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failed implant

Michael B Gerhardt, Benjamin S Assenmacher, Jorge Chahla
Background: Despite an abundance of literature regarding construct strength for a myriad of anchors and anchor configurations in the shoulder, there remains a paucity of biomechanical studies detailing the efficacy of these implants for proximal hamstring repair. Purpose: To biomechanically evaluate the ultimate failure load and failure mechanism of knotless and knotted anchor configurations for hamstring repair. Study Design: Controlled laboratory study...
February 2019: Orthopaedic Journal of Sports Medicine
Zhaozhao Chen, Cho-Ying Lin, Junying Li, Hom-Lay Wang, Haiyang Yu
STATEMENT OF PROBLEM: Whether abutment height can influence peri-implant marginal bone loss has not yet been determined. PURPOSE: The purpose of this systematic review and meta-analysis was to investigate the early and late marginal bone loss around implants with long and short abutment height. MATERIAL AND METHODS: Electronic (PubMed, EMBASE, and Cochrane) and hand literature searches were performed to identify articles published up to May 2018...
February 16, 2019: Journal of Prosthetic Dentistry
Jonathan T Evans, Robert W Walker, Jonathan P Evans, Ashley W Blom, Adrian Sayers, Michael R Whitehouse
BACKGROUND: Knee replacements are the mainstay of treatment for end-stage osteoarthritis and are effective. Given time, all knee replacements will fail and knowing when this failure might happen is important. We aimed to establish how long a knee replacement lasts. METHODS: In this systematic review and meta-analysis, we searched MEDLINE and Embase for case series and cohort studies published from database inception until July 21, 2018. Articles reporting 15 year or greater survival of primary total knee replacement (TKR), unicondylar knee replacement (UKR), and patellofemoral replacements in patients with osteoarthritis were included...
February 16, 2019: Lancet
Jonathan T Evans, Jonathan P Evans, Robert W Walker, Ashley W Blom, Michael R Whitehouse, Adrian Sayers
BACKGROUND: Total hip replacement is a common and highly effective operation. All hip replacements would eventually fail if in situ long enough and it is important that patients understand when this might happen. We aimed to answer the question: how long does a hip replacement last? METHODS: We did a systematic review and meta-analysis with a search of MEDLINE and Embase from the start of records to Sept 12, 2017. We included articles reporting 15-year survival of primary, conventional total hip replacement constructs in patients with osteoarthritis...
February 16, 2019: Lancet
Gwendolyn Vuurberg, Mikel L Reilingh, Christiaan J A van Bergen, Inge C M van Eekeren, Rogier M Gerards, C Niek van Dijk
No abstract text is available yet for this article.
February 2019: American Journal of Sports Medicine
Jian Xu, Wei Lu, Hao Li
No abstract text is available yet for this article.
February 2019: American Journal of Sports Medicine
Leonardo Marcos Mezzari, Bruno Tochetto Primo, Caren Serra Bavaresco, Raquel Linderman, Elken Gomes Rivaldo
PURPOSE: To evaluate the clinical and radiographic outcomes of full-arch mandibular rehabilitation with fixed prostheses supported by three immediately loaded implants after at least 5 years of follow-up. MATERIALS AND METHODS: The sample comprised 58 patients who underwent treatment with immediate loading. Radiographic evaluation of bone loss was carried out in Adobe Photoshop CS5 by a single calibrated examiner using digitized panoramic radiographs. Clinical examination of the technical conditions of the prosthetic device assessed the condition of the acrylic resin base, dental occlusion, metal framework, presence of cover screws, screw fixation of the prosthesis and abutments, and length of cantilever and resistance arms...
February 19, 2019: International Journal of Oral & Maxillofacial Implants
Mustafa Gungormus, Guzin Neda Hasanoglu Erbasar
Removal of osseointegrated but otherwise failed (mechanical failure, mispositioning, aesthetics, etc.) dental implants is a traumatic process resulting in loss of healthy bone and complicating the treatment process. The traumatic effects of implant removal can be reduced by weakening the implant-bone attachment. Thermal necrosis-aided implant removal has been proposed as a minimally invasive method towards this end. In this method; an electrocautery tip is contacted to the implant to increase the temperature to 47oC and generate a limited and controlled thermal necrosis at the bone-implant interface...
