143. Puisys A, Linkevicius T. The influence of mucosal tissue thickening on crestal bone stability around bone-level implants. A prospective controlled clinical trial. Clin Oral Implants Res 2015; 26:123–129.
144. De Rouck T, Collys K, Wyn I, Cosyn J. Instant provisionalization of immediate single-tooth implants is essential to optimize esthetic treatment outcome. Clin Oral Implants Res 2009; 20:566–570.
145. Block MS, Mercante DE, Lirette D, Mohamed W, Ryser M, Castellon P. Prospective evaluation of immediate and delayed provisional single tooth restorations. J Oral Maxillofac Surg 2009; 67(11 suppl):89–107.
146. Al-Harbi SA, Edgin WA. Preservation of soft tissue contours with immediate screw-retained provisional implant crown. J Prosthet Dent 2007; 98:329–332.
147. Tarnow DP, Cho SC, Wallace SS. The effect of inter-implant distance on the height of inter-implant bone crest. J Periodontol 2000; 71:546–549.
148. Botticelli D, Persson LG, Lindhe J, Berglundh T. Bone tissue formation adjacent to implants placed in fresh extraction sockets: An experimental study in dogs. Clin Oral Implants Res 2006; 17:351–358.
149. Araújo MG, Linder E, Lindhe J. Bio-Oss collagen in the buccal gap at immediate implants: A 6-month study in the dog. Clin Oral Implants Res 2011; 22:1–8.
150. Tsuda H, Rungcharassaeng K, Kan JY, Roe P, Lozada JL, Zimmerman G. Peri-implant tissue response following connective tissue and bone grafting in conjunction with immediate single-tooth replacement in the esthetic zone: A case series. Int J Oral Maxillofac Implants 2011; 26:427–436.
151. Barone A, Ricci M, Calvo-Guirado JL, Covani U. Bone remodelling after regenerative procedures around implants placed in fresh extraction sockets: An experimental study in Beagle dogs. Clin Oral Implants Res 2011; 22:1131–1137.
152. Chen ST, Wilson TG Jr, Hämmerle CH. Immediate or early placement of implants following tooth extraction: Review of biologic basis, clinical procedures, and outcomes. Int J Oral Maxillofac Implants 2004; 19 (suppl):12–25.
153. Schwartz-Arad D, Chaushu G. The ways and wherefores of immediate placement of implants into fresh extraction sites: A literature review. J Periodontol 1997; 68:915–923.
154. Kan JY, Rungcharassaeng K, Lozada J. Immediate placement and provisionalization of maxillary anterior single implants: 1-year prospective study. Int J Oral Maxillofac Implants 2003; 18:31–39.
155. Wilson TG Jr, Buser D. Timing of anterior implant placement postextraction: Immediate versus early placement. Clin Adv Periodontics 2011; 1:61–76.
156. Huynh-Ba G, Pjetursson BE, Sanz M, et al. Analysis of the socket bone wall dimensions in the upper maxilla in relation to immediate implant placement. Clin Oral Implants Res 2010; 21:37–42.
157. Januário AL, Duarte WR, Barriviera M, Mesti JC, Araújo MG, Lindhe J. Dimension of the facial bone wall in the anterior maxilla: A cone-beam computed tomography study. Clin Oral Implants Res 2011; 22:1168–1171.
158. Cardaropoli G, Lekholm U, Wennström JL. Tissue alterations at implant-supported single-tooth replacements: A 1-year prospective clinical study. Clin Oral Implants Res 2006; 17:165–171.
159. Becker W, Ochsenbein C, Tibbetts L, Becker BE. Alveolar bone anatomic profiles as measured from dry skulls. Clinical ramifications. J Clin Periodontol 1997; 24:727–731.
160. Fickl S, Zuhr O, Wachtel H, Bolz W, Hürzeler M. Tissue alterations after tooth extraction with and without surgical trauma: A volumetric study in the beagle dog. J Clin Periodontol 2008; 35:356–363.
161. Lekovic V, Kenney EB, Weinlaender M, et al. A bone regenerative approach to alveolar ridge maintenance following tooth extraction. Report of 10 cases. J Periodontol 1997; 68:563–570.
162. Fickl S, Zuhr O, Wachtel H, Stappert CF, Stein JM, Hürzeler MB. Dimensional changes of the alveolar ridge contour after different socket preservation techniques. J Clin Periodontol 2008; 35:906–913.
