Abstract
The following conclusions were obtained by observing the shape of abutment teethin various regions on plaster models which had been used for fabrication of single-unit, prosthetic restorations of full-coverage crowns.
The average value for the mesiodistal taper of the maxillary teeth tended to increase in the posterior teeth.
The average value for the faciolingual taper of the maxillary teeth were larger than those for the mesiodistal taper. In the mandible, the valueof the taper from the central incisors to the second premolars were about 15° and the molar region was 25°.
The height of the abutment teeth was greater for the canines and central incisors, it became less moving towards the posterior teeth.
The clinical preparation of abutment teeth, there was a small taper in the anterior teeth where the height of the crown was large, while the taper tended to become larger in the posterior teeth where the height of the crown was smaller.
