Surface characteristics of additively manufactured CoCr and Ti6Al4V dental alloys: The effects of carbon and gold thin film coatings, and alkali-heat treatment.

This study investigates the impact of surface modifications on additively manufactured CoCr and Ti6Al4V dental alloys, focusing on surface properties. Thin film carbon (C) and gold (Au) coatings, as well as alkali-heat treatment, were applied to the high- and low-polished specimens. Scanning electron microscopy (SEM) showed that thin film coatings retained the underlying surface topography, while the alkali-heat treatment induced distinct morphological changes.

Comparison of different 3D printers in terms of dimensional stability by image data of a dry human mandible obtained from CBCT and CT.

Objectives: To manage the mandibular traumas, for the expression of the complex anatomy or pathology in education of health sciences related branches, a model of the traumatized mandible is indispensable. For these, different 3D-print-technologies can be used. The aim of this study is, to measure how close these 3D-printed-models are to human-mandible (trueness) and the effectiveness of CT and CBCT at this point.

The impact of print orientation on the fracture resistance and failure patterns of additively manufactured cobalt-chromium post and cores.

Purpose: The aim of this study was to evaluate the impact of the print orientation of direct metal laser sintering (DMLS) posts and cores on the fracture resistance and failure patterns of endodontically treated mandibular premolar teeth.

Materials And Methods: Sixty intact human mandibular premolars were endodontically treated. The teeth were then randomly divided into four groups (n = 15).

Vertical Bone Augmentation With Customized CAD/CAM Titanium Mesh for Severe Alveolar Ridge Defect in the Posterior Mandible: A Case Letter.

Implant rehabilitation after implant removal is a major challenge, especially in mandibular posterior arches. This case report describes the reconstruction of a severe vertical bone defect using customized titanium mesh covered by collagen membrane and solid advanced platelet-rich fibrin, combined with autogenous bone, deproteinized bovine bone mineral, and injectable platelet-rich fibrin after implant removal caused by advanced peri-implantitis. This individualized titanium mesh may be a reliable technique for severe alveolar ridge reconstruction, with the additional benefits of reduced surgery time and a simplified operation.

Simultaneous Closure of Bilateral Cranial Defects Using Custom-Made 3D Titanium Implants: A Single Institution Series.

Aim: To investigate the outcomes of the simultaneous closure of bilateral cranial defects using custom-made three-dimensional (3D) titanium implants.

Material And Methods: Demographic data of 26 patients with bilateral cranial defects who underwent cranioplasty using the 3D custom-made titanium implants in our clinic between 2017 and 2022 were retrospectively reviewed. Data on the area of cranium defect, the time interval between last cranial surgery and cranioplasty, postoperative complications, etiology of the cranium defect, and hospitalization of the patient were statistically evaluated.

Mechanical Properties and Bond Strength of Additively Manufactured and Milled Dental Zirconia: A Pilot Study.

Purpose: To evaluate and compare the mechanical properties and ceramic bond of additively manufactured and milled dental zirconia materials.

Materials And Methods: Disc (r = 10 mm, h = 2 mm) and bar (25 4 × 1. 2 mm) shaped milled (M group) (Nacera Pearl; Doceram) and additively manufactured (AM group) (NanoParticle Jetting; XJet, Carmel 1400) zirconia specimens were prepared for 2 experimental groups.

In vitro accuracies of 3D printed models manufactured by two different printing technologies.

Purpose: This study aims to compare the accuracies of full-arch models printed by two different 3D printing technologies.

Materials And Methods: A mandibular horseshoe-shaped master model was designed with RapidForm XOR2 software The master model was printed 10 times with 3D printers using direct light processing (DLP) and PolyJet technology (n=20). The printed models were then scanned with an industrial scanner and saved in STL file.

Orthopedics and 3D technology in Turkey: A preliminary report.

Objectives: In this study, we present the use of case specific three-dimensional (3D) printed plastic models and custom-made acetabular implants in orthopedic surgery.

Materials And Methods: Between March 2018 and September 2020, surgeries were simulated using plastic models manufactured by 3D printers on the two patients with pilon fractures. Also, custom-made acetabular implants were used on two patients with an acetabular bone defect for the revision of total hip arthroplasty (THA).

Effects of magnetic resonance imaging on the microleakage of five restorative materials: An in vitro study.

Objective: The objective of this study was to assess the effects of 3 T magnetic resonance imaging (MRI) on the microleakage of 5 restorative materials.

Methods: In total, 100 maxillary molars were randomly assigned to 5 groups (n = 20) for restoration with 5 different materials: amalgam, light-cured glass-ionomer cement, feldspathic porcelain fused to metal, pressed lithium disilicate glass ceramic, and composite resin. In each group, 10 specimens were subjected to MRI, and 10 specimens served as controls with no MRI exposure.

Accuracy evaluation of complete-arch models manufactured by three different 3D printing technologies: a three-dimensional analysis.

Purpose This study aimed to evaluate the trueness and precision of complete-arch models printed with three-dimensional printers via three different printing technologies.Methods An arch-shaped master model was designed using software (RapidForm XOR2, 3D Systems Inc., USA), and the digital master model was printed 10 times with three-dimensional printers using stereolithography (SLA), direct light processing (DLP), and Polyjet technology (n = 30).

