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Journal of Advanced Prosthodontics

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https://www.readbyqxmd.com/read/30140401/evaluation-of-the-reproducibility-of-various-abutments-using-a-blue-light-model-scanner
#1
Dong-Yeon Kim, Kyung-Eun Lee, Jin-Hun Jeon, Ji-Hwan Kim, Woong-Chul Kim
PURPOSE: To evaluate the reproducibility of scan-based abutments using a blue light model scanner. MATERIALS AND METHODS: A wax cast abutment die was fabricated, and a silicone impression was prepared using a silicone material. Nine study dies were constructed using the prepared duplicable silicone, and the first was used as a reference. These dies were classified into three groups and scanned using a blue light model scanner. The first three-dimensional (3D) data set was obtained by scanning eight dies separately in the first group...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140400/a-study-on-the-machining-accuracy-of-dental-digital-method-focusing-on-dental-inlay
#2
Eun-Jeong Bae, Il-Do Jeong, Woong-Chul Kim, Ji-Hwan Kim
PURPOSE: The purpose of this study was to compare the cutting method and the lamination method to investigate whether the CAD data of the proposed inlay shape are machined correctly. MATERIALS AND METHODS: The Mesial-Occlusal shape of the inlay was modeled by changing the stereolithography (STL). Each group used SLS (metal powder) or SLA (photocurable resin) in the additive method, and wax or zirconia in the subtractive method (n=10 per group, total n=40). Three-dimensional (3D) analysis program (Geomagic Control X inspection software; 3D systems) was used for the alignment and analysis...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140399/polish-of-interface-areas-between-zirconia-silicate-ceramic-and-composite-with-diamond-containing-systems
#3
Philipp-Cornelius Pott, Johannes Philipp Hoffmann, Meike Stiesch, Michael Eisenburger
PURPOSE: Fractures, occlusal adjustments, or marginal corrections after removing excess composite cements result in rough surfaces of all-ceramic FPDs. These have to be polished to prevent damage of the surrounding tissues. The aim of this study was to evaluate the roughness of zirconia, silicate-ceramic, and composite after polish with different systems for intraoral use. MATERIALS AND METHODS: Each set of 50 plates was made of zirconia, silicate-ceramic, and composite...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140398/influence-of-nonthermal-argon-plasma-on-the-shear-bond-strength-between-zirconia-and-different-adhesives-and-luting-composites-after-artificial-aging
#4
Philipp-Cornelius Pott, Timo-Sebastian Syväri, Meike Stiesch, Michael Eisenburger
PURPOSE: Plasma activation of hydrophobic zirconia surfaces might be suitable to improve the bond strength of luting materials. The aim of this study was to analyze the influence of nonthermal argon-plasma on the shear bond strength (SBS) between zirconia and different combinations of 10-MDP adhesive systems and luting composites after artificial aging. MATERIALS AND METHODS: Two hundred forty Y-TZP specimens were ground automatically with 165 µm grit and water cooling...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140397/-in-vitro-performance-and-fracture-resistance-of-novel-cad-cam-ceramic-molar-crowns-loaded-on-implants-and-human-teeth
#5
Verena Preis, Sebastian Hahnel, Michael Behr, Martin Rosentritt
PURPOSE: To investigate the fatigue and fracture resistance of computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic molar crowns on dental implants and human teeth. MATERIALS AND METHODS: Molar crowns (n=48; n=8/group) were fabricated of a lithium-disilicate-strengthened lithium aluminosilicate glass ceramic (N). Surfaces were polished (P) or glazed (G). Crowns were tested on human teeth (T) and implant-abutment analogues (I) simulating a chairside (C, crown bonded to abutment) or labside (L, screw channel) procedure for implant groups...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140396/the-effect-of-light-sources-and-cad-cam-monolithic-blocks-on-degree-of-conversion-of-cement
#6
Aydan Boztuna Çetindemir, Bülent Şermet, Değer Öngül
PURPOSE: To assess the degree of conversion (DC) and light irradiance delivered to light-cured and dual-cured cements by application of different light sources through various types of monolithic computer-aided design and computer-aided manufacturing (CAD/CAM) materials. MATERIALS AND METHODS: RelyX Ultimate Clicker light-cured and dual-cured resin cement specimens with 1.5-mm thicknesses (n=300, 10/group), were placed under four types of crystalline core structure (Vita Enamic, Vita Suprinity, GC Ceresmart, Degudent Prettau Anterior)...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140395/influence-of-the-amount-of-tooth-surface-preparation-on-the-shear-bond-strength-of-zirconia-cantilever-single-retainer-resin-bonded-fixed-partial-denture
#7
Charles-Ellie Sillam, Sibel Cetik, Thai Hoang Ha, Ramin Atash
