Clinical and histological evaluation of immediate-loaded posterior implants in nonhuman primates

Jon B. Suzuki, Carl E. Misch, Mohamed Sharawy, Oscar J. Sarnachiaro, Guido O. Sarnachian, Luis Mota, Gabriel Arana, Sergio L. Gotta, Evangeline Gotta, Lynna Bui

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

PURPOSE:: To evaluate a square-thread design implant and compare the bone-implant contact percentage between immediate-loaded and nonloaded implants (controls) in nonhuman primates. MATERIALS:: Five nonhuman primates each received 3 implants, with a total of 5 control implants and 10 immediate-loaded implants in posterior regions of the mouth. Ninety days after surgery (and function was appropriate), block sections of the implants were removed and sectioned in 200-1/4m thick pieces. The block sections were stained with modified Masson for evaluation of the bone-implant contact percentage. RESULTS:: One of the immediate-loaded implants failed. The bone-implant contact percentage of control implants ranged from 50.34% to 64.13% and averaged 56.3%. The bone-implant contact percentage of immediate-loaded implants ranged from 43.23% to 75.72%, with an average of 62.4%. Two implants had lower bone-implant contact percentage than the others, and when these are not included in the evaluation, the bone-implant contact percentage average increased to 67.6%. CONCLUSIONS:: Immediate-loaded implants in the nonhuman primates often have a higher bone-implant contact percentage at 90 days than unloaded implants. The bone remodeling is different for loaded implant-bone interfaces than for unloaded conditions. However, 1 immediate-loaded implant failed, and 2 implants had lower bone-implant contact percentage than controls. Therefore, although there are benefits of immediate loading, there appear to also be some risks.

Original languageEnglish (US)
Pages (from-to)176-186
Number of pages11
JournalImplant Dentistry
Volume16
Issue number2
DOIs
StatePublished - Jun 1 2007

Keywords

  • Animal study
  • Endosteal implants
  • Immediate load

ASJC Scopus subject areas

  • Oral Surgery

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    Suzuki, J. B., Misch, C. E., Sharawy, M., Sarnachiaro, O. J., Sarnachian, G. O., Mota, L., Arana, G., Gotta, S. L., Gotta, E., & Bui, L. (2007). Clinical and histological evaluation of immediate-loaded posterior implants in nonhuman primates. Implant Dentistry, 16(2), 176-186. https://doi.org/10.1097/ID.0b013e3180500a84