Extension guidelines for a denture base minor connector: the buccal extension should extend approximately how many millimeters over the ridge crest?

Extension guidelines for a denture base minor connector: the buccal extension should extend approximately how many millimeters over the ridge crest?

• A. About 1 mm
• B. About 3 mm
• C. About 2 mm
• D. About 0.5 mm

Answer: (A)

Extending the buccal edge of the denture base minor connector just beyond the ridge crest is kept very small to balance stability with tissue health. About one millimeter beyond the crest provides enough reach to help the connector stay seated and engage with the major connector without pressing into or irritating the mobile buccal mucosa during function. If the extension were significantly greater, it could rub or compress the mucosa, cause soreness or ulcers, and potentially alter the seating of the denture. If it’s too small, the extension won’t contribute meaningfully to stability or proper contour, so you’d risk inadequate support without gaining any real benefit.

Extending the buccal edge of the denture base minor connector just beyond the ridge crest is kept very small to balance stability with tissue health. About one millimeter beyond the crest provides enough reach to help the connector stay seated and engage with the major connector without pressing into or irritating the mobile buccal mucosa during function. If the extension were significantly greater, it could rub or compress the mucosa, cause soreness or ulcers, and potentially alter the seating of the denture. If it’s too small, the extension won’t contribute meaningfully to stability or proper contour, so you’d risk inadequate support without gaining any real benefit.