Relationship between the bone density estimated by cone-beam computed tomography and the primary stability of dental implants

  1. Kei Isoda1,
  2. Yasunori Ayukawa1,
  3. Yoshihiro Tsukiyama1,
  4. Motofumi Sogo2,
  5. Yasuyuki Matsushita1,
  6. Kiyoshi Koyano1

Article first published online: 5 MAY 2011

DOI: 10.1111/j.1600-0501.2011.02203.x

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How to Cite

Isoda, K., Ayukawa, Y., Tsukiyama, Y., Sogo, M., Matsushita, Y. and Koyano, K. (2011), Relationship between the bone density estimated by cone-beam computed tomography and the primary stability of dental implants. Clinical Oral Implants Research. doi: 10.1111/j.1600-0501.2011.02203.x

Author Information

  1. 1

    Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan

  2. 2

    Department of Prosthodontics and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan

*Corresponding author: Kei Isoda, DDS, PhD Section of Implant and Rehabilitative Dentistry Division of Oral Rehabilitation Faculty of Dental Science Kyushu University 3-1-1 Maidashi Higashi-ku Fukuoka 812-8582 Japan Tel.:+81 92 642 6441 Fax:+81 92 642 6380 e-mail: k-isoda@dent.kyushu-u.ac.jp

Publication History

  1. Article first published online: 5 MAY 2011
  2. Date: , Accepted 14 March 2011

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Keywords:

  • bone density;
  • cone-beam computed tomography;
  • dental implants;
  • insertion torque;
  • primary stability;
  • resonance frequency analysis

Abstract

Objectives: The aims of this study were to objectively assess bone quality with density values obtained by cone-beam computed tomography (CBCT) and to determine the correlations between bone density and primary stability of dental implants.

Material and methods: Eighteen Straumann implants were inserted into 18 fresh femoral heads of swine. The bone densities of implant recipient sites were preoperatively determined by the density value using CBCT. The maximum insertion torque value of each implant was recorded using a digital torque meter. Resonance frequency, which represented a quantitative unit called the implant stability quotient (ISQ), was measured using an Osstell® Mentor immediately after the implant placement. Spearman's correlation coefficient was calculated to evaluate the correlations among density values, insertion torques, and ISQs at implant placement.

Results: The density values ranged from 98 to 902. The mean density value, insertion torque, and ISQ were 591±226, 13.4±5.2 Ncm, and 67.1±8.1, respectively. Statistically significant correlations were found between the density values and insertion torque (rs=0.796, P<0.001), density values and ISQ (rs=0.529, P=0.024), and insertion torque and ISQ (rs=0.758, P<0.001).

Conclusions: The bone quality evaluated by specific CBCT showed a high correlation with the primary stability of the implants. Hence, preoperative density value estimations by CBCT may allow clinicians to predict implant stability. Whether the density values obtained by the CBCT device used in the present study could be applied to other devices requires further elucidation.

To cite this article: Isoda K, Ayukawa Y, Tsukiyama Y, Sogo M, Matsushita Y, Koyano K. Relationship between the bone density estimated by cone-beam computed tomography and the primary stability of dental implants. Clin. Oral Impl. Res. xx, 2011; 000–000 doi: 10.1111/j.1600-0501.2011.02203.x

View Full Article (HTML) Get PDF (394K)