artificial denture teeth dental material

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modified acrylics dental material

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artificial denture teeth dental material

  1. 1. Artificial Denture Teeth Artificially-made replacements for either anterior or posterior teeth' crowns. These replacements are usually retained to and supported by denture bases that replace the lost natural soft tissues.
  2. 2. Requirements of artificial teeth  Constructed of non-toxic, non-irritant and odorless materials.  Resemble the surrounding natural teeth in their shape, color and translucency.  Have high mechanical properties to resist the effect of masticatory forces.  Made of resilient material to minimize the stress transferred to the underlying tissues.  Have high wear resistance (high surface hardness)  Permit easy adjustment with dental burs or finishing stones.  Adhere to the denture base materials (i.e. provide chemical attachment with the denture base).  Own coefficients of thermal expansion matching to that of the denture base material.  Have low density to minimize the weight of the dentures especially the upper one.
  3. 3. Types of Artificial Teeth 1. Metallic 2. Acrylic 3. Porcelain Made of acrylic with; 1. White color 2. Low mol. wt 3. Low plasticizer contentUsed only in certain cases of RPD 4. Composite Teeth
  4. 4. porcelain teethAcrylic teethDifferences mechanically retainedchemically retainedretention to acrylic denture bases High density (heavy in wt.)Low density (light in wt.)Density (weight) - Not resilient - Could transmit the force causing alveolar bone resorption and soft tissue injury. - Should not be used in case of diabetic patient - Resilient - Preserve the alveolar bone and soft tissue. - Could be used in case of diabetic patient. Resiliency produce noisy during eatingQuiteNoisy highLowWear resistance highLowColor stability Difficult to be stainedEasy to be stainedStaining Can not be grind easily and difficult to be glazed Can be adjusted, grind and repolishedAdjustment and grinding low (porcelain is brittle)highImpact strength Different from that of acrylic denture base Similar to that of acrylic denture baseCoefficient of thermal expansion brittle and can not be used in cases of closed bite Strong, enough to be used in cases of closed bite Strength in thin section Differences among acrylic and porcelain teeth
  5. 5. Thank you

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