36 Questions
What is the primary objective of cavity preparation?
To remove all defects and protect the pulp
Which classification system is mentioned in the text for carious lesions?
GV Black’s Classification
What is the purpose of the biological principles of cavity preparation?
To protect the pulp and prevent caries recurrence
What is the role of mechanical alteration in cavity preparation?
To receive a restorative material and restore proper form, function, and esthetics
In cavity preparation, what should be done with defective and friable tooth structure?
It should all be removed
What are the objectives of cavity preparation according to the text?
To locate the margins of restorations conservatively
Which principle of cavity preparation is concerned with the health and integrity of the remaining tooth tissues?
Biological Principles
What is one of the forms of biological principles mentioned in the text?
Pulp protection
According to the text, what do the biological principles in cavity preparation aim to minimize?
Irritation to vital tooth structures
What does GV Black’s Classification primarily consider?
Mechanical factors
What does cavity preparation involve according to the text?
Removal of all defective and friable tooth structure
In cavity preparation, what is the purpose of forming the cavity so that under masticatory forces, the tooth and restoration will not fracture?
To prevent fracture under chewing forces
Which factor dictates the outline form of the cavity preparation?
Position of pits & fissures
Why should unsupported enamel be removed during cavity preparation?
To minimize the chance of secondary decay
What is the process of reshaping the enamel surface with rotary instruments to make it cleanable and finishable called?
Enameloplasty
Which of the following should be less than 1.5 mm in the bucco-lingual direction when extending a cavity to eliminate defective and susceptible tissues?
Diameter of bur
Why should healthy tooth structure NOT be removed during cavity preparation?
Because it cannot be put back once removed
What should be included in a Class II preparation if the marginal ridge is unsupported or very thin (less than 1.6mm)?
Marginal ridge
What determines the position and configuration of the cavosurface margin in cavity preparations?
The material utilized to restore teeth
What is the recommended width for the optimal isthmus?
¼ intercuspal distance
What is the primary reason for placing a bevel and etching the enamel at the cavosurface angle in composite resin preparations?
To maximize edge strength for both the restorative material and the enamel
What should be parallel to the contour of the marginal ridge in a Class II preparation?
Mesial and distal walls
What does enameloplasty involve?
Reshaping the enamel surface with rotary instruments
What causes unsupported enamel that may fracture if subjected to occlusal load?
Converged walls
What must be incorporated into each cavity preparation based on the individual properties of each restorative material utilized?
Design factors that demand certain position and configuration of cavosurface margin
What is extended just sufficient to eliminate the defective and susceptible tissues in a cavity?
Bucco-lingual extension
What is the principle known as 'extension for prevention' applied to in cavity preparations?
Including areas with caries susceptibility in the outline form
What is recommended if the marginal ridge is unsupported or very thin in a Class II preparation?
Diameter of bur
What should be conserved to insulate and strengthen the restored tooth in posterior teeth?
The dentin surrounding the pulpal horns
What is recommended for preserving the strength and function of the cusps while eliminating susceptible grooves or defective tooth structure in a cavity?
Isthmus just wide enough to accept instrumentation
What is an exception made for during cavity preparation with regards to unsupported enamel?
Retaining unsupported enamel for conservative placement with composite resins
What should be parallel to the respective tooth surface in a cavity to eliminate defective and susceptible tissues?
Bucco-lingual extension
What should be designed to ensure that all margins are in areas easily cleansed by the patient?
Outline form
What causes unsupported enamel, which may fracture if subjected to occlusal load due to little amount of dentin supported enamel?
Converged walls
What is the recommended width for the optimal isthmus?
¼ intercuspal distance
What should be included in a Class II preparation if the marginal ridge is unsupported or very thin (less than 1.6mm)?
Marginal ridge
Learn about the principles and objectives of cavity preparation in dentistry through this quiz. Understand the mechanical alteration of a tooth to receive a restorative material for proper form, function, and esthetics.
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