need answers to nbde2 questions URGENTLY

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pls my exams are tommorrow
i have tried all i can but cant find the answers to these questions
pls help urgently

1--components of dental implants
area of placement
bone width required
degree of submersion to provide emergence profile

2--treatment of nasopalatine duct cyst

3--why are composites not put in primary posterior teeth

4--which asthma drug causes oral fungal infection

5--why do you give hydralazine with chloral hydrate

6---what causes porcelain to break off from PFM

7- best xtic of a high noble alloy

thanx
really appreciate the help

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