Changes in the Force Degradation of Orthodontic Elastomeric Chains Subjected to Different Formulations of Chlorhexidine Mouth Rinse: an in Vitro Study

Introduction: The aim of this study was to assess whether various formulations of chlorhexidine mouth rinses had an effect on force characteristics of the elastomeric chains. Methods: The sample consisted commercially available elastomeric chain of 3M Unitek with five commercially used chlorhexidine mouth rinses of different formulations. The e chain were stretched on artificial saliva .30 sec everyday exposure to different chlorhexidine formulation was tested by digital dynamometer and was statisticaly evaluated using ANOVA test. Conclusion: mouthwashes does not accelerate force degradation of elastomeric chains which could clinically affect their effectiveness. However, the results could be variable in the presence of other biological factors in the oral environment and their interactions between oral microorganisms with the host

Assessment of stress changes in dentoalveolar and skeletal structures of the mandible with the miniplate anchored Forsus: A three-dimensional finite element stress analysis study

Objective: The study conducted to assess the effects of a fixed functional appliance (Forsus Fatigue Resistant Device; 3M Unitek, Monrovia, CA, USA) on the mandible with three-dimensional (3D) finite element stress analysis. Materials and Methods: A 3D finite element model of mandible with miniplate at mandibular symphysis was prepared using SolidEdge software along with the plate geometry. The changes were deliberated with the finite element method, in the form of highest von Mises stress and maximum principal stress regions. Results: More areas of stress were seen in the model of the mandible at cortical bone in canine region at bone and miniplate interface. Conclusions: This fixed functional appliance studied by finite element model analysis caused more von Mises stress and principal stress in both the cortical bone and the condylar region