Influence of placement depth and abutment connection pattern on bone remodeling around 1-stage implants: A prospective randomized controlled clinical trial

Clinical Oral Implants Research

Volumn 27, Issue 2, 2016, Pages e47-e56

  Palaska, Iro ^a   Tsaousoglou, Phoebus ^b   Vouros, Ioannis ^b   Konstantinidis, Antonis ^b   Menexes, George ^c  

^a TUFTS UNIVERSITY SCHOOL OF MEDICINE   (United States)

^b ARISTOTLE UNIVERSITY OF THESSALONIKI   (Greece)

^c ARISTOTLE UNIVERSITY OF THESSALONIKI   (Greece)

Author keywords

Bone implant interactions; Clinical assessment; Clinical research; Clinical trials; Diagnosis; Periodontology

Indexed keywords

ADULT; ALVEOLAR BONE LOSS; BONE REMODELING; COMPARATIVE STUDY; CONTROLLED STUDY; DENTAL ABUTMENT; FEMALE; HUMAN; MALE; MIDDLE AGED; PERIODONTAL INDEX; PLAQUE INDEX; PROCEDURES; PROSPECTIVE STUDY; RANDOMIZED CONTROLLED TRIAL; TOOTH IMPLANTATION; TREATMENT OUTCOME;

ADULT; ALVEOLAR BONE LOSS; BONE REMODELING; DENTAL IMPLANT-ABUTMENT DESIGN; DENTAL IMPLANTATION, ENDOSSEOUS; DENTAL PLAQUE INDEX; FEMALE; HUMANS; MALE; MIDDLE AGED; PERIODONTAL INDEX; PROSPECTIVE STUDIES; TREATMENT OUTCOME;

EID: 85000866133     PISSN: 09057161     EISSN: 16000501     Source Type: Journal    
DOI: 10.1111/clr.12527     Document Type: Article

References (98)

