (fluoroscopy assistance 1.93 ± 0.57/control 2.18 ± 0.44 h, p = .400) showed no differences, with an average radiation dose of 0.45 mGy and fluoroscopy time of 14 s. Conclusions: Accurate axial and coronal scapular plane positioning of glenoid component is improved with intraoperative fluoroscopy at the cost of a greater radiation dose and without differences in surgical time. Comparative studies are needed to determine whether their use in relation to more expensive surgical assistance systems result in similar effectiveness.L evel of evidence : Level III, therapeutic study.

The Spanish version of the Constant-Murley Shoulder Score: translation, cultural adaptation, and validity.

BACKGROUND: The Constant-Murley Score (CMS) is one of the most employed tools for assessing shoulder function. It was first devised in 1987 for the English population and is now widely used internationally. However, it had yet to be cross-culturally adapted and validated to Spanish, which is the world's second-most native language. Formal adaptation and validation of clinical scores is paramount for them to be used with rigorous scientific methodology. METHODS: Following international recommendations for the cross-cultural adaptation of self-report measures, the CMS was first adapted into Spanish in six stages: translation, synthesis, back-translation, a review by expert committee, pretesting, and final appraisal by expert committee. After conducting a pretest with 30 individuals, the Spanish version of the CMS was tested on 104 patients with various shoulder pathologies to assess content, construct, criterion validity, and reliability. RESULTS: No major conflicts were encountered in the process of cross-cultural adaptation, with 96.7% of pretested patients having a full understanding of every item in the test. The validation showed excellent content validity (content validity index = .90), construct validity (strong correlation between items within the same subsection of the test), and criterion validity (CMS - Simple Shoulder Test, Pearson r = .587, P = .01; CMS - American Shoulder and Elbow Surgeons, Pearson r = .690, P = .01). Reliability of the test was also excellent, with high internal consistency (Cronbach's α = .819), interrater reliability (intraclass correlation coefficient = .982), and intrarater reliability (intraclass correlation coefficient = .937), without showing ceiling or floor effects. CONCLUSION: Spanish version of the CMS has been proved to accurately reproduce the original score and to be easily comprehensible by native Spanish speakers with acceptable intrarater-interrater reliability and construct validity. INTRODUCCIóN: La escala de Constant-Murley (CMS) es una de las más empleadas para evaluar la función del hombro. Se ideó por primera vez para la población inglesa en 1987 y actualmente es ampliamente empleada a nivel internacional. Sin embargo, su validación y adaptación transcultural no se han realizado al español, la segunda lengua nativa más hablada en el mundo. Actualmente no puede resultar admisible el empleo de escalas en las que no tengamos la seguridad de que existe una equivalencia conceptual, cultural y lingüística entre la versión original y la empleada. MATERIAL Y MéTODO: La versión traducida al español de la CMS se realizó siguiendo las recomendaciones internacionales: traducción, síntesis de la traducción, retrotraducción, revisión por comité de expertos, pretest y validación. Tras la realización del pretest en 30 individuos, la versión española de la escala de CMS se probó en 104 pacientes con diferentes patologías de hombro para evaluar las propiedades psicométricas de la escala: contenido, constructo, validez de criterio y fiabilidad. RESULTADOS: No se encontraron problemas importantes durante el proceso de adaptación transultural con un entendimiento completo de todos los ítems del pretest por el 96.7% de los pacientes. La escala adaptada demostró una excelente validez de contenido (índice de validez de contenido = .90), de constructo (fuerte correlación entre ítems de la misma subsección del test), y de criterio (CMS-SST Pearson's r = .587, p = .01; CMS-ASES Pearson's r = .690, p = .01). La Fiabilidad del test resultó excelente, con una elevada consistencia interna (Cronbach's α = .819), fiabilidad interobservador (ICC = .982) e intraobservador (ICC = .937), sin efectos techo y suelo. CONCLUSIóN: La versión Española de la CMS garantiza la equivalencia con respecto al cuestionario original. Los presentes resultados, sugieren que esta versión es válida, fiable y reproducible para la evaluación de la patología de hombro en nuestro entorno.

