Describe the different structures of the oral cavity that the dental laboratory technician requires from a final impression for a removable prosthodontic appliance, and compare these with the requirements for a fixed- prosthesis case.

Answer:

Both the methods used in making conventional impressions and digital impressions are shown in this presentation. The various impression materials are described and their suitability for fixed prosthodontic impressions is discussed. Materials described include irreversible hydrocolloid, reversible hydrocolloid, polysulfide, condensation reaction silicone, addition reaction silicone, polyether, and alginate substitutes. The design principles and methods for making custom impression trays are described. Impression methods are demonstrated in detail and are supplemented with a video demonstration.

Explanation:

The oral cavity is the initial phase of the digestive tract. Its major purpose is to act as the entry to the alimentary canal, allowing salivation and the propelling of the food substance into the pharynx to begin the digestion process. The oral cavity is enclosed by:

The different structures of the oral cavity include:

A dental laboratory technician is an experienced individual with a dental team who manufactures customized therapeutic and restorative dental appliances on prescription from a dental practitioner.

Removable prosthodontics focuses on the teeth replacement, in conjunction with soft tissues with a removable non-permanent prosthesis.

Removable prosthodontics appliances can be used for standard removable partial dentures for replacing missing teeth and this can help to avoid further surgery.

On the other hand, Fixed prosthodontics is the practice of repairing teeth with restorations that are permanently affixed to the patient's mouth. They're usually created in a laboratory by a dental laboratory technician who takes impressions to work with.

The difference between a removable prosthodontic appliance and a fixed prosthesis case is as follows:

removable prosthodontic                   fixed prosthesis case

It can be easily removed by            It requires a dental practitioner to

from the mouth when required        remove it.

Can lead to further jaw bone          It makes the jaw bone firm and intact

deterioration

Its cost is usually affordable but,   The cost is higher and it is a longtime

it has limited longetivity                 value.

From the above, explanation, we can conclude that we've understood what the different structures of the oral cavity are and how to make a comparison between the removable prosthodontic appliance and the fixed prosthesis case.

Learn more about the oral cavity here:

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