When designing a denture base minor connector, what are the recommended buccal and lingual extensions?

When designing a denture base minor connector, what are the recommended buccal and lingual extensions?

• A. Buccal extension about 1 mm over the ridge crest; Lingual extension about 2 mm short from the border
• B. Buccal extension about 2 mm over the ridge crest; Lingual extension about 1 mm short from the border
• C. Buccal extension about 0.5 mm over the ridge crest; Lingual extension about 3 mm short from the border
• D. Buccal extension about 3 mm over the ridge crest; Lingual extension flush with the border

Answer: (A)

Designing the denture base minor connectors balances retention with tissue comfort. The buccal extension should cross just over the ridge crest by about 1 mm so it engages the soft tissue enough to help resist displacement without intruding into the crest where it can irritate or trap food. The lingual extension should be kept about 2 mm short of the border to allow proper border molding and tongue movement, preventing impingement on the floor of the mouth or the lingual frenum. This combination provides stability and a good seal without overdoing tissue coverage or causing irritation. Extensions that are too large can irritate mucosa and hinder border movements, while extensions that are too small or flush with the border can reduce retention and stability.

Designing the denture base minor connectors balances retention with tissue comfort. The buccal extension should cross just over the ridge crest by about 1 mm so it engages the soft tissue enough to help resist displacement without intruding into the crest where it can irritate or trap food. The lingual extension should be kept about 2 mm short of the border to allow proper border molding and tongue movement, preventing impingement on the floor of the mouth or the lingual frenum. This combination provides stability and a good seal without overdoing tissue coverage or causing irritation. Extensions that are too large can irritate mucosa and hinder border movements, while extensions that are too small or flush with the border can reduce retention and stability.