1. Abrahamsson, I., Berglundh, T., Wennström, J. & Lindhe, J. (1996) The peri-implant hard and soft tissues at different implant systems. A comparative study in the dog. Clinical Oral Implants Research 7: 212-219.
2. Abrahamsson, I., Berglundh, T., Glantz, P.O. & Lindhe, J. (1998) The mucosal attachment at different abutments. An experimental study in dogs. Journal of Clinical Periodontology 25: 721-727.
3. Adell, R., Lekholm, U., Rockler, B. & Brånemark, P.I. (1981) A 15-year study of osseointegrated implants in the treatment of the edentulous jaw. International Journal of Oral Surgery 10: 387-416.
4. Adell, R., Eriksson, B., Lekholm, U., Brånemark, P.I. & Jemt, T. (1990) Long-term follow-up study of osseointegrated implants in the treatment of totally edentulous jaws. International Journal of Oral & Maxillofacial Implants 5: 347-359.
5. Albrektsson, T., Zarb, G., Worthington, P. & Eriksson, A.R. (1986) The long-term efficacy of currently used dental implants: a review and proposed criteria of success. International Journal of Oral & Maxillofacial Implants 1: 11-25. Review
6. Albrektsson, T., Dahlin, C., Jemt, T., Sennerby, L., Turri, A. & Wennerberg, A. (2013) Is marginal bone loss around oral implants the result of a provoked foreign body reaction? Clinical Implant Dental Related Research 16: 155-165.
7. Albrektsson, T., Dahlin, C., Jemt, T., Sennerby, L., Turri, A. & Wennerberg, A. (2014) Is marginal bone loss around oral implants the result of a provoked foreign body reaction? Clinical Implant Dentistry and Related Research 16: 155-165.
8. Aloise, J.P., Curcio, R., Laporta, M.Z., Rossi, L., da Silva, A.M. & Rapoport, A. (2010) Microbial leakage through the implant-abutment interface of Morse taper implants in vitro. Clinical Oral Implants Research 21: 328-335.
9. Alvarez-Arenal, A., Segura-Mori, L., Gonzalez-Gonzalez, I. & Gago, A. (2013) Stress distribution in the abutment and retention screw of a single implant supporting a prosthesis with platform switching. International Journal of Oral and Maxillofacial Implants 28: 112-121.
10. Annibali, S., Bignozzi, I., Cristalli, M.P., Graziani, F., La Monaca, G. & Polimeni, A. (2012) Peri-implant marginal bone level: a systematic review and meta-analysis of studies comparing platform switching versus conventionally restored implants. Journal of Clinical Periodontology 39: 1097-1113.
11. Atieh, M.A., Ibrahim, H.M. & Atieh, A.H. (2010) Platform switching for marginal bone preservation around dental implants: a systematic review and meta-analysis. Journal of Periodontology 81: 1350-1366.
12. Baffone, G.M., Botticell, i.D., Pantani, F., Cardoso, L.C., Schweikert, M.T. & Lang, N.P. (2011) Influence of various implant platform configurations on peri-implant tissue dimensions: an experimental study in dog. Clinical Oral Implants Research 22: 438-444.
13. Barros, R.R., Novaes, A.B. Jr, Muglia, V.A., Iezzi, G. & Piattelli, A. (2010) Influence of interimplant distances and placement depth on peri-implant bone remodeling of adjacent and immediately loaded Morse cone connection implants: a histomorphometric study in dogs. Clinical Oral Implants Research 21: 371-378.
14. Bateli, M., Att, W. & Strub, J.R. (2011) Implant neck configurations for preservation of marginal bone level: a systematic review. International Journal of Oral and Maxillofacial Implants 26: 290-303.
15. Broggini, N., McManus, L.M., Hermann, J.S., Medina, R.U., Oates, T.W., Schenk, R.K., Buser, D., Mellonig, J.T. & Cochran, D.L. (2003) Persistent acute inflammation at the implant-abutment interface. Journal of Dental Research 82: 232-237.
16. Broggini, N., McManus, L.M., Hermann, J.S., Medina, R., Schenk, R.K., Buser, D. & Cochran, D.L. (2006) Peri-implant inflammation defined by the implant-abutment interface. Journal of Dental Research 85: 473-478.
