Hf. Morris et al., SUCCESS OF MULTIPLE ENDOSSEOUS DENTAL IMPLANT DESIGNS TO 2ND-STAGE SURGERY ACROSS STUDY SITES, Journal of oral and maxillofacial surgery, 55(12), 1997, pp. 76-82
A multicenter clinical study of dental implants is being conducted by
the Dental Implant Clinical Research Group to investigate the influenc
e of implant design, application, and site on clinical performance and
crestal bone, This article reports on the percentage of success up to
implant uncovering for different implant designs and the distribution
of failures across study sites. Data from 2,847 implants placed at 32
study sites were analyzed, Percentages of success up to implant uncov
ering were calculated for study implants overall, by implant design, b
y implant design within study strata, and according to individual stud
y sites and quartile groupings of sites based on success, Comparisons
were made, with chi-square and exact tests employed where appropriate,
Differences were found between the different implant designs for the
study overall, and between implant designs within the different study
strata, Although some implant designs were found to have generally hig
h success across study sites, some study sites designated as having su
rgeons with less experience tended to have higher failure levels, and
one implant design failed at higher rates in a subset of study sites,
The percentage and distribution of implant failures varied across stud
y sites and by implant design, These differences appeared to be in par
t related to the level of experience of the surgeons, Further investig
ation should focus on identification of factors that contribute to hig
her success in implant placement with different implant designs.