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https://www.readbyqxmd.com/read/29150315/surgical-options-for-osteoporotic-vertebral-compression-fractures-complicated-with-spinal-deformity-and-neurologic-deficit
#1
Kalliopi Alpantaki, Michael Dohm, Panagiotis Korovessis, Alexander G Hadjipavlou
INTRODUCTION: This paper describes surgical options for Osteoporotic vertebral compression fracture (OVCF) with acute flexible or chronic rigid kyphosis, and pseudarthrosis complicated with pain and neurologic deficit. METHODS: This study has two components. a) A prospective clinical study of surgical treatment of 31 patients (age: 69±11 years) with either acute flexible or progressive pseudarthrotic kyphosis manifested with severe pain or neurological deficit between 2010 and 2014...
November 12, 2017: Injury
https://www.readbyqxmd.com/read/29149846/the-impact-of-bone-morphology-on-the-outcome-of-the-pivot-shift-test-a-cohort-study
#2
Thomas Branch, Shaun Stinton, Adrija Sharma, Frederic Lavoie, Christian Guier, Philippe Neyret
BACKGROUND: The presence of a positive pivot shift after surgical repair of the ACL is considered an important indicator of a failed reconstruction. The ability to predict the result of a pivot shift test after an ACL reconstruction using variables that can be measured prior to surgery could provide an indication of which patients may be at-risk of a poor surgical outcome.The purpose of this study was to determine whether structural characteristics of the femur and tibia, measured using plain radiographs, were associated with the result of the pivot shift test in unilateral ACL reconstructed patients...
November 17, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29149388/problems-of-reconstructive-cranioplasty-after-traumatic-brain-injury-in-children
#3
Paolo Frassanito, Gianpiero Tamburrini, Luca Massimi, Simone Peraio, Massimo Caldarelli, Concezio Di Rocco
Cranial repair after traumatic brain injury in children is still burdened by unsolved problems and controversial issues, mainly due to the high rate of resorption of autologous bone as well as the absence of valid alternative material to replace the autologous bone. Indeed, inert biomaterials are associated to satisfactory results in the short period but bear the continuous risk of complications related to the lack of osteointegration capacity. Biomimetic materials claiming osteoconductive properties that could balance their mechanical limits seem to allow good cranial bone reconstruction...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29149260/an-aorto-oesophageal-fistula-caused-by-a-fish-bone-resulting-in-an-accidental-discovery-of-an-invasive-adenocarcinoma-in-the-lung
#4
Bao Long Zhang, Ji Ning Sun, Na Na Liu, Fu Zhi Cao
An aorto-oesophageal fistula is a rare, life-threatening complication caused by sharp foreign bodies in the oesophagus. We report an aorto-oesophageal fistula in the inferior segment of thoracic oesophagus caused by a fish bone. Multiplanar reconstruction of computed tomography and computed tomography angiography demonstrated that a foreign body had pierced from the left posterior wall of the oesophagus into the descending aortic wall. These computed tomography images can help radiologists make the correct diagnosis and provide precise evidence for clinicians to perform a timely surgical intervention...
November 15, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29147489/the-effect-of-platelet-rich-plasma-on-human-mesenchymal-stem-cell-induced-bone-regeneration-of-canine-alveolar-defects-with-calcium-phosphate-based-scaffolds
#5
Reihaneh Shafieian, Maryam Moghaddam Matin, Amin Rahpeyma, Alireza Fazel, Hamideh Salari Sedigh, Ariane Sadr-Nabavi, Halimeh Hassanzadeh, Alireza Ebrahimzadeh-Bideskan
Objectives: Autologous bone transplantation known as the "gold standard" to reconstruction of osseous defects has known disadvantages. This study was designed to explore the effects of hydroxy-apatite/tricalcium-phosphate (HA/TCP) and platelet-rich plasma (PRP) on the osteogenesis ability of human adipose-derived mesenchymal stem cells (hAdMSCs) in vitro and in vivo. Materials and Methods: hAdMSCs were incubated with HA/TCP granules and/or PRP in vitro and then, cell proliferation and differentiation was assessed by MTT assay, AZR S staining and SEM examination...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29146163/a-comparative-biomechanical-study-of-femoral-cortical-suspension-devices-for-soft-tissue-anterior-cruciate-ligament-reconstruction-adjustable-length-loop-versus-fixed-length-loop
#6
Moon Jong Chang, Tae Soo Bae, Young-Wan Moon, Jin Hwan Ahn, Joon Ho Wang
PURPOSE: To determine whether there are differences between adjustable-length loop and fixed-length loop devices in terms of the amount of displacement, temporal pattern of displacement, and ultimate failure load when tested using 4,500 cycles of sinusoidal loading with high loads (100-400 N). METHODS: Two cortical suspension devices with a fixed- or adjustable-length loop were tested. For our comparisons, a 20-mm fixed-length loop device and a fixed-length loop device with the same loop length were used...