163. Vittorini Orgeas G, Clementini M, De Risi V, de Sanctis M. Surgical techniques for alveolar socket preservation: A systematic review. Int J Oral Maxillofac Implants 2013; 28:1049–1061.
164. Vignoletti F, Matesanz P, Rodrigo D, Figuero E, Martin C, Sanz M. Surgical protocols for ridge preservation after tooth extraction. A systematic review. Clin Oral Implants Res 2012; 23(suppl 5):22–38.
165. Barone A, Todisco M, Ludovichetti M, et al. A prospective, randomized, controlled, multicenter evaluation of extraction socket preservation comparing two bovine xenografts: Clinical and histologic outcomes. Int J Periodontics Restorative Dent 2013; 33:795–802.
166. Lekovic V, Camargo PM, Klokkevold PR, et al. Preservation of alveolar bone in extraction sockets using bioabsorbable membranes. J Periodontol 1998; 69:1044–1049.
167. Iasella JM, Greenwell H, Miller RL, et al. Ridge preservation with freeze-dried bone allograft and a collagen membrane compared to extraction alone for implant site development: A clinical and histologic study in humans. J Periodontol 2003; 74:990–999.
168. Fu JH, Lee A, Wang HL. Influence of tissue biotype on implant esthetics. Int J Oral Maxillofac Implants 2011; 26:499–508.
169. Araújo MG, Lindhe J. Dimensional ridge alterations following tooth extraction. An experimental study in the dog. J Clin Periodontol 2005; 32:212–218.
170. Cook DR, Mealey BL, Verrett RG, et al. Relationship between clinical periodontal biotype and labial plate thickness: An in vivo study. Int J Periodontics Restorative Dent 2011; 31:345–354.
171. Belser U, Bernard JP, Buser D. Implants in the esthetic zone. In: Lindhe J, Lang NP, Karring T (eds). Clinical Periodontology and Implant Dentistry, ed 5. Hoboken, NJ: Wiley Blackwell, 2008:1146–1174.
172. Spray JR, Black CG, Morris HF, Ochi S. The influence of bone thickness on facial marginal bone response: Stage 1 placement through stage 2 uncovering. Ann Periodontol 2000; 5:119–128.
173. Teughels W, Merheb J, Quirynen M. Critical horizontal dimensions of interproximal and buccal bone around implants for optimal aesthetic outcomes: A systematic review. Clin Oral Implants Res 2009; 20(suppl 4):134–145.
174. Abrahamsson I, Berglundh T, Wennström J, Lindhe J. The peri-implant hard and soft tissues at different implant systems. A comparative study in the dog. Clin Oral Implants Res 1996; 7:212–219.
175. Linkevicius T, Apse P, Grybauskas S, Puisys A. Influence of thin mucosal tissues on crestal bone stability around implants with platform switching: A 1-year pilot study. J Oral Maxillofac Surg 2010; 68:2272–2277.
176. Happe A, Korner G. Biologic interfaces in esthetic dentistry. Part II: The peri-implant/restorative interface. Eur J Esthet Dent 2011; 6:226–251.
177. Bouri A Jr, Bissada N, AL-Zahrani MS, Faddoul F, Nouneh I. Width of keratinized gingiva and the health status of the supporting tissues around dental implants. Int J Oral Maxillofac Implants 2008; 23:323–326.
178. Adibrad M, Shahabuei M, Sahabi M. Significance of the width of keratinized mucosa on the health status of the supporting tissue around implants supporting overdentures. J Oral Implantol 2009; 35:232–237.
179. Schrott AR, Jimenez M, Hwang JW, Fiorellini J, Weber HP. Five-year evaluation of the influence of keratinized mucosa on peri-implant soft-tissue health and stability around implants supporting full-arch mandibular fixed prostheses. Clin Oral Implants Res 2009; 20:1170–1177.
180. Van der Velden U. Regeneration of the interdental soft tissues following denudation procedures. J Clin Periodontol 1982; 9:455–459.
181. Romeo E, Lops D, Rossi A, Storelli S, Rozza R, Chiapasco M. Surgical and prosthetic management of interproximal region with single-implant restorations: 1-year prospective study. J Periodontol