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I read in Pickard and shillingburg that for endodontically treated teeth the ferrule effect is the most important when it comes to retention and core build up.
and yes i observe a dentist here time and again and she doesnt use any different resin like a high contrast one for cores..it is the same thing yet they will make sure there is some tooth structure like a ferrule to support the build up,the whole thing is even if i read it from the book they say that as long as there is adequate ferrule it doesn't matter which ever material u use amalgam or resin becoz in either case u need that ferrule for the coreto be a success.
I think the right answer is a. high contrast between composite resin and tooth. I am assuming adequate tooth structure means that there is the adequate ferrule.
I am not saying ferrule is not important. I am assuming that there is an adquate ferrule because the question says there is adequate structure of tooth remaining. However, even if there is a ferrule if it does not have a high contrast with the dentin of the tooth and you can't distinguish which is which how would you know for sure you are not placing the margin on resin ??
contraction of lateral pterygoid muscle pulls the disc of the TMJ
a. forward and medially👍
b.backward and medially
c.forward and laterally
d.backward and laterally
e.None of the above
pls answer this question with a reference.
What would you do in a situation you described?
If there is remaining composite of tooth color and you cannot distinguish them? Do you remove the composite to see how much tooth structure is left? (How do you remove it if not distinguishable?)
I think it is not difficult to tell the difference between the dentin and composite, even if the shade is very similar.
And if you are forced to place the margin on resin doesn't it mean that the ferrule is not adequate?
Assuming there is adequate tooth structure remaining composite resin can be used as a core material for endodontically treated teeth to be crowned provided
a. the resin has a high contrast colour with the tooth sturcture
b. there is an adequate ferrule--- i would choose this any suggestions.
c. the resin autopolymerizing
d. subsequent crown margins are not located on cementum
contraction of lateral pterygoid muscle pulls the disc of the TMJ
a. forward and medially
b.backward and medially
c.forward and laterally
d.backward and laterally
e.None of the above
pls answer this question with a reference.
i know what u are talking abt the muscle does have a forward medial pull but when u read the tmj anatomy and disc movements it says that u cannot make the disc move medially it can only move forward and downwards.the shape of the condyle and the articular cavity is such that the disc can only move forward.
I am still open for discussion becoz this is confusing.
contraction of lateral pterygoid muscle pulls the disc of the TMJ
a. forward and medially --right answer
b.backward and medially
c.forward and laterally
d.backward and laterally
e.None of the above
pls answer this question with a reference.
What would you do in a situation you described?
If there is remaining composite of tooth color and you cannot distinguish them? Do you remove the composite to see how much tooth structure is left? (How do you remove it if not distinguishable?)
I think it is not difficult to tell the difference between the dentin and composite, even if the shade is very similar.
And if you are forced to place the margin on resin doesn't it mean that the ferrule is not adequate?
I was assuming there is adequate ferrule when they say there is adequate structure of tooth left. In that case the only thing I would need is to have a resin distinguishable from dentin so that accidentally I do not cut and prepare the margin into composite.
contemporary fixed prosthodontics by Rosenstiel, Fujimoto, Land page 180...
However, when I read it again and one of the alternatives is the adequate ferrule it made me think that the person who made this question maybe by adequate structure did not mean adequate ferrule... so the answer will be adequate ferrule..
That's what I meant, I think adequate ferrule and adequate tooth structure are not the equal.
As for the composite what I meant in my previous post is, you can't have adequate ferrule and at the same time place the margin in composite, because if your margin ends up in resin it means there was no ferrule. Am I wrong?
like i said the books i have read never mention the disc ever moving anywhere but forward and downwards.Leda can u tell me which book says the disc moves forward and medial ?
the occlusal parameter that is most useful to differentiate between an overbite of dental or skeletal origin is the
a. mandibular curve of spee
b. mandibular curve of wilson
c. molar saggital relationship
d. mandibular anterior lack of space
e. maxillary curve of wilson.
the most important factor to consider before extracting a mandibular incisoris
a. severity of the crowding
b. mandibular curve of spee
c. a bolton discrepancy
d. the vertical incisor relationship
e. th ehorizontal incisor relaitonship.
in a xerostomic patient which salivary glands are likely responsible for the lack of lubrication
a accessory
s. labial
c. parotid
d. sublingual and sub mandibular
after the cementation of a crown,which of the following is most likely to result in ch. gingivitis
a. sub gingival finish line
b. a supragingival finish line
c. an undercontoured crown
d. an over contoured crown
right answer is an overcontoured crown
which of the following conditions should not commonly be treated during the mixed dentistion stage
a. Anterior crossbite
b. posterior crossbite
c. maxillary incisor rotation
d. classs 2 molar realtionship
the most appropriate management for a tooth with a history of previous trauma that now exhibits apical resorption is
a. observation over 6 mths for further resorption
b. complete instrumentation and medication with intracana; CAoh
c. immediate instrumentation and obturation followed by apical curettage
d.extraction ,apical resection,retrofilling and replantation
e. extraction and replacement with a fixed or removable prosthesis
which of the following conditions should not commonly be treated during the mixed dentistion stage
a. Anterior crossbite
b. posterior crossbite
c. maxillary incisor rotation
d. classs 2 molar realtionship
I think b, medication with Ca(OH)2
don't u think sub gingival finish line can be more irritating ??
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