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https://www.readbyqxmd.com/read/28742786/proper-distal-placement-of-tibial-nail-improves-rate-of-malalignment-for-distal-tibia-fractures
#1
Konstantinos Triantafillou, Eric Barcak, Arturo Villarreal, Cory Collinge, Edward Perez
OBJECTIVES: We hypothesize that the anatomic center of the distal tibia is just lateral and anterior to the center of the distal tibia articular surface in the coronal and sagittal planes respectively, and that placement of the nail along this axis results in improved rates of malalignment when treating distal tibia fractures. DESIGN: Retrospective study SETTING:: One level I and one level II trauma center PATIENTS/PARTICIPANTS:: 203 distal tibia fractures treated with IMN (primary cohort) whose main fracture line extended within 5 cm of the plafond to evaluate the rate of malalignment with distal nail placement...
July 24, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28738005/accuracy-and-repeatability-of-long-bone-replicas-of-small-animals-fabricated-by-use-of-low-end-and-high-end-commercial-three-dimensional-printers
#2
Jamie A Cone, Thomas M Martin, Denis J Marcellin-Little, Ola L A Harrysson, Emily H Griffith
OBJECTIVE To assess the repeatability and accuracy of polymer replicas of small, medium, and large long bones of small animals fabricated by use of 2 low-end and 2 high-end 3-D printers. SAMPLE Polymer replicas of a cat femur, dog radius, and dog tibia were fabricated in triplicate by use of each of four 3-D printing methods. PROCEDURES 3-D renderings of the 3 bones reconstructed from CT images were prepared, and length, width of the proximal aspect, and width of the distal aspect of each CT image were measured in triplicate...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28736122/treatment-of-tibial-nonunion-with-posterolateral-bone-grafting
#3
Michael J Foster, Robert V O'Toole, Theodore T Manson
OBJECTIVES: Posterolateral bone grafting to treat nonunions of the distal two-thirds of the tibia avoids the often traumatized and more tenuous anterior soft-tissue envelope. Few modern reports of its effectiveness are available. We assessed whether posterolateral bone grafting leads to high union and low complication rates. METHODS: We conducted a retrospective review at a Level I trauma center. Our study group was 59 patients with distal two-thirds tibial fractures treated with posterolateral bone grafting...
May 3, 2017: Injury
https://www.readbyqxmd.com/read/28725124/reconstruction-of-the-distal-tibia-following-resection-of-aggressive-bone-tumours-using-a-custom-made-megaprosthesis
#4
P Yang, S Evans, Z Khan, A Abudu, L Jeys, R Grimer
OBJECTIVE: Largest, single-centre study of clinical and functional outcomes of patients who underwent endoprosthetic replacement (EPR) for aggressive distal tibial bone tumours. METHOD: Retrospective observational study of eight patients was undertaken. RESULTS: Median follow-up was 77 months (range 13-276). Cumulative five and ten year survival was 63% and 42% respectively. Three patients developed either disease recurrence or metastases post-surgery...
September 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28722691/structural-basis-of-bone-fragility-in-young-subjects-with-inflammatory-bowel-disease-a-high-resolution-pqct-study-of-the-swiss-ibd-cohort-sibdc
#5
Jessica Pepe, Sophie Zawadynski, Francois R Herrmann, Pascal Juillerat, Pierre Michetti, Sylvie Ferrari-Lacraz, Dominique Belli, Osman Ratib, René Rizzoli, Thierry Chevalley, Serge L Ferrari
BACKGROUND: The onset of inflammatory bowel disease (IBD) during childhood/adolescence compromises peak bone mass acquisition and predisposes to fractures later in life. However, the structural basis for bone fragility in young adults with IBD remains unknown. METHODS: One hundred two young subjects from the Swiss IBD cohort were included. Areal bone mineral density (aBMD) at distal radius, hip, and spine as well as morphometric vertebral fractures were assessed using dual-energy x-ray absorptiometry technique...
