Hi, I completely understand your concern and how frustrating it can be to be dissatisfied with your smile, especially after undergoing orthodontic treatments. In cases like yours, alignment issues and the appearance of your teeth can be influenced by hereditary factors and individual characteristics of your dental structure. Even with the use of retainers and orthodontics, you might not achieve the aesthetic results you hope for. Given that whitening is not an option due to sensitivity and habits like coffee and tea consumption, I’d like to offer some alternatives that could help you achieve the smile you desire. 1. Invisalign with a Specialist: Although you mentioned that you’ve tried Invisalign before, considering its use again with a highly skilled specialist might be beneficial. This treatment is effective for aligning teeth and improving the profile of your smile. However, it’s important to note that Invisalign will focus on alignment but won't significantly change the color or shape of your teeth. 2. Zirconia Crowns or Veneers: Many people in similar situations find that a complete smile makeover, using zirconia crowns or veneers, is a very effective solution. These treatments allow you to change not only the color of your teeth but also their shape and size. Zirconia crowns are a durable and aesthetically pleasing option that can completely transform the appearance of your smile, giving you teeth that look natural and meet your expectations. 3. Consult with an Aesthetic Dental Specialist: If you decide to opt for a full smile transformation, it is crucial to seek a dentist with expertise in aesthetic dentistry. A specialist can evaluate your situation and provide a personalized treatment plan that addresses both functional and aesthetic aspects of your smile. Choosing between continuing alignment treatments or considering an aesthetic transformation depends on your goals and personal preferences. Exploring these options can help you find the solution that will make you feel satisfied with your smile. Sincerely, Dr. Arzate