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Dental fatigue

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https://www.readbyqxmd.com/read/28508937/the-prevalence-of-oropharyngeal-dysphagia-in-adults-presenting-with-temporomandibular-disorders-associated-with-rheumatoid-arthritis-a-systematic-review-and-meta-analysis
#1
REVIEW
Órla Gilheaney, Lina Zgaga, Isolde Harpur, Greg Sheaf, Liss Kiefer, Sibylle Béchet, Margaret Walshe
Temporomandibular disorders (TMDs) are the most frequent non-dental orofacial pain disorders and may be associated with rheumatoid arthritis (RA), resulting in oropharyngeal dysphagia (OD). However, clinicians' understanding of involvement with OD caused by RA-related TMDs is limited and the methodological quality of research in this field has been criticised. Therefore, the aim of this study was to systematically review the prevalence of oral preparatory and oral stage signs and symptoms of OD in adults presenting with TMDs associated with RA...
May 16, 2017: Dysphagia
https://www.readbyqxmd.com/read/28494273/fatigue-failure-load-of-monolithic-y-tzp-three-unit-fixed-dental-prostheses-effect-of-grinding-at-the-gingival-zone-of-the-connector
#2
Marina Amaral, Regina F Villefort, Renata Marques Melo, Gabriel K R Pereira, Yu Zhang, Luiz Felipe Valandro, Marco Antonio Bottino
OBJECTIVES: To determine the fatigue failure loads of three-unit monolithic zirconia fixed dental prosthesis (FDPs) before and after grinding of the gingival areas of connectors with diamond burs. MATERIAL AND METHODS: FDPs were milled from pre-sintered blocks of zirconia simulating the absence of the first mandibular molar. Half of the specimens were subjected to grinding, simulating clinical adjustment, and all of them were subjected to glazing procedure. Additional specimens were manufactured for roughness analysis...
March 7, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28494037/effect-of-abutment-preparation-and-fatigue-loading-in-a-moist-environment-on-the-fracture-resistance-of-the-one-piece-zirconia-dental-implant
#3
Mohamed Kamel, Tritala K Vaidyanathan, Robert Flinton
PURPOSE: One-piece zirconia dental implants have been widely used in Europe for many years. This in vitro study was done to evaluate the effect of abutment preparation and fatigue (cyclic) loading in a moist environment on the fracture resistance of the one-piece zirconia dental implant. MATERIALS AND METHODS: Twenty-four Cera Root zirconium oxide dental implants, divided into three groups of eight, were used in this study: group 1 (control group): implants with no preparation, tested in a dry environment; group 2: implants with no preparation, tested in a moist environment (simulating clinical conditions); and group 3: implants after abutment preparation tested in a moist environment...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28476464/environmental-temperature-drastically-affects-flexural-fatigue-resistance-of-nickel-titanium-rotary-files
#4
Nicola Maria Grande, Gianluca Plotino, Enrico Silla, Eugenio Pedullà, Gustavo DeDeus, Gianluca Gambarini, Francesco Somma
INTRODUCTION: The aim of the present study was to analyze how a low environmental temperature can affect the fatigue life of instruments made by different types of heat-treated nickel-titanium alloys. METHODS: The flexural cyclic fatigue of 40 new specimens for each of the following systems was tested for cyclic fatigue resistance: ProTaper Universal F2 (Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Gold F2 (Dentsply Tulsa Dental Specialties, Tulsa, OK), Twisted Files SM2 (SybronEndo, Orange, CA), Mtwo #25...
May 2, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28467256/stress-strain-analysis-of-premolars-with-non-carious-cervical-lesions-influence-of-restorative-material-loading-direction-and-mechanical-fatigue
#5
A C Machado, C J Soares, B R Reis, A A Bicalho, Lha Raposo, P V Soares
Noncarious cervical lesions (NCCLs) are characterized by a loss of dental structure at the cementoenamel junction (CEJ) caused by stress, biocorrosion, and attrition. Variations in occlusal loading can promote different stress and strain patterns on the CEJ. Restoration of NCCLs is part of lesion management; however, there is still no conclusive restorative protocol for NCCLs. This study aimed to evaluate the stress and strain distribution of maxillary premolars with NCCLs according to three factors: 1) restorative technique; 2) direction of occlusal loading; and 3) mechanical fatigue...
