In vitro measurement of the initial forces and moments generated for a curve of Spee malocclusion with labial and lingual archwire forms.

Objectives: To compare the biomechanics of labial and lingual fixed orthodontic treatment options for a simulated curve of Spee malocclusion.

Materials And Methods: An in vitro electromechanical orthodontic simulator was used to measure the three-dimensional forces and moments on each tooth of a mandibular arch. Labial and lingual brackets, both with 0.

The in vitro biomechanics of anterior arch expansion using fixed lingual appliances with coil springs or archwire stops.

Introduction: The presented study investigates differences in the biomechanics of straight and mushroom fixed lingual appliances when implementing coil springs and stops for anterior arch expansion.

Materials And Methods: An in vitro orthodontic simulator was used to measure three-dimensional forces and moments on each tooth of a simulated maxillary arch. Mushroom and straight archwire forms of 0.

Is it safe to place implants in patients at risk of MRONJ?

Data sources Four electronic databases, namely PubMed, Scopus, Web of Science and the Cochrane Central Register of Controlled Trials, were searched from their inception to 16 July 2019. The OpenGrey database was also used to identify unpublished studies.Study selection Eligible study designs included randomised controlled trials, cohort studies, case-control studies and case series with a retrospective, cross-sectional or prospective design related to implant placement in patients with a history of anti-angiogenic or antiresorptive medications.

The biomechanics of posterior maxillary arch expansion using fixed labial and lingual appliances.

Objective: To compare the biomechanics of straight labial, straight lingual, and mushroom lingual archwire systems when used in posterior arch expansion.

Materials And Methods: An electro-mechanical orthodontic simulator allowing for buccal-lingual and vertical displacements of individual teeth and three-dimensional force/moment measurements was instrumented with anatomically shaped teeth for the maxillary arch. In-Ovation L brackets were bonded to lingual surfaces, and Carriere SLX brackets were bonded to labial surfaces to ensure consistency of slot dimensions.

Are COVID-19 test results masking important issues?

Basic health and infection control measures are the main methods of protection against COVID-19. Patients are well informed about how practitioners should be conducting themselves, however, they may lose trust in clinicians who fail to demonstrate, and promote those same basic prevention measures. The broader COVID-19 strategy has included the rapid development and deployment of swabs and antibody tests.

Measurement of forces and moments around the maxillary arch for treatment of a simulated lingual incisor and high canine malocclusion using straight and mushroom archwires in fixed lingual appliances.

Introduction: An Orthodontic SIMulator (OSIM) was used to investigate the propagation of forces and moments around a simulated archform for a gingival displaced canine and lingual displaced lateral incisor using fixed lingual orthodontic appliances.

Methods: In-Ovation L self-ligating lingual brackets were bonded to anatomically shaped teeth on the OSIM, and the teeth were positioned such that a G4 NiTi 0.016" large maxillary mushroom archwire could be ligated in passive position.

A protocol for determining the surface free energy of dental materials.

Objective: The purpose of this study was to develop a standard methodology for measuring the surface free energy (SFE), and its component parts, of dental biomaterials.

Methods: The contact angle of each of four samples of two materials--low density polyethylene and poly(methyl methacrylate)--was measured three times in each of six liquids (1-bromonaphthalene, diiodomethane, ethylene glycol, formamide, glycerol and distilled water). Critical surface tension estimates were obtained from Zisman plots.