Synovial Sarcoma of the Foot as an Atypical Cause of Persistent Metatarsalgia: A Report of 3 Cases.

CASE: Three cases of atypical metatarsalgia are presented, all diagnosed with foot synovial sarcomas (SSs) at different stages of evolution, after a year of medical consultations. One case was treated with marginal excision without requiring bone excision; the second patient required amputation of the first ray; and the third patient, with advanced disease, required amputation through Chopart's joint. CONCLUSION: Metatarsalgia is a recurrent reason for consultation in orthopaedics. Even so, patients with persistent symptoms should be studied further in depth. Computed tomography or magnetic resonance imaging can detect tumor pathology, such as SS, of insidious development.

Simultaneous bilateral extracapsular proximal femur fractures in the elderly. A case report.

Simultaneous and bilateral proximal femoral fractures (PFF) are rare and have scarcely been reported in the literature. A case of a bilateral extracapsular PFF is herein presented. Besides, an exhaustive review of the literature was performed, analyzing the information of all previously reported cases. An 81-year-old woman, who suffered a casual fall, was diagnosed with bilateral PFF consisting of both a subtrochanteric and an intertrochanteric fracture. She underwent concurrent intramedullary fixation for both fractures without any relevant complication and started early ambulation. Simultaneous bilateral extracapsular PFF are exceptional, with only 23 cases described in the current literature. In the elderly, they deserve special attention with treatment strategies in between the ones for unilateral hip fractures and those provided to old multiply injured patients. PFF management is not well established. Minimal reaming and careful nailing can be safely performed bilaterally under close monitoring, in order to start an early functional recovery.

Poor Results After Arthroscopic Treatment of Irreparable Rotator Cuff Tears Using a Subacromial Balloon Spacer.

INTRODUCTION: Arthroscopic balloon spacer arthroplasty (BSA) is a relatively recent procedure for patients with irreparable rotator cuff tears, conceived to prevent degenerative joint changes and relieve subacromial pain. METHODS: This is a retrospective case series of 16 consecutive patients treated with BSA and followed up for a minimum 12 months. Besides BSA, partial tendon repair was done whenever possible. Radiographical parameters such as acromiohumeral distance and Hamada stage were measured preoperatively and postoperatively. Range of motion, functional results (Constant score; Simple Shoulder Test; American Shoulder and Elbow Surgeons score; and Disabilities of the Arm, Shoulder, and Hand score), health-related quality of life results with the EuroQol Five Dimensions tool, complications, and patient satisfaction were also analyzed. RESULTS: The mean age was 64 ± 10.3 years, and the male/female ratio was 6/10. Partial repair was achieved in five patients (31.2%) and did not influence functional or health-related quality of life results ( P = 0.11). The mean acromiohumeral distance and Hamada stage worsened from preoperative measures (3.7 ± 2.0 mm and 2.3 ± 1.1) to final follow-up measures (3.1 ± 2.4 mm and 3.1 ± 1.3). Shoulder abduction increased by 7.8° ± 26.8° and forward flexion decreased by 25.5° ± 32.4° after surgery. The functional results at the final follow-up were Constant 49.5 ± 18.0; American Shoulder and Elbow Surgeons 60.2 ± 27.2; Simple Shoulder Test 8.5 ± 4.6; and Disabilities of the Arm, Shoulder, and Hand 32.7 ± 12.1. The mean index value for the EuroQol Five Dimensions was 0.79, and perceived quality of life was 85.6 ± 15.4 of 100 points. 62.5% of the patients (10) were satisfied with surgery. The complication rate was 13% (2), accounting for one deep infection and one balloon migration. CONCLUSION: Theoretical benefits of BSA for delaying superior humeral head translation and arthropathic changes could not be demonstrated in our series. Its functional results and satisfaction rates are low, but self-reported quality of life after surgery does not seem impaired. Complications do not occur frequently but require reintervention and endanger joint viability. LEVEL OF EVIDENCE: Level IV (case series).

Elongation of the brachial plexus after reverse shoulder arthroplasty: an anatomical study.

