1. Magne P, Gallucci GO, Belser UC. Anatomic crown width/length ratios of unworn and worn maxillary teeth in white subjects. J Prosthet Dent. 2003; 89:453–61. DOI:
10.1016/S0022-3913(03)00125-2. PMID:
12806322.
2. Dong JK, Jin TH, Cho HW, Oh SC. The esthetics of the smile:a review of some recent studies. Int J Prosthodont. 1999; 12:9–19. PMID:
10196823.
3. Radia S, Sherriff M, McDonald F, Naini FB. Relationship between maxillary central incisor proportions and facial proportions. J Prosthet Dent. 2016; 115:741–8. DOI:
10.1016/j.prosdent.2015.10.019. PMID:
26794701.
4. Marcuschamer E, Tsukiyama T, Griffin TJ, Arguello E, Gallucci GO, Magne P. Anatomical crown width/length ratios of worn and unworn maxillary teeth in Asian subjects. Int J Periodontics Restorative Dent. 2011; 31:495–503. PMID:
21845244.
7. Lee EA. Esthetic Crown Lengthening:Contemporary Guidelines for Achieving Ideal Gingival Architecture and Stability. Curr Oral Health Rep. 2017; 4:105–11. DOI:
10.1007/s40496-017-0140-4.
8. Al-Harbi F, Ahmad I. A guide to minimally invasive crown lengthening and tooth preparation for rehabilitating pink and white aesthetics. Br Dent J. 2018; 224:228–34. DOI:
10.1038/sj.bdj.2018.121. PMID:
29472662.
10. Mahn DH. Elimination of a “Gummy Smile” With Crown Lengthening and Lip Repositioning. Compend Contin Educ Dent. 2016; 37:52–5. PMID:
26863221.
11. Silva CO, Ribeiro-Júnior NV, Campos TV, Rodrigues JG, Tatakis DN. Excessive gingival display:treatment by a modified lip repositioning technique. J Clin Periodontol. 2013; 40:260–5. DOI:
10.1111/jcpe.12046. PMID:
23278672.
12. Miyazaki T, Nakamura T, Matsumura H, Ban S, Kobayashi T. Current status of zirconia restoration. J Prosthodont Res. 2013; 57:236–61. DOI:
10.1016/j.jpor.2013.09.001. PMID:
24140561.