Internal finish line for the maxilla should be located relative to the external finish line?

Internal finish line for the maxilla should be located relative to the external finish line?

• A. Slightly more palatal to the external finish line
• B. Distal to the external finish line
• C. Facial to the external finish line
• D. At the same level as the external finish line

Answer: (A)

The finish line position of the maxillary denture border determines how the border sits in relation to the tooth margins and the palatal tissues. For the maxilla, the internal finish line should be placed slightly more palatal than the external finish line. This position gives room for the palatal extension of the denture base, allowing a thicker, well-adapted acrylic border that can seal effectively against the palatal mucosa. It also helps prevent an exposed or irritating edge on the facial surface and supports better retention and comfort. If the internal finish line were at the same level, more facial, or distal to the external line, the border could crowd the gingival margin, compromise the seal, or create a thinner, less durable border.

The finish line position of the maxillary denture border determines how the border sits in relation to the tooth margins and the palatal tissues. For the maxilla, the internal finish line should be placed slightly more palatal than the external finish line. This position gives room for the palatal extension of the denture base, allowing a thicker, well-adapted acrylic border that can seal effectively against the palatal mucosa. It also helps prevent an exposed or irritating edge on the facial surface and supports better retention and comfort. If the internal finish line were at the same level, more facial, or distal to the external line, the border could crowd the gingival margin, compromise the seal, or create a thinner, less durable border.