Finish lines in FPD
Your Ad Here

Finish lines in FPD

Finish Lines

Fixed Partial Denture

FINISH LINES IN FPD 

Finish LineIndicationsAdvantagesDisadvantages
Shoulder
  • All ceramic crowns
  • PFM crowns
  • Injectable porcelains
  • Good crown contours
  • Esthetics
  • Less distortion
  • Provides adequate bulk
  • Least conservative
  • Inferior marginal adaptation
Shoulder with bevel
  • Proximal boxes of onlays and inlays
  • Labial finish line of metal ceramics
  • Occlusal shoulder of onlays
  • Superior marginal adaptation
  • Resists distortion
  • Facilitates removal of unsupported enamel rods
  • Requires subgingival extension
  • Detection of post cementation caries is difficult
Chamfer
  • Cast metal restorations
  • Lingual aspect of metal ceramics
  • Conservative
  • Good marginal adaptation
  • Provides bulk
  • Improper fabrication may result in an unsupported tip
Knife edge
  • Young patients
  • MOD onlay
  • Inaccessible area
  • Finish lines in cementum
  • Conservative
  • Ideal for marginal adaptation
  • Does not provide a distinct finish line
  • Waxing, polishing and casting becomes critical
  • Overcontoured restoration in an attempt to obtain bulk

[Shillingburg 3rd ed 132]

 

Further Reading:

IDA

 

Your Ad Here