PURPOSE: Conventional resin-bonded fixed partial dentures (RBFPDs) are usually made with a two-retainer design. Unlike conventional RBFPDs, cantilever resin-bonded fixed partial dentures (Cantilever RBFPDs) are, for their part, made with a single-retainer design. The aim of this study was to compare the effect of tooth surface preparation on the bond strength of zirconia cantilever single-retainer RBFPDs. The objective is to evaluate the shear bond strength of these single-retainer RBFPDs bonded on 3 different amount of tooth surface preparation...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140394/the-accuracy-of-a-3d-printing-surgical-guide-determined-by-cbct-and-model-analysis
#8
Boyoung Ma, Taeseok Park, Inkon Chun, Kwidug Yun
PURPOSE: The aim of this clinical study was to assess the accuracy of the implants placed using a universal digital surgical guide. MATERIALS AND METHODS: Among 17 patients, 28 posterior implants were included in this study. The digital image of the soft tissue acquired from cast scan and hard tissue from CBCT have been superimposed and planned the location, length, diameter of the implant fixture. Then digital surgical guides were created using 3D printer. Each of angle deviations, coronal, apical, depth deviations of planned and actually placed implants were calculated using CBCT scans and casts...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140393/surface-deterioration-of-monolithic-cad-cam-restorative-materials-after-artificial-abrasive-toothbrushing
#9
Nazmiye Şen, Betül Tuncelli, Gültekin Göller
PURPOSE: The purpose of this in vitro study was to evaluate the effect of abrasive toothbrushing on the surface properties of monolithic computer-assisted design and computer-assisted manufacturing (CAD/CAM) materials stored in food-simulating liquids (FSLs). MATERIALS AND METHODS: Fourty-eight disk-shaped test specimens of each material (Paradigm MZ100/PMZ, Lava Ultimate/LU, Vita Enamic/VE, and Vita Mark II/VMII) with a diameter of 10.0 mm and a thickness of 3...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140392/accuracy-of-new-implant-impression-technique-using-dual-arch-tray-and-bite-impression-coping
#10
Shin-Eon Lee, Sung-Eun Yang, Cheol-Won Lee, Won-Sup Lee, Su Young Lee
PURPOSE: The purpose of this in vitro study was to evaluate the accuracy of a new implant impression technique using bite impression coping and a dual arch tray. MATERIALS AND METHODS: Two implant fixtures were placed on maxillary left second premolar and first molar area in dentoform model. The model with two fixtures was used as the reference. The impression was divided into 2 groups, n=10 each. In group 1, heavy/light body silicone impression was made with pick up impression copings and open tray...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/30140391/the-effect-of-zirconia-surface-architecturing-technique-on-the-zirconia-veneer-interfacial-bond-strength
#11
Soo-Bok Her, Kyoung Hun Kim, Sang Eun Park, Eun-Jin Park
PURPOSE: The purpose of this study was to evaluate the effect of the zirconia surface architecturing technique (ZSAT) on the bond strength between veneering porcelain and zirconia ceramic. MATERIALS AND METHODS: 20 sintered zirconia ceramic specimens were used to determine the optimal surface treatment time, and were randomly divided into 4 groups based on treatment times of 0, 1, 2, and 3 hours. After etching with a special solution, the surface was observed under scanning electron microscope, and then the porcelain was veneered for scratch testing...
August 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930796/evaluation-of-the-repeatability-and-matching-accuracy-between-two-identical-intraoral-spectrophotometers-an-in-vivo-and-in-vitro-study
#12
Hee-Kyung Kim
PURPOSE: The purpose of this study was to evaluate the repeatability and matching accuracy between two identical intraoral spectrophotometers. MATERIALS AND METHODS: The maxillary right central incisor, canine, and mandibular left central incisor of each of 30 patients were measured using 2 identical intraoral spectrophotometers with different serial numbers (EasyShade V). The color of each shade tab from 3 shade guides (VITA 3D-Master) was also determined with both devices...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930795/accuracy-evaluation-of-dental-models-manufactured-by-cad-cam-milling-method-and-3d-printing-method
#13
Yoo-Geum Jeong, Wan-Sun Lee, Kyu-Bok Lee
PURPOSE: To evaluate the accuracy of a model made using the computer-aided design/computer-aided manufacture (CAD/CAM) milling method and 3D printing method and to confirm its applicability as a work model for dental prosthesis production. MATERIALS AND METHODS: First, a natural tooth model (ANA-4, Frasaco, Germany) was scanned using an oral scanner. The obtained scan data were then used as a CAD reference model (CRM), to produce a total of 10 models each, either using the milling method or the 3D printing method...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930794/comparison-of-the-marginal-fit-of-milled-yttrium-stabilized-zirconium-dioxide-crowns-obtained-by-scanning-silicone-impressions-and-by-scanning-stone-replicas
#14
Estefanía Aranda Yus, Josep Maria Anglada Cantarell, Antonio Miñarro Alonso