November 13, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29145529/volumetric-bone-measurement-around-dental-implants-using-3d-image-superimposition-a-methodological-and-clinical-pilot-study
#7
Eduardo Aydos Villarinho, André Correia, Alvaro Vigo, Nuno Viriato Ramos, Mário Augusto Pires Vaz, Rosemary Sadami Arai Shinkai
PURPOSE: This study describes the development of a methodology for using three-dimensional (3D) image superimposition to measure volumetric changes in bone level around dental implants in comparison with linear measures. MATERIALS AND METHODS: The sample was comprised of 46 dental implants of 6-mm length and 4.1-mm diameter placed in the posterior maxilla and posterior mandible in 20 patients. All implants received screw-retained single crowns. Radiographic images were taken using cone beam computed tomography (CBCT) and digital periapical radiography after implantation and after 12 and 24 months of functional loading (after crown installation)...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145337/partial-resection-and-reconstruction-of-the-sternum-for-treatment-of-metachronous-sternal-metastasis-of-thyroid-carcinoma-a-case-report
#8
Hong-Jing Lan, Zhi-Qiang Wu, Dong-Ge Gong, Wang-Yong Zheng, Yun Jin
RATIONALE: Metachronous sternal metastasis of thyroid carcinoma was a rare disease. There was no consensus in the treatment for bone metastasis after the initial thyroid carcinoma surgery. PATIENT CONCERNS: A 53-year-old female patient was hospitalized due to recurrent dull chest pains, with a history of radical right side thyroid carcinoma 4 years ago. On examination, there was an irregular mass on the lower left half of the sternum. Computerized tomography scan showed sternal bone destruction with a soft tissue mass...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144991/finite-element-simulation-on-posterior-tibial-tendinopathy-load-transfer-alteration-and-implications-to-the-onset-of-pes-planus
#9
Duo Wai-Chi Wong, Yan Wang, Aaron Kam-Lun Leung, Ming Yang, Ming Zhang
BACKGROUND: Posterior tibial tendinopathy is a challenging foot condition resulting in pes planus, which is difficult to diagnose in the early stage. Prior to the deformity, abnormal internal load transfer and soft tissue attenuation are anticipated. The objective of this study was to investigate the internal load transfer and strain of the ligaments with posterior tibial tendinopathy, and the implications to pes planus and other deformities. METHODS: A three-dimensional finite element model of the foot and ankle was reconstructed from magnetic resonance images of a 28-year-old normal female...
November 3, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29144723/inorganic-strengthened-hydrogel-membrane-as-regenerative-periosteum
#10
Tianwen Xin, Yong Gu, Ruoyu Cheng, Jincheng Tang, Zhiyong Sun, Wenguo Cui, Liang Chen
Periosteum plays the pivotal role in neomineralization, vascularization and protection during bone tissue regeneration. However, many artificial periosteum focused only on protection and lacked of the osteogenesis and angiogenesis functional capacity. In this study, we developed a novelty inorganic strengthened gelatin hydrogel membrane via inorganic and organic co-cross-linked double network as artificial periosteum for enhancing the durable angiogenesis and osteogenesis in bone reconstruction. Mesoporous bioactive glass nanoparticles (MBGNs) chemically modified with photo-cross-linkable gelatin derivative (GelMA) were further incorporated into GelMA to fabricate an organic/inorganic co-cross-linked hydrogel membrane (GelMA-G-MBGNs)...