August 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28722129/bone-strength-estimated-by-micro-finite-element-analysis-%C3%A2%C2%B5fea-is-heritable-and-shares-genetic-predisposition-with-areal-bmd-the-framingham-study
#6
David Karasik, Serkalem Demissie, Darlene Lu, Kerry E Broe, Steven K Boyd, Ching-Ti Liu, Yi-Hsiang Hsu, Mary L Bouxsein, Douglas P Kiel
Genetic factors contribute to the risk of bone fractures, partly because of effects on bone strength. High-resolution peripheral quantitative computed tomography (HR-pQCT) estimates bone strength using micro-finite element analysis (µFEA). The goal of this study was to investigate if the bone failure load estimated by HR-pQCT-based µFEA is heritable and to what extent it shares genetic regulation with areal bone mineral density (aBMD). Bone microarchitecture was measured by HR-pQCT at the ultradistal tibia and ultradistal radius in adults from the Framingham Heart Study (n = 1087, mean age 72 years; 57% women)...
July 19, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28721473/biomechanics-of-the-classic-metaphyseal-lesion-finite-element-analysis
#7
Andy Tsai, Brittany Coats, Paul K Kleinman
BACKGROUND: The classic metaphyseal lesion (CML) is strongly associated with infant abuse, but the biomechanics responsible for this injury have not been rigorously studied. Radiologic and CT-pathological correlates show that the distal tibial CML always involves the cortex near the subperiosteal bone collar, with variable extension of the fracture into the medullary cavity. Therefore, it is reasonable to assume that the primary site of bone failure is cortical, rather than intramedullary...
July 18, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28712877/bone-mass-microarchitecture-and-strength-are-influenced-by-race-ethnicity-in-young-adult-men-and-women
#8
Kristin L Popp, Julie M Hughes, Adriana Martinez-Betancourt, Matthew Scott, Victoria Turkington, Signe Caksa, Katelyn I Guerriere, Kathryn E Ackerman, Chun Xu, Ginu Unnikrishnan, Jaques Reifman, Mary L Bouxsein
Lower rates of fracture in both Blacks compared to Whites, and men compared to women are not completely explained by differences in bone mineral density (BMD). Prior evidence suggests that more favorable cortical bone microarchitecture may contribute to reduced fracture rates in older Black compared to White women, however it is not known whether these differences are established in young adulthood or develop during aging. Moreover, prior studies using high-resolution pQCT (HR-pQCT) have reported outcomes from a fixed-scan location, which may confound sex- and race/ethnicity-related differences in bone structure...
July 13, 2017: Bone
https://www.readbyqxmd.com/read/28710506/obese-versus-normal-weight-late-adolescent-females-have-inferior-trabecular-bone-microarchitecture-a-pilot-case-control-study
#9
Joseph M Kindler, Norman K Pollock, Hannah L Ross, Christopher M Modlesky, Harshvardhan Singh, Emma M Laing, Richard D Lewis
Though still a topic of debate, the position that skeletal health is compromised with obesity has received support in the pediatric and adult literature. The limited data relating specifically to trabecular bone microarchitecture, however, have been relatively inconsistent. The aim of this pilot cross-sectional case-control study was to compare trabecular bone microarchitecture between obese (OB) and normal-weight (NW) late-adolescent females. A secondary aim was to compare diaphyseal cortical bone outcomes between these two groups...
July 14, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28708778/radiographic-investigation-of-the-distal-extension-of-fractures-into-the-articular-surface-of-the-tibia-the-ridefast-study
#10
Lucas S Marchand, Ajinkya A Rane, Zachary M Working, Lance G Jacobson, Erik N Kubiak, Thomas F Higgins, David L Rothberg
OBJECTIVE: To determine whether radiographic measurements are predictive of involvement of the distal tibia articular surface in tibial shaft fractures. DESIGN: Retrospective review. SETTING: Academic level-I trauma hospital. PATIENTS: Two-hundred seventeen patients with tibial shaft fractures distal to the isthmus (AO/OTA: 42-A1-3;42-B1-3;42-C1-3;43-A1-3). INTERVENTION: Analysis of AP and lateral radiographs...
