Nbd 2 Questions

[dentistgal]

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1) Which of the folllowing statements describe composite resins
I They can be placed and finished in the same appointment.
II. They are more color stable than unfilled resins.
III. They are similar to Amalgam with respect to coefficient of Thermal expansion.
IV. The finished surface tends to be somewhat rough.
Answer- A - I , II B. I ,IV C. I, III IV , D. II , III , E. II , III ,IV F. All the above

2) Pulpal irritation would not be expected from a restorative material , provided the minimum thickness of the material was
A 0.2 mm B. 0.5 mm C. 1 mm D. 2 mm E. 3 mm

 

[perav]

http://www.lsusd.lsuhsc.edu/faculty/Chapter%2012 Cysts of the Jaws.slides.pdf

thanks . but it says it is very rare . any way then i do not know the right answer

 

[perav]

Q) max canine very important in arch; which material is worst for long term class III? Resin, rmgi, gold, amalgam

resin modified glass inomer , due to lower wear resistance

Q)ok to leave unsupported enamel: occlusal class V, facial class III?

i would say class 3 facial . since the bevel helps in more surface area for etching hence additional retention for the composite .

 

[perav]

Q)what ethically do you have to report, according to ADA publication?



A dentist’s ethical obligation to identify and report the signs of abuse and neglect is, at a minimum, to be consistent with a dentist’s legal obligation in the jurisdiction where the dentist practices. Dentists, therefore, are ethically obliged to identify and report suspected cases of abuse and neglect to the same extent as they are legally obliged to do so in the jurisdiction where they practice. Dentists have a concurrent ethical obligation to respect an adult patient’s right to self-determination and confidentiality and to promote the welfare of all patients.

 

[botulism]

Q)
Q)Rct therapy with pain 2-3 days after, normal PA; 2 yrs later PA radiolucency but asymptomatic. Treatment?

 

[botulism]

Q)
Q)Rct therapy with pain 2-3 days after, normal PA; 2 yrs later PA radiolucency but asymptomatic. Treatment?

RETREATMENT
Principal Causes Why Root Canal Treatment Had Failed:
Missed Canals
Coronal Leakage
Post Placement Errors
Blocks, Ledges, Perforations, and Transportations
Restoration Failures
Fractures
Inadequately Filled Canals
Separated Instruments


Incomplete root canal treatment is a common cause of endodontic failure. Decay can lead to bacterial contamination of the root canal filling and a new infection.

Although there have been many advances in current root canal therapy, success still depends on a sound restoration. Coronal microleakage caused by caries or a failing restoration will allow bacteria-laden saliva to enter the canal, undoing even the most thorough root canal treatment.

Endodontic failures must be carefully evaluated so that a decision can be made among NONSURGICAL retreatment, SURGICAL retreatment, or EXTRACTION.
Nonsurgical retreatment is an endodontic procedure used to remove materials from the root canal space and if present address deficiencies or repair defects that are pathologic or iatrogenic in origin. This disassembly and corrective procedures then allow the clinician to clean, shape and pack the root canal system (Cohen).

Careful treatment planning sets the stage for a successful outcome. A win-win treatment plan is a strategy in which everyone—the patient, the restorative dentist, and any specialists involved—collaborates. A comprehensive assessment of a patient's dental health enables practitioners to evaluate failing endodontics and determine whether to watch, retreat, perform endodontic surgery or extract. Biological, clinical, esthetic, functional and financial factors must also be considered.

Prior to undertaking retreatment, it is important to assess the tooth's overall health and restorability, as well as its significance in the comprehensive treatment plan. Even if the patient is asymptomatic, consider retreating teeth with questionable root canal fillings if a new restoration is planned. Prosthetic intervention can precipitate endodontic problems although the case may have been successful for many years. Retreatment is always more challenging than the initial procedure. If no new restoration is planned, however, and clinical or radiographic evidence of pathosis is absent, it may be prudent to defer retreatment.

