Record Base Introduction
Record base can be fabricated with various materials and methods. Wax occlusal rims are fabricated on records bases and jaw relation is recorded which is transferred on articulators. Artificial teeth are arranged on these records bases and trial is done. Record bases should be fabricated accurately to judge denture retention, stability, and esthetic.
Table of Contents
Record Base Definition
A material or device is representing the base of a denture. It is used for making maxillomandibular relation records and arranging teeth.
Record Base Classification
Based on Material:
The record base can be classified based on material used to fabricate it as given in Flowchart.
Read and Learn More: Preclinical Prosthodontics Notes
Based on Use:
The record base can be classified according to use as given in Flowchart.
Note: Permanent record bases are not discarded after dewaxing but it becomes part of finished complete denture.
Denture base can be temporary and permanent. Temporary record base is made up of shellac, self-cured acrylic resin, vacuum formed vinyl and polystyrene, and base plate wax. This will be removed after dewaxing procedure and replaced by heat-cured acrylic resin to be a part of processed denture. All metallic denture bases and processed heat cure denture base are permanent denture bases. These will not be replaced after dewaxing but denture will be made and cured on these only.
Note: Temporary record bases are discarded during dewaxing procedure (after jaw relation, teeth arrangement, and try in procedure is done) and replaced by denture base material
Denture Bases Diagnostic Uses
- It can give idea about overextension or underextension of border of first impression. Operator can get idea about the correctness of primary impression/primary cast as record base is made on primary cast.
- Patient and dentist both can get idea about acceptance and response to final denture. If patient has exaggerated gag reflex, dentist can know it with record base extension only and guide patient to manage with denture base and final denture.
- If patient is suffering from xerostomia, the final retention can be predicted and preventive measures can be taken before final denture insertion.
- Record base helps in establishing jaw relation record.
- It helps in recording of centric relationship.
- Allow setting of artificial teeth on it for wax trial.
Denture Bases Ideal Requirements
- It should be well adapted and accurately formed on final cast.
- It should be rigid and dimensionally steady.
- It should be stable on cast and on denture foundation in oral cavity.
- It should be free of voids on the surface that contact the oral mucosa.
- It should have smooth and rounded borders.
- It should be easily removable from cast.
- It must reproduce accurately the landmarks of final cast.
Advantages And Disadvantages Of Denture Bases
The advantages and disadvantages of denture bases are listed in Table.
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