Outcomes of cable fixation after Vancouver type B1 periprosthetic femoral fractures.

BACKGROUND: In this study, it was aimed to evaluate the patients who underwent cable plate fixation due to a Vancouver-type B1 periprosthetic femur fracture and their clinical results. METHODS: Vancouver-type B1 patients who were operated on for periprosthetic fractures between 2014 and 2019 were investi-gated. Age, gender, body mass index (BMI), follow-up time, operation time, bleeding amount, non-union fracture, last surgery before fracture, the time between previous surgery and fracture, implant survival, patient survival, and complications were recorded. In addi-tion, the postoperative clinical functions of these patients were compared. RESULTS: 23 patients who met the study criteria (Vancouver type B1 fracture) were identified. The mean age of the patients was 60 (49-76) years, the mean BMI was 26.3 (17.5-40.7), and the postoperative mean follow-up period was 14 (6-36) months. Considering the gender distribution, there were 5 (22%) men and 18 (78%) women. The mean time between the last surgery before the fracture and the fracture was 6 months (0-30). While the mean operation time was 95 min (60-180), the average amount of bleeding was 310 mL (150-600). Functional evaluations of patients: In total, five patients had decreased ambulatory abilities after surgery. Nonunion was observed in 2 patients during the follow-ups, and these patients underwent open surgery for treatment. CONCLUSION: Cable and locking plate applications are successful in Vancouver type B1 fractures, which are one of the most common forms of periprosthetic fractures. In this technique, the duration of the operation can be shortened under ideal conditions, and the need for blood and blood products is reduced as blood loss is reduced. If there is a complication, you still have the chance to treat it with the option of revision arthroplasty.

Outcome of mobile and fixed unicompartmental knee arthroplasty and risk factors for revision.

OBJECTIVES: In this study, we aimed to evaluate the outcomes of patients undergoing unilateral knee arthroplasty (UKA) and to analyze risk factors that may lead to revision in patients who undergo UKA. METHODS: We included patients who underwent mobile or fixed UKA owing to osteoarthritis and who had at least 24 months of follow-up in the postoperative period. We recorded information on patient age, sex, side, body mass (kg/m2), follow-up duration, Knee Society Score, Western Ontario and McMaster Universities Arthritis Index (WOMAC) pain, WOMAC function, WOMAC stiffness, mechanical axle angle, femoral component compliance, tibial component compliance, accumulated experience of the surgeon, and revision status. RESULTS: In total, we evaluated 131 knees in 118 patients. 50 (38%) who underwent mobile UKA and 81 (62%) who underwent fixed UKA. The effect of obesity on mobile and fixed UKA revision was significant. The likelihood of revision decreased with greater experience of the surgeon performing UKA. CONCLUSION: Our study showed that the clinical results of mobile and fixed UKA procedures are similar. We also revealed that obesity poses a risk for revision in both fixed and mobile UKA, and the revision rate decreases with increased experience of the surgeon.

Primary Soft Tissue Hydatid Cysts

Objective: Hydatid cyst disease is a helminthic infection caused by Echinococcus granulous, which is encountered with cysts in many organs, especially the liver and lungs. Soft tissue and intramuscular hydatid cyst are rare even in endemic countries. It is challengig to distinguish subcutaneous and intramuscular hydatid cysts from soft tissue tumors. This study aimed to present the clinical features of primary soft tissue hydatid cyst cases without liver and lung hydatid cyst in the Southeast Anatolian region, where hydatid cyst disease is endemic. Methods: Patients admitted to the Sanliurfa Training and Research Hospital General Surgery and Orthopedics and Traumatology Outpatient Clinic between September 2018 and December 2019 with complaints of pain and/or swelling under the skin and soft tissue were evaluated. After the examinations, the records of the patients who were operated on with a pre-diagnosis of hydatid cyst and whose histopathologic evaluation was reported as a hydatid cyst were reviewed retrospectively. Results: Eight patients were included in the study. The mean age of the patients was 39.75±14.80 years. Lesions were located in neck (12.5%), left thoracic posterior area (25%), gluteus (25%), thigh (12.5%), right upper quadrant of abdominal wall (12.5%), and under the right clavicle (12.5%). When imaging methods were examined, ultrasonography was performed in 7 patients (87.5%), chest computed tomography was performed in 1 patient (12.5%), and magnetic resonance imaging was performed in 2 patients (25%). Conclusion: Diagnosis of hydatid cyst should be considered in the differential diagnosis of soft tissue tumors in countries of endemic regions for hydatid cyst disease such as Southeastern Anatolia Region, Turkey.