Effect of 1.5-T and 3.0-T magnetic resonance imaging on the ceramic adhesion and physical properties of prosthetic substructures.

Statement Of Problem: Magnetic resonance imaging (MRI) is a cross-sectional imaging technique that is widely used in the detection of pathologies in the head and neck region. However, information is lacking about the effect of MRI imaging on the clinical success of fixed partial dentures (FPDs).

Purpose: The purpose of this in vitro study was to analyze the effect of MRI on the physical properties and ceramic adhesion of FPD substructure materials.

3D-Printed Splitter for Use of a Single Ventilator on Multiple Patients During COVID-19.

During epidemics or pandemics affecting the respiratory systems, hospital equipment such as ventilators may become insufficient and different solutions can be considered. In fast spreading respiratory illnesses such as COVID-19 due to the rapidly increasing number of patients, ventilatory machine insufficiencies may appear. It may be considered to use one hospital ventilator for more than one patient by dividing the airway of the machine with a specially designed splitter.

Effect of Denture Cleansing Solutions on the Retention of Locator Attachments Over Time.

Purpose: To evaluate and compare the alterations in retention of three Locator attachments after immersion in various denture cleansers at defined time intervals.

Materials And Methods: Two implants were embedded in an acrylic block. Pink, blue, and clear Locator attachments (n = 10 for each subgroup) were immersed into three different cleansing solutions (Corega, Protefix and NaOCl) and tap water (control) at different time intervals that simulate 1 (T ), 6 (T ), and 12 (T ) months of clinical use.

Evaluation of the trueness and precision of eight extraoral laboratory scanners with a complete-arch model: a three-dimensional analysis.

Purpose: The purpose of this study was to evaluate the trueness and precision of eight different extraoral laboratory scanners using three-dimensional (3D) analysis method.

Method: An arch-shaped master model was designed with a computer software (Rapidform XOR2) and manufactured with a 3D printer (Projet 3510 MP). Then the master model was digitized with an industrial 3D scanner (ATOS Core 200).

What is the changing frequency of diamond burs?

Purpose: The purpose of this study was to determine the changing frequency of a diamond bur after multiple usages on 3 different surfaces.

Materials And Methods: Human premolar teeth (N = 26), disc shaped direct metal laser sintered CoCr (N = 3) and zirconia specimens (N = 3) were used in this study. Groups named basically as Group T for teeth, Group M for CoCr, and Group Z for zirconia.

Influence of core thickness and artificial aging on the biaxial flexural strength of different all-ceramic materials: An in-vitro study.

The purpose of this study was to investigate the flexural strength of all-ceramics with varying core thicknesses submitted to aging. In-Ceram Alumina (IC), IPS e.max Press (EM) and Katana (K) (n=40), were selected.

A Nanocomposite Shield Constructed for Protection Against the Harmful Effects of Dental X-Rays.

Objectives: This study aimed to compare a number of new nano-composites capable of protecting the jaw from ionizing radiation.

Materials And Methods: Four different types of nano-powders [Ti, Zr (IV) oxide, Ag and Co] were mixed in a polymer matrix to create nano-composites with doping values of 8% in weight. Small-angle X-ray scattering (SAXS) analysis was performed using a HECUSSAXS system with 50 kV- 50 mA.

Evaluation of Low-Level Laser Therapy in TMD Patients.

Light amplification by stimulated emission of radiation (laser) is one of the most recent treatment modalities in dentistry. Low-level laser therapy (LLLT) is suggested to have biostimulating and analgesic effects through direct irradiation without causing thermal response. There are few studies that have investigated the efficacy of laser therapy in temporomandibular disorders (TMD), especially in reduced mouth opening.

Progressive Hemifacial Atrophy With Contralateral Uveitis: A Case Report.

Introduction: Progressive hemifacial atrophy, known as Parry-Romberg syndrome (PRS), was first described by Parry in 1825. There is a progressive atrophy of facial tissues including skin, bones and muscles. Ophthalmic disorders are common and include keratitis, uveitis, cataract, ipsilateral enophthalmos, optic neuritis, retinal vasculitis and scleral melting.

Effect of varying core thicknesses and artificial aging on the color difference of different all-ceramic materials.

Objective: Clinicians should reserve all-ceramics with high translucency for clinical applications in which high-level esthetics are required. Furthermore, it is unclear whether a correlation exists between core thickness and color change. The aim of this study was to examine the effects of different core thicknesses and artificial aging on the color stability of three all-ceramic systems.

Correlation between microleakage and screw loosening at implant-abutment connection.

Purpose: This study aimed to evaluate the correlation between microleakage and screw loosening at different types of implant-abutment connections and/or geometries measuring the torque values before and after the leakage tests.

Materials And Methods: Three different abutment types (Intenal hex titanium, internal hex zirconium, morse tapered titaniuım) with different geometries were connected to its own implant fixture. All the abutments were tightened with a standard torque value then the composition was connected to the modified fluid filtration system.