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https://www.readbyqxmd.com/read/28343671/cytotoxicity-and-proinflammatory-cytokine-expression-induced%C3%A2-by-interim-resin-materials-in-primary-cultured-human%C3%A2-dental-pulp-cells
#1
Jung-Hwan Lee, Soo-Kyung Jun, Ho-Jin Moon, Hae-Hyoung Lee
STATEMENT OF PROBLEM: Acrylic resin materials for interim restoration may adversely affect pulp tissue during the polymerization phase. PURPOSE: The purpose of this in vitro study was to determine the cytotoxic and proinflammatory cytokine production effects induced by interim resin materials in primary cultured human dental pulp cells (hDPCs). MATERIAL AND METHODS: Five interim resin materials were evaluated: 3 types of chemically activated products, 1 light-activated product, and 1 computer-aided design and computer-aided manufacturing (CAD-CAM) product...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28343651/reconstruction-of-large-cranial-defects-with-poly-methyl-methacrylate-pmma-using-a-rapid-prototyping-model-and-a-new-technique-for-intraoperative-implant-modeling
#2
Claudia Unterhofer, Christoph Wipplinger, Michael Verius, Wolfgang Recheis, Claudius Thomé, Martin Ortler
BACKGROUND: Reconstruction of large cranial defects after craniectomy can be accomplished by free-hand poly-methyl-methacrylate (PMMA) or industrially manufactured implants. The free-hand technique often does not achieve satisfactory cosmetic results but is inexpensive. In an attempt to combine the accuracy of specifically manufactured implants with low cost of PMMA. METHODS: Forty-six consecutive patients with large skull defects after trauma or infection were retrospectively analyzed...
March 10, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28343087/cad-cam-machining-vs-pre-sintering-in-lab-fabrication-techniques-of-y-tzp-ceramic-specimens-effects-on-their-mechanical-fatigue-behavior
#3
C P Zucuni, L F Guilardi, S Fraga, L G May, G K R Pereira, L F Valandro
This study evaluated the effects of different pre-sintering fabrication processing techniques of Y-TZP ceramic (CAD/CAM Vs. in-lab), considering surface characteristics and mechanical performance outcomes. Pre-sintered discs of Y-TZP ceramic (IPS e.max ZirCAD, Ivoclar Vivadent) were produced using different pre-sintering fabrication processing techniques: Machined- milling with a CAD/CAM system; Polished- fabrication using a cutting device followed by polishing (600 and 1200 SiC papers); Xfine- fabrication using a cutting machine followed by grinding with extra-fine diamond bur (grit size 30 μm); Fine- fabrication using a cutting machine followed by grinding with fine diamond bur (grit size 46 μm); SiC- fabrication using a cutting machine followed by grinding with 220 SiC paper...
March 18, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28341253/digital-workflow-for-a-dental-prosthesis-that-considers-lateral-mandibular-relation
#4
Ji-Hyun Park, Jong-Eun Kim, June-Sung Shim
Most digital prosthesis designs consider only the maximal intercuspal position (MIP) and not the lateral movement. During the computer-aided design and computer-aided manufacture (CAD-CAM) prosthesis delivery process, the clinician has to adjust the prosthesis to avoid occlusal interference during lateral excursion. The novel digital workflow described in this report can be divided into 2 steps. After obtaining interocclusal records for the MIP and the lateral excursion position, the crown CAD data were designed using a general digital workflow considering only the MIP...