May 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28459248/frontline-temporomandibular-joint-orofacial-pain-therapy-for-every-dental-practice
#6
Lisa Germain, Louis Malcmacher
Temporomandibular disorders (TMD) are a group of conditions affecting the temporomandibular joint and/or muscles of mastication. TMD may present along with many comorbid pain syndromes such as myofascial pain, headache, and neck and back stiffness with limited range of motion, as well as fibromyalgia and chronic fatigue syndrome. The diagnosis and management of TMD is complex and, many times, multidisciplinary. However, dentists can provide their patients with frontline temporomandibular/orofacial pain therapy with didactic and hands-on training that provides a better understanding and a conservative approach for treatment of TMDs...
May 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28442122/the-effect-of-temperature-on-cyclic-fatigue-of-nickel-titanium-rotary-endodontic-instruments
#7
Amandeep Dosanjh, Susan Paurazas, Mazin Askar
INTRODUCTION: This study examined the effect of different temperatures on the cyclic fatigue of nickel-titanium rotary files. METHODS: Three groups of nickel-titanium rotary files (EF group [EdgeFile; EdgeEndo, Albuquerque, NM], VB group [Vortex Blue; Dentsply Tulsa Dental Specialties, Tulsa, OK], and ESX group [ESX; Brasseler USA, Savannah, GA]) of size 25 with a .04 taper and 25-mm length were tested in a metal block that simulated a canal curvature of 60° and a 5-mm radius curvature...
May 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28427837/in-vitro-fatigue-tests-and-in-silico-finite-element-analysis-of-dental-implants-with-different-fixture-abutment-joint-types-using-computer-aided-design-models
#8
Satoshi Yamaguchi, Yasufumi Yamanishi, Lucas S Machado, Shuji Matsumoto, Nick Tovar, Paulo G Coelho, Van P Thompson, Satoshi Imazato
PURPOSE: The aim of this study was to evaluate fatigue resistance of dental fixtures with two different fixture-abutment connections by in vitro fatigue testing and in silico three-dimensional finite element analysis (3D FEA) using original computer-aided design (CAD) models. METHODS: Dental implant fixtures with external connection (EX) or internal connection (IN) abutments were fabricated from original CAD models using grade IV titanium and step-stress accelerated life testing was performed...
April 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28416307/the-efficacy-of-the-waveone-reciprocating-file-system-versus-the-protaper-retreatment-system-in-endodontic-retreatment-of-two-different-obturating-techniques
#9
Ben Jorgensen, Anne Williamson, Rene Chu, Fang Qian
INTRODUCTION: This ex vivo study aimed to evaluate the efficacy of retreating GuttaCore (Dentsply Tulsa Dental Specialties, Tulsa, OK) and warm vertically condensed gutta-percha in moderately curved canals with 2 different systems: ProTaper Universal Retreatment (Dentsply Tulsa Dental) and WaveOne (Dentsply Tulsa Dental). METHODS: Eighty mesial roots of mandibular molars were used in this study. The mesiobuccal canals in each sample were prepared to length with the WaveOne Primary file (Dentsply Tulsa Dental)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28415466/effect-of-lubricant-on-the-reliability-of-dental-implant-abutment-screw-joint-an-in-vitro-laboratory-and-three-dimension-finite-element-analysis
#10
Tingting Wu, Hongyi Fan, Ruiyang Ma, Hongyu Chen, Zhi Li, Haiyang Yu
Biomechanical factors play a key role in the success of dental implants. Fracture and loosening of abutment screws are major issues. This study investigated the effect of lubricants on the stability of dental implant-abutment connection. As lubricants, graphite and vaseline were coated on the abutment screw surface, respectively, and a blank without lubricant served as the control. The total friction coefficient (μtot), clamping force, fatigue behavior and detorque of the joint combined with dynamic cyclic loading were measured under different lubricating conditions...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28383117/an-alternative-prosthetic-approach-for-rehabilitation-of-two-edentulous-maxillectomy-patients-clinical-report
#11
Murat Yenisey, Şafak Külünk, Necati Kaleli
Obturator prosthesis is a common treatment method for maxillectomy patients for maintaining their oronasal separation and resuming their social lives. After tumor resection, the remaining anatomical structures have a significant effect on prosthesis retention. The present study describes the rehabilitation of two maxillectomy patients after cancer surgery using a prosthesis consisting of a denture and a special retentive obturator that is positioned in the anatomical undercuts of the nasal cavity. These patients have undergone total and subtotal maxillectomy surgery after the diagnosis of squamous cell carcinoma...
