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Viable allograft

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https://www.readbyqxmd.com/read/28738433/implantation-of-a-novel-cryopreserved-viable-osteochondral-allograft-for-articular-cartilage-repair-in-the-knee
#1
C Thomas Vangsness, Geoffrey Higgs, James K Hoffman, Jack Farr, Philip A Davidson, Farrell Milstein, Sandra Geraghty
No abstract text is available yet for this article.
July 24, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28731936/case-series-keratolimbal-allograft-as-a-patch-graft-for-glaucoma-drainage-devices
#2
Sarah F Ahmed, Mason Schmutz, Sameh Mosaed
PURPOSE: Tube exposure remains one of the most common complications after glaucoma drainage device (GDD) implantation, despite various types of patch grafts available today. We present a 4 patient case series following the effectivity of the keratolimbal allograft (KLAL) as a patch graft for cases of tube exposure. Given its inherent population of stem cells, our hypothesis was that this highly replicative, biological tissue would provide an adequate means of glaucoma tube coverage. The subset of patients chosen for the KLAL patch graft all had a history of abnormally scarred conjunctiva or thin sclera...
July 20, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28659718/pasteurized-autograft-prosthesis-composite-reconstruction-may-not-be-a-viable-primary-procedure-for-large-skeletal-defects-after-resection-of-sarcoma
#3
Seung Yong Lee, Dae-Geun Jeon, Wan Hyeong Cho, Won Seok Song, Chang-Bae Kong, Bum Suk Kim
BACKGROUND: Among various types of composite biological reconstruction, pasteurized autograft-prosthesis composite (PPC) is popular when allograft is unavailable. Previous limited cohort study indicated result comparable to tumor prosthesis. However, as case number and follow-up increase, we experienced more complications than anticipated. We questioned the usefulness of PPC as a viable reconstructive option. METHODS: We reviewed 142 PPCs and analyzed overall and location-related survival and factors associated with the failure of PPC...
2017: Sarcoma
https://www.readbyqxmd.com/read/28646420/composite-reverse-shoulder-arthroplasty-can-provide-good-function-and-quality-of-life-in-cases-of-malignant-tumour-of-the-proximal-humerus
#4
Cyril Lazerges, Louis Dagneaux, Benjamin Degeorge, Nicolas Tardy, Bertrand Coulet, Michel Chammas
PURPOSE: Management of proximal humeral tumours remains a surgical challenge. No study to date has assessed the quality of life scores following the composite reverse shoulder arthroplasty for this indication. We, therefore, evaluated function and quality of life following reconstruction with allograft for malignant tumour of the humerus. METHODS: A series of six cases of humeral tumour treated by a single surgeon in a single centre was reviewed after a mean follow-up of 5...
June 23, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28639977/topical-delivery-of-immunosuppression-to-prolong-xenogeneic-and-allogeneic-split-thickness-skin-graft-survival
#5
Melissa Mastroianni, Zhi Yang Ng, Ritu Goyal, Christopher Mallard, Evan A Farkash, David A Leonard, Alexander Albritton, Kumaran Shanmugarajah, Josef M Kurtz, David H Sachs, Lauren K Macri, Joachim Kohn, Curtis L Cetrulo
Cadaveric skin allograft is the current standard of treatment for temporary coverage of large burn wounds. Porcine xenografts are viable alternatives but undergo α-1,3-galactose (Gal)-mediated hyperacute rejection and are lost by POD 3 because of naturally occurring antibodies to Gal in primate recipients. Using baboons, we previously demonstrated that xenografts from GalT-KO swine (lacking Gal) provided wound coverage comparable with allografts with systemic immunosuppression. In this study, we investigate topical immunosuppression as an alternative to prolong xenograft survival...
