The mandibular denture is always the most difficult to construct. You have a tongue, less bone (than the maxillary), and a moving jaw.
The distobuccal borders of the tray are usually overextended. Notice how the mucobuccal fold runs right along side the retromolar pad. Do not encroach upon the masseter muscle. I usually visualize the mandibular distobuccal border as being concave or straight because of the masseter.
(On the technique model the tray was wide in the retromolar pad area. It will end up on the patient's cheek if you make it that wide.)
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©1999 by Julius Rosen, D.D.S.