Thank you for your question. Temporary veneers are often used as a trial aesthetic run for your porcelain veneers. Think of them as a mock-up of the real thing. If you don't like the size, shape or color of your temporary veneers I suggest you talk to your dentist right away. Sometimes, a dentist may need to make them a certain size or shape due to issues related to bite or vertical mechanics of the teeth. I would suggest talking to your provider right away.
The optimal way to do this case is to braces to regain the space for your missing laterals then have dental implants placed. The braces would probably take 18-24 months.
I am sorry to hear you are having complications after your implant surgery. To answer your question, yes there are ways to correct the gum defect. They would involve evaluation of the implant for placement angulation, stability and to rule out infection. Assuming the implants is healthy and properly placed, you will most likely need a corrective graft surgery in that area of your gums to stabilize tissue and improve aesthetics.
In your case the lateral incisors being undersized and slightly out of position would make you an ideal candidate for veneers. I would recommend having a diagnostic wax-up done where a prototype is built based on those models. The wax-up can provide provisionals while your porcelain is being made (if you go that route) and help you and your dentist design your final smile. If you decide on only 2-4 veneers than the veneers will be custom made to your exact tooth shade. Custom shaded teeth with natural luminosity and opacity will create an aesthetically beautiful outcome with no downtime or speech impediment.
Thank you for the question. For a mild gummy smile, a gingivectomy done with a laser can remove excess soft tissue and increase the amount of exposed tooth surface creating a beautiful, natural smile. If someone has a severe gummy smile, we can do something called aesthetic crown lengthening, which removes some bone and some tissue to reduce display of gum tissue. There is also a procedure that can release and lengthen the upper lip to cover more of the gum tissue. A trained and experienced dentist can assess how much of your tooth is beneath the exposed gum and proceed accordingly.