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https://www.readbyqxmd.com/read/29575168/site-level-risk-predictors-of-peri-implantitis-a-retrospective-analysis
#1
Purnima S Kumar, Shareef M Dabdoub, Rachna Hegde, Nanditha Ranganathan, Angelo Mariotti
AIM: The goal of the present investigation was to identify site-level factors that might allow prognostication of individual implants in partially-dentate patients with multiple non-splinted restorations. METHODS: We analyzed clinical and radiographic characteristics of 222 non-splinted single implants in function for at least 5 years in 86 partially dentate individuals at the time of functional loading and at follow-up, with the outcome variable being peri-implantitis...
March 25, 2018: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/29571671/impact-of-particulate-deproteinized-bovine-bone-mineral-and-porous-titanium-granules-on-early-stability-and-osseointegration-of-dental-implants-in-narrow-marginal-circumferential-bone-defects
#2
A Verket, S P Lyngstadaas, H Tiainen, H J Rønold, J C Wohlfahrt
The use of two particulate bone graft substitute materials in experimental narrow marginal peri-implant bone defects was investigated with respect to early bone healing and implant stability. Porous titanium granules, oxidized white porous titanium granules (WPTG), and demineralized bovine bone mineral (DBBM) were characterized in vitro, after which the two latter materials were tested in experimental peri-implant bone defects in six minipigs, with empty defects as control. After mandibular premolar extraction, the top 5mm of the alveoli were widened to 6mm in diameter, followed by the placement of six implants, three on each side, in each pig...
March 20, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29555560/total-shoulder-prosthesis-with-humeral-resurfacing-impact-on-lateral-offset-and-short-term-clinical-consequences
#3
A Galland, S Airaudi, J Mancini, R Gravier, D Camus
BACKGROUND: Reports of early glenoid wear after humeral resurfacing hemiarthroplasty have prompted the use, in combination with this procedure, of newly developed glenoid implants. This combination can increase global humeral offset. The objectives of this study were to assess changes in overall lateral offset and their potential short-term clinical consequences after combined humeral resurfacing and glenoid replacement. HYPOTHESIS: Combined humeral resurfacing and glenoid replacement induces a large increase in overall lateral offset, resulting in short-term clinical consequences...
March 16, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29555558/are-commercially-available-precontoured-anatomical-clavicle-plating-systems-offering-the-purported-superior-optimum-fitting-to-the-clavicle-a-cadaveric-analysis-and-review-of-literature
#4
D E Bauer, A Hingsammer, P Schenk, L Vlachopoulos, M A Imam, P Fürnstahl, D C Meyer
PURPOSE: The indication for operative treatment of displaced midshaft clavicle fractures remains controversial. However, if plate fixation is considered, implant prominence and skin irritation are the most common causes for re-operation. Low profile implants as well as closely contouring plates to the individual anatomy may reduce these complications. The aim of this study was to compare the fitting accuracy and implant prominence of 3.5mm pelvic reconstruction plates (PRP) with pre-contoured anatomical clavicle plates (PACP) for midshaft clavicle fractures...
March 16, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29501642/implantation-depth-and-rotational-orientation-effect-on-valve-in-valve-hemodynamics-and-sinus-flow
#5
Hoda Hatoum, Jennifer Dollery, Scott M Lilly, Juan A Crestanello, Lakshmi Prasad Dasi
BACKGROUND: This study aims to evaluate the effect of transcatheter aortic valve (TAV) implantation depth and rotation on pressure gradient (PG), leakage fractions (LF), leaflet shear stress and sinus washout in an effort to understand factors that may dictate optimal positioning for valve-in-valve (ViV) procedures. Sinus flow stasis is often associated with prosthetic leaflet thrombosis. While recent ViV in-vitro studies highlighted transcatheter aortic valve (TAV) supra-annular implantation potential benefits to minimize pressure gradients, the relationship between TAV depth and other determinates of valve function remains unknown...
