1
B. E. Pjetursson, U. Brägger, N. P. Lang and M. Zwahlen, Clinical Oral Implants Research, 2007, 18, 97–113.
2
Philip B. Sugerman and M.T. Barber, International Journal of Oral & Maxillofacial Implants.
3
Joseph P. Fiorellini, P.K. Chen, M. Nevins and M.L. Nevins, International Journal of  Periodontics & Restorative Dentistry.
4
S. L. Ruggiero, B. Mehrotra, T. J. Rosenberg and S. L. Engroff, Journal of Oral and Maxillofacial Surgery, 2004, 62, 527–534.
5
S.-B. Woo, J.W. Hellstein and J.R. Kalmar, Annals of Internal Medicine, , DOI:10.7326/0003-4819-144-10-200605160-00009.
6
T. D. Taylor, J. Wiens and A. Carr, The Journal of Prosthetic Dentistry, 2005, 94, 555–560.
7
Catherine Giannopoulou, J.P. Bernard, Daniel Buser, A. Carrel and U.C. Belser, International Journal of Oral & Maxillofacial Implants.
8
Daniel Buser, W. Martin and U.C. Belser, International Journal of Oral & Maxillofacial Implants.
9
U. C. Belser, D. Buser, D. Hess, B. Schmid, J.-P. Bernard and N. P. Lang, Periodontology 2000, 1998, 17, 132–150.
10
D. P. Tarnow, S. C. Cho and S. S. Wallace, Journal of Periodontology, 2000, 71, 546–549.
11
N. U. Zitzmann, C. P. Marinello, N. U. Zitzmann and C. P. Marinello, The Journal of Prosthetic Dentistry, 1999, 82, 188–196.
12
C. Dent, J.W. Olson, S.E. Farish, J. Bellome, A.J. Casino, H.F. Morris and S. Ochi, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons, 1997, 55, 19–24.
13
G. W. Gynther, P. Å. Köndell, L.-E. Moberg and A. Heimdahl, Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, 1998, 85, 509–511.
14
S. Luterbacher, L. Mayfield, U. Bragger and N. P. Lang, Clinical Oral Implants Research, 2000, 11, 521–529.
15
Gross, M., Journal of Oral Rehabilitation, , DOI:10.1111/1365-2842.ep14769372.
16
T. Lindh, J. Gunne, E. Nystrom and T. Back, Clinical Oral Implants Research, 2001, 12, 441–449.
17
C. Frei, D. Buser and K. Dula, Clinical Oral Implants Research, 2004, 15, 490–497.
18
I. K. Karoussis, G. E. Salvi, L. J. A. Heitz-Mayfield, U. Bragger, C. H. F. Hammerle and N. P. Lang, Clinical Oral Implants Research, 2003, 14, 329–339.
19
V. Baelum and B. Ellegaard, Journal of Periodontology, 2004, 75, 1404–1412.
20
M. Quirynen, R. Vogels, G. Alsaadi, I. Naert, R. Jacobs and D. van Steenberghe, Clinical Oral Implants Research, 2005, 16, 599–608.
21
M. Quirynen, W. Peeters, D. van Steenberghe, I. Naert, W. Coucke and D. van Steenberghe, Clinical Oral Implants Research, 2001, 12, 589–594.
22
J. L. Wennstrom, A. Ekestubbe, K. Grondahl, S. Karlsson and J. Lindhe, Journal of Clinical Periodontology, 2004, 31, 713–724.
23
G. Alsaadi, M. Quirynen, A. Komárek and D. van Steenberghe, Journal of Clinical Periodontology, 2007, 34, 610–617.
24
H. L. Craddock and C. C. Youngson, British Dental Journal, 2004, 196, 341–348.
25
M. R. Wood and S. G. Vermilyea, The Journal of Prosthetic Dentistry, 2004, 92, 447–462.
26
J. F. Gastaldo, P. R. Cury and W. R. Sendyk, Journal of Periodontology, 2004, 75, 1242–1246.
27
C. Goodacre and M. Torabinejad, The Journal of the American Dental Association, 2006, 137, 973–977.
28
ADA council on scientific affairs, The Journal of the American Dental Association, 2004, 135, 92–97.
29
W. Chee and S. Jivraj, British Dental Journal, 2006, 201, 629–632.
30
S. Jivraj and W. Chee, British Dental Journal, 2006, 201, 699–708.
31
Peter K. Moy, D. Medina, V. Shetty and T.L Aghaloo, International Journal of Oral & Maxillofacial Implants.
32
S. K. Chuang, L.J. Wei, C.W. Douglass and T.B. Dodson, Journal of Dental Research.
33
D. Tarnow, N. Elian, P. Fletcher, S. Froum, A. Magner, S.-C. Cho, M. Salama, H. Salama and D. A. Garber, Journal of Periodontology, 2003, 74, 1785–1788.
34
S. Schou, P. Holmstrup, H. V. Worthington and M. Esposito, Clinical Oral Implants Research, 2006, 17, 104–123.
35
L. A. Chambrone and L. Chambrone, Journal of Clinical Periodontology, 2006, 33, 759–764.
36
A. Mombelli and N. Cionca, Clinical Oral Implants Research, 2006, 17, 97–103.
37
M. Lulic, U. Brägger, N. P. Lang, M. Zwahlen and G. E. Salvi, Clinical Oral Implants Research, 2007, 18, 63–72.
38
I. K. Karoussis, S. Kotsovilis and I. Fourmousis, Clinical Oral Implants Research, 2007, 18, 669–679.
39
G. A. Van der Weijden, K. M. van Bemmel and S. Renvert, Journal of Clinical Periodontology, 2005, 32, 506–511.
40
M. Esposito, P. Coulthard, R. Oliver, P. Thomsen and H. V. Worthington, in The Cochrane Database of Systematic Reviews, John Wiley & Sons, Ltd, Chichester, UK, 1996.
41
P. Holm-Pedersen, N. P. Lang and F. Müller, Clinical Oral Implants Research, 2007, 18, 15–19.
42
Michael M. Bornstein, N. Cionca and A. Mombelli, Interntional Journal of Oral & Maxillofacial Implants.
43
William Martin, E. Lewis and A. Nicol, International Journal of Oral & Maxillofacial Implants.
44
Lisa J. A. Heitz-Mayfield and G. Huynh-Ba, International Journal of Oral & Maxillofacial Implants.
45
Giovanni E. Salvi and U. Bragger, International Journal of Oral & Maxillofacial Implants.
46
David L. Cochran, S. Schou, L.J.A. Heitz-Mayfield, M.M. Bornstein, G.E. Salvi and W. Martin, International Journal of Oral & Maxillofacial Implants.