Jimmy C. Wu, DDS

Any toothbrush is fine to use on your veneers.  However, you must be cautious when brushing at the gumline.  If the bristles of your toothbrush are too hard or abrasive or if you tend to use a lot of force when brushing, you run the risk of causing gum recession which could expose the margins of your veneers and the discolored root portion of your tooth.  Always try to use the softest toothbrush available to minimize the chances of causing tooth brush abrasion.  A softer toothbrush will also allow you to clean a larger surface area increasing efficiency and keeping yours gums nice and tight around your veneers.

Rotations are definitely one of the toughest movements to accomplish in the mouth.  Periodontal fibers that attach to the root surface tend to pull and prevent braces or Invisalign from accomplishing the goal of alignment when it concerns rotated teeth.  That's not to say that this cannot be accomplished.   It does take a bit more work, such as the use of attachments for added torque and with patience the teeth will rotate and align.  Invisalign in particular has done numerous studies using various shapes and positions for these tooth colored attachments to achieve optimum results.  Seven years ago Invisalign would have a very tough time with this type of movement.  Now with all of the research done, Invisalign can accomplish this and other difficult movements as well.  So yes you should be able to achieve your predicted outcome.

Their could be two things happening.  If the tray does not fit so well around the edges, this could be causing some irritation to all of the soft tissue in your mouth( i.e. lips, gums, tongue ).  If the first two weeks were fine, I can only guess that you have moved to your second set of trays.  Perhaps your teeth have not shifted enough and that is why the tray is not fitting correctly.  I suggest you see your dentist or orthodontist that is treating your case to check the fit of the trays.  If the edges of the trays are too sharp then cankor sores could be developing which can be extremely painful.  The edges should then be smoothed out by your doctor.  The other possibility is that you're beginning to grind on the trays at night which can cause the edges of the trays to flair out and irritate the mouth.

I highly doubt that it is due to an allergy, because of the fact that you were asymptomatic the first two weeks of treatment.  If your dentist does not see anything wrong with the trays themselves, then their could be some form of viral disease occuring simultaneously.  Then I would proceed to check with your physician.

I've been treating Invisalign patients for the the last 8 years.  The reson why your overbite is getting worse is because of the crowding on the bottom teeth.  In order for the crowding to be resolved the Invisalign clear appliances will slowly expand and round out the arch.  When the lower teeth are moved forward into a regular arch form, this in turn will bring your upper and lower front teeth closer resulting in less of an overbite.  Invisalign is painless, efficient and better periodontally for your teeth than regular braces.  I believe you should go for it!
 

In most cases Veneers are the superior alternative.  Bonding uses a resin material that is similar to plastic in it's wear rate and compression strength.  Over time bonding may need to be replaced.  Also the resin used in bonding is much more porous and may stain over time.  The esthetics of bonding is also less translucent and therefore does not look as real as natural tooth structure.  Bonding will provide an economical way of enhancing your smile, closing gaps, or fixing worn or broken teeth, but don't expect the results to be as good Veneers.  Veneers are 2 to 3 times more expensive, but are well worth it.  Veneers can be made of a porcelain material that is just as strong if not stronger than your own enamel.  Veneers also look better and won't wear away over time like bonding will.  Veneers have a much better color stability and are much more resistant to staining.  So if your goal is to correct something small and temporary then bonding might be the better choice.  But if you want stronger and better looking results, Veneers are the clear choice.
 

It all depends on what the patient's goals are.  A smilemakeover may vary from one individual to another.  Is the bite going to change?  Are the teeth crowded, spaced out unevenly, crooked, misshapen, worn, or brokien?  These are the things every dentist must consider before quoting an exact price.  I would say a good range is anywhere from $3000-$30,000. 
 

Their are absolutely NO DISADVANTAGES of getting a Cerec crown.  CEREC crowns are done in a single visit by a state of the art CAD/CAM computer and milling unit.  The accuracy of fit and the precision of the digital images are far better than any impressions or models made by an outside lab.  Furthermore, the materials used are the most similar to your own enamel as far as wear, esthetics, and flexibility.  Their is no metal in a CEREC crown, so the material is also the most bio compatible.  Expect to get 20 years or more of life out of a CEREC crown.

I can see from your photos that the reason the teeth are so crowded is due to the narrow upper and lower arches of you jaw.  Expansion of your jaws or widening of the arches will allow room for all of the teeth to be aligned without extractions.  Invisalign does expand the arches a bit, but in some cases like yours another phase of treatment must be done prior to Invisalign.  Wearing a functional retainer with expansion screws for 6-8 months prior should provide enough room for all of your teeth.  Once that phase is done Invisalign can finish the process of aligning the teeth predictably.

Their should be absolutely no pain associated with the attachment procedure.  Attachments are tooth colored buttons that are bonded to specific teeth for added anchorage and to allow the trays to dictate the proper movement.  The attachments are bonded to the enamel of the teeth in a very short amount of time.  Their is absolutely no pain or discomfort with the bonding process.  Some cases require no attachments and some require a few attachments to help with the alignment process.  The attachments usually stay on the teeth throughout the entire Invisalign treatment., and then are removed prior to the fabrication of retainers.