Volume 22, Issue 2 pp. 157-164

The effect of water pyrolysis on the removal torque of titanium implant inserted in rabbit tibias

Park Se-Ho

Park Se-Ho

Department of Prosthodontics, College of Dentistry, Kyungpook National University, Daegu, South Korea

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Song Won Bin

Song Won Bin

Department of Prosthodontics, College of Dentistry, Kyungpook National University, Daegu, South Korea

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Kim Kun Ho

Kim Kun Ho

Department of Physics, College of Natural Science, Gyeongsang National University, Jinju, South Korea

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Soe Dong Ju

Soe Dong Ju

Department of Physics Education, College of Education, Chosun University, Gwangju, South Korea

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Cho Sung-Am

Cho Sung-Am

Department of Prosthodontics, College of Dentistry, Kyungpook National University, Daegu, South Korea

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First published: 11 January 2011
Corresponding authors:
Cho Sung-Am
Department of Prosthodontic
College of Dentistry
Kyungpook National University
188-1 Samduck 2-Ga
Daegu 700-412
South Korea
Tel.: +82 53 422 6128
Fax: +82 53 421 6898
e-mails: [email protected], [email protected]
Kim Kun Ho
Department of Physics
College of Natural Science
Gyeongsang National University
900 Gazwa-dong
Jinju 660-701
South Korea
Tel.: +82 55 751 5930
Fax: +82 53 753 1334
e-mail: [email protected]

Abstract

Objective: The aim of this study is to examine the effect of oxidation with water pyrolysis (OWP) method on titanium (Ti) implants by comparing the bonding strength between bone and Ti implants that were inserted in the proximal tibia metaphysic of a rabbit for 12 weeks. The removal torque was measured to evaluate the bonding strength for different Ti implants with and without the OWP method.

Material and methods: Nine sets of threaded Ti implants (ASTM grade 2) of diameter 3.75 mm and length 5 mm were prepared for the experiment. Each set was composed of four specimens; one was machine-prepared (group D) and the other three were threaded followed by the OWP method at 300°C (group A), 600°C (group B), and 800°C (group C) for 10 min, respectively. Each set was used for each adult rabbit. To eliminate the effect of the sites or the legs, each rabbit received all four implants, two in the left and two in the right leg, inserted in the proximal tibia metaphyses of the left leg, using a fixed block randomization. After 12 weeks, removal torque tests were carried out.

Results: The mean removal torque for the control group D was 16.19 N cm, while the mean removal torque values for the OWP groups A, B, and C were 26.75, 31.51, and 41.05 N cm, respectively. The removal torques obtained from the OWP groups B and C (showing the rutile oxide structure) were significantly greater than that for the control group by Bonferroni's-corrected Wilcoxon's signed-rank test (P<0.05).

Conclusion: The strongest bonding between bone and group C (OWP method at 800°C) was confirmed by the comparison of removal torques.

To cite this article:
S-H Park, WB Song, KH Kim, DJ Soe, S-A Cho. The effect of water pyrolysis on the removal torque of titanium implant inserted in rabbit tibias.
Clin. Oral Impl. Res. 22, 2011; 157–164.
doi: 10.1111/j.1600-0501.2010.01971.x

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