March 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28337986/simultaneous-treatment-of-temporomandibular-joint-ankylosis-with-severe-mandibular-deficiency-by-standard-tmj-prosthesis
#5
YiHui Hu, LuZhu Zhang, DongMei He, Chi Yang, MinJie Chen, ShanYong Zhang, Hui Li, Edward Ellis Iii
Temporomandibular joint (TMJ) ankylosis is a refractory disease that is difficult to predictably treat. This study evaluated the prognosis of using standard alloplastic TMJ prostheses for the treatment of TMJ ankylosis in Chinese patients with severe mandibular deficiency. Patients treated from 2013 to 2015 were reviewed. The computer-aided design and manufacture (CAD/CAM) technique was used to guide bony mass removal and locate the TMJ prosthesis (Biomet, USA). Eleven patients were included in this study. All prostheses were successfully installed and stabilized intraoperatively...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28326203/esthetic-rehabilitation-of-anterior-teeth-with-copy-milled-restorations-a-report-of-two-cases
#6
Sapna Rani, Jyoti Devi, Chandan Jain, Parul Mutneja, Mahesh Verma
Digitalization has become part and parcel of contemporary prosthodontics with the probability of most of the procedures being based on the digital techniques in the near future. This digital revolution started in the latter half of the 20th century by converting analog objects/signals into digital bits and bytes. Recent developments in all-ceramic materials and systems of computer-aided designing and computer-aided manufacturing (CAD/CAM), copy milling, and so forth offer excellent esthetics and superb biocompatibility...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28321342/presurgical-cone-beam-computed-tomography-bone-quality-evaluation-for-predictable-immediate-implant-placement-and-restoration-in-esthetic-zone
#7
Corina Marilena Cristache
Despite numerous advantages over multislice computed tomography (MSCT), including a lower radiation dose to the patient, shorter acquisition times, affordable cost, and sometimes greater detail with isotropic voxels used in reconstruction, allowing precise measurements, cone beam computed tomography (CBCT) is still controversial regarding bone quality evaluation. This paper presents a brief review of the literature on accuracy and reliability of bone quality assessment with CBCT and a case report with step-by-step predictable treatment planning in esthetic zone, based on CBCT scans which enabled the clinician to evaluate, depending on bone volume and quality, whether immediate restoration with CAD-CAM manufactured temporary crown and flapless surgery may be a treatment option...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28319213/comparison-of-the-marginal-fit-of-cobalt-chromium-metal-ceramic-crowns-fabricated-by-cad-cam-techniques-and-conventional-methods-at-three-production-stages
#8
Francisco Real-Voltas, Elisabeth Romano-Cardozo, Oscar Figueras-Alvarez, Magi Brufau-de Barbera, Josep Cabratosa-Termes
PURPOSE: The aim of this study was to compare the marginal fit of cobalt-chromium crowns fabricated using conventional casts and computer-aided design/computer-assisted manufacturing (CAD/CAM) techniques at three stages of production: metal coping, after porcelain firing, and after cementation. MATERIALS AND METHODS: A total of 80 metal-ceramic crowns were fabricated using four different techniques: lost wax casting, milling, laser sintering, and milling of a presintered metal block...
March 20, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28318927/classical-versus-custom-orbital-wall-reconstruction-selected-factors-regarding-surgery-and-hospitalization
#9
Rafał Zieliński, Marta Malińska, Marcin Kozakiewicz
PURPOSE: Nowadays, in orbital wall reconstruction, maxillofacial surgeons have the possibility to treat patients in modern ways such as with individual implants. Nevertheless, conventional treatment including standard titanium mesh shaped during the surgical procedure is also widely used. The aim of this study was to compare the above methods of orbital wall reconstructions. MATERIALS AND METHODS: In the first group (39 cases), patients were treated by means of computer-aided design/computer-aided manufacturing (CAD/CAM) milled individual implants made of ultra-high-molecular-weight polyethylene, dioxide zirconium and rapid prototyping titanium mesh pre-bent on an ABS model made by a three-dimensional (3D) printer...