 

[botulism]

Q)Junctional epithelium…type of attachment?
A: Epithelial Attachment
The dentogingival junction consists of the epithelial attachment/ junctional epithelium.

 

[mesh]

A patient was administered a flow rate of 4 liters of oxygen and 2 liters of nitrous oxide. What percentage of nitrous oxide did the patient inhale?

1. 0.25
2. 0.33
3. 0.5
4. 0.66

2 is correct but how do we calculate???

 

[thaizemelo]

A patient was administered a flow rate of 4 liters of oxygen and 2 liters of nitrous oxide. What percentage of nitrous oxide did the patient inhale?

1. 0.25
2. 0.33
3. 0.5
4. 0.66

2 is correct but how do we calculate???

6 liters is the total. 2 liters is 33%. sO, The patient inhaled 0.33 of nitrous.

 

[mesh]

thanks 🙂

 

[mesh]

20. hit on one side of mandible, also look for fracture where?

21. broken right body of mandible, where else look for fracture?


22.how does parent of special needs child feel most of the time? Hopeless, depressed

13. 1 liter of water with 1 ppm fluoride; how much mg?

16. when to do bone graft for alveolar cleft? Before primary canine erupts, before permanent canine erupts, after permanent canine erupts, when do orthognathic sugery??


17. what is unique to end on appliance? Intrude, extrude, torque, tip

18. occlusal trauma causes? Drifting, widened pdl, mobility, sensitive to hot/cold

19. how to differentiate b/t PA endo lesion vs perio PA lesion?

23. what determines most distal lingual extension of denture flange?

 

[mesh]

28. what type of fracture in tooth will allow complete transillumination of crown? Vert root fract, cracked tooth, craze lines


30. opaquer? Thickness, how affects color, when to place



34. in kids age 6-10, what prevents caries most? Sealants, routine dental visits, fluoride toothpaste

35. which pulp horn in child is most susceptible to exposure?

 

[mesh]

38. reason not to have to replace class II amalgam? Open contact packing food, fracture at axiopulpal line angle area, recurrent decay radiographically, occlusal margins over carved

39. how to keep distal box of amalgam from being displaced proximally? Proximal retention grooves, converge facial and lingual walls, widen isthmus


41. after etch and primer, hybrid layer formed by what?


44. veracity as it refers to ethics?

 

[dentistgal]

Q) max canine very important in arch; which material is worst for long term class III? Resin, rmgi, gold, amalgam

resin as it wears away so arch length lost

Q)ok to leave unsupported enamel: occlusal class V, facial class III?

class III

 

[perav]

38. reason not to have to replace class II amalgam? Open contact packing food, fracture at axiopulpal line angle area, recurrent decay radiographically, occlusal margins over carved

occlusal margins overcarved sounds the best option .

39. how to keep distal box of amalgam from being displaced proximally? Proximal retention grooves, converge facial and lingual walls, widen isthmus

actually it is occlusal dove tail .


41. after etch and primer, hybrid layer formed by what?

hybrid layer is the interpenetration zone , formed of resin tags of primer in intertubular dentin and surround the collagen in dentin .




44. veracity as it refers to ethics?

Principle: Veracity ("truthfulness")
The dentist has a duty to communicate truthfully.

This principle expresses the concept that professionals have a duty to be honest and trustworthy in their dealings with people. Under this principle, the dentist's primary obligations include respecting the position of trust inherent in the dentist-patient relationship, communicating truthfully and without deception, and maintaining intellectual integrity.

23. what determines most distal lingual extension of denture flange?

superior pharengeal constrictor muscle

18. occlusal trauma causes? Drifting, widened pdl, mobility, sensitive to hot/cold

mobility ( confirmed from previous papers released ones )

28. what type of fracture in tooth will allow complete transillumination of crown? Vert root fract, cracked tooth(answer), craze lines

Transillumination is often a useful diagnostic procedure in detecting incomplete tooth fractures. When a small bright light is directed axially, the crack alters the path of the light, resulting in the cracked portion of the tooth appearing darker than the surrounding tooth structure. When combined with other diagnostic tests, transillumination is helpful in confirming the diagnosis of incomplete tooth fracture.

