T6: Reline & Rebase

Question 1

What is reline?

Answer 1

• adding new base material to tissue surface of an existing denture in a quantity sufficient to fill space which exists between original denture contour and altered tissue contour

Question 2

What is rebase?

Answer 2

• replacing entire denture base material of an existing denture

Question 3

Types of relines

Answer 3

1. temporary
2. soft
3. permanent

Question 4

Temporary Reline

Answer 4

• tissue conditioning for when grossly ill fitting dentures
• post immediate dentures
• after Imp surgery

Question 5

Soft Reline

Answer 5

• useful if parafunctional habits
• very atrophic ridges
• in cancer/ cleft patients

Question 6

Disadvantages of soft reline

Answer 6

• plastisizer leaches
• deteriorate with time
• habour microorganism

Question 7

Soft Lining materials

Answer 7

Question 8

Permanent Reline (lab based)

Answer 8

• usually hard acrylic
• useful in peripheral seal problems
• inadequate master impression: correction of erros
• immediate/ post-immediate dentures
• prolongs lifespan of some older dentures

Question 9

Rebase technique Clinical aspect

Answer 9

• before taking imp, undercuts are removed from denture
• wash impression taken using close mouth technique
• imp poured in stone
• overcast in plaster is used
• overcast is then separated
• denture is then removed to reveal working model
• Post dam is carved at junction of hard and soft palate
• fitting surface and palate removed to allow space for new acrylic
• the cut back denture is then placed back onto overcast
• sticky wax is used to hold denture in place
• gaps are filled with wax
• overcast can be removed to maintain position of denture in relation to model and maintain vertical dimension
• palate is added in wax
  ** check lecture slides