17. Buser, D., Mericske-Stern, R., Bernard, J.P., et al. (1997) Long-term evaluation of non-submerged ITI implants. Part 1: 8-year life table analysis of a prospective multi-center study with 2359 implants. Clinical Oral Implants Research 8: 161-172.
18. Buser, D., Belser, U.C. & Lang, N.P. (1998) The original one-stage dental implant system and its clinical application. Periodontology 2000 17: 106-118. Review.
19. Calvo-Guirado, J.L., Gómez-Moreno, G., Delgado-Ruiz, R.A., Sánchez, M., de Val, J.E., Negri, B. & Ramírez Fernández, M.P. (2014) Clinical and radiographic evaluation of osseotite-expanded platform implants related to crestal bone loss: a 10-year study. Clinical Oral Implants Research 25: 352-358.
20. Canullo, L., Fedele, G.R., Iannello, G. & Jepsen, S. (2010) Platform switching and marginal bone-level alterations: the results of a randomized-controlled trial. Clinical Oral Implants Research 21: 115-121.
21. Canullo, L., Goglia, G., Iurlaro, G. & Iannello, G. (2009) Short-term bone level observations associated with platform switching in immediately placed and restored single maxillary implants: a preliminary report. International Journal of Prosthodontics 22: 277-282.
22. Canullo, L., Iannello, G., Peñarocha, M. & Garcia, B. (2012) Impact of implant diameter on bone level changes around platform switched implants: preliminary results of 18 months follow-up a prospective randomized match-paired controlled trial. Clinical Oral Implants Research 23: 1142-1146.
23. Cappiello, M., Luongo, R., Di Iorio, D., Bugea, C., Cocchetto, R. & Celletti, R. (2008) Evaluation of peri-implant bone loss around platform-switched implants. International Journal of Periodontics and Restorative Dentistry 28: 347-355.
24. Chang, C.L., Chen, C.S. & Hsu, M.L. (2010) Biomechanical effect of platform switching in implant dentistry: a three-dimensional finite element analysis. International Journal of Oral and Maxillofacial Implants 25: 295-304.
25. Chou, C.T., Morris, H.F., Ochi, S., Walker, L. & DesRosiers, D. (2004) AICRG, Part II: Crestal bone loss associated with the Ankylos implant: loading to 36 months. Journal of Oral Implantology 30: 134-143.
26. Chou, H.Y., Müftü, S. & Bozkaya, D. (2010) Combined effects of implant insertion depth and alveolar bone quality on periimplant bone strain induced by a wide-diameter, short implant and a narrow-diameter, long implant. Journal of Prosthetic Dentistry 104: 293-300.
27. Cocchetto, R., Traini, T., Caddeo, F. & Celletti, R. (2010) Evaluation of hard tissue response around wider platform-switched implants. International Journal of Periodontics and Restorative Dentistry 30: 163-171.
28. Cochran, D.L., Bosshardt, D.D., Grize, L., Higginbottom, F.L., Jones, A.A., Jung, R.E., Wieland, M. & Dard, M. (2009) Bone response to loaded implants with non-matching implant-abutment diameters in the canine mandible. Journal of Periodontology 80: 609-617.
29. Cumbo, C., Marigo, L., Somma, F., La Torre, G., Minciacchi, I. & D'Addona, A. (2013) Implant platform switching concept: a literature review. European Review for Medical and Pharmacological Sciences 17: 392-397.
30. D' Ercole, S., Tripodi, D., Ravera, L., Perrotti, V., Piattelli, A. & Iezzi, G. (2014) Bacterial leakage in morse cone internal connection implants using different torque values: an in vitro study. Implant Dentistry 23: 175-179.
31. Den Hartog, L., Meijer, H.J., Stegenga, B., Tymstra, N., Vissink, A. & Raghoebar, G.M. (2011) Single implants with different neck designs in the aesthetic zone: a randomized clinical trial. Clinical Oral Implants Research 22: 1289-1297.
32. Donnenfeld, O.W., Mark, R.M. & Glickman, I. (1964) The apically repositioned flap - a clinical study. Journal of Periodontology 35: 381-387.
33. Donovan, R., Fetner, A., Koutouzis, T. & Lundgren, T. (2010) Crestal bone changes around implants with reduced abutment diameter placed non-submerged and at subcrestal positions: a 1-year radiographic evaluation. Journal of Periodontology 81: 428-434.
