DHED 311: Specialty materials and radiographic appearance

Endodontics is

dental specialty that treats pathology of the pulp and periapical tissues

An RCT

removes the dental pulp and fills it

In a rct what is performed first

a pulpectomy (removal of pulp)

After a pulpectomy the canal is

shaped and filled

When the pulp is removed the canal space is prepared and shaped with

files and rotary instruments

What is put in the canal to fill the space?

Gutta percha

What is gutta percha cemented with

A sealer (Zinc Oxide Eugenol)

Why is gutta percha put into the canal space?

Prevents leakage of oral fluids into the periapical tissues.

Common irrigants used in a rct

-sodium hypochlorite

-Chlorhexidine

Silver points are

RCT filling material not used much today

Gutta percha contains

barium sulfate (radiopaque)

Silver points are composed of

66% zinc oxide

Silver points contain heavy metal salts that causes it to

corrode

What are treatment options if RCT fails?

-retreatment

-extraction

-apicoectomy + reftrofill

Apicoectomy

surgical procedure that removes 1-3 mm of root apex

retrofill

only apical portion of the canal is prepared (amalgam is put at end of root then)

Endodontic post

metal or fiber rods placed in the canal after a RCT to retain the core build up (under crown)

A post doesn't

-prevent fracture

-strengthen tooth

An endodontic post is NEVER used if

not enough tooth structure to retain the core

what are three types of posts

-custom cast posts

-preformed metal post

-non-metal post

Retention pins are

small metal screws that are placed in large restorations to retian the filling

retention pins

weakens the tooth

A dental implant MUST

osseointegrate