Lime teeth, also called fluorosis, are caused by living in a high fluoride area at an early age and the high concentration of fluoride in drinking water causes disorders in the development of tooth enamel, resulting in a yellowish-brown surface with surface defects and unevenness. For unattractive tooth color, you can use cold light whitening to whiten your teeth, and the treatment process requires 2-3 times of cold light whitening treatment in the hospital, or you can use home whitening kits to whiten your teeth under the guidance of your doctor. For patients with particularly severe uneven tooth surfaces, porcelain veneers can be used to restore the normal color and shape of the teeth. The porcelain veneer technique involves grinding away a thin layer of tooth enamel on the labial side of the tooth, then having the veneer made by a fabricator, and finally having the veneer cemented to the patient’s tooth surface by the doctor. For patients with particularly severe misalignment or chipped teeth, all-porcelain crown restorations can also be used to improve the shape, position and color of the tooth.