Prosthodontics

Most Tested Values

• 6 gauge lingual bar - standard specification
• <90° rest seat angle - prevents food impaction
• 0.010 inch undercut - optimal retention
• ⅔ guide plane length - adequate guidance
• 1.5 mm acrylic thickness - tissue adaptation
• ≥8 mm palatal strap - adequate strength

Procedural Sequences

• Surveying: Guiding plane → path of insertion
• Construction: Stress-bearing design → framework → tissue contact
• Retention: Direct (clasps) + Indirect (rugae area)

Design Principles

• Far from fulcrum = better indirect retention (rugae area)
• Gingival third = optimal retention zone
• Broad buccolingually = minor connector strength
• Complete palate = maximum rigidity
• Stress-bearing first = foundation principle

Clinical Correlations

• Rugae = indirect retention - anatomical advantage
• Guiding planes = predictable insertion path
• Bennett shift = lateral mandibular movement
• Translation motion = superior TMJ compartment
• Facebow = axis-orbital plane transfer