3. Care should be taken when polishing the denture to prevent undesirable modifications in tooth contour. METAL INSERT TEETH: Advantages: 1. Improved wear resistance. 2. Improved masticatory efficiency. 3. Not as sound producing as porcelain teeth. Disadvantages: 1. Increased cost. 2. Not as esthetically accepted as other teeth. TEETH ARRANGEMENT Definition In prosthodontics the term “arrangement� would refer to a procedure of locating, tilting, rotating and spacing an artificial tooth/teeth in relation to the plane of reference and to each other with the object of creating a natural appeal and based on biomechanical requirements of complete denture treatment. 1. General position of each of the tooth is such that the imaginary root passes through restored ridge contour of maxillary foundation. 2. Relation of tooth to the frontal plane: a. Maxillary labial incisor. -
Slight labial inclination.
b. Lateral incisors 13