Tooth Reduction for Fixed Partial Denture

Tooth Reduction

Amount of Preparation in Tooth Preparation for Fixed Partial Denture

Type of Restoration Facial Reduction Lingual Reduction Incisal / Occlusal Reduction
Acrylic Jacket Crown 0.75 – 1mm shoulder 0.75 – 1mm shoulder 1.5 – 2mm or 2/3 of the incisal 3rd

All ceramic fixed bridge with zirconium dioxide ceramic framework.


Type of Restoration Facial Reduction Lingual Reduction Incisal / Occlusal Reduction
Porcelain Fused to Metal Crown / Porcelain Fused to Metal Crown and Bridge 1.2 – 1.5mm shoulder 0.75 – 1mm chamfer Anterior – 1.5 – 2mm
Posterior:
Functional cusp – 1.5 – 2mm
Guiding cusp – 1 – 1.5mm
Complete veneer Metal Crown 0.75 – 1mm chamfer 0.75 – 1mm chamfer 1 – 1.5mm
Acrylic Facing with Metal Backing 0.75 – 1mm shoulder 0.75 – 1mm chamfer Ant. 1.5 – 2mm
Post. 1 – 1.5mm
IPS e.max Anterior Crown / Ceramics Crown and Bridge 1.2 mm shoulder or shoulder preparation with rounded inner edges 1.2 mm shoulder preparation with rounded inner edges 1.5 mm
IPS e.max Posterior Crown / Ceramics Crown and Bridge 1.5 mm shoulder or shoulder preparation with rounded inner edges 1.5 mm deep chamfer 1.5 mm – 2mm
All Porcelain with Zirconia Framework Crown / Ceramics Crown and Bridge (For Esthetics) 1.5 – 2 mm shoulder 1.5 – 2 mm shoulder 1.5 – 2 mm

E max Ceramics Contraindications
– Very deep, subgingival preparations (adhesive cementation)
– Patients with severely reduced residual dentitions
– Bruxism

Basic preparation guidelines for all-ceramic restorations
– no angles or sharp edges
– shoulder preparation with rounded inner edges and/or chamfer preparation
– the indicated dimensions reflect the minimum thickness for IPS e.max CAD restorations
– the incisal edge of the preparation, particularly for anterior teeth, should be at least 1.0 mm (milling tool geometry) in
order to permit optimum milling during CAD/CAM processing.

Reference
[1] Johnston J F et al: Modern practice in crown and bridge prosthodontics. WB Saunders Company
For more info about Tooth Reduction for Fixed Partial Denture, please read:
[2] Tooth Preparation for Fixed Partial Denture – http://costdentures.com/fixed/tooth-preparation-fixed-partial-denture/
[3] All Ceramic Fixed Partial Dentures – http://costdentures.com/fixed/all-ceramic-fixed-partial-dentures/

Written by:
Jesus Lecitona+, DMD, MScD-Prosthodontics
Email your questions about Tooth Reduction for Fixed Partial Denture at: jes[at]lecitona.com
Dentures Cost – http://costdentures.com/

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2 Responses

  1. Andrew S says:

    Great post! I probably recommend this site to my grandparents and also to friends. Thanks!

  1. January 24, 2013

    […] can be employed to connect parts of the denture to in the mouth, thereby forming a functional fixed dental prosthesis. 3. Screw assemblies may be used to allow the prosthesis to be removed by the dentist. This can be […]

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