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The border of the individual spoon on the lower jaw passes
- 2-3 mm above the transition fold
- 1-2 mm above the transitional fold, bypassing the buccal and labial mucosal strands
- 2-3 mm below the transition fold
- along the deepest part of the transitional fold, sinking into the soft tissues, bypassing the buccal and labial mucous cords
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