Repair strength of 3D-printed denture base resins: Effect of surface treatment and repair material type.

Purpose: The aim of the study was to investigate the effect of surface treatment and repair materials on the flexural strength of repaired 3D-printed denture base resins after thermal aging.

Materials And Methods: Bar-shape specimens (64 × 10 × 3.3 mm) were designed as intact (control) specimens while repair specimens were printed in sections with 2.

Influence of different printing orientations and post-polymerization time on the translucency of three-dimensional (3D) printed denture base resins.

Purpose: To evaluate the effect of different printing orientations and post-polymerization time with thermal cycling on the translucency of 3D-printed denture base resins.

Methods: Heat-polymerized (HP) acrylic resin specimens were fabricated and 3D-printed denture base materials (NextDent, ASIGA, FormLabs) were printed with different printing orientations (0, 45, 90 degrees) and subjected to different post-polymerization times (15-, 30-, 60-, and 90-min). All specimens were polished and immersed in distilled water for 1 day at 37°C.

Repair Bond Strength of Conventionally and Digitally Fabricated Denture Base Resins to Auto-Polymerized Acrylic Resin: Surface Treatment Effects In Vitro.

Denture base fracture is one of the most annoying problems for both prosthodontists and patients. Denture repair is considered to be an appropriate solution rather than fabricating a new denture. Digital denture fabrication is widely spreading nowadays.

Push-Out Bond Strength of EndoSeal Mineral Trioxide Aggregate and AH Plus Sealers after Using Three Different Irrigation Protocols.

Objective:  The current study was designed to assess the bonding strength of EndoSeal MTA and AH Plus sealers after using three irrigation protocols as follows: (1) 17% Ethylenediamine tetraacetic acid, (2) 7% maleic acid, and (3) 37% phosphoric acid.

Materials And Methods:  Push-out bond strength was evaluated for 60 middle root slices of 1-mm thickness each. They were horizontally cut from freshly extracted single-rooted human teeth.

Closed Repair Technique: Innovative Surface Design for Polymethylmethacrylate Denture Base Repair.

Purpose: This study aimed to evaluate the repair strength of a newly introduced repair technique involving zero-gap repair width.

Materials And Methods: A total of 36 rectangular prism specimens with dimensions of 64 × 10 × 3.3 mm were prepared from heat-polymerized acrylic resin.

Color Stability and Surface Properties of PMMA/ZrO Nanocomposite Denture Base Material after Using Denture Cleanser.

Objectives: This study aimed to evaluate denture cleanser effects on color stability, surface roughness, and hardness of PMMA denture base resin reinforced with nano-ZrO.

Materials And Methods: A total of 420 specimens were fabricated of unreinforced and nano-ZrO reinforced acrylic resin at 2.5% and 5%, resulting in 3 main groups.

Double-layered acrylic resin denture base with nanoparticle additions: An in vitro study.

Statement Of Problem: Whether the addition of different antifungal nanoparticles to denture base materials may affect physical or esthetic properties of the resulting nanocomposite is unclear.

Purpose: The purpose of this in vitro study was to determine how a new method of adding antifungal nanofiller affects the properties of the processed nanocomposite denture base material.

Material And Methods: Heat-polymerized acrylic resin specimens were prepared according to each test specification.

Effects of Denture Cleansers on the Flexural Strength of PMMA Denture Base Resin Modified with ZrO Nanoparticles.

Purpose: The additions of zirconium oxide nanoparticles (nano-ZrO ) to denture base materials have produced nanocomposites with satisfactory properties, although there is a lack of research investigating the effects of denture cleansers on these materials. This study aimed to evaluate the effect of denture cleansers on the flexural strength of denture base materials modified with nano-ZrO .

Materials And Methods: A total of 270 specimens were fabricated from pure and nano-ZrO reinforced acrylic resins at 2.

Influence of artificial aging and ZrO2 nanoparticle-reinforced repair resin on the denture repair strength.

Background: The purpose of this study was to evaluate the effect of aging process on the tensile strength (TS) of repaired acrylic denture base using ZrO2 nanoparticles (nano-ZrO2)-reinforced autopolymerized resin.

