Thank you Pri,
Can you pls ans my these ques too:
1. assisting rt. Handed dentist, assistant should:
a. rest her feet on floor so that her operating stool is completely stable.
b. Pass instrument with her rt. Hand & retrieve with left hand
c. Position at 3 clock
Ans is c, wat about a?
2. intermittent pain in premolar and 2nd molar, no caries but large amalgam restorations r there, cause of pain:
a. max. sinus irritation
b. incomplete tooth fracture
c. setting expansion of amalgam
Ans is a, b I am in doubt for c too? Wat will be effect of amalgam setting expansion?
3. higher die strength & hardness of type 4 compare to type 2 gypsum is due to:
a. lesser amount of water required by densite for its chemical reaction
b. ------------------------------------ for solution & wetting during mix
Somewhre ans given is a & other b? can u pls tell me wats right & why?
4. pin technique least like to fracture of remaining hard tissue of non-vital tooth to be restored with pin retained amalgam is one using:
a. cemented pins
b. self- threaded
Ans is a, but isnt self threaded is considered best?
5. predisposing factors for period is. For class2 restoration:
a. open proximal contact of ½ mm
b. contact in middlethird occluso pgingivally
Ans both a& b, but I read that we maintain distance from adjacent tooth for passage of explorer tip, 0.5mm , then wy a is predisposing factor if its done intentionally? And couldnt get about option b too?
6. clinical crown of non- carious posterior tooth is much longer than anatomic crown due to perio problem & subsequent t/t, gingival margin of full crown prep for splinting can properly be placed:
a. on enamel
b. on CEJ
c. at gingival crest
d. under free gingival margin
Ans a, b can u pls explain why?
7. wats the difference of class5 cavity for composite & GIC?
8. two adjacent cavities involving contact may be prepared & restored with composite at one appointment coz:
a. material achieve high early strength
b. color match is accomplished
c. conserve time
Ans is a & c, but how can it increase strength?
9.principle problem of overcontouring restoration near gingival is gingival irritation due to:
a. lack of normal mechanical stimulation
b. impaction of food particles in gingival sulcus
c. inability to clean area througly with brush
d. excessive mechanical stimulation
Ans is a, c But if b is also not true and as he say lack of normal stimulation, do the restoration stimulate gingival?