Forensic study of the mechanical properties of prosthetic materials: Submersion in mangrove environment - A pilot study.

Introduction: It is crucial for dental surgeons to use the mechanical properties of dental prosthetic materials to correlate the submersion time in a mangrove environment.

Objective: This study aimed to submerge dental prosthetic materials, such as acrylic resin and zirconia, contained within acrylic resin disks in a mangrove environment, and analyze the alterations in mechanical parameters, such as surface roughness and microhardness, to estimate submergence time in similar forensic situations.

Materials And Methods: A total of 6 specimens was embedded in acrylic resin disks numbered from 1 to 6.

Are There Differences in Fracture Patterns in Mandibular Ramus Sagittal Osteotomies Between Hunsuck/Epker, Wolford, and Posnick Modifications?

Purpose: Despite decades of study, the best technique for mandibular ramus sagittal osteotomy has not been definitively determined. The purpose of the present study was to compare fracture patterns, inferior alveolar nerve (IAN) visualization, and torque required for mandibular sagittal splitting using the Hunsuck/Epker, Wolford, and Posnick techniques.

Methods: This was a laboratory (ex vivo), randomized, a single-blind study performed to evaluate sagittal split osteotomies in porcine mandibles using a specifically designed test system.

Treatment of the Temporomandibular Joint Ankylosis with a Customized Prosthesis in a Single Stage: The Use of 3D Cutting Guides and Virtual Surgical Planning.

Background: Ankylosis of the temporomandibular joint (TMJ) is a debilitating condition and disabling as a result of craniomandibular fusion, which can result in trismus, pain and a poor quality of life. Current management includes interposition arthroplasty, gap arthroplasty, and reconstruction. Traditionally, the joints are reconstructed with pre-made prostheses (in stock), or the procedure is performed in two steps; with a computerized tomography scan, its design is observed between the respective and reconstructive procedures.

Mini-Anchors to Surgically Treat the Chronic Mandibular Dislocation.

Purpose: Evaluate the feasibility of using mini-anchors for the treatment of chronic mandibular dislocation and to identify the variables that affect the success of this approach.

Patients And Methods: A retrospective cohort study evaluated 9 patients with bilateral recurrent dislocation of the mandible (18 operated joints), treated by a mandibular translation control system using the mini-anchor technique. Data was collected using a Visual Analog Scale (VAS) for subjective parameters and measurements for objective parameters prior to surgery (T1) and at the longest available follow-up (T2) with a minimum of a 12 months interval.

Development and validation of a new formula for sex estimation based on multislice computed tomographic measurements of maxillary and frontal sinuses among Brazilian adults.

Objectives: To evaluate the accuracy of the measurements of the maxillary sinus (MS) and frontal sinus (FS) in sex estimation among Brazilian adults using multislice computed tomography (MCT) and to develop and cross-validate a new formula for sex estimation.

Methods: The present cross-sectional research was conducted in two phases: (1) development of a formula on the basis of the measurements of both the sinuses (50 males and 50 females); and (2) validation study (20 males and 20 females). The linear measurements (height, width and diameter) were assessed using the RadiAnt DICOM software.

Photobiomodulation Therapy Reduces the Inflammatory Process without Inhibiting Bone Deposition in Rats in an Extraction Model.

We evaluated the influence of photobiomodulation therapy (PBMT) application during bone healing postexodontia in rats. We divided 84 male Wistar rats into a control group (CG), which received placebo treatment without PBMT, and a test group (TG), which was treated with PBMT. After exodontia, the animals were subjected to PBMT (TG) with an AsGaAI diode laser at 810 nm, 100 mW, 2 J, and 70 J/cm or placebo treatment (CG) every 72 h.

Performance and comparison of the London Atlas technique and Cameriere's third molar maturity index (I) for allocating individuals below or above the threshold of 18 years.

Age estimation is an important procedure in the forensic practice, especially when it comes to the criminal imputability of juvenile offenders. This study aimed to compare two radiographic methods for dental age estimation in a population of subadults from Northeast Brazil considering their performance on allocating individuals below or above the age threshold of 18 years. A cross-sectional observational study was designed.

