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Implant supported prosthesis

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https://www.readbyqxmd.com/read/28222876/evaluation-of-the-effect-of-an-offset-implant-configuration-in-the-posterior-maxilla-with-external-hexagon-implant-platform-a-3-dimensional-finite-element-analysis
#1
Victor Eduardo de Souza Batista, Fellippo Ramos Verri, Daniel Augusto de Faria Almeida, Joel Ferreira Santiago Junior, Cleidiel Aparecido Araújo Lemos, Eduardo Piza Pellizzer
STATEMENT OF PROBLEM: Slight displacement of the central implant in 3-unit implant-supported prostheses has been reported to improve biomechanical behavior. However, studies that assessed the effects of an offset implant configuration in the posterior maxilla are scarce. PURPOSE: The purpose of this 3-dimensional (3D) finite element analysis was to assess the effects of splinting in 3-unit implant-supported prostheses with varying implant positions (straight-line or offset configuration) in terms of the stress/strain distribution on bone tissue and the stress distribution on abutment screws...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222867/prosthodontic-treatment-of-a-retrognathic-edentulous-maxilla-demonstrating-limited-interarch-distance-3-5-year-results-with-fixed-and-removable-implant-prostheses
#2
Won-Suk Oh, Furat George, Ju-Mi Park
The prosthodontic treatment of patients with a retrognathic edentulous maxilla should consider the restoration of the lower facial profile and access for oral hygiene. This clinical report describes prosthodontic treatments of a patient with edentulism who presented with repeated fractures of the denture teeth of a maxillary implant-supported complete fixed dental prosthesis (ICFDP) and a mandibular implant-supported overdenture. Considerable plaque accumulation was noted on the ICFDP, which was replaced with an open palatal design implant-supported overdenture...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28217567/painful-knee-prosthesis-ct-scan-to-assess-patellar-angle-and-implant-malrotation
#3
REVIEW
Antonio Spinarelli, Vito Pesce, Caterina Campagna, Giuseppe Maccagnano, Biagio Moretti
BACKGROUND: According to literature, the incidence of pain in knee prostheses is on the increase. In the last decade Authors have focused attention on rotational alignment of the prosthetic components. The aim of this study is to evaluate the efficiency of a new angle, which we define as patellar angle, in order to achieve early diagnosis of malrotation. METHODS: We set up a retrospective observational study recruiting 100 subjects who had undergone total knee prosthesis...
October 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28216844/effect-of-technique-and-impression-material-on-the-vertical-misfit-of-a-screw-retained-three-unit-implant-bridge-an-in-vitro-study
#4
Hamidreza Rajati Haghi, Masoud Shiehzadeh, Mohammadreza Nakhaei, Fatemeh Ahrary, Saeid Sabzevari
INTRODUCTION: A dental impression is a negative imprint of an oral structure that can be used to produce a positive cast of a patient's teeth as a permanent record. The accuracy of the impression affects the accuracy of the cast, and a precise impression is needed in order to create prosthesis with optimal fitting. Minimization of misfit is an important aim in prosthesis science and dental implants. The aim of this study was to evaluate the effects of the materials and techniques used to take an impression on the vertical misfit of implant-supported, screw-retained, three-unit bridges...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28207597/implant-anchorage-in-the-nasopalatine-canal-for-the-rehabilitation-of-severely-atrophic-maxilla
#5
Pâmela Leticia Dos Santos, Gustavo Henrique Souza Silva, Raquel Damazia da Silva, Fernanda Rayssa Da Silva Pereira, Jéssica Lemos Gulinelli
PURPOSE: This study aimed to describe the clinical case of implant placement in the nasopalatine canal as an aid for atrophic maxilla rehabilitation. CASE REPORT: The surgical procedure was carried out in 2 stages, the first part consisted of a surgery to lift the maxillary sinus membrane associated with the xenogeneic bone placement and the second part consisted of the surgery for the implants placement, both under local anesthesia. A number of seven osseointegrated implants were placed in the maxilla, one was anchored in the nasopalatine canal region after having its neurovascular content emptied by means of the use of drill threads of the implant system...