June 7, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28624031/lung-transplantation-with-lungs-from-older-donors-an-analysis-of-survival-in-elderly-recipients
#6
Jacob Katsnelson, Bryan A Whitson, Dmitry Tumin, Yazhini Ravi, Ahmet Kilic, Joseph D Tobias, Chittoor B Sai-Sudhakar, Don Hayes
BACKGROUND: The average ages of lung transplant (LTx) recipients and donors are increasing. With older recipients considered to be especially at high risk of posttransplant mortality, we sought to determine whether the use of allografts from older donors affects survival among older patients undergoing LTx. METHODS: The United Network for Organ Sharing registry was used to identify patients aged 65-80 y receiving a first-time LTx between 1987 and 2013. Survival analysis examined implications of a donor-recipient age difference >10 y using Cox proportional hazards regression...
June 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28618872/outcomes-of-patellofemoral-osteochondral-lesions-treated-with-structural-grafts-in-patients-older-than-40-years
#7
Ryan M Degen, Nathan W Coleman, Danielle Tetreault, Brenda Chang, Greg T Mahony, Christopher L Camp, Shawn G Anthony, Riley J Williams
Background Chondral lesions in the patellofemoral compartment represent a difficult entity to treat among active patients, with no clear consensus on the optimal treatment strategy. The purpose of this study was to review the functional outcomes of patients >40 years old with primary patellofemoral osteochondral lesions who underwent a cartilage restoration procedure with a structural graft. Methods Following institutional review board approval, 35 patients >40 years treated for patellofemoral chondral or osteochondral injuries were retrospectively identified...
July 2017: Cartilage
https://www.readbyqxmd.com/read/28606481/micropuncture-and-pressure-assisted-schwann-cell-seeding-of-nerve-allograft
#8
Jonathan Isaacs, Nathan Richards, John McMurtry, Satya Mallu, Gaurangkumar Patel, Matthew Thompson, Dorne Yager
BACKGROUND: Tissue processing to create immunotolerant nerve allograft removes neurosupportive cells. Few strategies have been described for implanting new cells into the graft to support axonal regeneration. NEW METHOD: Micropuncture of the nerve allograft surface combined with immersion into a pressurized cell-rich solution to potentiate the introduction of viable Schwann cells (SC) into processed nerve allograft. Allografts were used to repair rodent sciatic nerve defects...
June 9, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28602591/skin-grafts-from-genetically-modified-%C3%AE-1-3-galactosyltransferase-knockout-miniature-swine-a-functional-equivalent-to-allografts
#9
D A Leonard, C Mallard, A Albritton, R Torabi, M Mastroianni, D H Sachs, J M Kurtz, C L Cetrulo
Burn is associated with a considerable burden of morbidity worldwide. Early excision of burned tissue and skin grafting of the resultant wound has been established as a mainstay of modern burn therapy. However, in large burns, donor sites for autologous skin may be limited. Numerous alternatives, from cadaver skin to synthetic substitutes have been described, each with varying benefits and limitations. We previously proposed the use of genetically modified (alpha-1,3-galactosyl transferase knockout, GalT-KO) porcine skin as a viable skin alternative...
