FrictionBursa of FabriciusBursa, SynovialLubricationBursitisLubricantsOrthodontic Appliance DesignStainless SteelChickensElastomersInfectious bursal disease virusSurface PropertiesBirnaviridae InfectionsOrthodontic BracketsViscosityPhysical PhenomenaMaterials TestingBiomechanical PhenomenaTextilesPhysicsDental AlloysPoultry DiseasesHeelStress, MechanicalSaliva, ArtificialSynovial FluidAdhesivenessWeight-BearingHydrodynamics