1Zyskind K, Zyskind D, Soskolne WA, et al. Orthodontic forced eruption: case report of an alternative treatment for subgingivally fractured young permanent incisors. Quintessence Int, 1992, 23:393-399.
2Gargiulo AW, Wentz FM, Orban B. Dimensions and relationship of the dentogingival junction in humans. J Periodontol, 1961,32:261-267.
3Allen EP. Surgical crown lengthening for function and esthetics. Dent Clin North Am, 1993, 37:163-179.
4Johnson RH. Lengthening clinical crowns. J Am Dent Assoc, 1990,121:473-476.
5Palomo F, Kopczyk RA. Rationale and methods for crown lengthening. J Am Dent Assoc, 1978 ,96:257-260.
6Bragger U, Lauchenauer D, Lang NP. Surgical lengthening of the clinical crown. J Clin Periodontol, 1992, 19:58-63.
7Davarpanah M, Jansen CE, Vidjak FM, et al. Restorative and periodontal considerations of short clinical crowns. Int J Periodontics Restorative Dent, 1998, 18:424-433.