á c a s e r e p o r t The position of an implant in the three di- mensions of space and its angulation remains fundamental for a periodontal, functional and aesthetic result (Saadoun et al. 1992). The mesio-distal position determines the im- plant selection and the interdental papilla vol- ume. The buccal palatal orientation deter- mines the length of the implant crown restoration. The corono-apical location de- termines the emergence profile and peri-im- plant sulcus depth (Saadoun 2000). The routine use of guided bone regeneration (GBR) procedures or other recent techniques (PRP), has resulted in the increased place- ment of implant-supported restorations that eliminate the need for adjacent tooth prepa- ration required by traditional fixed partial dentures and thus allows the surrounding tooth structures to remain intact. The blend- ing together of biological sciences with clinical applications, working in cooperation with commercial resources, has provided contem- porary practitioners with the products of to- morrow in order to predictably simulate na- ture’s aesthetics (Silverstein 2002). References Abbou M. Primary stability and osteointegration: prelim- inary clinical results with the tapered diminishing threads implants. Pract. Proc. Aesth. Dent. 15(2)161–168, 2003. Albrektsson T, Dahl E, Enbom L. Osseo-integrated oral implants : a swedish multicenter study of 8139 consec- utively inserted Nobelpharma implants. J. Periodon- tol. 59:287–296, 1998. Atwood D., Some clinical factors related to the rate of re- sorption of residual ridges. J Prosth Dent; 12:441–447, 1962. El Askary A. Reconstructive Aesthetic Implant Surgery; 45–59 Blackwell Munksgaard, 2003. Esposito M, Ekestubbe A, Grondahl K., Radiological eval- uation of marginal bone loss of tooth surfaces facing single Branemark implants. Clin Oral Impl Res. 4(3):151–157, 1993. Garber D., Belser U., Restoration-Driven Implant Place- ment with restoration generated site development. Comp Cont Educ Dent, 16(8):796–804, 1995. Hebel K, Gaijar R., Achieving superior aesthetic results: parameters for implant and abutment selection. Int J Dent Symp; 4:42–47, 1997. Jemt T, Laney W, Harris D, Osseointegrated implants for single tooth replacement: a 1-year report from a multi- center prospective study. Int J Oral Maxillofac Im- plants; 6:29–36, 1991. Jovanovic S, Paul DJ, Nishimura R. Anterior implant-sup- ported reconstructions. A surgical challenge. Pract Pe- riodontol Aesth Dent; 11(5):551–558, 1999. Le Gall M.G., Lauret J.F. in “Occlusion et Fonction”. CDP Ed. Paris, 2002. Olson M., Lindhe J, Marinello C., On the relationship be- tween crown form and clinical features in the gingiva in adolescents. J Clin Periotontol. 20:570–577, 1993. Palacci P., Ericsson I., Esthetic Implant Dentistry: Soft and Hard Tissue Management. Quintessence Books, Berlin, 2001. Palacci P: Branemark implants and esthetic in the upper anterior segment. J. Parodontol. Impl. orale; 22(2):95–1407, 2002. Rosenlicht J.: SwissPlus implant system, part 1: Surgical aspects and intersystem comparisons. Impl Dent. 2(11):144–153, 2002. Saadoun AP, LeGall M. Implant positioning for peri- odontal, functional and aesthetic result. Pract. Perio Aesthet Dent 4(7):43–54, 1992. Saadoun AP, LeGall M., Touati B., Selection and Ideal Tridimensional Implant Position for Soft Tissue Aes- thetics, Pract Periodont Aesth Dent; 11(9):1063–1072, 1999. Saadoun A., Selection et position tridimensionnelle im- plantaire en dentisterie esthétique. Alpha Omega News; 56:33, 2000. Salama H, Salama M, Garber D, The interproximal height of bone : the guide post to predictable aesthetic strate- gies and soft tissue contours in anterior tooth replace- ment. Pract. Perio Aesth Dent; 9:1121–1141, 1998. Salama M., Tarnow D, The Effect of the Inter-implant vertical distance on the papilla. Communication AAP, New Orleans, 2002. Silverstein L: The key to the contemporary restorative dentistry. Pract Proced Aesth Dent; 14(2):120, 2002. Small P., Tarnow D., Gingival recession around implant: a 1 year longitudinal prospective study. Int. J. Oral Maxillofac Impl; 14(4):527–532, 2000. Small P., Tarnow D., Cho S. : Gingival recession around wide diameter versus standard diameter implants: a 3 to 5 years longitudinal prospective study. Pract. Proc. Aesth. Dent.,13(2):143–146, 2001. Tal H. Relationship between the interproximal distance of roots and the prevalence of intra bony-pockets. J.Pe- riodontol. 55:604–607, 1983. Tarnow D, Magne A, Fletcher P, The effect from the dis- tance front the contact point to the crest of one on the presence or absence of interproximal dental papilla. J Periodontol 63(12):995–996, 1992. Tarnow D: The effect of inter-implant distance on the height of inter-implant bone crest. J. Periodontol.; 71(14):546–549, 2000. Weisgold A, Arnoux JP, Lu J., Single-tooth anterior im- plant: a word of caution. Part 1, J Esthet Dent, 9(5):225–233, 1997. Wörhle P, Single-tooth replacement in the aesthetic zone with immediate provisionalisation: fourteen consecu- tive cases reports. Pract Periodont Aesth Dent 10(9):107–114, 1998. á a u t h o r ’s a d d r e s s Dr André P. SAADOUN, DDS,MS Associate Professor University of Southern California Diplomate of the American Academy of Periodontology, ICOI 12, Avenue Paul Doumer 75116 Paris, France Phone: +33-1 -47 27 17 57, Fax: +33-1 -47 55 00 96 E-mail: andre.p.saadoun@wanadoo.fr Dr Marcel G. LeGall, DDS Diplomate of the ICOI Master of the American Academy of Implant Prosthodontics 42 Rue de la Belle Fontaine 56100 Lorient, France E-mail: mglegall@club-internet.fr 18 4 2003