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Open AccessArticle

Evaluation of Implants with Different Macrostructures in Type I Bone—Pre-Clinical Study in Rabbits

1
Department of Diagnosis and Surgery, School of Dentistry at Araraquara, Sao Paulo State University (UNESP), Araraquara 14801-385, Brazil
2
Post Graduation Course in Implantology, Latin American Institute of Dental Research (ILAPEO), Curitiba 80710-150, Brazil
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Department of Periodontology, School of Dentistry at Uberlândia, Federal University of Uberlândia, Uberlândia 38408-160, Brazil
4
Post Graduation Course in Odontology, University of Araraquara/UNIARA, Araraquara 14801-320, Brazil
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(7), 1521; https://doi.org/10.3390/ma13071521
Received: 23 February 2020 / Revised: 13 March 2020 / Accepted: 22 March 2020 / Published: 26 March 2020
The objective of this study was to assess the primary stability and the osseointegration process in implants with different macrostructures (Cylindrical vs. Hybrid Conical) in rabbit tibiae. Twenty-four (24) rabbits were used, divided into 3 experimental periods (2, 4 and 8 weeks) with 8 animals each. Each animal bilaterally received 2 implants from each group in the tibial metaphysis: Cylindrical Implant (CI) and Hybrid Conical Implant (HCI). All implants were assessed for insertion torque. After the experimental periods, one of the implants in each group was submitted to the removal counter-torque test and descriptive histological analysis while the other implant was used for microtomographic and histometric analysis (%Bone-Implant Contact). HCI implants showed higher insertion torque (32.93 ± 10.61 Ncm vs. 27.99 ± 7.80 Ncm) and higher % of bone-implant contact in the 8-week period (79.08 ± 11.31% vs. 59.72 ± 11.29%) than CI implants. However, CI implants showed higher values of removal counter-torque than HCI implants in the 8-week period (91.05 ± 9.32 Ncm vs. 68.62 ± 13.70 Ncm). There were no differences between groups regarding microtomographic data. It can be concluded that HCI implants showed greater insertion torque and bone-implant contact in relation to CI implants in the period of 8 weeks when installed in cortical bone of rabbits. View Full-Text
Keywords: dental implants; macrostructure; osseointegration dental implants; macrostructure; osseointegration
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de Carvalho Silva Leocádio, A.; Silva Júnior, M.; José Pimentel Lopes de Oliveira, G.; da Col Santos Pinto, G.; Silveira Faeda, R.; Marques Padovan, L.E.; Marcantonio Júnior, É. Evaluation of Implants with Different Macrostructures in Type I Bone—Pre-Clinical Study in Rabbits. Materials 2020, 13, 1521.

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