February 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28188110/accuracy-and-mechanical-performance-of-passivated-and-conventional-fabricated-3-unit-fixed-dental-prosthesis-on-multi-unit-abutments
#6
Michael Stimmelmayr, Julian Groesser, Florian Beuer, Kurt Erdelt, Gerald Krennmair, Caroline Sachs, Daniel Edelhoff, Jan-Frederik Güth
PURPOSE: The aim of this study was to evaluate the fit and mechanical stability of conventional versus passive fitting 3-unit fixed dental prosthesis (FDP) screw-retained on implants. METHODS: Twenty acrylic models, each with two embedded implants, were fabricated and functioned as patient-models. Impressions were taken and 20 all-ceramic FDPs were pre-fabricated on the plaster casts. Respectively 10 FDPs were fixed on the plaster casts (group 1) and on the patient-models for passive fitting (group 2)...
February 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28169834/development-of-biomimetic-micro-patterned-device-incorporated-with-neurotrophic-gradient-and-supportive-schwann-cells-for-the-applications-in-neural-tissue-engineering
#7
Chia-Wei Yeh, Li-Wen Wang, Hsi-Chin Wu, Yi-Kong Hsieh, Jane Wang, Ming-Hong Chen, Tzu-Wei Wang
In these years, the artificial nerve guidance conduit has been developed as an alternative way to repair peripheral nerve injury. Unlike autologous nerve graft, the artificial nerve guidance conduit without proper stimulating factors and guidance cues still cannot obtain satisfactory prognosis for clinical patients. In this study, a biodegradable polymer-based implantable device has been developed and characterized. By incorporating three stimulating factors: 1) micro-patterned surface that can directionally guide the axon as physical cue; 2) neurotrophic gradient membrane that can continually attract axon outgrowth from the proximal to distal stump as chemical cue; 3) Schwann cells that can support the growth of neurite and form myelin sheath around axon as biological cue, we expect that this construct can be used as a promising nerve guidance conduit for peripheral nerve regeneration...
February 7, 2017: Biofabrication
https://www.readbyqxmd.com/read/28169270/using-loop-connectors-as-an-interim-mode-of-treatment-an-interdisciplinary-approach
#8
T Aby Mathew, Ashwin Thomas Koshy, Annie Susan Thomas, Angel Mary Joseph, Nicholas Mathew
To tackle a large midline diastema and generalized spacing existing before extraction often poses a challenge to the treating prosthodontist. The situation becomes even more complicated if the patient is a teenager, with multiple missing teeth, associated deep bite and where the jaw bone growth has not yet been completed. Possible treatment options would include a removable prosthesis, a fixed partial denture or an implant supported prosthesis. Treating such cases with a simple removable prosthesis cannot be justified if a deep bite existed which would result in posterior disocclusion...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28159340/force-to-failure-of-a-simulated-implant-supported-complete-fixed-dental-prosthesis-reinforced-with-glass-fiber
#9
Jack Goldberg, Gelareh Ronaghi, Jin-Ho Phark, Sajid Jivraj, Winston Chee
STATEMENT OF PROBLEM: The joint adjacent to the cantilevered section of an implant-supported complete fixed dental prosthesis (ICFDP) undergoes the most stress because of force magnification in this area, making it more prone to mechanical failure. PURPOSE: The purpose of this in vitro study was to evaluate the ultimate force-to-failure distal to the terminal implant of a simulated ICFDP reinforced with glass fiber compared with that of a conventionally fabricated prosthesis...