34. Eliasson, A., Blomqvist, F., Wennerberg, A. & Johansson, A. (2009) A retrospective analysis of early and delayed loading of full-arch mandibular prostheses using three different implant systems: clinical results with up to 5 years of loading. Clinical Implant Dentistry and Related Research 11: 134-148.
35. Engelhardt, S., Papacosta, P., Rathe, F., Ozen, J., Jansen, J.A. & Junker, R. (2014) Annual failure rates and marginal bone-level changes of immediate compared to conventional loading of dental implants. A systematic review of the literature and meta-analysis. Clinical Oral Implants Research doi: 10.1111/clr.12363. [Epub ahead of print].
36. Engquist, B., Astrand, P., Dahlgren, S., Engquist, E., Feldmann, H. & Gröndahl, K. (2002) Marginal bone reaction to oral implants: a prospective comparative study of Astra Tech and Brånemark System implants. Clinical Oral Implants Research 13: 30-37.
37. Faul, F., Erdfelder, E., Lang, A.G. & Buchner, A. (2007) G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behavior Research Methods 39: 175-191.
38. Fickl, S., Zuhr, O., Stein, J.M. & Hürzeler, M.B. (2010) Peri-implant bone level around implants with platform-switched abutments. International Journal of Oral Maxillofacial Implants 25: 577-581.
39. Finger, I.M., Castellon, P., Block, M. & Elian, N. (2003) The evolution of external and internal implant/abutment connections. Practical Procedures and Aesthetic Dentistry 15: 625-632.
40. Galindo-Moreno, P., León-Cano, A., Ortega-Oller, I., Monje, A., O Valle, F. & Catena, A. (2014) Marginal bone loss as success criterion in implant dentistry: beyond 2 mm. Clinical Oral Implants Research 3: doi: 10.1111/clr.12324. [Epub ahead of print].
41. Gultekin, B.A., Gultekin, P., Leblebicioglu, B., Basegmez, C. & Yalcin, S. (2013) Clinical evaluation of marginal bone loss and stability in two types of submerged dental implants. International Journal of Oral and Maxillofacial Implants 28: 815-823.
42. Hanaoka, M., Gehrke, S.A., Mardegan, F., Gennari, C.R., Taschieri, S., Del Fabbro, M. & Corbella, S. (2014) Influence of implant/abutment connection on stress distribution to implant-surrounding bone: a finite element analysis. Journal of Prosthodontics 23: 565-571.
43. Hermann, J.S., Buser, D., Schenk, R.K. & Cochran, D.L. (2000) Crestal bone changes around titanium implants. A histometric evaluation of unloaded non-submerged and submerged implants in the canine mandible. Journal of Periodontology 71: 1412-1424.
44. Hermann, J.S., Buser, D., Schenk, R.K., Schoolfield, J.D. & Cochran, D.L. (2001a) Biologic Width around one- and two-piece titanium implants. Clinical Oral Implants Research 12: 559-571.
45. Hermann, F., Lerner, H. & Palti, A. (2007) Factors influencing the preservation of the periimplant marginal bone. Implant Dentistry 16: 165-175.
46. Hermann, J.S., Schoolfield, J.D., Schenk, R.K., Buser, D. & Cochran, D.L. (2001b) Influence of the size of the microgap on crestal bone changes around titanium implants. A histometric evaluation of unloaded non-submerged implants in the canine mandible. Journal of Periodontology 72: 1372-1383.
47. Huang, B., Meng, H., Piao, M., Xu, L., Zhang, L. & Zhu, W. (2012) Influence of placement depth on bone remodeling around tapered internal connection implant: a clinical and radiographic study in dogs. Journal of Periodontology 83: 1164-1171.
48. Iglhaut, G., Schwarz, F., Winter, R.R., Mihatovic, I., Stimmelmayr, M. & Schliephake, H. (2014) Epithelial attachment and downgrowth on dental implant abutments-a comprehensive review. Journal of Esthetic and Restorative Dentistry 26: 324-331.
49. Isidor, F. (1997) Clinical probing and radiographic assessment in relation to the histologic bone level at oral implants in monkeys. Clinical Oral Implants Research 8: 255-264.