November 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29144022/collagen-a-review-on-its-sources-and-potential-cosmetic-applications
#11
REVIEW
María Isabela Avila Rodríguez, Laura G Rodríguez Barroso, Mirna Lorena Sánchez
Collagen is a fibrillar protein that conforms the conjunctive and connective tissues in the human body, essentially skin, joints, and bones. This molecule is one of the most abundant in many of the living organisms due to its connective role in biological structures. Due to its abundance, strength and its directly proportional relation with skin aging, collagen has gained great interest in the cosmetic industry. It has been established that the collagen fibers are damaged with the pass of time, losing thickness and strength which has been strongly related with skin aging phenomena [Colágeno para todo...
November 16, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29143065/-complex-joint-reconstruction-and-joint-transplantation-with-the-flocsat-concept-planning-and-surgical-implementation
#12
REVIEW
C Krettek, J-D Clausen, C Neunaber
Cartilage defects in adult patients are so far incurable. Fresh osteochondral allograft (OCA) transplantation is based on the insertion of mature, living, mechanically sound hyaline cartilage into an osteochondral defect where it undergoes osseointegration. Intact hyaline cartilage of OCA does not cause immune reactions in the recipient. Many reports show that small OCA have good osseointegration and show good long-term results. These observations have been incorporated into the development of the fresh large (> 10 cm(2)) osteochondral shell allograft transplantation (FLOCSAT) concept, which is based on the following principles: 1) the thickness of the osseous layer should be kept as thin as possible (target < 6-8 mm) so that the transplant remains stable and fixable...
November 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29141673/a-customized-fixation-plate-with-novel-structure-designed-by-topological-optimization-for-mandibular-angle-fracture-based-on-finite-element-analysis
#13
Yun-Feng Liu, Ying-Ying Fan, Xian-Feng Jiang, Dale A Baur
BACKGROUND: The purpose of this study was to design a customized fixation plate for mandibular angle fracture using topological optimization based on the biomechanical properties of the two conventional fixation systems, and compare the results of stress, strain and displacement distributions calculated by finite element analysis (FEA). METHODS: A three-dimensional (3D) virtual mandible was reconstructed from CT images with a mimic angle fracture and a 1 mm gap between two bone segments, and then a FEA model, including volume mesh with inhomogeneous bone material properties, three loading conditions and constraints (muscles and condyles), was created to design a customized plate using topological optimization method, then the shape of the plate was referenced from the stress concentrated area on an initial part created from thickened bone surface for optimal calculation, and then the plate was formulated as "V" pattern according to dimensions of standard mini-plate finally...
November 15, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29140580/enhanced-biological-fixation-of-ligaments-to-bone-tissues-utilizing-chitin-fabrics
#14
Hisaya Nomata, Michiko Nakaishi, Kazuo Takakuda
In ligament reconstruction involving anterior cruciate ligament surgery, biological fixation between the transferred ligament and bone tissue is critical for achieving successful outcomes. Here, we administered chitin fabrics into the bone tunnels and evaluated their efficacy in promoting biological fixation. An animal model on the rat's patellar ligament was employed. First, bone tunnels were created in the lateral condyle of the femur. The ligament was then separated from the tibial tuberosity, and half was inserted into the tunnel and fixed with the use of end button...
November 15, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29140567/human-adipose-derived-stromal-cell-isolation-methods-and-use-in-osteogenic-and-adipogenic-in-vivo-applications
#15
Elizabeth Brett, Ruth Tevlin, Adrian McArdle, Eun Young Seo, Charles K F Chan, Derrick C Wan, Michael T Longaker
Adipose tissue represents an abundant and easily accessible source of multipotent cells, which may serve as excellent building blocks for tissue engineering. This article presents a newly described protocol for isolating adipose-derived stromal cells (ASCs) from human lipoaspirate, compared to the standard protocol for harvesting ASCs established in 2001. Human ASC isolation is performed using two methods, and resultant cells are compared through cell yield, cell viability, cell proliferation and regenerative potential...
