<prompt> A complete denture patient presents with angular cheilitis. A review of recent medical examination revealed that vitamin deficiency is not a factor. A possible predisposing factor is:Excessive vertical dimension of occlusionA closed or insufficient vertical dimension of occlusionImproper balance of the occlusionPoor contour of the denture base  <response>: A closed or insufficient vertical dimension of occlusion is thought to be the one predisposing condition for angular cheilitis, which usually is associated with Candida albicans.Improperly balanced occlusion or poor contour of the denture base are not predisposing conditions for angular cheilitis. 