MDS PREP
Which of the following is likely to occur if the VDO is increased in a cornplete denture patient?
1. Loss of lip fullness
2. Decreased nose-chin distance
3. Clicking of teeth
4. Loss of tone of facial tissues
Prosthodontics
Answer: 3
Which of the following is likely to occur if the VDO is increased in a complete denture patient: clicking of teeth.
Finish lines of a complete coverage crown should be
1) Supragingivally
2) Subgingivally
3) Subgingivally if required
4) Gingival margin
Prosthodontics
Answer: 3
The finish line of a crown preparation can be placed supragingivally or subgingivally depending on the clinical situation. Subgingival finish lines may be necessary to achieve proper aesthetics, especially in cases where the margin needs to be hidden beneath the gingival tissue. However, it is important to avoid placing the finish line too far subgingivally, as this can complicate oral hygiene and lead to periodontal issues.
Decreased vertical dimension of occlusion (increased interocclusal space) results in all of the following except
1. Loss of muscle power
2. Sagging of the corners of the mouth
3. Senile appearance
4. Increase in the masticatory efficiency
Prosthodontics
Answer: 4
Decreased vertical dimension of occlusion results in all of the following except an increase in masticatory efficiency.
Which of the following implant materials density equals that of the alveolar bone
1) Chromium-cobalt
2) Titanium alloy
3) Stainless steel alloy
4) Bioglass
Prosthodontics
Answer: 2
Titanium alloys are commonly used in dental implants due to their favorable properties, including biocompatibility and mechanical strength. The density of titanium alloys is relatively close to that of human alveolar bone, which helps in achieving a good integration (osseointegration) between the implant and the bone. Other materials listed, such as chromium-cobalt and stainless steel alloys, have different densities and are not as compatible with bone in terms of density and biological response. Bioglass, while biocompatible, is not typically used as a structural implant material in the same way as titanium.
The lingual extension of a lower denture is limited by all of the following except
1. Modiolus
2. Mylohyoid muscle
3. Origin of genioglossus
4. Sublingual salivary glands
The lingual extension of a lower denture is limited by the action of modiolus.
As lower denture settles down due to ridge resorption, the effect is a
1. Prominent chin
2. Receded chin
3. Deepening of mentolabial sulcus
4. Deepening of nasolabial fold
Prosthodontics
Answer: 1
As lower denture settles down due to ridge resorption, the effect is a prominent chin.
The primary disadvantage of polyurethane resilient liners is that they
1. require special processing equipment
2. tear very easily
3. are not sufficiently soft
4. are difficult to clean
Prosthodontics
Answer: 1
Explanation: Polyurethane resilient liners do require special processing
equipment for their fabrication. This can be a disadvantage in comparison to
other types of liners that may be easier to produce and handle in a typical
dental setting.
A pantograph is a record of the patient’s
1. jaw movements
2. speech pattern
3. muscular con
4. maxillary movements
Prosthodontics
Answer: 1
A pantograph is a record of the patient’s jaw movements.