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Construction of Base Plates and Occlusal Rims

Construction of Base Plates and Occlusal Rims. DA122 Dental Materials. Base plate and occlusal rims. One of first steps in construction of dentures Base plate-represents body of denture Occlusal rim-wax block. Used by lab technician to place denture teeth. Steps.

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Construction of Base Plates and Occlusal Rims

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  1. Construction of Base Plates and Occlusal Rims DA122 Dental Materials

  2. Base plate and occlusal rims • One of first steps in construction of dentures • Base plate-represents body of denture • Occlusal rim-wax block. Used by lab technician to place denture teeth

  3. Steps • The teeth are articulated in the lab, tested in the patient’s mouth-final fittings completed • Last step-construction of dentures: • Investment or covering of rims • Wax is replaced by acrylic-forms denture base

  4. Denture Teeth • Setting teeth in wax

  5. Video • http://www.youtube.com/watch?v=KV_tCpfnh5w

  6. Lab Activity • 1. Prepare edentulous model • Use marker or pencil to mark around area where denture will fit • Sprinkle model with baby powder • 2. Soften a half sheet of baseplate wax with alcohol torch • Using gloved fingers press wax onto form • 3. Trim excess wax with a lab knife or scalpel • 1/6 to ¼ inch around mucobuccal fold area

  7. Lab continued • 4. Contour wax into mucobuccal fold-pressing against plate and conforming to pencil line • Use a pencil eraser • Do not tear wax

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