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?


Int J Oral Maxillofac Implants 26 (2011), No. 4     15. Aug. 2011
Int J Oral Maxillofac Implants 26 (2011), No. 4  (15.08.2011)

Page 816-825, PubMed:21841992

Failure Rates of Short (<= 10 mm) Dental Implants and Factors Influencing Their Failure: A Systematic Review
Sun, Hua Ling / Huang, Cui / Wu, Yan Ru / Shi, Bin
Purpose: The aim of this study was to evaluate the long-term failure rates of short dental implants (<= 10 mm) and to analyze the influence of various factors on implant failure.
Materials and Methods: The PubMed and Cochrane Library databases were consulted for follow-up studies published between the years 1980 and 2009. For those studies that met the inclusion and exclusion criteria, data concerning the number of implants (<= 10 mm) placed and lost and any related risk factors were gathered in tables and subjected to analysis. Univariate and multivariate analyses were performed.
Results: The heterogeneity and low quality of the included studies made meta-analysis impossible. A total of 35 human studies fulfilled the criteria. The studies included 14,722 implants, of which 659 failed. The total failure rate was 4.5%. The failure rates of implants with lengths of 6, 7, 7.5, 8, 8.5, 9, and 10 mm were 4.1%, 5.9%, 0%, 2.5%, 3.2%, 0.6%, and 6.5%, respectively. A majority (57.9%) of failures occurred before prosthesis connection. There was no statistically significant difference between the failure rates of short dental implants and standard implants or between those placed in a single stage and those placed in two stages (multivariate analysis). There was a tendency toward higher failure rates for the maxilla and for dental implants with a machined surface compared with the mandible and dental implants with a rough surface, respectively.
Conclusions: Among the risk factors examined, most failures of short implants can be attributed to poor bone quality in the maxilla and a machined surface. Although short implants in atrophied jaws can achieve similar long-term prognoses as standard dental implants with a reasonable prosthetic design according to this review, stronger evidence is essential to confirm this finding.

Keywords: bone quality, dental implants, implant length, implant position, implant surface