We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
The International Journal of Oral & Maxillofacial Implants



Forgotten password?


Dear readers,

our online journals are moving. The new (and old) issues of all journals can be found at
In most cases you can log in there directly with your e-mail address and your current password. Otherwise we ask you to register again. Thank you very much.

Your Quintessence Publishing House
Int J Oral Maxillofac Implants 31 (2016), No. 5     19. Sep. 2016
Int J Oral Maxillofac Implants 31 (2016), No. 5  (19.09.2016)

Page 1156-1163, doi:10.11607/jomi.4336, PubMed:27632273

The Influence of Crown-to-Implant Ratio on Short Implant Marginal Bone Loss
Nunes, Mariana / Almeida, Ricardo Faria / Felino, Antonio Campos / Malo, Paulo / Nobre, Miguel de Araújo
Purpose: There is a need for more studies evaluating the marginal bone loss (MBL) of rehabilitations in the posterior regions of extremely resorbed maxillae and mandibles supported by short-length dental implants with a high crown/implant ratio (C/I-R). The aim of this study was to evaluate the influence of the C/I-R in implants on MBL considering dental implants with 4 mm of width and 7 mm of length.
Materials and Methods: This retrospective cohort study included 59 patients (mean age of 52.8 years) rehabilitated with at least one implant 4 mm in width and 7 mm in length, with an anodically oxidized surface and external connection on the premolar or molar positions, supporting a fixed prosthesis, and in function for a period of 36 months. Periapical radiographs at 36 months were used to calculate the C/I-R and MBL. The Spearman correlation coefficient was used to test the correlation between C/I-R and MBL. The level of significance was set at 5%.
Results: One hundred eighteen implants from 59 patients were evaluated. The mean ± SD MBL was 0.67 ± 0.63 mm. The C/I-R mean ± SD was 2.53 ± 0.79 mm. Thirty implants presented a C/I-R ≤ 2, while 88 implants had a C/I-R > 2. A weak nonsignificant inverse correlation (r = -0.081; P = .383, Spearman) was registered between C/I-R and MBL.
Conclusion: Within the limitations of this study, it is possible to conclude that implant-supported fixed prostheses with C/I-R > 2 do not correlate positively with MBL.

Keywords: crown-to-implant ratio, marginal bone loss, short implant
fulltext (no access granted) Endnote-Export