Islam strictly prohibits the medical or cosmetic procedures which cause harm to your body, and your intentions and ethical considerations behind this treatment are considered. Good oral hygiene and medical treatments that improve health and appearance are generally accepted in Islam. Eventually, the permissibility of dental veneers in Islam depends on certain circumstances and intentions. So it’s better to take advice from the qualified Islamic Scholar as he/she will give the appropriate advice keeping in mind Islamic principles. People sometimes are more worried and don’t find exact answers to this question it’s better to find a qualified scholar.