Fig. 1 Fig. 2 Cheek and labial muscle function Retromolar pad Buccal shelf Alveolar ridge Alveololingual sulcus Frenum Labial vestibule Vibrating line Hamular notch Fig. 3: Dr. Thompson's Color Transfer Applicators. Fig. 4 Bone of the tuberosity Mucosa Hamular notch Fig. 5: Anatomy of the hard palate, soft palate and posterior palatal seal area. Immovable soft palate- posterior palatal seal area Movable soft palate the lab to create an accurately placed posterior denture border and a post dam on the maxillary denture (a raised area on the tissue side along the posterior border of the maxillary denture), which compresses the tissues of the posterior palatal seal area and the hamular notches and improves retention of the denture. Locate the hamular notches: Firmly place The vibrating line is the junction of the immovable soft palate and the movable soft palate. Using indelible ink (Fig. 3) to mark these extensions on the tissues allows for precise transfer to the master casts, aiding the laboratory in contouring the denture base properly for maximum denture retention and patient comfort. Maxillary denture posterior extension: To enhance maxillary denture retention and increase the predictability of denture success, the dentist should indicate on the master cast the posterior border of the denture at the vibrating line and the hamular notches. Th is enables a dental mirror against the maxillary alveolar ridge crest and slide the mirror posteriorly across the tissues of the ridge and the tuberosity into the compressible tissues of the hamular notch, which is distal to the tuberosity (Fig. 4). Th en, mark the hamular notch with indelible ink to indicate the posterior extension of the maxillary denture in the hamular notch area. Locate the vibrating line: Th e posterior extension of the maxillary denture between the hamular notches should be located at the vibrating line, which is the junction of the movable and the immovable soft palates (Fig. 5). To locate the vibrating line, instruct the patient to make JUNE 2024 | 41 | DENTALTOWN.COMhttp://www.DENTALTOWN.COM