March 1, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29462729/the-influence-of-artificial-cervical-disc-prosthesis-height-on-the-cervical-biomechanics-a-finite-element-study
#6
Wei Yuan, Haiping Zhang, Xiaoshu Zhou, Weidong Wu, Yue Zhu
OBJECTIVE: Artificial cervical disc replacement is expected to maintain normal cervical biomechanics. The effect of Prestige LP prosthesis height on cervical biomechanics has not been thoroughly studied yet. This finite element (FE) study of the cervical biomechanics aims to predict how the parameters like range of motion (ROM), adjacent intradiscal pressure, facet joint force and bone-implant interface stress are affected by different Prestige LP prosthesis heights. METHODS: The FE model of intact cervical spine (C3-C7) was obtained from our previous study, and the model was altered to implant Prestige LP prostheses at the C5-C6 level...
February 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29424019/altering-spacer-material-affects-bone-regeneration-in-the-masquelet-technique-in-a-rat-femoral-defect
#7
Sarah McBride-Gagyi, Zacharie Toth, Daniel Kim, Victoria Ip, Emily Evans, J Tracy Watson, Daemeon Nicolaou
The Masquelet technique depends on pre-development of a foreign-body membrane to support bone regeneration with grafts over three times larger than the traditional maximum. To date, the procedure has always used spacers made of bone cement, which is the polymer polymethyl methacrylate (PMMA), to induce the foreign-body membrane. This study sought to compare (i) morphology, factor expression, and cellularity in membranes formed by PMMA, titanium, and polyvinyl alcohol sponge (PVA) spacers in the Masquelet milieu and (ii) subsequent bone regeneration in the same groups...
February 9, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29352699/computed-tomography-ct-assessment-of-the-membranous-septal-anatomy-prior-to-transcatheter-aortic-valve-replacement-tavr-with-the-balloon-expandable-sapien-3-valve
#8
Brett A Oestreich, Mackenzie Mbai, Sergey Gurevich, Prabhjot S Nijjar, Selcuk Adabag, Stefan Bertog, Rosemary Kelly, Santiago Garcia
OBJECTIVES: The lower limit of the membranous septum (MS) is considered an anatomic landmark for the emergence of the Bundle of His into the left ventricle. Computed tomography (CT) assessment of MS anatomy may provide useful information about the risk of conduction abnormalities following transcatheter aortic valve replacement (TAVR). METHODS AND RESULTS: The study included 102 consecutive patients undergoing TAVR with the Edwards Sapien 3 (S3) valve. Using pre-TAVR CT and post-procedure angiography we evaluated for the presence of calcium in the left ventricular outflow tract (LVOT), calcium depth (CD), implantation depth (ID) and MS length...
December 27, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29325837/outcomes-of-total-knee-arthroplasty-in-degenerative-osteoarthritic-knee-with-genu-recurvatum
#9
Seung-Suk Seo, Chang-Wan Kim, Chang-Rack Lee, Jin-Hyuk Seo, Do-Hun Kim, Ok-Gul Kim
BACKGROUND: This study aimed to assess the incidence of genu recurvatum without neuromuscular disorders in knees that underwent navigation-assisted total knee arthroplasty (TKA), to evaluate short-term radiologic and clinical results of navigation-assisted TKA in genu recurvatum, and to evaluate differences in results according to the degree of pre-operative hyperextension and type of implant and insert. METHODS: This study retrospectively reviewed 510 knees that underwent navigation-assisted TKA from January 2005 to December 2011...
January 2018: Knee
https://www.readbyqxmd.com/read/29243685/the-efficacy-of-short-6-mm-dental-implants-with-a-novel-thread-design
#10
Soheil Bechara, Tatjana Nimčenko, Ričardas Kubilius
OBJECTIVE: To assess efficacy of short (6 mm) implants with a novel macrostructure and thread design placed in a compromised bone situations of edentulous posterior regions of maxilla (3-4 mm of bone height under sinus floor) as compared to results of clinical situations treated with simultaneous maxillary sinus grafting and placement of long (≥10 mm) implants of the same company. STUDY DESIGN: Clinical cases of conducted clinical study. PATIENTS AND METHODS: Patients with compromised bone height in edentulous posterior regions of maxilla were randomly divided into two groups...
