MDS PREP
The advantage of natural glaze compared to applied artificial glaze
1) More smooth finish is achieved
2) More permanent glaze is achieved
3) More shiny surface is achieved
4) All of the above
Conservative Dentistry
Answer: 2
Natural glaze is often more durable and permanent compared to applied artificial
glaze, providing a better finish.
Primary determinant of the outline form in class V preparation
1. Height of the gingival crest
2. Extension of the caries
3. Type of the restorative material
4. Teeth anatomy
Conservative Dentistry
Answer: 2
Explanation: The outline form of a Class V cavity preparation
is primarily determined by the extent of carious tissue. The goal is to remove
all carious dentin while preserving as much healthy tooth structure as possible.
The outline form must encompass the entire area affected by caries to ensure
that the restoration is effective and durable. Other factors, such as the height
of the gingival crest, type of restorative material, and tooth anatomy, may
influence the preparation but are secondary to the extent of caries.
Lingual approach to the distal surface in canine for class III amalgam restoration is related to
1. Retention
2. Outline form
3. Resistance
4. Aesthetics
Explanation: The lingual approach to the distal surface of a canine for Class III amalgam restoration is primarily related to aesthetics. This approach minimizes visibility of the restoration from the facial aspect, which is important for maintaining the natural appearance of the tooth. Aesthetic considerations are particularly significant in anterior teeth, where the visibility of restorations can impact the overall smile and facial aesthetics. While retention, outline form, and resistance are important factors in cavity preparation, the lingual approach is specifically chosen to enhance the aesthetic outcome.
Which of the following is the functionally generated occlusal registration in an indirect gold casting technique
1) Centric relation
2) Anatomic registration
3) Restration of the envelope of occlusion
4) Static registration of dynamic occlusion
Conservative Dentistry
Answer: 4
In indirect gold casting techniques, occlusal registration is crucial for ensuring that the final restoration fits properly in the patient's occlusion. "Static registration of dynamic occlusion" refers to capturing the occlusal relationship when the patient is in a static position, which is essential for creating a functional restoration.
The main disadvantages of composites of not being recommended for class II posterior restorations
1. Colour matching is not good
2. Lacks sufficient strength
3. Occlusal wear
4. Frequent fractures at the isthmus
Conservative Dentistry
Answer: 3
One of the main disadvantages of composite materials in Class II posterior restorations is their susceptibility to occlusal wear, which can compromise the longevity of the restoration.
Outline form of a class V amalgam cavity preparation is related to (or) External shape of the class V amalgam restoration is related to
1. Contour of marginal gingiva
2. Axial line angles
3. Direction of the enamel rods
4. None of the above
Conservative Dentistry
Answer: 1
Explanation: The external shape of a Class V amalgam
restoration is closely related to the contour of the marginal gingiva. This is
important for aesthetic and functional reasons, as the restoration must blend
seamlessly with the surrounding gingival tissue. The outline form should respect
the natural contours to minimize plaque accumulation and promote periodontal
health. While axial line angles and the direction of enamel rods are relevant to
the preparation, they do not primarily dictate the external shape of the
restoration.
In modified class III cavity restoration, retention is obtained mainly by
1. Acid etching
2. Retentive groove/slot
3. Retentive point
4. Retentive pin
Conservative Dentistry
Answer: 1
Explanation: In modified Class III cavity restorations,
particularly those involving composite materials, retention is often achieved
through acid etching. This process creates micro-retentive features on the
enamel and dentin surfaces, allowing the bonding agent to penetrate and create a
strong bond with the tooth structure. While retentive grooves, points, and pins
can also be used, acid etching is a fundamental technique that enhances
retention in adhesive dentistry.
In class V preparation the wall which is not present at all
1. Pulpal
2. Distal
3. Mesial
4. Axial
Conservative Dentistry
Answer: 1
In class V preparation, the pulpal wall is not present at all, as the cavity is
confined to the cervical third of the tooth. It does not extend into the pulp
chamber.