June 8, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28580270/anatomical-glenoid-reconstruction-using-fresh-osteochondral-distal-tibia-allograft-after-failed-latarjet-procedure
#10
Anthony Sanchez, Marcio B Ferrari, Ramesses A Akamefula, Rachel M Frank, George Sanchez, Matthew T Provencher
In the treatment of recurrent anterior glenohumeral instability, the Latarjet procedure has been shown to fail. This results in a need for viable revisional procedures for patients who present with this challenging pathology. We report our preferred technique for anatomical glenoid reconstruction using a fresh osteochondral distal tibia allograft after a failed Latarjet procedure. This bony augmentation technique employs a readily available dense, weight-bearing osseous tissue source that has excellent conformity, as well as the added benefit of a cartilaginous surface to correct chondral deficiencies...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28580252/arthroscopic-hip-labral-augmentation-technique-with-iliotibial-band-graft
#11
Renato Locks, Jorge Chahla, Jonathan M Frank, Jack Anavian, Jonathan A Godin, Marc J Philippon
The importance of the acetabular labrum has been well documented for the function and overall health of the hip joint. Several biomechanical studies have shown the sealing effect of the acetabular labrum. In the past decade, labral repair procedures have gained increased attention, with the literature suggesting that the outcomes after hip arthroscopy are directly related to labral preservation. However, a primary labral repair can be challenging in cases of hypoplastic, ossified, or complex and irreparable labral tears in which there is insufficient tissue to perform a primary repair...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28551052/fresh-osteochondral-allotransplants-outcomes-failures-and-future-developments
#12
M Tschon, F Veronesi, S Giannini, M Fini
Osteochondral allografts are used to treat many different conditions as acute traumatic large-sized lesions, degenerative osteoarthritis, osteochondritis dissecans, avascular necrosis or in case of failure of previous procedures particularly in young patients for whom primary prosthesis is not desirable. Fresh allografts present the advantage of having mature viable hyaline cartilage, not causing donor morbidity, allowing the restoration of even large defects in a single surgical session. Conversely, they could account for risks of disease transmission, immunologic reactions, and for limited availability...
May 11, 2017: Injury
https://www.readbyqxmd.com/read/28550794/minimal-resection-interposition-arthroplasty-of-the-first-metatarsophalangeal-joint
#13
Panagiotis K Givissis, Panagiotis D Symeonidis, Dimitrios M Kitridis, Dimitrios N Daskalakis, Anastasios G Christodoulou
BACKGROUND: Interposition arthroplasty of the first metatarsophalangeal (MTP) joint is a viable alternative to fusion in patients with advanced hallux rigidus. The purpose of this study is to evaluate the midterm results of a modification of the technique. METHODS: Case series of 18 interposition arthroplasties were performed on 13 female patients with Grade III-IV hallux rigidus. The technique included cheilectomy, bunionectomy when needed, minimal resection of the base of the proximal phalanx and interposition of a fascia lata allograft in the first metatarsophalangeal joint...
March 23, 2017: Foot
https://www.readbyqxmd.com/read/28546378/pediatric-lung-transplantation
#14
Stuart C Sweet
Pediatric lung transplant is a viable option for treatment of end-stage lung disease in children, with > 100 pediatric lung transplants reported to the Registry of the International Society of Heart and Lung Transplantation each year. Long-term success is limited by availability of donor organs, debilitation as a result of chronic disease, impaired mucus clearance resulting from both surgical and pharmacologic interventions, increased risk for infection resulting from immunosuppression, and most importantly late complications, such as chronic lung allograft dysfunction...
June 2017: Respiratory Care
https://www.readbyqxmd.com/read/28530850/fresh-osteochondral-allograft-transplantation-is-graft-storage-time-associated-with-clinical-outcomes-and-graft-survivorship
#15
Kenneth J Schmidt, Luís E Tírico, Julie C McCauley, William D Bugbee
BACKGROUND: Regulatory concerns and the popularity of fresh osteochondral allograft (OCA) transplantation have led to a need for prolonged viable storage of osteochondral grafts. Tissue culture media allow a longer storage time but lead to chondrocyte death within the tissue. The long-term clinical consequence of prolonged storage is unknown. HYPOTHESIS: Patients transplanted with OCAs with a shorter storage time would have lower failure rates and better clinical outcomes than those transplanted with OCAs with prolonged storage...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28495618/a-model-of-acute-renal-allograft-rejection-in-outbred-yorkshire-piglets
#16
Randi Lassiter, Youli Wang, Xuexiu Fang, Matt Winn, Arina Ghaffari, Chak-Sum Ho, Sandra Helman, Ryan Jajosky, Daniel Kleven, N Stanley Nahman, Todd D Merchen
Pigs represent a desirable animal model for the study of rejection in kidney transplantation with inbred Yucatan miniature swine (YMS) the most commonly studied strain due to well defined swine leukocyte antigen (SLA) genotypes. However, limitations to YMS may include cost and availability. Outbred Yorkshire pigs are widely available and significantly cheaper than YMS. Recent advances in SLA genotyping have allowed its application to outbred strains. On this basis, we theorized that Yorkshire pigs would be a viable alternative to YMS for the study of rejection in kidney transplantation...