Material And Methods: A total of 240 heat-polymerized acrylic resin specimens (n=10) were prepared and sectioned creating 2 mm-repair-gap. Autopolymerized acrylic resin, pure and modified with 2.

Impact of different surface treatments and repair material reinforcement on the flexural strength of repaired PMMA denture base material.

This study assessed the impact of surface treatments and repair resin reinforcement with zirconium oxide nano-particles (nano-ZrO) on flexural strength (FS) of repaired denture base. A total of 320 heat-polymerized acrylic resin specimens were prepared and sectioned creating 2-mm gap. According to repair surface treatment, specimens were distributed into four groups: I) methyl methacrylate (M); II) alumina-blasted (AB); III) AB+silane coupling agent (SC); and IV) AB+methacrylate based composite bonding agent (MA).

Effect of Repair Gap Width on the Strength of Denture Repair: An In Vitro Comparative Study.

Purpose: To evaluate the effect of repair gap width on the flexural strength and impact strength of a repaired acrylic denture with and without thermal cycling.

Materials And Methods: A total of 240 heat-polymerized acrylic resin specimens were fabricated in dimensions of 65 × 10 × 2.5 ± 0.

Reinforcement of PMMA Denture Base Material with a Mixture of ZrO Nanoparticles and Glass Fibers.

This study is aimed at evaluating the hybrid reinforcement effects of zirconium oxide nanoparticles (nano-ZrO) and glass fibers (GFs) at different ratios on the flexural and impact strengths of a polymethylmethacrylate (PMMA) denture base. A total of 160 specimens were fabricated from heat-polymerized acrylic resins using the water bath technique. For the control group, the specimens did not receive any additions; for the test group, different concentrations of nano-ZrO/GFs at 5% of the PMMA polymer were added.

Push-out bond strength of different types of mineral trioxide aggregate in root dentin.

Objective: The objective of this study was to measure the push-out bond strength of three types of mineral trioxide aggregate (MTA) materials in root dentin.

Methods: The study was carried out at the College of Dentistry, Imam Abdulrahman Bin Faisal University from March 2014 to January 2015. Thirty extracted maxillary central incisors were selected, instrumented, irrigated, and randomly assigned into three groups ( = 10): Group 1 - Ortho MTA; Group 2 - MTA Angelus; and Group 3 - ProRoot MTA.

Effect of polymerization technique and glass fiber addition on the surface roughness and hardness of PMMA denture base material.

The current study evaluated the effects of autoclave polymerization both with and without glass fiber (GF) reinforcement on the surface roughness and hardness of acrylic denture base material. Ninety disc specimens (30×2.5 mm) were prepared from Vertex resin and divided according to polymerization techniques into a water bath, short and long autoclave polymerization groups.

Effect of zirconium oxide nanoparticles addition on the optical and tensile properties of polymethyl methacrylate denture base material.

Background: Polymethyl methacrylate (PMMA) is widely used for the fabrication of removable prostheses. Recently, zirconium oxide nanoparticles (nano-ZrO) have been added to improve some properties of PMMA, but their effect on the optical properties and tensile strength are neglected.

Objective: The aim of this study was to investigate the effect of nano-ZrO addition on the translucency and tensile strength of the PMMA denture base material.

Influence of incorporation of ZrO nanoparticles on the repair strength of polymethyl methacrylate denture bases.

Background: Repeated fracture of the denture base is a common problem in prosthodontics, and it represents a nuisance and a time sink for the clinician. Therefore, the possibility of increasing repair strength using new reinforcement materials is of great interest to prosthodontists.

Aim Of The Study: This study aimed to evaluate the effects of incorporation of zirconia nanoparticles (nano-ZrO) on the flexural strength and impact strength of repaired polymethyl methacrylate (PMMA) denture bases.

The Reinforcement Effect of Nano-Zirconia on the Transverse Strength of Repaired Acrylic Denture Base.

Objective. The aim of this study was to evaluate the effect of incorporation of glass fiber, zirconia, and nano-zirconia on the transverse strength of repaired denture base. Materials and Methods.

Use of local sliding flaps to manage deep localized burns of the hand.

The incidence of hand burns in children is high. In the overall cases of body burns, hand and wrist burns account for about 39%. They may constitute a part of a larger burn of the body, or an isolated injury of the hand and wrist.