Veneers are thin layers of a porcelain material that are placed over the front part of the tooth. They look like natural teeth. These can be used to correct teeth that are stained and can’t be whitened by bleaching, chipped or worn teeth. close gaps and spaces between the teeth, fix alignment issues, change the overall shape and appearance of a tooth.The main difference is that a veneer covers only the front of your tooth and a crown covers the entire tooth.