Abstract
Porcelain laminate veneer（PLV）restoration is generally accepted as one of aesthetic dental treatment to improve the discoloration of teeth. However, few long-term clinical studies have been reported. The present report shows a 25-year clinical follow-up case of PLV restorations that were carried out to improve severe discoloration of the maxillary anterior teeth（321 123）by tetracycline.
Nine years after the first restorative treatment, partial fractures around cervical area of PLV on 23 were observed. These fractured PLV of 23 were removed, and re-restored by new PLVs. Twenty-five years after the first restoration, all PLVs were re-treatment because of the color change
https://ror.org/03bwzch55 