INTRODUCTION: The use of reverse shoulder arthroplasty (RSA) is becoming more extended and its clinical results are good or excellent according to the literature. The main biomechanical characteristic of RSA is that it lowers and medializes the centre of rotation of the shoulder causing an arm lengthening. Although the number of neurological complications is low (5%), there are more neurophysiological changes in the brachial plexus with RSA than with the anatomic shoulder arthroplasty. The main goal of this study was to quantify the lengthening of the terminal branches of the brachial plexus suffered after RSA implantation. MATERIALS AND METHODS: 20 Embalmed cadavers were analysed. Four distances using bone references were employed to measure the lengthening of the arm and subacromial space. The brachial plexus and its terminal branches (radial, axillary, ulnar, musculocutaneous and median nerves) and the axillary artery, were identified and marked. Measurements were made to determine the change of position of the neurovascular structures, the arm lengthening and the lengthening of each nerve before and after the implantation of RSA. Two models of RSA were used: SMR®(Lima) and Delta Xtend®(DePuy-Synthes). RESULTS: The mean arm elongation was 10.5 mm. The subacromial space suffers an elongation of 20.5-29.8%. All the neurovascular structures suffered elongation: median nerve 23.1%, musculocutaneous nerve 22.1%, ulnar nerve 19%, radial nerve 17%, axillary nerve 12-14.5%, axillary artery 24.8%. There were no differences in the results between the types of prosthesis. CONCLUSIONS: Due to its design, the RSA causes an arm lengthening which is reflected by the elongation of the neurovascular structures of the arm.

Reverse shoulder arthroplasty for proximal humeral fracture in the elderly. Cemented or uncemented stem?

OBJECTIVE: The purposes of this study were to compare functional outcomes, radiographic stem changes and complication rate in patients with proximal humeral fractures operated with cemented or uncemented RSA. METHODS: Retrospective review of 68 primary RSAs in PHF, 45 cemented/23 uncemented. Functional outcomes were evaluated according to constant, ASES scales and the range of motion (ROM). Radiographic assessment was performed at a minimum of two years post-operatively. RESULTS: The mean follow-up cemented/uncemented was 37.8/26.5 months (p = .04) and the mean age 78/80 years old (p = .09). The functional outcome and range of movement were equivalent in the two groups except for the forward flexion that was significantly higher in the cemented group (p = .03). Stress shielding was seen in 30.4% of uncemented group and none in the cemented. Anatomic tuberosity healing was significantly higher with uncemented components compared with cemented components (64% vs 91%, p = .02). Cemented stems had radiolucent lines with a width of 2 mm or more in three or more Gruen zones in 9% vs 0% in the uncemented group and an evident change in the stem position was present in 4% vs 0% in the non-cemented group. CONCLUSION: At mid-term follow-up, no differences in functional outcomes were detected depending on the stem fixation technique. Cemented stems, however, have a complication rate (including stem loosening) significantly higher than press-fit stems.

Acute Carpal Tunnel Syndrome After Radial Artery Cannulation: A Case Report.

CASE: A 20-year-old postpartum woman developed paresthesias and intolerable pain over the volar aspect of the first through fourth fingers, after radial artery cannulation (RAC) during cesarean section. Ultrasonography did not show any hematoma in the forearm. Urgent carpal tunnel release and median nerve decompression were performed, resulting in complete disappearance of symptoms. CONCLUSION: Acute median nerve compression is a rare injury in its own, but it is even rarer as a complication of RAC. Urgent decompression should be performed as soon as possible to avoid future neurological deficits.

Suspected Brown Recluse Spider Envenomation: Missed Diagnosis and Delayed Treatment of Loxoscelism: A Case Report.

CASE: We report the case of a previously healthy 51-year-old man who presented to our hospital after worsening clinical appearance of his left ring finger, despite antibiotics and previous surgical drainage for suspected abscess at an outside institution 3 weeks ago. He was admitted to our hospital for surgical debridement and decompression. After suspicion of cutaneous loxoscelism based on the clinical record and corticosteroid administration, the patient presented a favorable evolution. CONCLUSION: Cutaneous loxoscelism caused by a spider bite is present in Europe, mainly in the Mediterranean area, and should be considered in cases of skin infections which do not respond to antibiotics.