February 18, 2019: Journal of Oral Implantology
Gyoten Takayuki, Herwig Volker, Harnath Axel, Fritzsche Dirk
We report the first successful case, to our knowledge, of CoreValve Evolut R (Medtronic, Minneapolis, MN) implantation into a failed HAART 300 aortic annuloplasty device (BioStable Science & Engineering, TX). An 81-year-old man presented with severe symptomatic aortic regurgitation secondary to failure of the 21 mm HAART 300 device, which had been implanted 45 days previously. Transthoracic echocardiography (TTE) revealed grade 3 aortic regurgitation with central jet, without aortic valve stenosis. Because of the high risk for redo surgery, the heart team proceeded with femoral transcatheter aortic valve implantation...
February 17, 2019: Catheterization and Cardiovascular Interventions
Daniel R Greenberg, Michael T Richardson, Jonathan D Tijerina, Michelle B Bass, Michael L Eisenberg
INTRODUCTION: Erectile dysfunction (ED) is a common medical condition that requires high-quality evidence to guide clinical practice; however, systematic reviews (SRs) and meta-analyses (MAs) often vary in quality, raising concerns regarding the validity of their results. AIM: To perform an objective analysis of SRs and MAs in ED treatment and management and to report on the quality of published literature. METHODS: A comprehensive search in PubMed/MEDLINE and EMBASE of 12 high-impact urology journals was used to identify relevant publications...
February 14, 2019: Journal of Sexual Medicine
Robert G Hauser, Jay Sengupta, Edward J Schloss, Larissa I Stanberry, Moses K Wananu, Raed Abdelhadi
BACKGROUND: Internal insulation breaches (IBR) may result ICD lead failure and adverse clinical events. Concerns exist that the Durata lead may be prone to IBR. OBJECTIVE: Assess Durata failures in the FDA MAUDE database and compare them to failures in MAUDE for Endotak Reliance (ER) and Sprint Quattro Secure (QS) leads. METHODS: We searched the MAUDE database from 2008-2018 for IBR and other failure modes. Included were explanted leads whose manufacturers found an insulation or conductor defect not caused by extrinsic factors...
February 14, 2019: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Isaac Pascual, Pablo Avanzas, Daniel Hernández-Vaquero, Rocío Díaz, Raquel Del Valle, Remigio Padrón, Rebeca Lorca, Victor León, María Martín, Fernando Alfonso, César Morís
BACKGROUND: The aim of this study was to assess the safety and effectiveness of valve in valve (VIV) TAVI with the autoexpandable valve, specifically in patients with failed Mitroflow (MF) bioprosthetic aortic valves. METHODS: Pilot, single center, observational and prospective study that included 45 consecutive patients with symptomatic failed MF bioprosthetic aortic valve, referred for VIV TAVI. The safety primary endpoint was a composite of early events at 30 days, defined by VARC-2 criteria...
February 1, 2019: International Journal of Cardiology
Robert A Kaufmann, Jennifer L D'Auria, Johannes Schneppendahl
Total elbow arthroplasty (TEA) has lower revision-free survivorship than other major joint replacement. Despite this, elbow replacement has remained popular. Surgical technique for TEA destabilizes the elbow by removing the medial and lateral collateral ligaments and, frequently, the radiocapitellar articulation. Current semiconstrained implants aim to allow for physiological varus and valgus motion by employing a sloppy hinge; however, over time, these designs fail owing to nonanatomic force transmission. Nonanatomic force transmission results from ligament release, force transmission primarily to the humeral and ulnar shafts, and radial head resection...
February 12, 2019: Journal of Hand Surgery
Ki-Tae Koo, Fouad Khoury, Philip Leander Keeve, Frank Schwarz, Ausra Ramanauskaite, Anton Sculean, Georgios Romanos
INTRODUCTION: The purpose of this review was to evaluate the available published clinical studies to understand the current data on the decontamination efficacy of various agents used in the treatment of periimplantitis and reosseointegration. MATERIALS AND METHODS: An electronic PubMed literature search was conducted for studies published from 1998 until 2018. Literature on clinical studies was included in the review. Of the 189 studies retrieved from the literature search, 33 articles were selected for the review...