Effect of bone morphogenic protein-2 and desferoxamine on distraction osteogenesis.

BACKGROUND: Angiogenesis is crucial for formation of a stable regenerate during distraction osteogenesis (DO). This experimental study evaluates if bone morphogenic protein-2 (BMP-2) and desferrioxamine (DFO), two agents which are known to induce neoangiogenesis in vivo, would increase angiogenesis and osteogenesis, and improve mechanical properties of bone regenerate in DO model. METHODS: Twenty-four tibias of 24 New Zealand rabbits were osteotomized and fixed with semi-circular fixators. Three groups of 8 animals were formed. BMP-2 soaked scaffolds were used in the first group, whereas daily local DFO injections were made in the second group. Subjects in the control group did not receive any agents during the surgery or in the distraction period. The rabbits in all three groups underwent distraction at a rate of 0.6 mm/day for 15 days following the 7-day latent period. Animals were sacrificed on day 38, and the tibia were harvested for histological and mechanical examination of the regenerate. RESULTS: All 24 rabbits survived the surgical procedure, and there were no side effects against the BMP-2 and local DFO. Three-point bending tests revealed a higher force (361 ± 267 N.) required for fracture in Group 1 (p: 0.018). Similarly, the bending moment in Group 1 (5.4 ± 4.0 Nmm) was significantly higher than the other groups (p: 0.021). There was no significant difference between the groups in terms of deflection and stiffness (p Ëƒ 0.05). Histologically, there was no statistical difference between the groups in terms of endochondral, periosteal, and intramembranous ossification and VEGF activity (p Ëƒ 0.05). CONCLUSION: BMP-2 and DFO stimulate angiogenesis by increasing VEGF activity. Angiogenesis is one of the most important mechanisms for the initiation and maintenance of new bone formation. Stimulation of angiogenesis in unfavorable biomechanical conditions may not be sufficient for ideal bone formation.

Treatment of locally aggressive benign bone tumors by means of extended intralesional curettage without chemical adjuvants.

Objectives: The aim of this study is to present the clinical, oncological, and functional results of locally aggressive benign bone tumors treated with extended intralesional curettage without the use of adjuvant in a tertiary orthopedic oncology center. Method: A total of 172 patients treated with surgical curettage and high-speed burrs for the diagnosis of aneurysmal bone cyst, giant cell tumor, osteoblastoma, chondroblastoma, and chondromyxoid fibroma were included in the study. Demographic, radiological, and clinical data of the patients were analyzed. Results: One-hundred seventy two patients (101 (59%) female and 71 (41%) male) with a mean age of 23 years (6-84). The mean follow-up period was 48 months (18-108). In the study, a total of 8 (4.6%) patients had postoperative complications, 17 (9.9%) patients had recurrence in the postoperative period. Diameter greater than 5 cm was found to be a risk factor for recurrence (p < 0.004). The probability of developing complications was found to be significantly higher in patients with recurrence (p < 0.001). There was no significant relationship between recurrence and age, tumor type, and tumor stage. Conclusion: Successful treatment results can be obtained with extended surgical curettage, high-speed burr, and cauterization without the use of chemical adjuvants in locally aggressive bone tumors.

Do Magnetically Controlled Growing Rods Stimulate Longitudinal Vertebral Growth in Early-Onset Scoliosis Patients?

OBJECTIVE: Distraction-based systems are the most common systems used in the treatment of early-onset scoliosis. In addition to its corrective and deformity progression preventive properties, its vertebral growth stimulation effect has been proved. Recently popularized magnetically controlled growing rods (MCGRs) showed superior results in terms of outcomes and decreased complication rate. Its vertebral growth stimulation effect has not been studied. The aim of the study is to evaluate the vertebral growth stimulation effect in patients treated with MCGR. METHODS: Patients with progressive scoliosis treated by dual MCGR, who had no obvious lumbar vertebral deformity and had a regular 3-month interval spinal lengthening for at least 30 months, were subdivided into 2 groups according to the inclusion of L3 vertebra within instrumentation segments. The L3 vertebral vertical and horizontal lengths were measured postoperatively and at the last follow-up, and their differences were analyzed statistically in both groups. RESULTS: Twenty-four patients were included; 18 of them had an L3 vertebra outside instrumentation segments, while the other 6 had spanned by MCGR. Uninstrumented L3 were followed up for an average of 36 months. The height difference between initial postoperative examination and the last follow-up was 3.55 mm ± 0.63 mm, and the width difference was 3.85 mm ± 0.75 mm. Conversely, patients with instrumented L3 were followed up for a mean of 38.9 months. Their initial postoperative examination and last follow-up differences in height and width were 6.91 mm ± 1.11 mm and 3.66 mm ± 0.92 mm, respectively. CONCLUSIONS: Frequent distractions stimulate longitudinal vertebral growth in vertebrae spanned by MCGR.

