Several impression materials are available in the Brazilian marketplace to be used oral rehabilitation. The aim of this study was compare accuracy different for fixed partial dentures following manufacturers' instructions. A master model representing a partially edentulous mandibular right hemi-arch segment whose teeth were prepared receive full crowns used. Custom trays with auto-polymerizing acrylic resin and impressions performed dental surveyor, standardizing path insertion removal tray....

Internal tapered connections were developed to improve biomechanical properties and reduce mechanical problems found in other implant connection systems. The purpose of this study was evaluate the effects loading repeated insertion/removal cycles on torque loss abutments with internal connections.Sixty-eight conical implants 68 two types used. They divided into four groups: groups 1 3 received solid abutments, 2 4 two-piece abutments. In 2, simply installed uninstalled; torque-in torque-out...

The aim of this study was to determine the effect oral environment on corrosion dental alloys with different compositions, using electrochemical methods. rates were obtained from current-potential curves and impedance spectroscopy (EIS). artificial saliva dependent alloy composition. Dissolution ions occurred in all tested results strongly general Regarding containing nickel, Ni-Cr Ni-Cr-Ti released 0.62 mg/L Ni average, while Co-Cr between 0.01 0.03 Co Cr, respectively.The open-circuit...

This study compared splinted and non-splinted implant-supported prosthesis with without a distal proximal contact using digital image correlation method. An epoxy resin model was made acrylic replicas of mandibular first premolar second molar threaded implants replacing the molar. Splinted metal–ceramic screw-retained crowns were fabricated loaded presence A single-camera measuring system used to record in-plane deformation on surface at frequency 1.0 Hz under load from 0 250 N. The images...

This study compared the loosening torque of experimental conical-head abutment screws to that conventional flat-head implants with external-hex (EH) and internal tri-channel (IT) connections before after mechanical loading.Forty-four implant/screw/abutment assemblies were divided into four groups: EH/flat-head screw (EH), IT/flat-head (IT), EH/conical-head (EHCS), IT/conical-head (ITCS). Three from each group analyzed in a stereoscopic magnifier then returned their respective groups. One...

This study compared vertical and passive fit of one-piece cast frameworks made with 3 different materials: commercially pure titanium (CP Ti - G1), cobalt-chromium alloy (Co-Cr G2) nickel-chromium-titanium (Ni-Cr-Ti G3). Fifteen were obtained simulating bars for fixed prosthesis in a model 5 implants. The the framework interface was measured using an optical microscope at ×30 magnification. Data statistically analyzed by ANOVA LSD tests (α=0.05). Mean standard deviation values were,...

Abstract Objectives: The aim of this study was to evaluate the variation in removal torque implant prosthetic abutment screws after successive tightening and loosening cycles, addition evaluating influence hexagon at base on screw torque. Material methods: Twenty hexagonal abutments were tightened 20 regular external hex implants with a titanium alloy screw, an insertion 32 N cm, measured digital gauge. implant/abutment/screw assemblies divided into two groups: (1) without (2) base. Each...

This study aimed to verify the effect of modified section method and laser-welding on accuracy fit ill-fitting commercially pure titanium (cp Ti) Ni-Cr alloy one-piece cast frameworks. Two sets similar implant-supported frameworks were constructed. Both groups six 3-unit fixed partial dentures as [I: (control) II: cp Ti] evaluated for passive fitting in an optical microscope with both screws tightened only one screw tightened. All then sectioned diagonal axis at pontic region (III: IV: Ti)....

Abstract Background The biomechanical behavior of implant‐supported titanium and zirconia full‐arch fixed dental prosthesis (FAFDP) frameworks require further investigation. Purpose Strains transferred by (Ti) (Zr) FAFDP were analyzed. Materials Methods Maxillary 14‐unit FAFDPs supported 6 implants 12‐unit 4 tested. One‐piece fabricated computer‐aided design/computer‐aided manufacturing. Four groups divided ( n = 3): G1, Ti‐6 implants; G2, Zr‐6 G3, Ti‐4 G4, Zr‐4 implants. A 250 N...

Background and Objectives: The manufacturing of single crowns using hybrid abutments is an alternative that may be interesting in clinical practice, combining the advantages different materials used a personalized design for each case. purpose this vitro study was to evaluate torque loss, survival, reliability, failure mode, strain distribution implant-supported prostheses with zirconia (Zir) cobalt–chromium (Co-Cr) abutments. Materials Methods: Abutments were milled by CAD/CAM divided into...

O experimento foi realizado em condições anaeróbicas com o uso de frasco ANKOM® Gas Pressure Monitor mantidas à 39 ºC contendo saliva artificial, líquido ruminal e dois gramas substrato cada tratamento: (MIL) 2,00 milho (RUM) 1,28 0,72 núcleo mineral. Em duas rodadas, foram utilizados frascos para tratamento branco apenas artificial ruminal, totalizando quatro repetições por tratamento, mantidos sobre delineamento casualizado. A pressão acumulada oriunda da fermentação mensurada...

O teste ocorreu em um ambiente sem oxigênio, utilizando recipientes ANKOM® Gas Pressure Monitor, mantidos a uma temperatura de 39 ºC. Os continham saliva artificial, líquido ruminal para cada condição testada: MILHO – substrato composto por 2,0 gramas milho e PROTAGON 1,62 + 0,32 do suplemento PROTAGON®. Para tratamento, foram empregados quatro frascos. Além disso, dois frascos designados como brancos, contendo apenas artificial. Após 48 horas incubação, os gases produzidos nos coletados...

The durability of the materials used in prosthesis is a determining factor for success rehabilitation. aim study was to evaluate wear resistance monolithic lithium disilicate ceramics processed by heat pressing and computer-aided design/computer-aided manufacturing (CAD/CAM) methods, with leucite-reinforced feldspathic ceramic CAD/CAM serving as control group. Monolithic samples, milled blocks or heat-pressed ingots, were tested against flat zirconia antagonists. A specimen. Conical...

A odontologia forense, é um campo que desempenha papel essencial na identificação de indivíduos, especialmente em tragédias, utilizando técnicas como rugas palatinas, sialoquímica e registros odontológicos. Este estudo revisa a literatura sobre antropologia forense humana, abordando sua relevância técnica aplicação prática. pesquisa foi conduzida bases SciELO, PubMed LILACS, no período 2020 2025, empregando descritores "Odontologia Forense" "Identificação Humana", refinados com os conectores...