50. Jones, A.A. & Cochran, D.L. (2006) Consequences of implant design. Dental Clinics of North America 50: 339-360, Review.
51. Jung, R.E., Jones, A.A., Higginbottom, F.L., Wilson, T.G., Schoolfield, J., Buser, D., Hämmerle, C.H. & Cochran, D.L. (2008) The influence of non-matching implant and abutment diameters on radiographic crestal bone levels in dogs. Journal of Periodontology 79: 260-270.
52. Kan, J.Y., Morimoto, T., Rungcharassaeng, K., Roe, P. & Smith, D.H. (2010) Gingival biotype assessment in the esthetic zone: visual versus direct measurement. International Journal of Periodontics and Restorative Dentistry 30: 237-243.
53. King, G.N., Hermann, J.S., Schoolfield, J.D., Buser, D. & Cochran, D.L. (2002) Influence of the size of the microgap on crestal bone levels in non-submerged dental implants: a radiographic study in the canine mandible. Journal of Periodontology 73: 1111-1117.
54. Kohler, C.A. & Ramfjord, S.P. (1960) Healing of gingival mucoperiostal flaps. Oral Surgery, Oral Medicine, and Oral Pathology 13: 89-103.
55. Konermann, A.C., Zoellner, A., Chang, B.M. & Wright, R.F. (2010) In vitro study of the correlation between the simulated clinical and radiographic examination of microgaps at the implant-abutment interface. Quintessence International 41: 681-687.
56. Koutouzis, T., Wallet, S., Calderon, N. & Lundgren, T. (2011) Bacterial colonization of the implant-abutment interface using an in vitro dynamic loading model. Journal of Periodontology 82: 613-618.
57. Laurell, L. & Lundgren, D. (2011) Marginal bone level changes at dental implants after 5 years in function: a meta-analysis. Clinical Implant Dentistry and Related Research 13: 19-28.
58. Lazzara, R.J. & Porter, S.S. (2006) Platform switching: a new concept in implant dentistry for controlling postrestorative crestal bone levels. International Journal of Periodontics and Restorative Dentistry 26: 9-17.
59. Lekholm, U., Gunne, J., Henry, P., Higuchi, K., Lindén, U., Bergström, C. & van Steenberghe, D. (1999) Survival of the Brånemark implant in partially edentulous jaws: a 10-year prospective multicenter study. International Journal of Oral and Maxillofacial Implants 14: 639-645.
60. Lindquist, L.W., Carlsson, G.E. & Jemt, T. (1996) A prospective 15-year follow-up study of mandibular fixed prostheses supported by osseointegrated implants. Clinical results and marginal bone loss. Clinical Oral Implants Research 7: 329-336.
61. Luongo, R., Traini, T., Guidone, P.C., Bianco, G., Cocchetto, R. & Celletti, R. (2008) Hard and soft tissue responses to the platform-switching technique. International Journal of Periodontics and Restorative Dentistry 28: 551-557.
62. Maeda, Y., Miura, J., Taki, I. & Sogo, M. (2007) Biomechanical analysis on platform switching: is there any biomechanical rationale? Clinical Oral Implants Research 18: 581-584.
63. Mangano, C., Mangano, F., Piattelli, A., Iezzi, G., Mangano, A. & La Colla, L. (2009) Prospective clinical evaluation of 1920 Morse taper connection implants: results after 4 years of functional loading. Clinical Oral Implants Research 20: 254-261.
64. Mangano, C., Mangano, F., Shibli, J.A., Tettamanti, L., Figliuzzi, M., d'Avila, S., Sammons, R.L. & Piattelli, A. (2011) Retrospective evaluation of 2, 549 Morse taper connection implants: 1- to 6-year data. Journal of Periodontology 82: 52-61.
65. Mombelli, A., van Oosten, M.A., Schurch, E. Jr & Land, N.P. (1987) The microbiota associated with successful or failing osseointegrated titanium implants. Oral Microbiology and Immunology 2: 145-151.
66. Needleman, I., Chin, S., O'Brien, T., Petrie, A. & Donos, N. (2012) Systematic review of outcome measurements and reference group(s) to evaluate and compare implant success and failure. Journal of Clinical Periodontology 39: 122-132.
