Prosthetic IV. addition
Removable dentures I. and II.
Removable dentures
• Removable partial dentures
• Complete denture
Removable dentures - classes
• Class I-
• Dental arch with gaps (interruptions)
• Teeth supported (borne) dentures
• Class II.
• Reduced (shortened) dental arch
• Teeth and tissue supported (borne) dentures
Removable dentures - classes
Class III.
Single teeth
Loss of the most important abutment teeth (big gaps - more than 4 teeth)
Mostly tissue (borne) dentures, sometimes teeth supported additionally
Class IV.
Complete denture Tissue supported (borne)
Clasp - three armed cast
One part for retention (going under the maximal convexity)
One part for stabilization against horizontal forces (upon the maximal convexity)
On arm for transmission of occlusal forces
(the rest)
Class I and II dentures with the metal framework
Class I. denture Components:
Class I and II dentures with the metal framework
Lingual plate
Class I and II dentures with the metal framework
Minor connector Anterior palatal bar
Posterior palatal bar
Sequences of operations
Taking impressions (alginate.
Sequences of operations
Pouring - gypsum models.
Fabrication of the individual impression tray
if necessary.
If not, fabrication of the bite template:
The bite template is necessary for The registration of the intermaxillary Relationship.
It consist of the shellack base and the wax walls.
Sequences of operation
• Registration of the intermaxillary relationship.
Sequences of operation
Preparation of the model for backup.
All undercuts are blocked out
Also the space
under the future framework
Using heated wax
Sequences of operations
• Backup using the reversibile impression agar based material in a special flask
• Pouring of this impression with -the investing material - casting model
Sequences of operations
Fabrication of the wax pattern of the metal framework. /
Sequences of operations
• Investment with the same investing material -a special flask.
The wax is burnt out and the form is heated in a special oven.
After that the casting process is performed using a special casting machine.
Sequences of operation
After casting and cooling the framework is taken out, the inflow system must be cut off.
Sequences of operation
• The cast is grinded, polished and adapted on the former gypsum model
The final framework is tried out
Sequences of operation
The arteficial teeth will be applied acc. to intermaxillary registrate in articulator.
Sequences of operation
• After trying out of the denture with wax base and teeth the denture is completed
The framework with the wax pattern of the base and teeth has been put into a flask, the wax has removed and replaced with a resin dought. The resin base is polymerized using heating.
Sequences of operation
The denture is finished, polished and tried in.
Feedback
• For which classes of removable dentures is necessary to fabricate the metal framework?
• On which model is the wax pattern of the framework made?
• What is the method of „lost wax" ?
Feedback
• Which parts does the partial removable denture consist of?
• Describe the sequences of operations of these dentures. Explain the main difference between class I. and II. removable dentures.
• What is the purpose of the bite template? Which part does it consist of?
• Explain the term Jnvestment".