Dislocation after reverse total shoulder arthroplasty using contemporary medialized modular systems. Can we still consider it such a frequent complication?

INTRODUCTION: Improvement in reverse total shoulder arthroplasty (RTSA) prosthesis and technique has reduced the initially high complication and revision rates associated with this implant. However, instability continues to be a leading cause of reoperation after RTSA, being related in previous studies with medialized designs. The aim of this study was to determine the dislocation rate with the employment of two medialized modular systems of RTSA in our institution. MATERIALS AND METHODS: A retrospective review of two different modular systems of RTSA (SMR Modular Shoulder System and Delta XTEND Reverse Shoulder) was performed between 2009 and 2017 with a minimum 3-year follow-up. Baseline demographic, clinical (Constant, ASES and ROM), and radiographic data were collected. Characteristics of postoperative instability cases were also evaluated. RESULTS: 237 primary RTSA (41% SMR/59% Delta) and 34 revision RTSA (44% SMR/56% Delta) with a mean follow-up of 75.6 ± 5.2 months (79.2 SMR/86.3 Delta, p = .586) were included in the present study. Indications for primary RTSA were osteoarthritis, rotator cuff tear arthropathy and massive irreparable rotator cuff tear (64%), acute fracture (32%), and fracture sequelae (4%). Subscapularis tendon was always repaired in degenerative pathology and tuberosities reattached in traumatic cases. The mean age of the global series was 76.5 ± 5.3 years (75.8 SMR/78.6 Delta, p = .104) with a mean Constant/ASES score at final follow-up of 68.5 ± 4.3/72.9 ± 20.3 (71/68 SMR and 69/74 Delta, p = .653 and .642). Only 2 patients (one acute fracture and one fracture sequelae) suffered an early postoperative anterior dislocation (before 3 months) which represents a rate of .84% in primary cases and .73% including revision surgery. Closed reduction manoeuvres were not successful, and both patients required revision surgery. At the end follow-up, both were stable and had no further dislocations. CONCLUSION: The dislocation rate after RTSA with the employment of two contemporary modular systems with a medialized centre of rotation is extremely low, especially when compared with the previously published series with the original Grammont design. Acute fracture and fracture sequelae were the main diagnoses associated with this instability. The reasons for the low dislocation rate are multifactorial, but the improvement in the baseplate position according to the more recent standards of "ideal position" and technical aspects such as subscapularis repair or tuberosity reattachment in fractures probably play an important role in this aspect.

Complications after open Latarjet procedure: influence of arm positioning on musculocutaneous and axillary nerve function.

BACKGROUND: Alterations in the anatomical relationships of the musculocutaneous (MCN) and axillary nerves and the influence of arm positioning on these relationships after a Latarjet procedure have been demonstrated in the cadaver, but there are no studies in the literature that establish if there is any neurophysiological repercussion. METHODS: We retrospectively identified 24 patients with a primary or revision open Latarjet procedure. A prospective clinical (Constant-Murley, Rowe and Walch-Duplay and active range of motion), radiographic (with CT), and electrodiagnostic evaluation was made at the most recent follow-up. RESULTS: Nonunion occurred in four patients (22%); there were, as well, one case of partial coracoid reabsorption (5%) and two (11%) with mild glenohumeral osteoarthritis. In the anatomical position, we found no alterations in the musculocutaneous nerve and two cases (11%) in the axillary nerve slight motor unit loss. In the risk position, 11 cases (61%) had neurophysiological involvement (36% had neurophysiological changes in the musculocutaneous nerve and 64% in the axillary nerve). No differences between patients with or without neurophysiologic changes were found: Constant 87/83; Rowe 89/90; Walch-Duplay 84/78; Forward elevation 175º/170º, abduction 165°/175°; external rotation 48°/45°. CONCLUSION: The rate of clinical electromyographic changes in the axillary and MCN in the abducted and externally rotated arm position (risk dislocation position) is higher than in neutral position. Nonunion of the coracoid process must play a role in these neurophysiological changes. Although in the medium-term they don't have clinical impact, further randomized prospective studies with a larger sample size are necessary to determine their true repercussion. LEVEL OF EVIDENCE: Level IV.