67. Negri, B., Calvo-Guirado, J.L., Pardo-Zamora, G., Ramírez-Fernández, M.P., Delgado-Ruíz, R.A. & Muñoz-Guzón, F. (2012b) Peri-implant bone reactions to immediate implants placed at different levels in relation to crestal bone. Part I: a pilot study in dogs. Clinical Oral Implants Research 23: 228-235.
68. Negri, B., Calvo-Guirado, J.L., Ramírez-Fernández, M.P., Maté Sánchez-de Val, J., Guardia, J. & Muñoz-Guzón, F. (2012a) Peri-implant bone reactions to immediate implants placed at different levels in relation to crestal bone. Part II: a pilot study in dogs. Clinical Oral Implants Research 23: 236-244.
69. Novaes, A.B., Barros, R.R., Muglia, V.A. & Borges, G.J.. (2009) Influence of interimplant distances and placement depth on papilla formation and crestal resorption: a clinical and radiographic study in dogs. Journal of Oral Implantology 35: 18-27.
70. Oh, T.J., Yoon, J., Misch, C.E. & Wang, H.L. (2002) The causes of early implant bone loss: myth or science? Journal of Periodontology 73: 322-333. Review.
71. Papaspyridakos, P., Chen, C.J., Singh, M., Weber, H.P. & Gallucci, G.O. (2012) Success criteria in implant dentistry: a systematic review. Journal of Dental Research 91: 242-248. Review.
72. Piattelli, A., Vrespa, G., Petrone, G., Iezzi, G., Annibali, S. & Scarano, A. (2003) Role of the microgap between implant and abutment: a retrospective histologic evaluation in monkeys. Journal of Periodontology 74: 346-352.
73. Pieri, F., Aldini, N.N., Marchetti, C. & Corinaldesi, G. (2011) Influence of implant-abutment interface design on bone and soft tissue levels around immediately placed and restored single-tooth implants: a randomized controlled clinical trial. International Journal of Oral and Maxillofacial Implants 26: 169-178.
74. Piermatti, J., Yousef, H., Luke, A., Mahevich, R. & Weine, R.S.. (2006) An in vitro analysis of implant screw torque loss with external hex and internal connection implant systems. Implant Dentistry 15: 427-435.
75. Pontes, A.E., Ribeiro, F.S., da Silva, V.C., Margonar, R., Piattelli, A., Cirelli, J.A. & Marcantonio, E. Jr. (2008a) Clinical and radiographic changes around dental implants inserted in different levels in relation to the crestal bone, under different restoration protocols, in the dog model. Journal of Periodontology 79: 486-494.
76. Pontes, A.E., Ribeiro, F.S., Iezzi, G., Piattelli, A., Cirelli, J.A. & Marcantonio, E. Jr.. (2008b) Biologic width changes around loaded implants inserted in different levels in relation to crestal bone: histometric evaluation in canine mandible. Clinical Oral Implants Research 19: 483-490.
77. Pozzi, A., Agliardi, E., Tallarico, M. & Barlattani, A. (2014) Clinical and radiological outcomes of two implants with different prosthetic interfaces and neck configurations: randomized, controlled, split-mouth clinical trial. Clinical Implant Dentistry and Related Research 16: 96-106.
78. Qian, J., Wennerberg, A. & Albrektsson, T. (2012) Reasons for marginal bone loss around oral implants. Clinical Implant Dentistry and Related Research 14: 792-807.
79. Raoofi, S., Khademi, M., Amid, R., Kadkhodazadeh, M. & Movahhedi, M.R. (2013) Comparison of the effect of three abutment-implant connections on stress distribution at the internal surface of dental implants: a finite element analysis. Journal of Dental Research, Dental Clinics, Dental Prospects 7: 132-139.
80. Romanos, G.E., Aydin, E., Gaertner, K. & Nentwig, G.H. (2013) Long-term results after subcrestal or crestal placement of delayed loaded implants. Clinical Implant Dentistry and Related Research 15: doi: 10.1111/cid.12084. [Epub ahead of print].
81. Schwartz-Arad, D., Laviv, A. & Levin, L. (2008) Failure causes, timing, and cluster behavior: an 8-year study of dental implants. Implant Dentistry 17: 200-207.
82. Schmitt, C.M., Nogueira-Filho, G., Tenenbaum, H.C., Lai, J.Y., Brito, C., Döring, H. & Nonhoff, J. (2014) Performance of conical abutment (Morse Taper) connection implants: a systematic review. Journal of Biomedical Material Research Part A 102: 552-574.