2017: Stomatologija
https://www.readbyqxmd.com/read/29179980/dimensions-of-hard-and-soft-tissue-around-adjacent-compared-with-single-tooth-zirconia-implants
#11
K Kniha, A Modabber, H Kniha, S C Möhlhenrich, F Hölzle, S Milz
Preservation or regeneration of the papilla has always been a challenge around consecutive implants or with implants next to teeth, and many studies have evaluated the papilla's behaviour and patterns based on surgical technique and prosthetic design, though evidence about its behaviour around zirconia implants is scarce. The aim of this study was to evaluate papilla behaviour between implants and teeth (tooth-implant group) and between consecutive implants (implant-implant group). Ninety patients with 122 zirconia implants (Straumann® PURE Ceramic Implant) were examined at the one-year follow up...
January 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29146240/channelled-tablets-an-innovative-approach-to-accelerating-drug-release-from-3d-printed-tablets
#12
Muzna Sadia, Basel Arafat, Waqar Ahmed, Robert T Forbes, Mohamed A Alhnan
Conventional immediate release dosage forms involve compressing the powder with a disintegrating agent that enables rapid disintegration and dissolution upon oral ingestion. Among 3D printing technologies, the fused deposition modelling (FDM) 3D printing technique has a considerable potential for patient-specific dosage forms. However, the use of FDM 3D printing in tablet manufacturing requires a large portion of polymer, which slows down drug release through erosion and diffusion mechanisms. In this study, we demonstrate for the first time the use of a novel design approach of caplets with perforated channels to accelerate drug release from 3D printed tablets...
January 10, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29122124/anatomical-and-radiological-evaluation-of-less-invasive-stabilisation-system-liss-in-correlation-with-knee-lateral-collateral-ligament-insertion
#13
Florian Freimoser, Stephan Grechenig, Anna Ofenhitzer, Bore Bakota, Mario Staresinic, Christian G Pfeifer
INTRODUCTION: The Less Invasive Stabilisation System (LISS) is an angle-stable plate that enables treatment of distal femoral comminuted and periprosthetic fracture. As it is placed through a minimally-invasive lateral approach, lateral knee pain is a commonly described symptom after its application. This study investigates knee lateral collateral ligament (LCL) iatrogenic injury during LISS plate fixation. A cadaver study was performed and a retrospective radiological investigation with the analysis of its clinical application was conducted to evaluate possible knee LCL damage...
November 2017: Injury
https://www.readbyqxmd.com/read/29096123/in-vitro-validation-of-a-novel-mechanical-model-for-testing-the-anchorage-capacity-of-pedicle-screws-using-physiological-load-application
#14
Christian Liebsch, Julia Zimmermann, Nicolas Graf, Christoph Schilling, Hans-Joachim Wilke, Annette Kienle
Biomechanical in vitro tests analysing screw loosening often include high standard deviations caused by high variabilities in bone mineral density and pedicle geometry, whereas standardized mechanical models made of PU foam often do not integrate anatomical or physiological boundary conditions. The purpose of this study was to develop a most realistic mechanical model for the standardized and reproducible testing of pedicle screws regarding the resistance against screw loosening and the holding force as well as to validate this model by in vitro experiments...
