Ceramic Crowns in Dentistry

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Questions and Answers

What is the process called when a ceramic is removed by a dentist?

Drilling (correct)

Shaping

Filling

Curing

What is the result of firing powder at a very high temperature?

It stays in powder form

It becomes a solid object (correct)

It becomes a liquid

It evaporates

What type of material is an amalgam?

Ceramic

Composite

Polymer

Metallic (correct)

What is the initial state of a direct material?

Putty-like (A) Signup and view all the answers

What is the purpose of carving an amalgam?

To resemble the missing tooth structure (A) Signup and view all the answers

What type of material is a porcelain crown?

Dental ceramic (B) Signup and view all the answers

What is the characteristic of indirect restorative polymers?

They are typically processed or cured at elevated temperatures and under high pressures (A) Signup and view all the answers

What type of restoration is not planned to be replaced in a particular time period?

Permanent restoration (A) Signup and view all the answers

What type of materials are used in dental implants?

Bone regeneration materials (B) Signup and view all the answers

Where are dental implants anchored?

In alveolar bone (D) Signup and view all the answers

What type of restorations are constructed directly in the oral cavity?

Direct Restorative Materials (B) Signup and view all the answers

What is the typical shape of dental implants?

Both a and b (D) Signup and view all the answers

What is the category of materials that includes ceramic materials?

Indirect Restorative Materials (D) Signup and view all the answers

Where are restorations made of direct restorative materials placed?

In the cavity preparation (A) Signup and view all the answers

What is the discipline that deals with dental implants?

Restorative dentistry (D) Signup and view all the answers

What is the purpose of dental implants?

To support teeth replacement (C) Signup and view all the answers

What is the main difference between direct and indirect restorative materials?

Indirect materials are set outside the mouth (B) Signup and view all the answers

What is the reaction that sets composite restorations?

Specific chemical reaction (C) Signup and view all the answers

What is the purpose of aggressive preventive dentistry?

To prevent the need for restoration and replacement of teeth (B) Signup and view all the answers

What is the characteristic of glass ionomers and other cements?

They are mortar-like materials that set by an acid-base chemical reaction (A) Signup and view all the answers

What is the advantage of quality restorative dentistry in a well-maintained oral cavity?

It gives the patient years and years of service (D) Signup and view all the answers

What is the common fate of restorative dentistry, including fillings, crowns, bridges, and dentures?

They wear out and fail (A) Signup and view all the answers

What is the importance of the cycle of restoration and re-restoration of teeth in dentistry?

It is an important factor in the practice of dentistry (A) Signup and view all the answers

What is the main characteristic of direct restorative materials, such as composite restorations?

They are set by a specific chemical reaction in the mouth (C) Signup and view all the answers

Study Notes

Restorative Dentistry

In restorative dentistry, ceramics are "drilled" by dentists when removing decay and then fired at high temperatures to become solid objects.
Each material has its own requirements for cavity preparation design.

Direct Restorative Materials

Direct restorative materials are putty-like materials that set to become hard and strong.
Examples of direct restorative materials include:
- Amalgam, a metallic material formed by combining liquid mercury with powdered metals.
- Composites, esthetic materials that polymerize in the mouth.
- Glass ionomers and other cements, mortar-like materials that set by an acid-base chemical reaction in the mouth.

Indirect Restorative Materials

Indirect restorative materials are plastics typically processed or cured at elevated temperatures and under high pressures.
Examples of indirect restorative materials include:
- Porcelain crowns.
- Pink “gingival” portion of a denture.

Classification by Longevity of Use

Permanent restorations are those that are not planned to be replaced in a particular time period.
Although referred to as permanent, restorations do not last forever and will eventually need to be replaced.

Dental Implants

Dental implants are screws or posts anchored into alveolar bone and protrude through the gingiva into the oral cavity.
Implants are considered part of restorative dentistry but are segregated from other materials due to their specialized nature.