 

[dentistgal]

20. hit on one side of mandible, also look for fracture where?

21. broken right body of mandible, where else look for fracture?


22.how does parent of special needs child feel most of the time? Hopeless, depressed

13. 1 liter of water with 1 ppm fluoride; how much mg?

16. when to do bone graft for alveolar cleft? Before primary canine erupts, before permanent canine erupts, after permanent canine erupts, when do orthognathic sugery??


17. what is unique to end on appliance? Intrude, extrude, torque, tip

18. occlusal trauma causes? Drifting, widened pdl, mobility, sensitive to hot/cold

19. how to differentiate b/t PA endo lesion vs perio PA lesion?

23. what determines most distal lingual extension of denture flange?

21) left sub condylar?
22) ?
13) 1 mg
16) after permanent canine eruption
17) ?
18) widened pdl ?
19) vitality test endo lesion non vital - perio lesion teeth vital
23) sup pharangeal constrictor ?

 

[mesh]

the major cause of EPULIS FISSURATUM IS an over extended denture right i mean according to the decks.....????

 

[perav]

9) top of the implant is what mm from adjacent CEJ
a. 2-3mm
b. 4-5mm
c. 7-8mm
d. 5-6mm


2-3 mm .

general implant spacing requirements

2 mm from edge of implant to adjacent tooth
3mm from edge of implant to adjacent implant
1-1.5 mm from the cortical plate
2mm from any critical structure

 

[perav]

Q)for taking the impression 4 an implant what do u do first
chk the tray 1st to see its fit
put the coping with acrylic resin
put the coping first
???

put coping first

 

[mesh]

wouldnt we chk the tray first for the fitting?

 

[perav]

wouldnt we chk the tray first for the fitting?

no first we put the coping .because we have to take the impression with the coping in place .

 

[mesh]

thanks buddie

 

[perav]

10)what metal help chemical bond to porcelain

tin , indium

 

[mesh]

q) size 15 files placed in three canals of mandibular molar and xray taken from mesial of mesiofacial root; list in order position of roots on film?


q) where will you see recession after packing cord with thin scalloped tissue? Facial, proximal, lingual or facial w/ interproximal


q)anterior crown placed 10 years ago, 45 y/o women, doesn’t match natural teeth now. It appears clinically acceptable, what to do? Vital bleach, new crown, microetch and comp bond


q)what is unique to end on appliance?

 

[mesh]

q)hich pulp horn in child is most susceptible to exposure?

 

[mesh]

q)many porosities in acrylic denture; why? Over packing acrylic, inaccurate powder/liquid ratio, leaving too much flash, heating temp too high

 

[perav]

q)many porosities in acrylic denture; why? Over packing acrylic, inaccurate powder/liquid ratio, leaving too much flash, heating temp too high

heating temp too high so the monomer evaporate .

 

[perav]

q)anterior crown placed 10 years ago, 45 y/o women, doesn't match natural teeth now. It appears clinically acceptable, what to do? Vital bleach, new crown, microetch and comp bond

new crown .

 

[mesh]

Q)after etch and primer, hybrid layer formed by what?

The formation of a hybrid layer resulting from the polymerized methacrylate and dentin.The hybrid layer is defined as "the structure formed in dental hard tissues (enamel, dentin, cementum) by demineralization of the surface and subsurface, followed by infiltration of monomers and subsequent polymerization.The bonding mechanism to dentin was effective and predictable when the smear layer was completely dissolved, intertubular and peritubular dentin were dissolved, collagen fibers exposed and, after infiltration of resin monomers, a hybrid layer formed

 

[mesh]

q) where will you see recession after packing cord with thin scalloped tissue? Facial, proximal, lingual or facial w/ interproximal

answer FACIAL


disadvantage of braided retraction cord is encountered when packing the cord around anterior or front teeth where the gingival tissue is thinner and more easily damaged on the labial (lip) side of the tooth. For instance, a braided cord that will adequately retract the sulcus on the lingual (tongue) side, because of its lack of elasticity in the transverse dimension, may overstretch the sulcus on the lip side of the tooth, thereby causing unacceptable damage to the sensitive gingival tissues. Accordingly, use of braided cord in connection with the front teeth becomes very difficult and cumbersome as several cords must be packed into some portions of the sulcus, while only one or two cords are packed into other portions of the sulcus.

