CPC Line

# Transverse line extending from or between the middle of upper canine and incisive fossa is called:
a) Horizontal line
b) Orientation line
c) Transverse line
d) CPC line

The correct answer is D. CPC line.

Canine-papillary-canine line (CPC line) is used as a guide to orient the upper canine teeth in complete dentures. The incisive papilla is a stable landmark for arranging labial surfaces of central incisors 10mm anterior to the incisive papilla. The tips of canines should be set on a horizontal line which pass through the posterior border of incisive papilla.

Palatopharyngeal Incompetence

# Palatopharyngeal incompetence is treated by?
a) Palatal lift prosthesis
b) Obturator prosthesis
c) Pharyngeal speech prosthesis
d) Pharyngeal bulb prosthesis

The correct answer is A. Palatal lift prosthesis.

Palatal lift prosthesis is useful for patients with velopharyngeal incompetence who exhibit compromised motor control of the soft palate & related musculature. The objective of palatal lift prosthesis is to displace the soft palate to the level of normal palatal elevation, enabling closure by pharyngeal action.

Over Dentures in Prosthodontics

# The use of selected initial roots in over denture therapy is called :
a) Overlaying denture therapy
b) Biologic denture therapy
c) Submucosal vital root retention
d) Submerged denture therapy

The correct answer is C. Submucosal vital root retention.

In over dentures, anterior abutments are preferred over posterior abutments since the anterior ridge is more vulnerable to resorption than the posterior ridge.

Serum alkaline phosphate

# Serum alkaline phosphate is increased in all EXCEPT:
A. Paget's disease
B. Fibrous dysplasia
C. Osteomyelitis
D. Hyperparathyroidism

- In Paget's disease and hyperparathyroidism the level of Serum alkaline phosphate is elevated.

- In fibrous dysplasia, the levels are elevated initially.

- In Osteomyelitis, the level stays normal, so is the answer.

Oral manifestations of osteogenesis imperfecta

- large head size

- frontal bossing

- maxillary hypoplasia

- bulbous crowns of teeth with Dentinogenesis imperfecta and blue or brown translucence (opalescent teeth)

- Class III mal occlusion with anterior and posterior cross bite.

- Severe attrition of deciduous teeth

- Multiple impacted permanent teeth

- Excessive bruising tendency

- increased incidences of development of osteitis and osteomyelitis following extraction of teeth.