Abstract
Statement of problem. Immediate loading of implants may be a predictable treatment alternative when cross-arch
stabilization with a fixed provisional is observed. Purpose. This study investigated the effect of immediate masticatory loading on the stability
of single-standing dental implants with 4 different surfaces. Material and methods. A total of 40 solid screw implants (diameter 3.3 mm, length 8 mm) were placed in
the mandibles of 4 beagle dogs. Test groups included 3 hydroxyapatite (HA) coatings
of titanium plasma-sprayed (TPS) implants. Implants with TPS alone served as control.
Gold crowns were inserted 2 days after implant placement and the dogs were immediately
put on a hard food diet. Implants were followed for 6 months after loading. Clinical
and radiographic assessments of implants were performed at time of crown insertion
(baseline) and after 1, 3, and 6 months of loading. The Periotest instrument was used
for mobility measurements and radiographs were obtained for evaluation of peri-implant
radiolucency and measurement of crestal bone changes. Results. Of 40 implants, 39 displayed no discernible mobility, corresponding to successful
clinical function. Peri-implant radiolucencies were absent for all but the 1 mobile
implant. The reduction in crestal bone levels adjacent to the implants between baseline
and 6 months was statistically significant (P <.0001). No statistically significant differences in crestal bone level changes over
time were found between the various coatings demonstrating the absence of a treatment
effect initiated by the surface coatings. Conclusion. In this study in beagle dogs, immediate masticatory loading of single-standing dental
implants did not jeopardize tissue integration, provided the implants had excellent
primary stability. (J Prosthet Dent 1999;82:428-35.)
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Article info
Footnotes
☆This study was supported by a grant from the ITI Foundation, Waldenburg, Switzerland.
☆☆Reprint requests to: DR H.P. WEBER, DEPARTMENT OF RESTORATIVE DENTISTRY, HARVARD SCHOOL OF DENTAL MEDICINE, 188 LONGWOOD AVE, BOSTON, MA 02115,FAX: (617)432-0901, E-MAIL: [email protected]
★0022-3913/99/$8.00 + 0. 10/1/101564
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Copyright
© 1999 Editorial Council of The Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.
