Evaluation of trabecular bone changes according to the type of prosthesis in patients using bisphosphonates: a retrospective study.

The objective of the study was to retrospectively compare the fractal size values calculated in the trabecular bone according to the type of complete removable denture, removable partial denture, and partial fixed prosthesis between patients using bisphosphonates and healthy patients, retrospectively. Panoramic radiographs of a total of 200 patients, (100 using bisphosphonates,100 control group), were taken from the right and left molar regions before and after treatment with 72 × 72 pixels. The fractal dimension (FD) was computed by using ImageJ Software using the box-counting method on the images obtained.

Fatigue and Stress Distribution Analyses of Ceramic-Reinforced PEEK Abutments Restored with Monolithic Zirconia Crowns as an Alternative to Conventional Esthetic Abutments.

Purpose: To determine the fracture strength and stress distribution of esthetic dental implant abutments.

Materials And Methods: Fifty specimens were prepared. Four hybrid abutment groups with titanium bases (zirconia [Z], lithium disilicate [L], ceramic-reinforced polymer [B] and [BC]) and a custom titanium abutment control group (T) were restored with monolithic zirconia crowns except BC, which was crowned with layered composite.

Evaluation of 3D Face-Scan images obtained by stereophotogrammetry and smartphone camera.

Objective: The purpose of this study is to compare and analyze the similarities between three-dimensional images captured by a smartphone camera with depth sensors and a conventional 3dMD Face system.

Materials And Methods: Twenty six individuals (16 female, 10 male) were involved in this study, agreed to take part and as such had no paralysis, tics, etc., which may prevent taking the image.

Combined approach to treatment of advanced stages of medication-related osteonecrosis of the jaw patients.

Introduction: Increased incidence of localized osteonecrosis in the jaw bones caused by bisphosphanate use and reduced quality of life of the patients led researchers to diagnose the disease in the early period and to investigate the effective treatment modality.

Objective: Treatment of medication-related osteonecrosis of the jaw patients is based on individual protocols from clinical experience, as there are no definitive treatment guidelines. In view of the lack of consensus on the effectiveness of medication-related osteonecrosis of the jaw treatments in the literature, the aim of this study was to evaluate the surgical technique described in the treatment of advanced stages of medication-related osteonecrosis of the jaw patients.

Radiographic Evaluation of Infraorbital Canal Protrusion into Maxillary Sinus Using Cone-Beam Computed Tomography.

Objectives: The aim of this retrospective study was to evaluate the relation of the infraorbital canal course with the maxillary sinus using cone-beam computed tomography.

Material And Methods: A total of 1000 infraorbital canals (IOC) were examined from 500 cone-beam computed tomography scans. IOCs were classified into three types based on the degree of protrusion into the sinus.

Radiographic determination of trabecular bone change in 2- and 4-implant-supported overdenture prostheses.

Objective: The aim of this study was to compare the fractal dimensions (FDs) of peri-implant trabecular bone around 2-implant-supported overdentures with the FDs around 4-implant-supported overdentures at the time of implant placement (T0) and 1 year after placement (T1).

Study Design: Standardized regions of interest were chosen at sites mesial and distal to 60 mandibular implants: 20 in 2-implant-supported prostheses (group 1) and 40 in 4-implant-supported prostheses (group 2), for a total of 120 measurements. FD values were calculated by using ImageJ software with the box-counting method.

wear determination of novel CAD/CAM ceramic crowns by using 3D alignment.

Purpose: To determine wear amount of single molar crowns, made from four different restoratives, and opposing natural teeth through computerized fabrication techniques using 3D image alignment.

Materials And Methods: A total of 24 single crowns (N = 24 patients, age range: 18 - 50) were made from lithium disilicate (IPS E-max CAD), lithium silicate and zirconia based (Vita Suprinity CAD), resin matrix ceramic material (Cerasmart, GC), and dual matrix (Vita Enamic CAD) blocks. After digital impressions (Cerec 3D Bluecam, DentsplySirona), the crowns were designed and manufactured (Cerec 3, DentsplySirona).

Evaluation of Different Thickness, Die Color, and Resin Cement Shade for Veneers of Multilayered CAD/CAM Blocks.

Purpose: To investigate the effect of resin cement color on the post-cementation shade of thin laminate veneers milled from multilayered glass ceramic blocks for each layer.

Materials And Methods: Thin slices (N = 180) with two thicknesses (A: 8 × 8×0.55 mm and B: 8×8×0.

Comparison of cyclic fatigue resistance of original and counterfeit rotary instruments.

Introduction: In recent years, with the advances in counterfeiting methods, counterfeit products have reached the dental market. The purpose of this study was to compare the cyclic fatigue resistance of original and counterfeit rotary root canal instruments.

Materials And Methods: The cyclic fatigue of original and counterfeit ProTaper F2 endodontic instruments was tested (n = 20) in 3 mm radius steel canals with a 60° angle of curvature.

Elastic-plastic finite elements analysis of transient and residual stresses in ceramo-metal restorations.

Transient and residual stresses occurring in partially fixed dental prostheses after the firing process can be calculated with elastic or elastic-plastic finite element analyses (FEA). In this study, firstly, the mechanical and thermal properties at various temperatures of the materials used in a porcelain fused metal (PFM) system were obtained by experimental and literature studies. The effects of viscoelastic and viscoplastic behaviours of the dental porcelain at the elevated temperatures were reflected onto its elastic properties.