February 17, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28318156/-comparative-evaluation-of-the-marginal-accuracy-of-single-crowns-fabricated-computer-using-aided-design-computer-aided-manufacturing-methods-self-curing-resin-and-luxatemp
#10
Yuan Jianming, Tang Ying, Pan Feng, Xu Weixing
OBJECTIVE: This study aims to compare the marginal accuracy of single crowns fabricated using self-curing resin, Luxatemp, and computer aided design/computer aided manufacturing (CAD/CAM) methods in clinical application. METHODS: A total of 30 working dies, which were obtained from 30 clinical teeth prepared with full crown as standard, were created and made into 30 self-curing resin, Luxatemp, and CAD/CAM single crowns. The restorations were seated on the working dies, and stereomicroscope was used to observe and measure the thickness of reference points...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28316122/digital-workflow-for-fixed-implant-rehabilitation-of-an-extremely-atrophic-edentulous-mandible-in-three-appointments
#11
Panos Papaspyridakos, Neha Rajput, Yukio Kudara, Hans-Peter Weber
OBJECTIVE: To present a rationale to reduce treatment complexity, number of surgeries, and overall treatment time for patients with extreme mandibular ridge deficiency. CLINICAL CONSIDERATIONS: A 67-year-old fully edentulous male presented with a chief complaint of poor retention and stability of the mandibular complete denture with consequent discomfort and inability to chew. A novel 3-appointment protocol from guided implant placement to definitive prosthesis delivery was implemented...
March 18, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28298996/in-vivo-evaluation-of-three-dimensional-of-volumetric-changes-using-a-cad-cam-chair-side-system-technical-procedure
#12
Rubén Agustín-Panadero, Alberto Ferreiroa, Agustín Pascual-Moscardó, Antonio Fons-Font, María-Fernanda Solá-Ruíz
An intraoral digital scanner in combination with specialized three-dimensional surface analysis software monitors volumetric changes to soft tissues or dental restorations. This technology can evaluate the success of a specific technique or medium- or long-term clinical outcomes in both clinical and research situations. This article describes how this technology was used to provide immediate chair-side data analysis without the help of specialized laboratory support. Key words:Intraoral scanner, CAD-CAM, best fit-method, surface tessellation language...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28296983/comparing-the-fracture-resistance-of-alternatively-engineered-zirconia-abutments-with-original-equipment-manufactured-abutments-with-different-implant-connection-designs
#13
Joseph M Jarman, Techkouhie Hamalian, Anthony P Randi
PURPOSE: Aftermarket computer-aided design/computer-assisted manufacture (CAD/CAM) milled zirconia (Zr) abutments were recently introduced with minimal independent research regarding their fracture resistance. Third-party manufacturers often alter the original equipment manufacturers' (OEM) design with unknown effects on fracture resistance. These alterations include elimination of the titanium insert with subsequent introduction of Zr into the implant, changes to connection designs and shapes, and/or alterations to prosthetic screw design...
March 15, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28294204/investigations-on-the-accuracy-of-3d-printed-drill-guides-for-dental-implantology
#14
André Neumeister, Linda Schulz, Christoph Glodecki
This article describes the computer-aided design/computer-aided manufacture (CAD/CAM) accuracy of dental drill guides for application in guided surgery. Today, the availability of three-dimensional (3D) desktop printers allows for the cost-effective production of drill guides by dental laboratories. Our investigations show the accuracy of produced guides by eliminating influencing factors that exist in the guided surgery workflow. To investigate this accuracy, a method was developed to evaluate the CAD/CAM production technology apart from sources of error from cone beam computed tomography (CBCT) scans, intraoral scans, software or human error...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28291855/guided-immediate-implant-placement-with-wound-closure-by-computer-aided-design-computer-assisted-manufacture-sealing-socket-abutment-case-report
#15
Gary Finelle, Sang J Lee
Digital technology has been widely used in the field of implant dentistry. From a surgical standpoint, computer-guided surgery can be utilized to enhance primary implant stability and to improve the precision of implant placement. From a prosthetic standpoint, computer-aided design/computer-assisted manufacture (CAD/CAM) technology has brought about various restorative options, including the fabrication of customized abutments through a virtual design based on computer-guided surgical planning. This case report describes a novel technique combining the use of a three-dimensional (3D) printed surgical template for the immediate placement of an implant, with CAD/CAM technology to optimize hard and soft tissue healing after bone grafting with the use of a socket sealing abutment...
