The presence of joint pain, obscure discomfort, and clicking sounds in a complete denture patient often indicates alteration in the temporomandibular joint (TMJ) function, commonly caused by an increased vertical dimension of occlusion. An increased vertical dimension places excessive strain on the TMJ and the associated musculature, leading to pain and joint noises such as clicking. Checking and correcting the vertical dimension helps in restoring the proper mandibular position and alleviates these symptoms. Therefore, evaluating the denture for increased vertical dimension is crucial in managing TMJ-related complaints in denture wearers.

Reference: Prosthodontics, Shillinburg, Edition 5.