January 31, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28150188/customized-smartpeg-for-measurement-of-resonance-frequency-of-mini-dental-implants
#10
Jagjit Singh Dhaliwal, Rubens F Albuquerque, Ali Fakhry, Sukhbir Kaur, Jocelyne S Feine
BACKGROUND: One-piece narrow diameter implants (NDIs) have been recommended as "Single-tooth replacements in the anterior zones, single posterior, multiple-unit fixed dental prosthesis (FDP), edentulous jaws to be rehabilitated with FDP, and edentulous jaws rehabilitation with overdentures in situations with reduced mesiodistal space or reduced ridge width." (ITI consensus 2013). Since NDIs can be immediately loaded, it is important to be able to carry out stability testing. We developed and validated a customized SmartPeg for this type of implant to measure the Implant Stability Quotient (ISQ)...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28118782/initial-experience-with-xenograft-bioconduit-for-the-treatment-of-complex-prosthetic-valve-endocarditis
#11
Apostolos Roubelakis, Dimos Karangelis, Syed Sadeque, Bobby Yanagawa, Amit Modi, Clifford W Barlow, Steven A Livesey, Sunil K Ohri
INTRODUCTION: The treatment of complex prosthetic valve endocarditis (PVE) with aortic root abscess remains a surgical challenge. Several studies support the use of biological tissues to minimize the risk of recurrent infection. We present our initial surgical experience with the use of an aortic xenograft conduit for aortic valve and root replacement. METHODS: Between October 2013 and August 2015, 15 xenograft bioconduits were implanted for complex PVE with abscess (13...
January 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28114266/clinical-performance-of-narrow-diameter-titanium-zirconium-implants-a-systematic-review
#12
Zahi Badran, Xavier Struillou, Nicolas Strube, David Bourdin, Michel Dard, Assem Soueidan, Alain Hoornaert
PURPOSE: Implant-supported prosthetic rehabilitations are in constant augmentation in everyday dental practice. This is largely due to increasing demand from patients for fixed or implant-stabilized prosthesis, although they are frequently reticent to complex preimplant bone augmentation surgeries, whenever bone volume is lacking. Narrow-diameter implants (NDI; ≤3.5 mm) have been developed to offer relatively simple implant solutions in challenging bone-deficient sites. However, concerns regarding their mechanical properties have been raised...
January 19, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28095519/a-clinical-study-assessing-the-influence-of-anodized-titanium-and-zirconium-dioxide-abutments-and-peri-implant-soft-tissue-thickness-on-the-optical-outcome-of-implant-supported-lithium-disilicate-single-crowns
#13
Francisco Martínez-Rus, Marta Prieto, María P Salido, Cristina Madrigal, Mutlu Özcan, Guillermo Pradíes
PURPOSE: To assess the influence of anodized titanium and zirconium dioxide abutments and peri-implant soft tissue thickness on the optical outcome of implant-supported lithium disilicate single crowns. MATERIALS AND METHODS: Twenty patients with a missing maxillary single incisor, canine, or first premolar received an endosseous implant after a two-stage surgery protocol. After healing and soft tissue conditioning, peri-implant soft tissues were reproduced in the impression, and the thickness was measured...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28091447/prosthetic-rehabilitation-of-a-patient-with-a-resected-right-temporomandibular-joint
#14
M Dincel, H Kocaağaoğlu, H Ö Gümüş, H Albayrak
This case report presents the prosthodontic rehabilitation of a patient with a resected right mandible, caused by an accident. Right condyle, ramus, and the posterior part of ramus were affected by the accident. These structures were resected, and the mandible was positioned toward the surgical area and a facial asymmetry was occurred. The patient was treated with a bar-retained maxillar denture with a guide ramp and an implant-supported fixed mandibular prosthesis.
February 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28089330/finite-element-analysis-of-implant-assisted-removable-partial-dentures-framework-design-considerations
#15
Reza Shahmiri, Raj Das
STATEMENT OF PROBLEM: Connecting an acrylic resin base to both a metal framework and a rigidly fixed implant may affect the rotational displacement of the prosthesis during loading. PURPOSE: The purpose of this finite element analysis study was to analyze the effect of connecting a denture base metal framework to an implant with the aim of decreasing the rotational movement of an implant-assisted removable partial denture. MATERIAL AND METHODS: A mesial occlusal rest direct retainer and a distal occlusal rest direct retainer were modeled and adapted to incorporate a modified denture base metal framework in the connection area for each model...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28068622/tribological-behavior-of-ti6al4v-cellular-structures-produced-by-selective-laser-melting
#16
F Bartolomeu, M Sampaio, O Carvalho, E Pinto, N Alves, J R Gomes, F S Silva, G Miranda
Additive manufacturing (AM) technologies enable the fabrication of innovative structures with complex geometries not easily manufactured by traditional processes. Regarding metallic cellular structures with tailored/customized mechanical and wear performance aiming to biomedical applications, Selective Laser Melting (SLM) is a remarkable solution for their production. Focusing on prosthesis and implants, in addition to a suitable Young's modulus it is important to assess the friction response and wear resistance of these cellular structures in a natural environment...
