LIMITING STRUCTURES – MUSCLES1. Mentalis Muscle: The mandibular anterior area from left buccal frenum to right buccal frenum.2. Buccinator Muscle: The determination of the depth & width of both max & mand denture into the buccal vestibule is the buccinator muscle; thereby preventing food lodgement there.3. Massetric muscle: Distobuccal flange of denture is limited by this muscle. If over-extended, the patient experiences extreme soreness.4. Genioglossus Muscle: Denture extension into the lingual vestibule is determined by the genioglossus muscle (1st PM to contralateral side 1st PM).5. Mylohyoid Muscle: Denture extension in the alveo-lingual sulcus is determined by oral diaphragm / mylohyoid muscle.6. Retromylohyoid Area :a. Superior Constrictor Muscle: Disto-lingual aspect of mandibular denture is determined by the superior constrictor muscle of the pharynx.b. Palatoglossus Muscle: Post most extension is determined by palatoglossus; whereas post most height is determined by 2/3rd of the retromolar pad.

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