April 6, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28365541/fracture-strength-and-probability-of-survival-of-narrow-and-extra-narrow-dental-implants-after-fatigue-testing-in-vitro-and-in-silico-analysis
#12
Dimorvan Bordin, Edmara T P Bergamo, Vinicius P Fardin, Paulo G Coelho, Estevam A Bonfante
PURPOSE: To assess the probability of survival (reliability) and failure modes of narrow implants with different diameters. MATERIALS AND METHODS: For fatigue testing, 42 implants with the same macrogeometry and internal conical connection were divided, according to diameter, as follows: narrow (Ø3.3×10mm) and extra-narrow (Ø2.9×10mm) (21 per group). Identical abutments were torqued to the implants and standardized maxillary incisor crowns were cemented and subjected to step-stress accelerated life testing (SSALT) in water...
March 27, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28283891/the-potential-role-for-early-biomarker-testing-as-part-of-a-modern-multidisciplinary-approach-to-sj%C3%A3-gren-s-syndrome-diagnosis
#13
REVIEW
Kenneth A Beckman, Jodi Luchs, Mark S Milner, Julian L Ambrus
Sjögren's syndrome (SS) is a chronic and progressive multisystem autoimmune disease typically managed by rheumatologists. Diagnostic delays are common, due in large part to the non-specific and variable nature of SS symptoms and the slow progression of disease. The hallmark characteristics of SS are dry eye and dry mouth, but there are a broad range of other possible symptoms such as joint and muscle pain, skin rashes, chronic dry cough, vaginal dryness, extremity numbness or tingling, and disabling fatigue...
March 10, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28258266/effect-of-newly-developed-resin-cements-and-thermocycling-on-the-strength-of-porcelain-laminate-veneers
#14
Fawaz I Alqahtani
AIM: The aim of this study was to determine the effect of different luting cements and accelerated artificial aging (AAA) in the fracture resistance of porcelain laminate veneers (PLVs). MATERIALS AND METHODS: A total of 80 disc-shaped specimens were prepared using computer-aided design/computer-aided milling technology from lithium disilicate glass-ceramic blocks. Specimens (0.5 mm thick, 10 mm diameter) were divided into eight groups of 10 specimens per group...
March 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28243433/a-rare-case-of-fusobacterium-necrophorum-liver-abscesses
#15
Faris Hannoodi, Hussam Sabbagh, Zain Kulairi, Sarwan Kumar
Liver abscesses are an uncommon disease that can present with vague symptoms. Fusobacterium necrophorum causing liver abscesses is a rare condition and only a few cases have been reported. An 88-year-old female presented to her primary care physician with one week of fevers, night sweats, chills, fatigue and vague right upper quadrant abdominal pain. She denied nausea, vomiting, constipation, diarrhea and unintentional weight loss. A computed tomography scan of the abdomen showed two liver abscesses in the right lobe as well as extensive diverticulosis...