January 4, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28066608/transcatheter-aortic-valve-implantation-tavi-versus-sutureless-aortic-valve-replacement-suavr-for-aortic-stenosis-a-systematic-review-and-meta-analysis-of-matched-studies
#17
Nelson Wang, Yi-Chin Tsai, Natasha Niles, Vakhtang Tchantchaleishvili, Marco Di Eusanio, Tristan D Yan, Kevin Phan
BACKGROUND: With improving technologies and an increasingly elderly populations, there have been an increasing number of therapeutic options available for patients requiring aortic valve replacement. Recent evidence suggests that transcatheter aortic valve implantation (TAVI) is one suitable option for high risk inoperable patients, as well as high risk operable patients. Sutureless valve technology has also been developed concurrently, with facilitates surgical aortic valve replacement (SUAVR) by allow resection and replacement of the native aortic valve with minimal sutures and prosthesis anchoring required...
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28065350/preoperative-urine-culture-results-correlate-poorly-with-bacteriology-of-urologic-prosthetic-device-infections
#18
Nicholas L Kavoussi, Jordan A Siegel, Boyd R Viers, Travis J Pagliara, Matthias D Hofer, Billy H Cordon, Nabeel Shakir, Jeremy M Scott, Allen F Morey
INTRODUCTION: Although preoperative negative urine culture results and treatment of urinary tract infections are generally advised before artificial urinary sphincter (AUS) and penile prosthesis (PP) surgery to prevent device infection, limited evidence exists to support this practice. AIM: To evaluate the relation between preoperative urine culture results and the bacteriology of prosthetic device infections. METHODS: Men undergoing AUS and/or PP placement at a tertiary referral center from 2007 through 2015 were analyzed...
January 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28060092/functional-reconstruction-of-nonsegmental-mandibular-defect-with-fresh-frozen-bone-graft-and-delayed-implants-placement
#19
Tommaso Bucci, Pier Francesco Nocini
The loss of teeth and the alveolar bone secondary to resection of mandibular tumors may lead to unfavorable esthetic and functional results with a significant impairment of mastication.The authors report a 53-year-old patient with recurrence of ameloblastoma who was submitted to marginal mandibulectomy. Bone defect was immediately reconstructed using fresh frozen bone graft and 9 months after reconstruction 3 dental implants were inserted in the grafted bone. After 6 months, dental rehabilitation was achieved using a fixed implant-supported prosthesis...
January 5, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28060024/stress-distribution-in-an-implant-supported-mandibular-complete-denture-using-different-cantilever-lengths-and-occlusal-coating-materials
#20
Rodrigo Antonio de Medeiros, Marcelo Coelho Goiato, Aldiéris Alves Pesqueira, Aljomar José Vechiato Filho, Liliane da Rocha Bonatto, Daniela Micheline Dos Santos
PURPOSE: The aim of this study was to assess stress distribution in the bone-implant interface of a mandibular implant-supported prosthesis with different cantilever lengths, aesthetic coating materials, and implant abutments. MATERIALS AND METHODS: A photoelastic model of an edentulous mandible, containing 5 external hexagon implants, was constructed. Experimental models were divided into 6 groups: group 1-UCLA component and metal bar; group 2-UCLA component and acrylic resin coating; group 3-UCLA component and porcelain coating; group 4-abutment and metal bar; group 5-abutment and acrylic resin coating; and group 6-abutment and porcelain coating...
February 2017: Implant Dentistry
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