If anyone can answer the following with explaination I,ll really appreciate it.
1. A lateral Cephalometeric radiograph for a patient with a 3mm anterior functional shift should be taken with the pt. in
a. max. intercuspation
b. initial contact
c. normal rest position
d. max. openining
e. protusive
i think that the ans to this shd be (b) initial contact.... coz that would give us an exact view of the various denal or skeletal anomalies that the patient might be having....this one is just a guess though.
2. Which one of the following describe the position of needle tip during administration of local anaesthetic for inf. alv. block?
a. ant. to ptergomandibular raphe
b. medial to med. pterygoid muscle
c. superior to lat. pterygoid muscle
d.lateral to sphenomandibular ligament
the ans is (d) lateral to sphenomandibular ligament
approximating structures when needle is in final position are
posteriorly : parotid gland and its contents
medially : lingual nerve , medial pterygoid muscle , sphenomandibular ligament
laterally : medial surface of mandible
superiorly : lateral pterygoid muscle , infratemporal fossa and its contents
inferiorly :inferior alveolar nerve and vessels,medial pterygoid muscle , myolohyoid nerve and vessel.
3.
Which of the following would be a Contrainfication for the use of a resin bonded fixed partial denture ( acid etched bridge or Maryland Bridge)?
a. class II malocclusion
b. an opposing free end saddle removable partail denture
c. previous orthodontic treatment
d. heavily restored abutment
dont know about this one.
4. the most common complication of veinpuncture is
a. syncope
b. hematoma
c. thrombophelbitis
d. embolous
i think the ans should be (b) coz the question asks the most common complication seen to a venipuncture....however the most common reaction to venipuncture or any kind of needle prick would be syncope but we cant count syncope as a complication.......and options (c) and (d) are quite adverse reactions and i dont think are common ones.
5. In normal pulp which of the following is leastly to appear histologically
a. cell-free zone of weil
b. palisade odontoblastic layer
c. lymphocyte and plasma cell
e. undifferentiated mesenchymal cells
its (c) lymphocytes and plasma cells.
options (a) , (b) , (d) are all a part of the normal pulp histology....but cells like lymphocytes and plasma cells appear only in cases of pulpal inflammation or infection...though some might argue that normal pulp does contain a few lymphocytes as well....but from the given choices i think i would pick (c) .