January 11, 2017: Clinics and Practice
https://www.readbyqxmd.com/read/28222907/fatigue-testing-of-biomaterials-and-their-interfaces
#16
Dwayne Arola
OBJECTIVE: The objective of this article is to describe the importance of fatigue to the success of restorative dentistry, with emphasis on the methods for evaluating the fatigue properties of materials in this field, and the durability of their bonded interfaces. METHODS: The stress-life fatigue and fatigue crack growth approaches for evaluating the fatigue resistance of dental biomaterials are introduced. Emphasis is placed on in vitro studies of the hard tissue foundation, restorative materials and their bonded interfaces...
February 17, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28218957/cyclic-fatigue-resistance-of-a-novel-rotary-file-manufactured-using-controlled-memory-ni-ti-technology-compared-to-a-file-made-from-m-wire-file
#17
E Alshwaimi
AIM: To compare the cyclic fatigue properties of a novel file made using controlled memory NiTi technology with those of files made from M-wire. METHODOLOGY: Twelve files with similar cross-sectional geometry and tip size from each of the following groups were tested: Proflexendo made from CMT (PE; size 30 .04) (Nexden, Houston, Tx, USA), ProFile Vortex made from M-wire (PV; size 30 .04) (Dentsply Tulsa Dental, Tulsa, OK, USA), and ProTaper Universal made from regular alloy (PU; F3) (Dentsply Tulsa Dental)...
February 20, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28216845/analysis-of-helkimo-index-for-temporomandibular-disorder-diagnosis-in-the-dental-students-of-faridabad-city-a-cross-sectional-study
#18
Sapna Rani, Salil Pawah, Sunil Gola, Mansha Bakshi
AIM AND OBJECTIVES: The aim of the study was to evaluate the prevalence of temporomandibular disorder (TMD) by the use of Helkimo's index (anamnestic [Ai] and clinical dysfunction [Di] component) in the nonpatient population (dental students) of Faridabad college. SETTINGS AND DESIGN: A questionnaire-based survey was carried out among students of dental college for signs and symptoms of TMD and also clinical examination was done. The results were scored and according to scoring severity of TMD were assessed in the specified population...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28190587/influence-of-cyclic-flexural-deformation-on-the-torsional-resistance-of-controlled-memory-and-conventional-nickel-titanium-instruments
#19
Eufemia Carolina Peláez Acosta, Pedro Damas Resende, Isabella Faria da Cunha Peixoto, Érika Sales Joviano Pereira, Vicente Tadeu Lopes Buono, Maria Guiomar de Azevedo Bahia
INTRODUCTION: The aim of this study was to evaluate the influence of cyclic deformation on the torsional resistance of controlled memory (CM) nickel-titanium files in comparison with superelastic (SE) instruments with similar geometric and dimensional characteristics. METHODS: New 30/.06 HyFlex (HF; Coltene/Whaledent, Inc, Cuyahoga Falls, OH), Typhoon (Clinician's Choice Dental Products, New Milford, CT), RaCe (FKG, La-Chaux De Fonds, Switzerland), and ProTaper Universal F2 instruments (F2; Dentsply Maillefer, Ballaigues, Switzerland) were assessed...
April 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28187320/mechanical-and-biological-behavior-of-ultrafine-grained-ti-alloy-aneurysm-clip-processed-using-high-pressure-torsion
#20
Ho Yong Um, Byung Ho Park, Dong-Hyun Ahn, Mohamed Ibrahim Abd El Aal, Jaechan Park, Hyoung Seop Kim
Severe plastic deformation (SPD) has recently been advanced as the main process for fabricating bulk ultrafine grained or nanocrystalline metallic materials, which present much higher strength and better bio-compatibility than coarse-grained counterparts. Medical devices, such as aneurysm clips and dental implants, require high mechanical and biological performance (e.g., stiffness, yield strength, fatigue resistance, and bio-compatibility). These requirements match well the characteristics of SPD-processed materials...
February 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
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