June 22, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28706848/bipolar-bone-loss-of-the-shoulder-joint-due-to-recurrent-instability-use-of-fresh-osteochondral-distal-tibia-and-humeral-head-allografts
#11
Daniel B Haber, Anthony Sanchez, George Sanchez, Marcio B Ferrari, Sami Ferdousian, Matthew T Provencher
With increasing shoulder instability events, the likelihood of a bony lesion of the glenoid and/or humeral head rises. Although bone loss of either the glenoid or humeral head may result in recurrent instability, bipolar lesions have been shown, in particular, to result in a negative and additive effect on glenohumeral stability. In the case of a bipolar lesion comprising severe glenoid bone loss and an engaging, "off-track" Hill-Sachs lesion, the bony foundation of the glenohumeral joint is compromised and bony augmentation is necessary...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706808/transosseous-posterior-meniscal-root-reinsertion-using-knotless-anchor-for-tibial-fixation
#12
Alejandro Espejo-Baena, Alejandro Espejo-Reina, María Josefa Espejo-Reina, María Belén Martín-Castilla, Jaime Dalla-Rosa Nogales, Enrique Sevillano-Pérez
A technique for posterior meniscal root reinsertion is presented. With the arthroscope in the central transtendinous portal for a better view, a 5-mm transtibial tunnel is created with the aid of an anterior cruciate ligament guide open to 45°. A suture device, which consists of a long needle with an eyelet on its tip, is introduced through the tunnel with a suture thread inserted through the eyelet, while the meniscus is stabilized with a grasper inserted through the anterior portal. The meniscus is pierced with the device, and the suture thread is recovered with said grasper...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28697075/posterolateral-bone-grafting-for-distal-tibia-nonunion
#13
Sanjit Konda, Hesham Saleh, Nina Fisher, Kenneth A Egol
INTRODUCTION: This video demonstrates the technique of posterolateral bone grafting with iliac crest bone graft for a distal tibial nonunion. METHODS: The patient is a 42-year-old man who is 6 months status post an open distal tibia-fibula fracture treated surgically, and presents complaints of persistent right ankle pain. The fracture site was tender to palpation, and 3 consecutive plain radiographs spaced 6 weeks apart demonstrated no evidence of callus formation...
August 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28694162/impaired-bone-strength-estimates-at-the-distal-tibia-and-its-determinants-in-adolescents-with-anorexia-nervosa
#14
Vibha Singhal, Shreya S Tulsiani, Karen Joanie Campoverde, Deborah M Mitchell, Meghan Slattery, Melanie Schorr, Karen K Miller, Miriam A Bredella, Madhusmita Misra, Anne Klibanski
BACKGROUND: Altered bone microarchitecture and higher marrow adipose tissue (MAT) may reduce bone strength. High resolution pQCT (HRpQCT) allows assessment of volumetric BMD (vBMD), and size and microarchitecture parameters of bone, while 1H-magnetic resonance spectroscopy (1H-MRS) allows MAT evaluation. We have reported impaired microarchitecture at the non-weight bearing radius in adolescents with anorexia nervosa (AN) and that these changes may precede aBMD deficits. Data are lacking regarding effects of AN on microarchitecture and strength at the weight-bearing tibia in adolescents and young adults, and the impact of changes in microarchitecture and MAT on strength estimates...
July 7, 2017: Bone
https://www.readbyqxmd.com/read/28688811/angular-deformity-correction-by-guided-growth-in-growing-children-eight-plate-versus-3-5-mm-reconstruction-plate
#15
Kyeong-Hyeon Park, Chang-Wug Oh, Joon-Woo Kim, Il-Hyung Park, Hee-June Kim, Young-Seo Choi
BACKGROUND: Guided growth using the eight-plate (8-plate) is the most commonly used method to correct angular deformities in children; however, implant failure has been reported. Recently, the 3.5-mm reconstruction plate (R-plate) has been used as an alternative option for guided growth; however, hardware prominence has been problematic. This study aimed to compare the coronal angular deformity correction results of guided growth between relatively thin 8-plates with cannulated screws and thick R-plates with solid screws...
