Effect of Thixotropic Agent on the Color Stability of Platinum-Based Silicone Maxillofacial Elastomers after Artificial Aging.

Maxillofacial prostheses are essential for restoring natural appearance and function in individuals with defects in the head and neck regions. Thixotropic agents, as liquid additives, are known to increase the viscosity of silicone elastomers. However, color deterioration remains a challenge in facial prostheses, leading to the need for refabrication.

Dynamic and static load performance of dental biomaterial systems with conical implant-abutment connections.

Background: The stability of the implant-abutment interface is an important factor that influences load distribution on the marginal bone.

Objective: In this study, three dental implants with the same connection were subjected to different dynamic loading cycles. The fracture strengths and the horizontal compatibility of implants were assessed.

Color and translucency of zirconia infrastructures and porcelain-layered systems.

Statement Of Problem: A good color match combined with a proper translucency match results in excellent esthetics for a metal-free restoration, yet basic color and translucency comparisons between available zirconia systems are not well described.

Purpose: The purpose of this in vitro study was to compare the color and translucency of commercially available zirconia materials.

Material And Methods: Eight specimen disks were formed in each of the single-layer (0.

Effects of different loading protocols on the secondary stability and peri-implant bone density of the single implants in the posterior maxilla.

Background: Immediate or early loading of dental implants becomes a clinically feasible concept.

Purpose: The aim was to evaluate the effects of different loading protocols (immediate, early, and delayed) on secondary stability and peri-implant bone density of single implants in the posterior maxilla.

Materials And Methods: Thirty-nine implants (Dentium, South-Korea) were placed in 39 patients.

Effects of NSAIDs and hydroxyapatite coating on osseointegration.

Purpose: The aim of our study is to investigate the bone ongrowth of two different alternative surfaces and the effect of nonsteroidal anti-inflammatory drugs (NSAIDs) on osseointegration.

Methods: Hips of 40 New Zealand white rabbits were operated bilaterally. Hydroxyapatite (HA)-coated titanium rods were implanted into the right femur, and grit-blasted titanium rods were implanted into the left femur.

Does cone beam computed tomography-derived bone density give predictable data about stability changes of immediately loaded implants?: A 1-year resonance frequency follow-up study.

The aim of this clinical study was to evaluate whether preoperative bone density value derived from cone-beam computed tomography (CBCT) gives predictable data about primary and secondary stability characteristics of immediately loaded dental implants under different clinical variables. A total of 77 immediately loaded implants placed in 23 patients were included the study. Bone density values of the implant recipient sites were recorded using CBCT.

Evaluation of relationship between preoperative bone density values derived from cone beam computed tomography and implant stability parameters: a clinical study.

Objectives: The aim of this study was to explore the efficacy of bone density value derived from cone beam computed tomography (CBCT) by evaluating its correlation with implant stability parameters including insertion torque value (ITV) and radiofrequency analysis in relation to different clinical variables including location, gender, age, bone quality, and implant diameter.

Material And Methods: A total of 65 implants were placed in 17 patients. The bone densities of implant recipient sites were preoperatively recorded using CBCT.

Metal ceramic bond after multiple castings of base metal alloy.

Statement Of Problem: Remelting previously cast metal can produce a critical change in metal-oxide composition at the dental alloy surface.

Purpose: The purpose of this study was to evaluate the effect of multiple castings on bonding of a single selected base metal and a dental ceramic, and to compare results from shear bond and 3-point-bending tests.

Material And Methods: Three groups of dental alloy (Remanium CSe) were prepared by mixing 50% fresh alloy to alloy remnants from previous castings.

Effect of tulle on the mechanical properties of a maxillofacial silicone elastomer.

The purpose of this research was to investigate if physical properties could be improved by incorporating a tulle reinforcement material into a maxillofacial silicone elastomer. A-2186 silicone elastomer was used in this study. The study group consisted of 20 elastomer specimens incorporated with tulle and fabricated in dumbbell-shaped silicone patterns using ASTM D412 and D624 standards.

Influence of layer thickness on stress distribution in ceramic-cement-dentin multilayer systems.

The effects of dentin and cement thicknesses on stress level and distribution of crack propagation in ceramic-cement-dentin multilayer complex were analyzed. Custom-designed finite element analysis program based on JL Analyzer was used to analyze the stress distribution and present the maximum principal stress locations. In Zirconia, all the maximum stress values were above 100 MPa.

Effect of botulinum toxin-A in myofascial pain patients with or without functional disc displacement.

Purpose: To evaluate the effects of botulinum toxin-A in the treatment of patients who have myofascial pain with or without functional disc displacement.

Patients And Methods: Twenty-four participants were randomly assigned to the study by using Research Diagnostic Criteria for Temporomandibular Disorders. All patients were informed about botulinum toxin-A, and were required to give informed consent.

Placement of implants in the mandible reconstructed with free vascularized fibula flap: comparison of 2 cases.

The reconstruction of mandibular continuity defects after tumor resection with free vascularized bone flaps is considered to be a treatment option. Although the fibula flap presents many advantages, it does not offer sufficient bone height to restore the alveolar arch when reconstruction involves a dentate mandible. In this report, 2 patients who were referred to our clinic with reconstructed mandibles with diagnosis of amelablastoma are presented and compared.

Histomorphometric evaluation of implants coated with enamel or dentine derived fluoride-substituted apatite.

Objectives: The aim of this study was to compare osseous healing characteristics of titanium implants coated with enamel-derived fluoride-substituted apatite (EFSA) or dentin-derived fluoride-substituted apatite (DFSA).

Methods: Fluoride-substituted apatite was derived from extracted human teeth with calcination method at 850 degrees C. DFSA and EFSA were separated and carefully ground with a blade grinder.

Structure and mechanical properties of Cresco-Ti laser-welded joints and stress analyses using finite element models of fixed distal extension and fixed partial prosthetic designs.

Statement Of Problem: The Cresco-Ti System uses a laser-welded process that provides an efficient technique to achieve passive fit frameworks. However, mechanical behavior of the laser-welded joint under biomechanical stress factors has not been demonstrated.

Purpose: This study describes the effect of Cresco-Ti laser-welding conditions on the material properties of the welded specimen and analyzes stresses on the weld joint through 3-dimensional finite element models (3-D FEM) of implant-supported fixed dentures with cantilever extensions and fixed partial denture designs.