<prompt> Which type of composite is most useful in class V lesions in bruxism patients?Packable composites due to increased viscosityMicrofilled due to low modulus of elasticityMacrofilled due to low filler contentNone of the above  <response>: The low modulus of elasticity of microfilled composites allow them to flex with tooth and protect the bonding interface. This is most useful in bruxism, clenching and stressful occlusion where flexure forces are high. 