March 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28280997/shear-bond-wettability-and-afm-evaluations-on-co2-laser-irradiated-cad-cam-ceramic-surfaces
#16
Ahmed El Gamal, Etienne Medioni, Jean Paul Rocca, Carlo Fornaini, Omid H Muhammad, Nathalie Brulat-Bouchard
The purpose of this study is to determine the CO2 laser irradiation in comparison with sandblasting (Sb), hydrofluoric acid (Hf) and silane coupling agent (Si) on shear bond strength (SBS), roughness (Rg) and wettability (Wt) of resin cement to CAD/CAM ceramics. Sixty (CAD/CAM) ceramic discs were prepared and distributed into six different groups: group A, control lithium disilicate (Li); group B, control zirconia (Zr); group C, Li: CO2/HF/Si; group D, Li: HF/Si; group E, Zr: CO2/Sb/Si; group F, Zr: Sb/Si. Result showed significant difference between irradiated and non-irradiated in terms of shear bond strength for zirconia ceramics (p value = 0...
March 9, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28274033/an-in-vitro-comparative-stereomicroscopic-analysis-and-evaluation-of-marginal-accuracy-in-porcelain-fused-to-metal-copings-fabricated-in-two-different-finish-lines-using-variant-die-materials
#17
Priya L Vaswani, Pronob K Sanyal, Siddharth Y Gosavi, Abhijeet R Kore
INTRODUCTION: Limited published information is available about the influence of preparatory designs and die materials on marginal accuracy of porcelain fused to metal copings using recently developed die materials. AIM: To detect the influence of margin geometries and dimensional accuracy of contemporary die materials on vertical marginal gaps in Porcelain fused to metal coping using a Stereomicroscope (three dimensional analysis). MATERIALS AND METHOD: Two chrome cobalt alloy models of mandibular first molars prepared to have shoulder and deep chamfer finish lines were CAD-CAM milled...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28273692/the-extent-and-scope-of-prosthodontic-practice-in-iowa
#18
Ronald L Ettinger, Zachary S Goettsche, Fang Qian
PURPOSE: The purpose of this questionnaire was to ask general dentists in private practice in the state of Iowa about the extent and scope of their prosthodontic practice. MATERIALS AND METHODS: A 22-item questionnaire was developed and tested on 5 general dentists. The Iowa Dental Association agreed to electronically distribute the survey to all general practice dentists in their database. After three rounds, a total of 289 responses were received from the 996 general dentists in the database...
March 8, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28267825/clinical-monitoring-of-tooth-wear-progression-in-patients-over-a-period-of-one-year-using-cad-cam
#19
Khaled E Ahmed, John Whitters, Xiangyang Ju, S Gareth Pierce, Charles N MacLeod, Colin A Murray
PURPOSE: The aim of this study was to clinically monitor the progression of tooth wear over a period of 1 year in a cohort of referred tooth wear patients through the use of a computer-aided design/computer-assisted manufacture (CAD/CAM) scanner and a standardized scanning/assessment methodology. MATERIALS AND METHODS: Polyether impressions were made of 11 participants (130 teeth) at baseline and at 1 year. Impressions were poured in type IV dental stone and the anterior teeth were 3D scanned...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28267817/evaluation-of-currently-available-cad-cam-denture-systems
#20
Patricia-Anca Steinmassl, Florian Klaunzer, Otto Steinmassl, Herbert Dumfahrt, Ingrid Grunert
PURPOSE: The introduction of computer-aided design/computer-assisted manufacture (CAD/CAM) technology into removable denture prosthodontics enables denture adaptation in fewer patient visits, an advantage that appeals to dentists and patients. Since manufacturers follow very different approaches, an evaluation of the different clinical CAD/CAM complete denture fabrication protocols is desirable. The aim of this article is to assess and evaluate the different clinical fabrication protocols of currently available CAD/CAM denture systems to provide decision support for dental practitioners...
March 2017: International Journal of Prosthodontics
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