Maxillofacial and dental-related injuries from a Brazilian forensic science institute: Victims and perpetrators characteristics and associated risk factors.

Background: Trauma due to external causes represents one of the greatest challenges for public health services in different regions around the world. This study aimed to determine the prevalence of facial trauma, associated risk factors, and classification of body injuries in individuals who underwent forensic examination in a Brazilian center.

Material And Methods: Data were collected at the Ceará State Forensic Medicine unit in a 12-year period.

Forensic study of mechanical properties of dental fillings after immersion in marine environment.

Human identification and postmortem intervals can be difficult to estimate when corpses are found in drowning situations, and forensic odontologists can bring valuable input to forensic science investigations of this type. Studies that simulate real scenarios are crucial for providing parameters that can be used in real cases. The present study created the necessary circumstances, i.

Forensic study of mechanical properties of dental restoration after burial in mangrove environment.

Conducting research in the field of forensic sciences with methodologies that simulate situations found in the day-to-day practice of a given field of expertise is relevant insofar as this approach can produce results that are as close as possible to reality. In this context, the present study provided situations based on burial in a mangrove environment to estimate the changes in the mechanical properties (Knoop microhardness, roughness and color) of dental restorations utilizing silver amalgam, composite resin and glass ionomer cement over the time of burial. The silver amalgam showed a significant increase in surface roughness and a reduction in Knoop microhardness.

Does the Preemptive Use of Oral Nonsteroidal Anti-inflammatory Drugs Reduce Postoperative Pain in Surgical Removal of Third Molars? A Meta-analysis of Randomized Clinical Trials.

The purpose of this study was to investigate the effectiveness of preemptive analgesia with nonsteroidal anti-inflammatory drugs (NSAIDs) in third-molar surgery. A PubMed literature search was conducted for articles restricted to the English language using the following terms (DeCS/MeSH) or combinations: analgesia, third molar, and preemptive. From a total of 704 articles, 6 (n=420 subjects) were selected.

Postoperative hemostatic efficacy of gauze soaked in tranexamic acid, fibrin sponge, and dry gauze compression following dental extractions in anticoagulated patients with cardiovascular disease: a prospective, randomized study.

Introduction: Oral anticoagulants are widely prescribed drugs. Interruption of anticoagulant therapy prior to oral surgery has been an issue of great controversy. The purpose of this study was to evaluate the incidence of bleeding complications after dental extractions in patients on anticoagulant therapy (warfarin) in whom different local hemostatic methods were used.

Correlation between radiographic signs of third molar proximity with inferior alveolar nerve and postoperative occurrence of neurosensory disorders: a prospective, double-blind study.

Purpose: To evaluate the interference of radiographic factors in the appearance of sensory deficit related to inferior alveolar nerve (IAN) after third molars (3Ms) removal.

Methods: A prospective, double-blind, observational, unicentric study was performed with 126 patients submitted to a surgical procedure of lower 3Ms removal in the period from March to October/2011. Collected data included gender, age, eruption stage of 3Ms, position/angle of 3Ms (Pell-Gregory and Winter classifications, respectively), presence/absence of radiographic signs of 3Ms proximity with the inferior alveolar canal and surgical technique.

The use of Le Fort I Approach in the resection of an extensive ossifying fibroma.

Introduction: Ossifying fibroma (OF) is a well-defined benign neoplasm characterized by slow growth and predilection for the posterior mandible site, usually treated by conservative surgical approaches. In this context, Le Fort I Approach (LFIA) has been increasingly used providing good visualization and an easy access to the lesion. It also allows removal of the lesion quickly.

Rare hybrid odontogenic tumor in a 2-year-old child.

Hybrid odontogenic tumors are rare conditions that can affect the oral maxillofacial region and usually occur in adults as an asymptomatic swelling. Hybrid odontogenic tumors exclusively involving adenomatoid odontogenic tumor (AOT) and calcifying cystic odontogenic tumor (CCOT) are rare, with only 4 reported cases. In addition, there are only few studies describing the presence of abortive enamel in AOT and, to our knowledge, CCOT was not present in any of them.