83. Singh, R., Singh, S.V. & Arora, V. (2013) Platform switching: a narrative review. Implant Dentistry 22: 453-459.
84. Strietzel, F.P., Neumann, K. & Hertel, M. (2014) Impact of platform switching on marginal peri-implant bone-level changes. A systematic review and meta-analysis. Clinical Oral Implants Research 20: 1-17.
85. Tatarakis, N., Bashutski, J., Wang, H.L. & Oh, T.J. (2012) Early implant bone loss: preventable or inevitable? Implant Dentistry 21: 379-386.
86. Tesmer, M., Wallet, S., Koutouzis, T. & Lundgren, T. (2009) Bacterial colonization of the dental implant fixture-abutment interface: an in vitro study. Journal of Periodontology 80: 1991-1997.
87. Todescan, F.F., Pustiglioni, F.E., Imbronito, A.V., Albrektsson, T. & Gioso, M. (2002) Influence of the microgap in the peri-implant hard and soft tissues: a histomorphometric study in dogs. International Journal of Oral and Maxillofacial Implants 17: 467-472.
88. Tripodi, D., Vantaggiato, G., Scarano, A., Perrotti, V., Piattelli, A., Iezzi, G. & D'Ercole, S. (2012) An in vitro investigation concerning the bacterial leakage at implants with internal hexagon and Morse taper implant-abutment connections. Implant Dentistry 21: 335-339.
89. Tsoukaki, M., Kalpidis, C.D., Sakellari, D., Tsalikis, L., Mikrogiorgis, G. & Konstantinidis, A. (2013) Clinical, radiographic, microbiological, and immunological outcomes of flapped vs. flapless dental implants: a prospective randomized controlled clinical trial. Clinical Oral Implants Research 24: 969-976.
90. Ugurel, C.S., Steiner, M., Isik-Ozkol, G., Kutay, O. & Kern, M. (2013) Mechanical resistance of screwless morse taper and screw-retained implant-abutment connections. Clinical Oral Implants Research 9: doi: 10.1111/clr.12303. [Epub ahead of print].
91. Vela-Nebot, X., Rodríguez-Ciurana, X., Rodado-Alonso, C. & Segalà-Torres, M. (2006) Benefits of an implant platform modification technique to reduce crestal bone resorption. Implant Dentistry 15: 313-320.
92. Watzak, G., Zechner, W., Ulm, C., Tangl, S., Tepper, G. & Watzek, G. (2005) Histologic and histomorphometric analysis of three types of dental implants following 18 months of occlusal loading: a preliminary study in baboons. Clinical Oral Implants Research. 16: 408-416.
93. Welander, M., Abrahamsson, I. & Berglundh, T. (2009) Subcrestal placement of two-part implants. Clinical Oral Implants Research 20: 226-231.
94. Weng, D., Nagata, M.J., Bell, M., Bosco, A.F., de Melo, L.G. & Richter, E.J. (2008) Influence of microgap location and configuration on the periimplant bone morphology in submerged implants. An experimental study in dogs. Clinical Oral Implants Research 19: 1141-1147.
95. Weng, D., Nagata, M.J., Bell, M., de Melo, L.G. & Bosco, A.F. (2010) Influence of microgap location and configuration on peri-implant bone morphology in nonsubmerged implants: an experimental study in dogs. International Journal of Oral and Maxillofacial Implants 25: 540-547.
96. Weng, D., Nagata, M.J., Leite, C.M., de Melo, L.G. & Bosco, A.F. (2011) Influence of microgap location and configuration on radiographic bone loss in nonsubmerged implants: an experimental study in dogs. International Journal of Prosthodontics 24: 445-452.
97. Wenzel, B.A., Gamborena, I., Lee, J., Fiorini, T., Schüpbach, P., Wikesjö, U.M. & Susin, C. (2014) Effect of Platform Shift on Crestal Bone Levels and Mucosal Profile Following Flap Surgery and Subcrestal Implant Placement in Presence/Absence of Gap Defects. Clinical Implant Dental and Related Research doi: 10.1111/cid.12216. [Epub ahead of print].
98. Xia, H., Wang, M., Ma, L., Zhou, Y., Li, Z. & Wang, Y. (2013) The effect of platform switching on stress in peri-implant bone in a condition of marginal bone resorption: a three-dimensional finite element analysis. International Journal of Oral and Maxillofacial Implants 28: 122-127.