braces and spacers (whats the difference between spacers and expanders)?

braces and spacers (whats the difference between spacers and expanders)?

braces and spacers (whats the difference between spacers and expanders)?

Posted: 12 Dec 2012 01:27 AM PST

So i'm getting braces in 3 days!! (OMMGG!!) and i have teeth like this: http://dkm80tng5uqm9.cloudfront.net/full/35f29af097e8517b71055520d55f36ef/660611-827913.jpg (these are not exactly like mine^) 1. my dentist didn't say anything about spacers or expanders but he said he might has to pull teeth...I said no! what is the difference between expanders and spacers? shouldn't this work the same as pulling teeth? i have a very very small jaw! and im 14 years old 2. Can i ask my dentist for spacers or expanders? and can i get them at the same time as braces?? 3. I saw these like caps (actually i have no idea what they are called, could u pls tell me that too? is it band?) and they are on the last teeth for the braces like this --> http://www.google.com.my/imgres?q=braces+from+side&hl=en&tbo=d&biw=1280&bih=632&tbm=isch&tbnid=VxPhRFNM6bsNoM:&imgrefurl=http://www.barberorthodontics.com.au/braces-information-orthodontist-brisbane.php&docid=OKUBwGcXET1OTM&imgurl=http://www.barberorthodontics.com.au/images/know-braces-img.jpg&w=514&h=356&ei=VU3IUMbpNciHrAfdtICoDw&zoom=1&iact=hc&vpx=369&vpy=126&dur=10121&hovh=187&hovw=270&tx=87&ty=65&sig=100534801172425033851&page=1&tbnh=131&tbnw=195&start=0&ndsp=20&ved=1t:429,r:2,s:0,i:86 What is that big metal thing at the back and does it hurt and what is it for? I'm really worried!! thanks

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