July 6, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28683418/tibial-impact-accelerations-in-gait-of-primary-school-children-the-effect-of-age-and-speed
#16
Oren Tirosh, Guy Orland, Alon Eliakim, Dan Nemet, Nili Steinberg
Tibial stress fractures are associated with increased lower extremity loading at initial foot-ground contact, reflected in high peak positive acceleration (>8g) of the tibia in adults. There is no reported data on peak positive acceleration of the tibia in children during walking and running. The aim of this study was to establish tibial peak positive acceleration responses in children across a range of age and gait speeds. Twenty-four children aged 8.5±1.4years with no known gait pathology comprised two age groups; Young (7-9year, n=12) and Older (10-12 years, n=12)...
June 27, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28678124/an-in-vivo-simulation-of-isometry-of-the-anterolateral-aspect-of-the-healthy-knee
#17
Willem A Kernkamp, Samuel K Van de Velde, Tsung-Yuan Tsai, Ewoud R A van Arkel, Peter D Asnis, Rob G H H Nelissen, Robert F LaPrade, Bertram Zarins, Guoan Li
BACKGROUND: To assess the isometry of theoretical lateral extra-articular reconstruction (LER), we evaluated theoretical grafts attached to various points on the lateral femoral condylar area and to either Gerdy's tubercle or the anatomic attachment site of the anterolateral ligament to the tibia. METHODS: In 18 subjects, healthy knees with no history of either injury or surgery involving the lower extremity were studied. The subjects performed a sit-to-stand motion (from approximately 90° of flexion to full extension), and each knee was studied using magnetic resonance and dual fluoroscopic imaging techniques...
July 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28677074/the-measurement-of-medial-knee-gap-width-using-ultrasound
#18
Laura C Slane, Josh A Slane, Lennart Scheys
INTRODUCTION: Medial knee instability is a key clinical parameter for assessing ligament injury and arthroplasty success, but current methods for measuring stability are typically either qualitative or involve ionizing radiation. The purpose of this study was to perform a preliminary analysis of whether ultrasound (US) could be used as an alternate approach for quantifying medial instability by comparing an US method with an approach mimicking the current gold standard fluoroscopy method...
August 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28677057/forensic-age-estimation-by-magnetic-resonance-imaging-of-the-knee-the-definite-relevance-in-bony-fusion-of-the-distal-femoral-and-the-proximal-tibial-epiphyses-using-closest-to-bone-t1-tse-sequence
#19
Christian Ottow, Ronald Schulz, Heidi Pfeiffer, Walter Heindel, Andreas Schmeling, Volker Vieth
OBJECTIVES: To clarify the relevance of the bony fusion of the distal femoral and the proximal tibial epiphyses by means of magnetic resonance imaging (MRI), a prospective cross-sectional cohort study was performed with a special focus on a reliable determination of the 14th, 16th and 18th years of life. METHODS: We scanned 658 German volunteers in the age bracket 12-24 years using a 3.0 T MR-scanner and utilising a T1 turbo spin-echo sequence representing true bone anatomy...
July 4, 2017: European Radiology
https://www.readbyqxmd.com/read/28675940/influence-of-geometry-and-depth-of-resections-on-bone-support-for-total-ankle-replacement
#20
Jeffrey E Bischoff, Lew Schon, Charles Saltzman
BACKGROUND: Aseptic component loosening is a leading cause of revision for total ankle replacement. Different operative approaches for resecting the tibia and talus impact the bony support for the prostheses due to variations in both bone density and resection area, and may therefore impact loosening performance. METHODS: Computed tomography data from 116 subjects were obtained, and solid models of the talus and tibia were generated. Bone density, resection area, and bony support were measured on a series of flat resections for each subject, at multiple resection depths...
July 1, 2017: Foot & Ankle International
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