May 8, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28472471/successful-immunosuppressant-free-heterotopic-transplantation-of-tracheal-allografts-in-the-pig
#17
Julien De Wolf, Mathias Brieu, Christophe Zawadzki, Alexandre Ung, Eric Kipnis, Ramadan Jashari, Thomas Hubert, Pierre Fayoux, Christophe Mariette, Marie-Christine Copin, Alain Wurtz
OBJECTIVES: It has been demonstrated that both heterotopic and orthotopic transplants of epithelium-denuded cryopreserved tracheal allografts are feasible in immunosuppressant-free rabbits. Validation of these results in large animals is required before considering clinical applications. We evaluated the viability, immune tolerance and strain properties of such tracheal allografts heterotopically transplanted in a pig model. METHODS: Ten tracheal segments, 5 short (5 rings) and 5 long (10 rings), were obtained from male Landrace pigs...
May 2, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28469646/neural-grafting-for-parkinson-s-disease-challenges-and-prospects
#18
REVIEW
Thomas B Stoker, Nicholas F Blair, Roger A Barker
Parkinson's disease (PD) is a neurodegenerative condition which causes a characteristic movement disorder secondary to loss of dopaminergic neurons in the substanitia nigra. The motor disorder responds well to dopamine-replacement therapies, though these result in significant adverse effects due to non-physiological release of dopamine in the striatum, and off-target effects. Cell-based regenerative treatments offer a potential means for targeted replacement of dopamine, in a physiological manner. Dopaminergic neurons for cell-based therapies can be obtained from several sources...
March 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28461922/bone-grafts-bone-graft-extenders-substitutes-and-enhancers-for-acetabular-reconstruction-in-revision-total-hip-arthroplasty
#19
REVIEW
Luca Pierannunzii, Luigi Zagra
Acetabular bone loss is a relevant concern for surgeons dealing with a failed total hip arthroplasty.Since the femoral head is no longer available, allografts represent the first choice for most reconstructive solutions, either as a structural buttress or impacted bone chips.Even though fresh-frozen bone is firmly recommended for structural grafts, freeze-dried and/or irradiated bone may be used alternatively for impaction grafting. Indeed, there are some papers on freeze-dried or irradiated bone impaction grafting, but their number is limited, as is the number of cases...
December 2016: EFORT open reviews
https://www.readbyqxmd.com/read/28446192/prospective-clinical-and-radiographic-evaluation-of-an-allogeneic-bone-matrix-containing-stem-cells-trinity-evolution%C3%A2-viable-cellular-bone-matrix-in-patients-undergoing-two-level-anterior-cervical-discectomy-and-fusion
#20
Timothy A Peppers, Dennis E Bullard, Jed S Vanichkachorn, Scott K Stanley, Paul M Arnold, Erik I Waldorff, Rebekah Hahn, Brent L Atkinson, James T Ryaby, Raymond J Linovitz
BACKGROUND: Trinity Evolution® (TE), a viable cellular bone allograft, previously demonstrated high fusion rates and no safety-related concerns after single-level anterior cervical discectomy and fusion (ACDF) procedures. This prospective multicenter clinical study was performed to assess the radiographic and clinical outcomes of TE in subjects undergoing two-level ACDF procedures. METHODS: In a prospective, multicenter study, 40 subjects that presented with symptomatic cervical degeneration at two adjacent vertebral levels underwent instrumented ACDF using TE autograft substitute in a polyetherethereketone (PEEK) cage...
April 26, 2017: Journal of Orthopaedic Surgery and Research
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