Cerclage wire fixation of trochanteric osteotomies in complex hip revision: our experience and comparison with cable-plate fixation.

INTRODUCTION: Osteotomy of the greater trochanter is a commonly used procedure in complex revision hip arthroplasty in order to achieve a wide exposure to the femoral stem and acetabular components. There is no clinical evidence in favour of a specific fixation method. The aim of this study was to compare cable-plate with figure-of-eight cerclage wire fixation in patients requiring a trochanteric "slide" osteotomy. MATERIAL AND METHODS: In a retrospective study, 51 greater trochanteric "slide" osteotomies in complex acetabular revision arthroplasties were included. Patients were divided into 2 groups: 28 hips were fixed with 1 of 2 cable-plate systems (Dall-Miles staple, Stryker or Cable-Ready plate, Zimmer) and 23 with a figure-of-eight cerclage wire.Consolidation, osteolysis, migration of greater trochanter, bursitis of the trochanteric area, Trendelenburg gait and removal of osteosynthesis material were studied at 6 months follow-up. RESULTS: Both groups showed good union rates. The lysis rate was similar with 32% in the cable-plate group versus 29% in the cerclage wire group (p = 0.084). 43% of the hips with cable-plate and 22% of the cerclage wire had trochanteric migration (p = 0.297). Pain at the greater trochanter was less frequent in the cerclage wire group (9%) as compared to the cable-plate group (43%) (p = 0.007). Implant removal was more frequent in the cable-plate group (4 vs. 0 patients). Trendelenburg gait was found in 3 patients in the cerclage wire group as compared to 10 in the cable-plate group (p = 0.054). CONCLUSIONS: The cerclage wiring had superior clinical outcomes with similar radiographic results. The authors recommend the use of figure-of-eight cerclage wire when fixing a greater trochanteric "slide" osteotomy in complex revision hip arthroplasty.

Nailing unstable pertrochanteric fractures: does size matters?

INTRODUCTION AND OBJECTIVES: New generation cephalomedullary nails are, currently, widely used for the treatment of trochanteric proximal femoral fractures. This study aims to compare the midterm outcomes and complication rates in patients with unstable 31A2 fractures treated with two different lengths of nails. MATERIALS AND METHODS: Retrospective study including 123 pertrochanteric proximal femoral fractures 31A2 treated with Gamma3 nail® between January/2017 and January/2019. 19 patients were excluded, resulting in a total of 104 patients with a minimum follow-up of 1 year. Two groups, Long Dynamic Gamma3 Nail (LGN) and Short Static Gamma3 Nail (SGN), with 52 patients each were compared. Mean age was 81 years (range 50-99), being 78% female. Preoperative variables included: age, medical comorbidities, mobility, anesthetic risk, associated fractures, hemoglobin and hematocrit values. Postoperatively, functional and radiological results, quality of life, hemoglobin and hematocrit concentration, transfusion requirements, mobility, and pain were evaluated. Additionally, perioperative complications were also analyzed, such as malunion, non-union, infection rates, cut-outs, and peri-implant fractures. RESULTS: A correct radiological fracture reduction was obtained in 73% of the cases (73% SGN/74% LGN). Two patients in LGN group had intraoperative complications (greater trochanter fractures). 38% of the patients with LGN presented nail tip impaction upon the distal anterior femoral cortex, associated with anterior knee pain. Blood loss and operative time was statistically different between groups. Despite the previous, no differences in clinical outcomes and quality of life were found. CONCLUSIONS: The present study comparing two lengths of the Gamma3 Nail in 31A2 fractures showed no overall differences in clinical and radiological outcomes, and complication rates. However, the use of LGN was associated with a statistically significant higher blood loss and operative time, and a tendency for increased need for transfusion, and anterior knee pain and reoperation rate. Therefore, we recommend the use of locked SGN in the treatment of 31A2 fractures.