PURPOSE: To determine the discrepancy in monolithic zirconium dioxide crowns made with computer-aided design and computer-aided manufacturing (CAD/CAM) systems by comparing scans of silicone impressions and of master casts. MATERIALS AND METHODS: From a Cr-Co master die of a first upper left molar, 30 silicone impressions were taken. The 30 silicone impressions were scanned with the laboratory scanner, thus obtaining 30 milled monolithic yttrium stabilized zirconium dioxide (YSZD) crowns (the silicone group)...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930793/the-effect-of-undersizing-and-tapping-on-bone-to-implant-contact-and-implant-primary-stability-a-histomorphometric-study-on-bovine-ribs
#15
Danilo Alessio Di Stefano, Vittoria Perrotti, Gian Battista Greco, Claudia Cappucci, Paolo Arosio, Adriano Piattelli, Giovanna Iezzi
PURPOSE: Implant site preparation may be adjusted to achieve the maximum possible primary stability. The aim of this investigation was to study the relation among bone-to-implant contact at insertion, bone density, and implant primary stability intra-operatively measured by a torque-measuring implant motor, when implant sites were undersized or tapped. MATERIALS AND METHODS: Undersized (n=14), standard (n=13), and tapped (n=13) implant sites were prepared on 9 segments of bovine ribs...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930792/color-comparison-between-non-vital-and-vital-teeth
#16
Delia Cristina Greta, Horaţiu Alexandru Colosi, Cristina Gasparik, Diana Dudea
PURPOSE: The aim of this study was to define a color space of non-vital teeth and to compare it with the color space of matched vital teeth, recorded in the same patients. MATERIALS AND METHODS: In a group of 218 patients, with the age range from 17 to 70, the middle third of the buccal surface of 359 devitalized teeth was measured using a clinical spectrophotometer (Vita Easyshade Advance). Lightness (L* ), chromatic parameters (a* , b* ), chroma (C* ), hue angle (h) and the closest Vita shade in Classical and 3D Master codifications were recorded...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930791/the-effect-of-sandblasting-duration-on-the-bond-durability-of-dual-cure-adhesive-cement-to-cad-cam-resin-restoratives
#17
Neslihan Tekçe, Safa Tuncer, Mustafa Demirci
PURPOSE: To evaluate the effect of prolonged sandblasting on the bond durability of dual-cure adhesive resin cement to computer-aided design and computer-aided manufacturing (CAD/CAM) restoratives. MATERIALS AND METHODS: Nano-ceramic LAVA Ultimate and hybrid-ceramic VITA Enamic CAD/CAM blocks were used for this study. Each CAD/CAM block was sectioned into slabs of 4-mm thickness for the microtensile test (µTBS) test and 2-mm thickness for the surface roughness test...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930790/-in-vitro-shear-bond-strength-between-fluorinated-zirconia-ceramic-and-resin-cements
#18
Merve Çakırbay Tanış, Canan Akay, Turgut Cihan Akçaboy, Murat Şen, Pınar Akkaş Kavaklı, Kadriye Sapmaz
PURPOSE: The purpose of this study was to evaluate the efficiency of a gas-phase fluorination method under different fluorination periods through using two resin cements. MATERIALS AND METHODS: 84 zirconia specimens in dimensions of 5 mm × 5 mm × 2 mm were prepared and surface treated with 50 µm aluminum oxide particles or gas phase fluorination for 2 min, 5 min, or 10 min. One specimen in each group was surface analyzed under scanning electron microscope. The remaining specimens were bonded to composite cylinders in dimensions of 2 mm diameter and 3 mm high with Panavia SA Plus or Variolink N...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930789/influence-of-scaling-procedures-on-the-integrity-of-titanium-nitride-coated-cad-cam-abutments
#19
Peter Gehrke, Emmanouil Spanos, Carsten Fischer, Helmut Storck, Florian Tebbel, Dirk Duddeck
PURPOSE: To determine the extent of treatment traces, the roughness depth, and the quantity of titanium nitride (TiN) removed from the surface of CAD/CAM abutments after treatment with various instruments. MATERIALS AND METHODS: Twelve TiN coated CAD/CAM abutments were investigated for an in vitro study. In the test group (9), each abutment surface was subjected twice (150 g vs. 200 g pressure) to standardized treatment in a simulated prophylaxis measure with the following instruments: acrylic scaler, titanium curette, and ultrasonic scaler with steel tip...
June 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29930788/a-retrospective-clinical-study-of-single-short-implants-less-than-8-mm-in-posterior-edentulous-areas
#20
Sang-Yun Kim, Jeong-Kui Ku, Hyun-Suk Kim, Pil-Young Yun, Young-Kyun Kim
PURPOSE: The goal of this study was to evaluate the clinical outcome of single short implants, less than 8 mm in length, placed in the posterior area. MATERIALS AND METHODS: A total of 128 patients (75 male and 53 female, mean age: 52.6±11.2 years) with 154 implants participated. Implant marginal bone loss, and survival and success rates were measured. RESULTS: The mean follow-up period was 51.35±24.97 months. A total of 128 implants, 8 mm in length, were placed in patients who had mean marginal bone loss of 0...
June 2018: Journal of Advanced Prosthodontics
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