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allograft augmentation

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https://www.readbyqxmd.com/read/29135351/human-studies-of-vertical-and-horizontal-alveolar-ridge-augmentation-comparing-different-types-of-bone-graft-materials-a-systematic-review
#1
Suraj Chavda, Liran Levin
Alveolar ridge augmentation can be completed with various types of bone augmentation materials (autogenous, allograft, xenograft & alloplast). Currently autogenous bone is labelled as the "gold standard" due to faster healing times and integration between native and foreign bone. No systematic review has currently determined whether there is a difference of implant success between various bone augmentation materials. The purpose of this paper was to systematically review comparative human studies of vertical and horizontal alveolar ridge augmentation comparing different types of bone graft materials (autogenous, allograft, xenograft & alloplast)...
November 14, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29120889/bone-resorption-during-submerged-healing-after-guided-bone-regeneration-a-prospective-case-series
#2
Yong Hur, Yumi Ogata, Douglas W Kim, Charles M Pham, Tae-Ho Yoon, Hirokazu Ogata
OBJECTIVE: The aim of this study was to evaluate bone resorption quantitatively during the healing period subsequent to ridge augmentation. MATERIALS AND METHODS: Sixteen patients requiring vertical ridge augmentation before implant placement were recruited in the study. The study used an allograft and nonresorbable membrane. A custom acrylic stent was used to measure changes in bone volume. Augmented bone was compared with remaining bone 6 months after guided bone regeneration (α = 0...
November 8, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29095664/graphene-based-scaffolds-on-bone-tissue-engineering
#3
Nasrin Shadjou, Mohammad Hasanzadeh, Balal Khalilzadeh
Tissue engineering has been emerging as a valid approach to the current therapies for bone regeneration/substitution. Tissue-engineered bone constructs have the potential to alleviate the demand arising from the shortage of suitable autograft and allograft materials for augmenting bone healing. Scaffolds play a central role in tissue engineering research, they not only provide as structural support for specific cells but also provide as the templates to guide new tissue growth and construction. In this survey we describe application of graphene based nano-biomaterials for bone tissue engineering...
November 2, 2017: Bioengineered
https://www.readbyqxmd.com/read/29073551/medial-opening-wedge-high-tibial-osteotomy-in-patients-with-posttraumatic-medial-tibial-plateau-bone-defect-a-case-report
#4
Yoon Young Choi, Seung Joon Rhee
INTRODUCTION: Traumatic uncontained bone defect in the knee joint is one of the most serious knee injuries. As the knee joint is the main weight-bearing joint of the body, the problem of weight loading should be addressed while restoring the bone defect. However, no consensus exists regarding the treatment of this injury. PRESENTATION OF CASE: Two patients in separate cases initially sustained traumatic uncontained proximal tibial bone defects secondary to passenger traffic accidents...
October 18, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29071736/histopathological-comparison-of-healing-after-maxillary-sinus-augmentation-using-xenograft-mixed-with-autogenous-bone-versus-allograft-mixed-with-autogenous-bone
#5
Pablo Galindo-Moreno, Juan G de Buitrago, Miguel Padial-Molina, Juan Emilio Fernández-Barbero, Javier Ata-Ali, Francisco O Valle
OBJECTIVE: To compare the clinical and histologic outcomes of two different grafting materials (allograft and xenograft) when combined with autogenous bone and covered with a collagen membrane for sinus augmentation. MATERIAL AND METHODS: A parallel case series of fourteen patients in need of a unilateral sinus augmentation was evaluated in this study. Seven patients received a graft composed by autologous cortical bone (ACB) and anorganic bovine bone in a ratio of 1:1; the other seven patients received ACB mixed with an allograft in the same ratio...
October 26, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29065477/treatment-of-severely-resorbed-maxilla-due-to-peri-implantitis-by-guided-bone-regeneration-using-a-customized-allogenic-bone-block-a-case-report
#6
Oliver Blume, Lisa Hoffmann, Phil Donkiewicz, Sabine Wenisch, Michael Back, Jörg Franke, Reinhard Schnettler, Mike Barbeck
The objective of this case report is to introduce a customized CAD/CAM freeze-dried bone allograft (FDBA) block for its use in Guided Bone Regeneration (GBR) procedures for severely deficient maxillary bones. Additionally, a special newly developed remote incision technique is presented to avoid wound dehiscence. The results show optimal integration behavior of the FDBA block after six months and the formation of new vital bone. Thus, the results of the present case report confirm the use of the customized CAD/CAM bone block for augmentation of complex defects in the maxillary aesthetic zone as a successful treatment concept...
October 21, 2017: Materials
https://www.readbyqxmd.com/read/29064770/managing-titanium-mesh-exposure-with-the-partial-removal-of-the-exposed-site-a-case-series-study
#7
Aladdin Al-Ardah, Abdulaziz AlHelal, Periklis Proussaefs, Bader AlBader, Abdulakareem A Al Humaidan, Jaime Lozada
This case series report aimed at evaluating the efficacy of addressing exposure of the Titanium mesh by sectioning the exposed portion of the mesh and allowing the remaining portion in place while bone maturation is complete. The use of Titanium mesh for localized alveolar ridge augmentation was evaluated with clinical and radiographic analysis. Materials and methods in the current case series report includes four consecutively treated patients where a titanium mesh was utilized as a barrier for localized alveolar ridge augmentation and exposure of the mesh occurred after the alveolar ridge augmentation procedure...
