A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw.

This study investigates the impact of tightening torque (preload) and the friction coefficient on stress generation and fatigue resistance of a Ti-6Al-4V abutment screw with an internal hexagonal connection under dynamic multi-axial masticatory loads in high-cycle fatigue (HCF) conditions. A three-dimensional model of the implant-abutment assembly was simulated using ANSYS Workbench 16.2 computer aided engineering software with chewing forces ranging from 300 N to 1000 N, evaluated over 1.

Synergistic effect of graphene oxide/calcium phosphate nanofiller in a dentin adhesive on its dentin bond integrity and degree of conversion. A scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared, micro-Raman, and bond strength study.

The objective was to formulate and analyze a dentin adhesive incorporated with graphene oxide (GO) nanoparticle and calcium phosphate (CaP) composite. Methods comprising of scanning electron microscopy (SEM)-energy dispersive X-ray spectroscopy (EDX), micro-Raman spectroscopy, shear bond strength (SBS), and Fourier transform infrared (FTIR) spectroscopy were used to characterize nanoparticle composite, dentin bond toughness, degree of conversion (DC), and adhesive-dentin interaction. Postsynthesis of GO nanoparticles, they were functionalized with CaP using standard process.

Effect of Apical Root Canal Perforation Size on Push-out Bond Strength of Glass Fiber Dowels.

Aim: To evaluate effect of apical root canal perforation size on push-out bond strength of glass fiber dowels cemented to sound or perforated root canals using two different adhesive systems.

Materials And Methods: A total of 120 human-extracted intact upper central incisors were selected. Teeth were sectioned 3 mm coronal to cement enamel junction, and the remaining root received endodontic root canal therapy.

Influence of abutment material on the shade of dental implant restorations in the esthetic zone: a single case report.

High esthetic demand and expectation challenges the rehabilitation of the esthetic zone with dental implants. Most implant system manufacturers offer customized and prefabricated ceramic, specifically zirconia or alumina abutments, as an alternative to titanium or gold alloy abutments, with the aid of computer-aided designing/computer aided manufacturing (CAD/CAM) technology. A 45-year-old male patient was referred to the prosthodontics clinic for the restoration of maxillary central incisors with all ceramic dental implants.

Evaluation of the Effect of Glow Discharge Plasma Surface Treatment on Bonding Cements to Zirconia.

Background: The major difference in the chemical composition of Y-TZP ceramics, as compared with conventional porcelain, led researchers to develop alternative solutions for achieving durable and long term bonding with the zirconia surface.

Objective: The study aims to evaluate the effects of glow discharge treatment on the bonding between cement and zirconia.

Methods: The zirconia rings and rods were prepared with the Zirconia Y-TZP powder and TZ-3YSB-E (Tosoh-Zirconia) through auto-mix to investigate the glow discharge and thermo-cycling.

Effects of using Antifungal Gel on Retentive Bond Strength of Two Forms of Denture Adhesives: An in vitro Study.

Aim: The purpose of this in vitro study is to compare the bond strength to denture acrylics efficacy of miconazole gel against two denture adhesives with improved retentive properties (zinc-free PoliGrip cream and Snug denture soft cushion).

Materials And Methods: Eight heat-cured acrylic samples were prepared measuring 0.7 cm × 1.

Effect of Surface Treatments and Adhesive Materials on the Shear Bond Strength of Artificial Denture Teeth to Denture Base Resins.

Aim: The purpose of the current study was intended to evaluate the effect of different surface modifications and different adhesive materials on the shear bond strength of artificial teeth to heat-polymerized and thermoplastic denture base materials using different repair techniques.

Materials And Methods: Forty cross-linked artificial teeth used to construct different types of acrylic based denture prosthesis were selected to be bonded to two types of denture base materials, heat-polymerized acrylic resin denture base material, and thermoplastic acrylic resin denture base material. The specimens were divided into four subgroups according to the repair technique and adhesive material used.

Peri-implant soft tissue status and crestal bone levels around adjacent implants placed in patients with and without type-2 diabetes mellitus: 6 years follow-up results.

Background: The long-term success and survival of dental implants type-2 diabetic subjects is debatable.

Purpose: The present 6 years' follow-up prospective clinical study compared the peri-implant soft tissue status and crestal bone loss (CBL) around adjacent implants placed among type-2 diabetic and nondiabetic subjects.

Materials And Methods: Type-2 diabetic (Group-1) and nondiabetic individuals (Group-2) with adjacent dental implants were included.

Association of advanced glycation end products with peri-implant inflammation in prediabetes and type 2 diabetes mellitus patients.

Background: It is postulated that peri-implant sulcular fluid (PISF) levels of advanced glycation end products (AGEs) are higher with high glycemic levels.

Purpose: In the present clinico-biochemical study, we explored the clinical and radiographic peri-implant parameters and levels of AGEs among prediabetic, type 2 diabetic (T2DM), and non-diabetic patients and to evaluate the correlation of AGEs with clinical peri-implant parameters.

Materials And Methods: Ninety patients were divided into three groups of 30 patients each; group 1: patients with prediabetes; group 2: patients with T2DM; and group 3: non-diabetic individuals.

Assessment of matrix metalloproteinase-8 and -9 levels in the peri-implant sulcular fluid among waterpipe (narghile) smokers and never-smokers with peri-implantitis.

Objectives: It is hypothesized that levels of matrix metalloproteinase (MMP)-8 and MMP-9 are significantly higher in the peri-implant sulcular fluid (PISF) of waterpipe-smokers (WS) compared with never-smokers with peri-implantitis. The aim of the present convenience sample case-control study was to compare the levels of MMP-8 and MMP-9 in the PISF of WS and never-smokers with peri-implantitis.

Material And Methods: Individuals smoking waterpipe (Group 1) and never-smokers (Group 2) were included.

Degree of conversion of resin cement with varying methacrylate compositions used to cement fiber dowels: A Raman spectroscopy study.

Statement Of Problem: Studies on the degree of conversion of dental cement in relation to the number of methacrylate components are lacking.

Purpose: The purpose of this in vitro study was to evaluate the degree of conversion of single- and multicomponent methacrylate-containing dental cements around opaque and translucent fiber dowels at varying depths.

Material And Methods: Teeth were prepared for standard endodontic therapy, and a dowel space was created.