October 25, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28987316/bypass-for-symptomatic-in-stent-carotid-restenosis
#15
Francesco Stilo, Pasqualino Sirignano, Nunzio Montelione, Wassim Mansour, Laura Capoccia, Vincenzo Catanese, Francesco Spinelli, Francesco Speziale
BACKGROUND: To evaluate early and long-term outcomes of symptomatic patients treated for in-stent carotid restenosis (ISR) with carotid bypass (CB). METHODS: Data were retrospectively collected from a prospectively compiled database on patients treated with CB in two high-volume Italian centers between 2008 and 2016, for symptomatic high-grade ISR after CAS. After carotid endarterectomy and stent removal, a greater saphenous vein (GSV) was preferentially employed as the graft; when the GSV was not accessible, a 6mm polytetrafluoroethylene (PTFE) graft was implanted...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28914597/combination-of-ultrasonic-decontamination-soft-tissue-curettage-and-submucosal-air-polishing-with-povidone-iodine-application-for-non-surgical-therapy-of-peri-implantitis-12-months-clinical-outcomes
#16
Jamal M Stein, Christian Hammächer, Sareh Said-Yekta Michael
BACKGROUND: The aim of this study was to evaluate the clinical outcomes of a concept for non-surgical peri-implantitis combining stepwise mechanical debridement measures with adjuvant Povidone-iodine application with and without systemic antibiotics. METHODS: 45 patients with chronic periodontitis comprising 164 screw-typed implants with peri-implantitis were included. Peri-implantitis was defined as radiographic bone loss of >2 mm, probing pocket depth (PD) ≥5 mm with bleeding on probing (BOP)...
September 15, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28902415/surgical-treatment-of-peri-implantitis-prognostic-indicators-of-short-term-results
#17
Odd Carsten Koldsland, Johan C Wohlfahrt, Anne M Aass
AIM: To evaluate the clinical and radiographic short-term (6 months) effect of surgical treatment of peri-implantitis, and to identify prognostic indicators affecting the outcome using a multilevel statistical model. MATERIALS & METHODS: A total of 143 implants (45 patients) with a diagnosis of progressive peri-implantitis (progressive bone loss (PBL) ≥2.0 mm and bleeding on probing (BoP)/suppuration) received surgical treatment. Clinical and radiographic parameters were assessed 6 months postoperatively...
January 2018: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28888523/mechanical-alignment-technique-for-tka-are-there-intrinsic-technical-limitations
#18
C Rivière, F Iranpour, E Auvinet, A Aframian, K Asare, S Harris, J Cobb, S Parratte
BACKGROUND: Mechanically aligned (MA) total knee arthroplasty (TKA) is affected by disappointing functional outcomes in spite of the recent improvements in surgical precision and implant designs. This might suggest the existence of intrinsic technical limitations. Our study aims to compare the prosthetic and native trochlear articular surfaces and to estimate the extent of collateral ligament imbalance, which is technically uncorrectable by collateral ligament release when TKA implants are mechanically aligned...
September 6, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28887958/photoelastic-analysis-of-mandibular-full-arch-implant-supported-fixed-dentures-made-with-different-bar-materials-and-manufacturing-techniques
#19
Danilo Zaparolli, Raniel Fernandes Peixoto, Denise Pupim, Ana Paula Macedo, Marcelo Bighetti Toniollo, Maria da Glória Chiarello de Mattos
PURPOSE: To compare the stress distribution of mandibular full dentures supported with implants according to the bar materials and manufacturing techniques using a qualitative photoelastic analysis. MATERIAL AND METHODS: An acrylic master model simulating the mandibular arch was fabricated with four Morse taper implant analogs of 4.5×6mm. Four different bars were manufactured according to different material and techniques: fiber-reinforced resin (G1, Trinia, CAD/CAM), commercially pure titanium (G2, cpTi, CAD/CAM), cobalt‑chromium (G3, Co-Cr, CAD/CAM) and cobalt‑chromium (G4, Co-Cr, conventional cast)...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28844907/effect-of-different-stent-configurations-using-lattice-boltzmann-method-and-particles-image-velocimetry-on-artery-bifurcation-aneurysm-problem
#20
N Hafizah Mokhtar, Aizat Abas, N A Razak, Muhammad Najib Abdul Hamid, Soon Lay Teong
Proper design of stent for application at specific aneurysm effect arteries could help to reduce the issues with thrombosis and aneurysm. In this paper, four types of stent configuration namely half-Y (6 mm), half-Y (4 mm), cross-bar, and full-Y configuration will implanted on real 3D artery bifurcation aneurysm effected arteries. Comparisons were then conducted based on the flow patterns after stent placement using both LBM-based solver and PIV experimental findings. According to the data obtained from all 4 stent designs, the flow profiles and the computed velocity from both methods were in agreement with each other...
August 24, 2017: Journal of Theoretical Biology
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