October 24, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29025603/triangular-block-bridge-method-for-surgical-treatment-of-complex-proximal-humeral-fractures-theoretical-concept-surgical-technique-and-clinical-results
#8
Raffaele Russo, Daniela D'Auria, Michele Ciccarelli, Giuseppe Della Rotonda, Gesualdo D'Elia, Bruno Siciliano
INTRODUCTION: Criteria for classification, indication and choice of a surgical device to treat proximal humeral fractures are still controversial. We report an original technique based on a mechanical concept with a structural principle of a triangle as a rigid body applied to the humeral head fractures in association with other devices. This retrospective study aims to describe in detail the surgical technique and results at long time follow up. METHODS AND MATERIAL: We analysed two series of 101 patients with proximal humeral fractures (mean age, 52...
October 2017: Injury
https://www.readbyqxmd.com/read/29023618/reconstruction-of-atrophied-posterior-mandible-with-an-inlay-technique-and-allograft-block-technical-description-and-histologic-case-reports
#9
Vittorio Checchi, Annalisa Mazzoni, Giovanni Zucchelli, Lorenzo Breschi, Pietro Felice
This paper presents a technical description of the inlay technique performed with an allograft block in the reconstruction of a severely atrophic posterior mandible. It includes a histologic case series of five patients treated with the same grafting procedure and rehabilitated with dental implants 2 months after placement of the graft. The histologic analysis showed large amounts of newly formed bone in tight connection with the allograft and large marrow spaces with intense cellular activity and the presence of osteocytes...
November 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28970995/rotator-cuff-tears-at-the-musculotendinous-junction-classification-and-surgical-options-for-repair-and-reconstruction
#10
Peter J Millett, Zaamin B Hussain, Erik M Fritz, Ryan J Warth, J Christoph Katthagen, Jonas Pogorzelski
Although uncommon, rotator cuff tears that occur medially at the musculotendinous junction can result from acute trauma, anatomic force imbalance, or medial row cuff failure following a previous rotator cuff repair. The quality of the torn muscle and tendon along with the length of the remnant tendon stump should be considered before deciding on the most appropriate repair technique. When muscle and tendon quality are sufficient, the tear can often be repaired directly to the remnant tendon stump and compressed onto the greater tuberosity...
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28963665/locking-plate-and-fibular-strut-graft-augmentation-in-the-reconstruction-of-unicameral-bone-cyst-of-proximal-femur-in-the-paediatric-population
#11
Khodamorad Jamshidi, Masoud Mirkazemi, Azra Izanloo, Alireza Mirzaei
PURPOSE: Several therapeutic strategies have been used for managing unicameral bone cyst (UBC) of the proximal femur. However, there is insufficient evidence to support one treatment over another, and the optimal treatment is controversial. This study aims at describing our experience with surgical reconstruction of paediatric UBCs of the proximal femur using a proximal locking plate and fibular strut allograft. METHODS: In total, 14 consecutive paediatric patients with Dormans types IB (four cases) and IIB (10 cases) UBC were assessed...
September 30, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28963163/cemented-total-hip-arthroplasty-following-acetabular-fracture
#12
C E H Scott, D MacDonald, M Moran, T O White, J T Patton, J F Keating
AIMS: To evaluate the outcomes of cemented total hip arthroplasty (THA) following a fracture of the acetabulum, with evaluation of risk factors and comparison with a patient group with no history of fracture. PATIENTS AND METHODS: Between 1992 and 2016, 49 patients (33 male) with mean age of 57 years (25 to 87) underwent cemented THA at a mean of 6.5 years (0.1 to 25) following acetabular fracture. A total of 38 had undergone surgical fixation and 11 had been treated non-operatively; 13 patients died at a mean of 10...
October 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28894277/host-expression-of-the-cd8-treg-nk-cell-restriction-element-qa-1-is-dispensable-for-transplant-tolerance
#13
Blair T Stocks, Christopher S Wilson, Andrew F Marshall, Lauren A Brewer, Daniel J Moore
Disruption of the non-classical Major Histocompatibility Complex (MHC) Ib molecule Qa-1 impairs CD8 Treg and natural killer (NK) cell function and promotes a lupus-like autoimmune disease. This immune perturbation would be expected to enhance anti-transplant responses and impair tolerance induction, but the effect of Qa-1 deficiency on the transplant response has not been previously reported. Qa-1 deficiency enhanced CD4 TFH and germinal center (GC) B cell numbers in naïve mice and hastened islet allograft rejection...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28886100/biomechanical-evaluation-of-tibial-bone-adaptation-after-revision-total-knee-arthroplasty-a-comparison-of-different-implant-systems
#14
María Paz Quilez, Belen Seral, María Angeles Pérez
The best methods to manage tibial bone defects following total knee arthroplasty remain under debate. Different fixation systems exist to help surgeons reconstruct knee osseous bone loss (such as tantalum cones, cement, modular metal augments, autografts, allografts and porous metaphyseal sleeves) However, the effects of the various solutions on the long-term outcome remain unknown. In the present work, a bone remodeling mathematical model was used to predict bone remodeling after total knee arthroplasty (TKA) revision...
