Tracing the periphery of the lower denture, commencing with the distobuccal aspect, the outlone necessary to conferm to the associated muscles is as follows.
The periphery runs downwards and outwards from the retro molar pad to the first molar region following the attachment of the buccinator muscle as it sweeps outwards from its region along the pterygo-mandibular raphe. The periphery forms an almost straight edge because the buccinator is flattened by the contracting masseter muscle. For this reason, this part of the periphery is sometimes known as the masseteric plane.
The periphery runs downwards and outwards from the retro molar pad to the first molar region following the attachment of the buccinator muscle as it sweeps outwards from its region along the pterygo-mandibular raphe. The periphery forms an almost straight edge because the buccinator is flattened by the contracting masseter muscle. For this reason, this part of the periphery is sometimes known as the masseteric plane.
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