 

[mesh]

1 liter of water with 1 ppm fluoride; how much mg?

1 mg

how do u calculate??

 

[bridge]

Question:
Which is the first bacteria to colonize in the dental plaque.

 

[botulism]

q) size 15 files placed in three canals of mandibular molar and xray taken from mesial of mesiofacial root; list in order position of roots on film?


A: mesiolingual canal, mesiobuccal canal, distal canal
The buccal root object:
When the cone is aimed to the distal (angled from the mesial direction) the buccal root or canal moves to the distal and appears distal to the lingual or palatal root or canal (DD).

 

[botulism]

Question:
Which is the first bacteria to colonize in the dental plaque.

The earliest of the primary bacterial colonizers are mainly Gram-positive facultative cocci. They are followed by a variety of Gram-positive and Gram-negative species-- the secondary colonizers.

 

[botulism]

q)hich pulp horn in child is most susceptible to exposure?

A: Mesial horns of primary molars.

 

[perav]

Q)
Q)Rct therapy with pain 2-3 days after, normal PA; 2 yrs later PA radiolucency but asymptomatic. Treatment?


due to the presence of radiolucency , there is a possibility of a rct failure that has caused a radicular cyst .so we would have to do periapical curretage .of the cyst .

 

[mesh]

is there a good page or something where i can read abt implants from?🙂

 

[perav]

blank

 

[botulism]

is there a good page or something where i can read abt implants from?🙂

http://ocw.tufts.edu/Course/10/lecturenotes

http://www.dentalsummaries.com/dis/index.htm

 

[mesh]

Q)what is not an indication for restoring class V abrafaction?
Sensitivity,
esthetics,
prevention of decay,
prevention of further structure loss,
restoring physiological contour

 

[mesh]

Q) previously rct’d tooth has microleakage which has minimal effect; this is because most rcts have a hermetic seal?
All true,
all false
true/false
false/true

 

[mesh]

Q)maxillary tuberosity removal, use surgical stent why?
Prevent hematoma,
pt comfort

 

[mesh]

Q) hand rolled acrylic tray can’t be used for 24 hrs why?
Distortion,
needs to dry,
adhesive won’t stick

 

[mesh]

Q)what has biggest effect on success of flap?
Initial incision,
extensiveness of reflection,
oral hygiene post op,
final position of flap

 

[mesh]

Q)alveoloplasty with excessive flap reflection, with primary closure what is the sequelae?
Shortened vestibule,
removed too much bone,
post op infection

 

[mesh]

Q)gingival index is what?
Ordinal,
nominal,
ratio,
integral

 

[mesh]

Q)what does not remove sulcular plaque?
Toothpick
nylon bush,
water pick,
powered brush,
floss

 

[mesh]

Q)man with dentures for past 19 yrs has 6x3mm white lesion on left distofacial ridge area, pt unaware, what do you do?
Incision,
excision,
cytologic,
adjust and check in one week

 

[mesh]

Q)larger filler particles mean what?
Stronger
weaker
polishability

 

[mesh]

Q)19 y/o female previously treated for endo fracture at level of alveolus; what to do to maintain esthetics?
FPD over remaining tooth structure
remove remaining tooth structure,
ortho to extrude remaing tooth structure

 

[perav]

Q)what is not an indication for restoring class V abrafaction?
Sensitivity,
esthetics,
prevention of decay,
prevention of further structure loss,
restoring physiological contour

sensitivity , as you could use desensitizing paste or some bonding agent