2017: PloS One
https://www.readbyqxmd.com/read/28865557/multimodality-noninvasive-imaging-in-the-monitoring-of-pediatric-heart-transplantation
#15
REVIEW
Steven J Kindel, Hao H Hsu, Tarique Hussain, Jonathan N Johnson, Colin J McMahon, Shelby Kutty
Orthotopic heart transplantation is a well-established and effective therapeutic option for children with end-stage heart failure. Multiple modalities, including noninvasive cardiac imaging, cardiac catheterization, angiography, and endomyocardial biopsy, are helpful to monitor these patients for graft dysfunction, rejection, and vasculopathy. Because of morbidities associated with invasive monitoring, noninvasive imaging plays a key role in the surveillance and evaluation of symptoms in pediatric transplant recipients...
September 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28860398/revision-anatomical-reconstruction-of-the-lateral-ligaments-of-the-ankle-augmented-with-suture-tape-for-patients-with-a-failed-brostr%C3%A3-m-procedure
#16
B K Cho, Y M Kim, S M Choi, H W Park, N F SooHoo
AIMS: The aim of this prospective study was to evaluate the intermediate-term outcomes after revision anatomical ankle ligament reconstruction augmented with suture tape for a failed modified Broström procedure. PATIENTS AND METHODS: A total of 30 patients with persistent instability of the ankle after a Broström procedure underwent revision augmented with suture tape. Of these, 24 patients who were followed up for more than two years were included in the study...
September 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28836446/modified-brostr%C3%A3-m-procedure-using-distal-fibular-periosteal-flap-augmentation-vs-anatomic-reconstruction-using-a-free-tendon-allograft-in-patients-who-are-not-candidates-for-standard-repair
#17
Hong Joon Choi, Dae Wook Kim, Jea Seok Park
BACKGROUND: The modified Broström procedure (MBP) is widely accepted as the primary operative treatment for chronic lateral ankle instability (CLAI). However, the MBP does not produce good clinical results in all patients, and anatomic reconstruction using a free tendon graft may be considered in those patients. The purpose of this study was to evaluate the efficacy of the MBP using distal fibular periosteal flap augmentation for CLAI in patients who were not candidates for standard repair...
November 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28817160/extensor-mechanism-reconstruction-for-chronic-patellar-fracture
#18
Antonio Cusano, Emily J Curry, Lee N Marinko, Xinning Li
Patients with displaced patellar fractures typically present with disruption to the extensor mechanism requiring acute surgical intervention. Chronic patellar fractures with disruption of the extensor mechanism are uncommon, and few surgical options are available. The authors present a patient who sustained a fracture to the inferior pole of the patella in Africa 5 years prior that was managed conservatively with bands and a brace. He decided to pursue surgical intervention because of difficulties with leg extension, weakness, and ambulation...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28806294/the-tissue-engineered-tendon-bone-interface-in-vitro-and-in-vivo-synergistic-effects-of-adipo-derived-stem-cells-platelet-rich-plasma-and-extracellular-matrix-hydrogel
#19
Rory McGoldrick, Arhana Chattopadhyay, Christopher Crowe, Grace Chiou, Kenneth Hui, Simon Farnebo, Christopher Davis, Anais Le Grand, Molly Jacobs, Hung Pham, James Chang
INTRODUCTION: Suboptimal healing of the tendon bone interface (TBI) remains an unsolved problem. One solution is a biocompatible tissue engineered construct that promotes augmented healing. We hypothesisze that 1.) the presence of Platelet Rich Plasma (PRP) and prolonged in vitro incubation produces tissue engineered tendon bone interface scaffolds with greater reseeding of viable Adipo-derived Stem Cells (ADSC) and 2.) when implanted with extracellular matrix hydrogel, constructs will display superior in vivo strength repair and biocompatibility...
August 3, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28802414/management-of-resistant-distal-femur-non-unions-with-allograft-strut-and-autografts-combined-with-osteosynthesis-in-a-series-of-22-patients
#20
Raja Bhaskara Kanakeshwar, Dheenadhayalan Jayaramaraju, Devendra Agraharam, Shanmuganathan Rajasekaran
INTRODUCTION AND PURPOSE: Challenges to the surgeon in managing cases of resistant non-union of the distal femur include poor bone stock, disuse osteopenia and joint contractures. Procedures varying from simple bone grafting to megaprosthesis revision have been described. We successfully managed such cases using our technique of combining cortical allograft struts to augment the defect in the femoral condyle coupled with autogenous iliac crest bone grafting and locking plate osteosynthesis...
August 2017: Injury
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