November 15, 2017: Current Protocols in Stem Cell Biology
https://www.readbyqxmd.com/read/29140389/influence-of-rhbmp-2-on-guided-bone-regeneration-for-placement-and-functional-loading-of-dental-implants-a-radiographic-and-histologic-study-in-dogs
#16
Heithem Ben Amara, Jung-Won Lee, Jung-Ju Kim, Yun-Mi Kang, Eun-Jung Kang, Ki-Tae Koo
PURPOSE: Evidence on the outcomes of functional loading placed in recombinant human bone morphogenetic protein 2 (rhBMP-2)/acellular collagen sponge (ACS)-induced bone is lacking. The aim of this study was to verify whether guided bone regeneration (GBR) with rhBMP-2/ACS enhances regeneration of missing bone and osseointegration of dental implants subject to functional loading. MATERIALS AND METHODS: Two bilateral standardized large saddle-type defects (≈10 × 10 × 6 mm) were surgically created in each mandible of seven beagle dogs 2 months after tooth extraction...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140387/full-mouth-rehabilitation-with-calvarium-bone-grafts-and-dental-implants-for-a-papillon-lef%C3%A3-vre-syndrome-patient-case-report
#17
Bassam M Kinaia, Kristyn Hope, Ahmed Zuhaili, Jean Francois Tulasne
Papillon-Lefèvre syndrome (PLS) is a rare autosomal recessive disorder of keratinization associated with palmoplantar keratoderma and severe periodontitis resulting in complete edentulism in late adolescence. The pathognomonic dental features of PLS are pathologic migration, hypermobility, and exfoliation of the teeth without any signs of root resorption. It has been suggested that an effective way to treat PLS patients presenting early in the disease progression is extraction of the erupted primary dentition or hopeless permanent teeth followed by antibiotic coverage with periodontal therapy for the remaining teeth...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140385/virtual-treatment-planning-for-implant-retained-nasal-prosthesis-a-clinical-report
#18
Muaiyed Mahmoud Buzayan, Norsiah Binti Yunu, Ha Kien Oon, Omar Tawfiq
Osseointegrated craniofacial implants have improved retention and patients' perceptions of implant-retained nasal prostheses; however, the determination of the available bone sites for implant placement post-rhinectomy is difficult. This case report describes the use of cone beam computed tomography scanning and computer-assisted virtual planning in conjunction with digital photographs for rehabilitation of a facial defect with an implant-retained silicon nasal prosthesis. Two implants were planned in the anatomical area with adequate bone volume to achieve favorable cosmetic outcomes and accessibility for hygiene maintenance...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29139147/the-development-of-lingual-glands-in-the-domestic-duck-anas-platyrhynchos-f-domestica-3d-reconstruction-lm-and-sem-study
#19
Kinga Skieresz-Szewczyk, Pieter Cornillie, Hanna Jackowiak
The major salivary glands of birds develop by branching or elongation of the epithelial cords. The development of the minor salivary glands in form of the lingual glands has never been described. Among birds, only Anatidae have three types of the lingual glands: rostral, caudo-lateral, and caudo-medial lingual glands. The study aims to characterize the manner and rate of the lingual glands development in the domestic duck and their topographical arrangement relative to the hyoid apparatus. The study reveals that all three types of the lingual glands develop by branching...
November 15, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29138919/low-re-rupture-rate-with-bptb-autograft-and-semitendinosus-gracilis-autograft-with-preserved-insertions-in-acl-reconstruction-surgery-in-sports-persons
#20
Ravi Gupta, Munish Sood, Anubhav Malhotra, Gladson David Masih, Anil Kapoor, Mukta Raghav, Mehar Dhillon
PURPOSE: To compare the results of bone-patellar tendon-bone graft (BPTB), semitendinosus-gracilis graft with preserved insertions (STGPI) and semitendinosus-gracilis-free graft (STGF) in terms of graft failure, objective mechanical stability, functional outcome, and return to sports in elite and recreational sports persons. It was hypothesized that the STGPI graft provided superior outcome as compared to the other two grafts. METHODS: Two hundred and forty-nine elite and recreational players who underwent ACL reconstruction surgery, with BPTB graft (N = 80), STGPI graft (N = 85), and STGF graft (N = 84) with a minimum follow-up of 2 years, were assessed using clinical tests, knee arthrometer (KT 1000™), single-leg hop test, Lysholm knee score, Tegner's activity scale, and return to sports...
November 14, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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