Anterior crowns
Unit anterior bridges
3 Unit anterior bridges
3 Unit premolar bridges
Implant superstructure for single restorations


CLINICAL GUIDELINES

  • Evenly reduce the anatomical shape and observe the stipulated minimum thicknesses.
  • Prepare a circular shoulder with rounded inner edges or chamfer with an angle of approx. 10°–30°.
  • The width of the circular shoulder/chamfer is approx 1mm.
  • Reduction of the crown third – incisal or occlusal areas – by approx 2 mm. For anterior crowns, the labial and palatal/lingual part of the tooth should be reduced by approx 1.5 mm.
  • In the anterior region (up to the canine), the bridge pontic width should not exceed 11 mm.
  • In the premolar region (from the canine up to the 2nd premolar), the bridge pontic width should not exceed 9 mm




Partial crown

Provide at least 1.5 mm of space in the cusp areas. Partial crowns are indicated if the preparation margin is less than approx. 0.5 mm away from the cusp tip, or if the enamel is severely undermined. The shoulder should be preparedwithout a chamfer, i.e. in a 90° angle to the residual tooth structure.

Anterior and posterior crowns

The anatomic shape is evenly reduced while observing the given minimum framework thickness. A circular shoulder is prepared with rounded inner edges or a chamfer at an angle of 10-30º: The width of the circular shoulder/chamfer isapprox. 1.0 mm. Reduction incisal or occlusal by approx. 1.5 mm. The vestibular or lingual reduction is approximately 1.2 mm for anterior teeth and approximately 1.5 mm for posterior teeth. The incisal edge of the preparation should be atleast 1.0 mm (milling tool geometry) in order to permit optimum milling of the incisal edge during CAD/CAM processing.