Cytoprotective Effect of Gallic Acid against Injuries Promoted by Therapeutic Ionizing Radiation in Preosteoblast Cells.

Gallic acid (GA) is a powerful antioxidant extracted from plants of the Brazilian Cerrado. Oxidative stress plays an important role in the occurrence of radiation-induced osteonecrosis in patients treated for head and neck cancer. There is a need to develop research aimed at developing complementary therapies to prevent or reverse bone damage.

Do dental implant therapies arouse signs and symptoms of temporomandibular disorders? A scoping review.

Objective: To delineate and discuss the literature about TMD in the context of dental implantology.

Methods: The PRISMA-ScR and Joanna Briggs guidelines for scoping reviews were used as methodological parameters. studies published in the English language showing interplay between dental implant therapy and TMD were included.

In-vitro comparison of mechanical resistance between two straight plates and a Y-plate for fixation of mandibular condyle fractures.

Objective: To compare the mechanical resistance of conventional plates with a modified Y-plate in mandibular condyle fracture.

Materials And Methods: 40 synthetic hemi-mandibular polyurethane replicates were used. Two groups of fixing materials were included: 20 mandibles fixed with 40 straight plates with four roles each (2.

Evaluation of cyclic and linear mechanical resistance of prebent and manually-bent plates used for maxillary advancement in orthognathic surgery.

The aim of the present study was to compare prebent and manually-bent plates used in maxillary advancement. The prebent plates were fixed in polyurethane blocks for the linear test and aluminium blocks for the cyclic test, and the manually-bent plates were fixed in polyurethane and aluminium blocks. The linear load tests were done using an Instron 4411 mechanical testing machine and the cyclic test with an Instron E3000 testing machine.

Mechanical and photoelastic analysis of conventional screws and cannulated screws for sagittal split osteotomy fixation: a comparative study.

Purpose: The aim of the present study was to use mechanical and photoelastic tests to compare the performance of cannulated screws with solid-core screws in sagittal split osteotomy fixation.

Methods: Ten polyurethane mandibles, with a prefabricated sagittal split ramus osteotomy, were fixed with an L inverted technique and allocated to each group as follows: cannulated screw group (CSG), fixed with three 2.3-cannulated screws; and solid-core screw group (SCSG), fixed with three 2.

Mechanical and photoelastic analysis of four different fixation methods for mandibular body fractures.

Objective: The aim of the present study was to compare four methods of fixation in mandibular body fractures.

Study Design: Mechanical and photoelastic tests were performed using polyurethane and photoelastic resin mandibles, respectively. The study groups contained the following: (I), two miniplates of 2.

Development plates for stable internal fixation: Study of mechanical resistance in simulated fractures of the mandibular condyle.

Objective: To develop Y-shaped plates with different thicknesses to be used in simulated fractures of the mandibular condyle. Ten plates were developed in Y shape, containing eight holes, and 30 synthetic polyurethane mandible replicas were developed for the study.

Material And Methods: The load test was performed on an Instron Model 4411 universal testing machine, applying load in the mediolateral and anterior-posterior positions on the head of the condyle.

Perception of oral and maxillofacial surgeons, orthodontists and laypersons in relation to the harmony of the smile.

Objective: Harmony is one of the main objectives in surgical and orthodontic treatment and this harmony must be present in the smile, as well as in the face. The aim of the present study was to assess the perceptions of professionals and laypersons in relation to the harmony of the smile of patients with or without vertical maxillary alterations.

Materials And Methods: Sixty observers (oral and maxillofacial surgeons, orthodontists and laypersons) reported the degree of harmony of six smiles using an objective questionnaire and the participants indicated if there was a need for corrective surgery or not.

Assessment of the fixation of mandibular symphysis fractures using conical cannulated screws: mechanical and photoelastic tests.

Objective: The aim of this study was to use mechanical and photoelastic tests to compare the performance of cannulated screws with other fixation methods in mandibular symphysis fractures.

Study Design: Ten polyurethane mandibles were allocated to each group and fixed as follows: group PRP, 2 perpendicular miniplates; group PLL, 1 miniplate and 1 plate, parallel; and group CS, 2 cannulated screws. Vertical linear loading tests were performed.

Fractographic analysis of 2.0-mm plates with a screw locking system in simulated fractures of the mandibular body.

Purpose: The purpose of the present study was to analyze the fractured plates from 2 brands of 2.0-mm locking fixation systems submitted to axial linear load testing.

Materials And Methods: Four aluminum hemimandibles with linear sectioning to simulate a mandibular body fracture were used as a substrate and fixed with 2 fixation techniques from 2 national brands: Tóride and Traumec.

Biomechanical strength analysis of mini anchors for the temporomandibular joint.

Introduction: The usage of mini anchors for the treatment of internal derangements of the temporomandibular joint (TMJ) is considered an innovative treatment, and it has presented excellent clinical results in the stabilization of the articular disc. This study aimed to evaluate, through mechanical tensile testing, the resistance of mini anchors for TMJ articular disc repositioning.

Materials And Methods: Ten thermoplastic polymer poly-ether-ether-ketone (PEEK) mini anchors were tested in artificial polyurethane blocks with a pullout test in a mechanical Instron™ machine, model 4411.