Lesson 10 Flashcards
a restoration that covers all coronal tooth surfaces (mesial, distal, facial, lingual)
FULL VENEER CROWN
→ can be used as a single unit or as a retainer for fixed partial denture
→ offers the most effective retention and resistance form of all extra-coronal restorations
FULL VENEER CROWN
→ used where alignment and tooth form is not ideal
→ extensive alteration in tooth form and occlusion
FULL VENEER CROWN
affords most effective retention and resistance form of all extracoronal restorations
ADVANTAGES of FULL VENEER CROWN
→ can be used in situations in which tooth form and alignment are not ideal and when a less than perfect preparation is a likely result
→ can be used to make relatively extensive alterations in tooth form and occlusion
ADVANTAGES of FULL VENEER CROWN
→ cast full metal lack of esthetic qualities
→ extensive tooth preparation
→ long finishing lines extending below the gingival crest
DISADVANTAGES of FULL VENEER CROWN
→ proximal reduction
→ facial and lingual reduction
→ occlusal reduction
→ smoothening the preparation and rounding line angles
SEQUENCE OF TOOTH REDUCTION
taper occlusally 3-5 degrees
PROXIMAL REDUCTION
depth cuts placed 0.7 to 1.0 mm in occlusal aspect and
decreases cervically by 0.3 to 0.5 in depth
FACIAL AND LINGUAL REDUCTION
→ minimum of 1 to 1.5 mm in centric and eccentric mandibular movement
→ tapered round-end diamond instrument parallel to occlusal grooves
OCCLUSAL REDUCTION
SMOOTHENING OF THE PREPARATION AND ROUNDING LINE ANGLES should use?
finger grit
use of modifications such as boxes, grooves or pinholes to provide increased retention and resistance form
AUXILIARY RETENTION AND RESISTANCE FORM
→ labial/buccal depth guide
→ proximal reduction
→ labial/buccal reduction
→ incisal/occlusal depth guide → incisal/occlusal reduction
→ lingual reduction
→ shoulder preparation/finish line
→ finishing/smoothening
FPD LAB SEQUENCE
Super Fine
white
Extra Fine
yellow