November 29, 2018: Implant Dentistry
Sergei A Kuznetsov, Astar Hailu-Lazmi, Natasha Cherman, Luis F de Castro, Pamela G Robey, Raphael Gorodetsky
Osteoarthritic and other types of articular cartilage defects never heal on their own. Medicinal and surgical approaches are often ineffective, and the supply of autologous chondrocytes for tissue engineering is very limited. Bone marrow stromal cells (BMSCs, also known as bone marrow-derived mesenchymal stem cells) have been suggested as an adequate cell source for cartilage reconstruction. However, the majority of studies employing BMSCs for cartilage tissue engineering have used BMSCs predifferentiated into cartilage prior to implantation...
February 14, 2019: Stem Cells Translational Medicine
Ashton H Goldman, Rafael J Sierra, Robert T Trousdale, David G Lewallen, Daniel J Berry, Matthew P Abdel
BACKGROUND: As revision implants and techniques have evolved and improved, understanding why contemporary revision total hip arthroplasties (THAs) fail is important to direct further improvement and innovation. As such, the goals of this study are to determine the implant survivorship of contemporary revision THAs, as well as the most common indications for re-revision. METHODS: We retrospectively reviewed 2589 aseptic revision THAs completed at our academic institution between 2005 and 2015 through our total joint registry...
January 23, 2019: Journal of Arthroplasty
Xiaoyan Mao, Ling Wu, Qiuju Chen, Yanping Kuang, Shaozhen Zhang
OBJECTIVE: To study if hysteroscopy (HSC) before starting an in-vitro fertilization (IVF) cycle improves IVF outcomes in women with recurrent implantation failure (RIF). METHODS: The Medline, Cochrane, EMBASE, and Google Scholar databases were searched using the following keywords until March 31, 2017: in-vitro fertilization; infertility; hysteroscopy; recurrence; embryo implantation; and pregnancy. Randomized controlled trials (RCTs), two-arm prospective studies, and retrospective studies were included...
February 2019: Medicine (Baltimore)
B Poberaj, B Marjanovič, M Zupančič, M Nabergoj, E Cvetko, M Balažic, V Senekovič
PURPOSE: A new arthroscopic technique with Cobra Guide (CG) was developed to enable fast, controlled and strong intraosseous biceps tenodesis while avoiding an implant. The purpose of this study was to compare the newly developed suture-only biceps tenodesis technique [arthroscopic suprapectoral intraosseous implant-free biceps tenodesis (ASIIBT) with the new CG] to classical interference screws (IS) and suture anchors (SA) in terms of construct resistance to failure. MATERIALS AND METHODS: Fifty-eight human cadaveric shoulders were randomized into three treatment groups...
February 14, 2019: Musculoskeletal Surgery
James A Mann, William T Abraham
PURPOSE OF REVIEW: Despite advances in medical therapy, heart failure with reduced ejection fraction (HFrEF) is still a leading cause of mortality, hospitalizations, and healthcare costs. In this review, we describe two novel, implantable devices for the treatment of patients with HFrEF, cardiac contractility modulation (CCM), and baroreflex activation therapy (BAT), and summarize literature regarding these devices from the last 5 years. RECENT FINDINGS: CCM improves quality of life and functional capacity as assessed by the Minnesota Living with Heart Failure Questionnaire (MLHFQ) score, 6-min hall walk test (6MHWT) distance, New York Heart Association (NYHA) functional class, peak oxygen consumption (pVO2 ), heart failure (HF) hospitalizations, and mortality...
February 14, 2019: Current Heart Failure Reports
Takahiro Ogura, Tim Bryant, Gergo Merkely, Tom Minas
BACKGROUND: Treating bipolar chondral lesions in the patellofemoral (PF) compartment is a challenging problem. There are few reports available on the treatment of bipolar chondral lesions in the PF compartment. PURPOSE: To evaluate the clinical outcomes and graft survivorship after autologous chondrocyte implantation (ACI) for the treatment of bipolar chondral lesions in the PF compartment. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: The authors evaluated 58 patients who had ACI by a single surgeon for the treatment of symptomatic bipolar chondral lesions in the PF compartment between November 1995 and June 2014...
February 13, 2019: American Journal of Sports Medicine
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