A retrospective analysis of risk factors for clavicle fractures in newborns with shoulder dystocia and brachial plexus injury: A single-center experience.

OBJECTIVE: We aimed to analyze the risk factors for clavicle fractures in newborns with shoulder dystocia and brachial plexus injury and to determine whether their incidence is associated with local characteristics. METHODS: This study was conducted as a retrospective trial between January 2017 and December 2018. Patients with clavicular fracture who were hospitalized in the neonatal intensive care unit of a community hospital were retrospectively analyzed. The clavicular fracture cohort was first divided into two groups and then two subgroups: patients with/without shoulder dystocia and patients with/without a brachial plexus injury. Peripartum and neonatal risk factors of these patients were reviewed using the patient information system. Any additional neurological or musculoskeletal trauma was noted. A multivariate logistic regression analysis was performed to determine independent predictors of shoulder dystocia and brachial plexus injury. RESULTS: A total of 46 patients with shoulder dystocia in 25 (54%) and brachial plexus injury in 12 (26%) were included in the study. The birth weight of patients with shoulder dystocia was 4,164.2±412.7 g, and that of patients without was 3,535.8±865.2 g (p=0.003). In 11 of 14 patients (44%) in whom labor was induced and whose infant had a fractured clavicle, the infant also had shoulder dystocia (p=0.029). Brachial plexus injury was found in 8 (66.7%) of 14 infants who were born by induced labor and who had a clavicular fracture (p=0.002). The regression analysis revealed that age and induction of labor were independent risk factors for brachial plexus injury (odds ratio=1.599 and 81.862, respectively). Gestational weight gain (p=0.003) and neonatal birth weight (p=0.047) were also found as independent risk factors for shoulder dystocia. CONCLUSION: Evidence from this study has shown that not only birth age or birth weight but also excessive weight gain by mother and induction of labor may increase the risk of clavicula fracture with brachial plexus palsy. Advanced maternal age, multiparity, and deliveries after 39 weeks seem to be risk factors for a clavicular fracture with a brachial plexus injury. LEVEL OF EVIDENCE: Level IV, Therapeutic study.

Spinal osteotomies: indications, limits and pitfalls.

The aims of spinal deformity surgery are to achieve balance, relieve pain and prevent recurrence or worsening of the deformity.The main types of osteotomies are the Smith-Petersen osteotomy (SPO), pedicle subtraction osteotomy (PSO), bone-disc-bone osteotomy (BDBO) and vertebral column resection (VCR), in order of increasing complexity.SPO is a posterior column osteotomy in which the posterior ligaments and the facet joints are removed and correction is performed through the disc space. A mobile anterior disc is essential. SPO is best in patients with +6-8 cm C7 plumbline. The amount of correction is 9.3° to 10.7°/level (1°/mm bone).PSO is a technique where the posterior elements and pedicles are removed. Then a triangular wedge through the pedicles is removed and the posterior spine is shortened using the anterior cortex as a hinge. The ideal candidates are patients with a severe sagittal imbalance. A single level osteotomy can produce 30° 40° of correction. A single level osteotomy may restore global sagittal balance by an average of 9 cm with an upper limit of 19 cm.BDBO is an osteotomy done above and below a disc level. A BDBO provides correction rates in the range of 35° to 60°. The main indications are deformities with the disc space as the apex and severe sagittal plane deformities.VCR is indicated for rigid multi-planar deformities, sharp angulated deformities, hemivertebra resections, resectable spinal tumours, post-traumatic deformities and spondyloptosis. The main indication for a VCR is fixed coronal plane deformity.The type of osteotomy must be chosen mainly according to the aetiology, type and apex of the deformity. One may start with SPOs and may gradually advance to complex osteotomies. Cite this article: EFORT Open Rev 2017;2:73-82. DOI: 10.1302/2058-5241.2.160069.