Makiko Okuzawa-Iwasaki

Institute of Science Tokyo

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Takashi Ono

Tokyo Medical and Dental University

Yuji Ishida

Tokyo Medical and Dental University

Aiko Ishizaki-Terauchi

Tokyo Medical and Dental University

Chiyo Shimizu-Tomoda

Tokyo Medical and Dental University

Jun Aida

Tokyo Medical and Dental University

Shuji Oishi

Shinshu University

Tomonari Matsumura

Tokyo Medical and Dental University

Soma Kita

Tokyo Medical and Dental University

Tomomi Sakaguchi‐Kuma

Tokyo Medical and Dental University

Toshihiro Imamura

Tokyo Medical and Dental University

Cooperative Institutions

Tokyo Medical and Dental University

The University of Tokyo

Institute of Science Tokyo

Shanghai Institute for Science of Science

Tohoku University

American Association of Orthodontists

Tokyo Medical and Dental University Hospital

8020 Promotion Foundation

Tohoku Institute of Technology

Northeastern University

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Relationship Between Laterality of Orthodontic Miniscrew Failure and Clinical Variables

Journal of Clinical Medicine (2024)

Aiko Ishizaki-Terauchi Yuji Ishida Makiko Okuzawa-Iwasaki Chiyo Shimizu-Tomoda Takashi Ono

: Many reports on orthodontic miniscrew insertion focus on insertion conditions, such as technique, but not on the insertion environment, such as the operator's dominant hand. This study aimed to ascertain whether the operator's dominant hand affects laterality in the success rate of manual and motorized miniscrew insertion methods.

10.3390/jcm13237115

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Alveolar bone morphology in patients with a unilateral palatally displaced maxillary lateral incisor: A cone-beam computed tomography study

American Journal of Orthodontics and Dentofacial Orthopedics (2020)

Makiko Okuzawa-Iwasaki Yuji Ishida Yuhei Ikeda Toshihiro Imamura Shuji Oishi

Maxillary lateral incisor

Mandibular lateral incisor

10.1016/j.ajodo.2019.07.011

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Contributions of Alveolar Bone Density and Habitual Chewing Side to the Unilateral Failure of Orthodontic Mini-Screws: A Cross-Sectional Study

Applied Sciences (2024)

Makiko Okuzawa-Iwasaki Yuji Ishida Aiko Ishizaki-Terauchi Chiyo Shimizu-Tomoda Jun Aida

This study aimed to analyze the relationship between bone density, habitual chewing side (HCS), and mini-screw stability to investigate the intra-individual factors contributing to mini-screw failure. This retrospective study included 86 sides in 43 adults, who underwent bilateral maxillary mini-screw placement with subsequent unilateral failure of the mini-screw. Pre-treatment cone-beam computed tomography was used to measure the buccal cortical bone thickness and bone density on the failed and successful sides. Pre-treatment mandibular kinesiographic records were used to determine the HCS. Paired t-tests, one-proportion z-tests, and multivariable multilevel Poisson regression were used to examine the statistical significance. The buccal cortical bone thicknesses were 0.93 ± 0.27 mm (unsuccessful side) and 1.01 ± 0.27 mm (successful side), with no significant difference. The bone density on the unsuccessful side (1059.64 ± 202.64 mg/cm3) was significantly lower than the success side (1317.89 ± 332.23 mg/cm3). Regarding HCS, 27.9% of failures occurred on the preferred side, and 62.8% occurred on the non-preferred side. After adjusting for all factors, the non-preferred side showed a 2.22 times higher prevalence ratio for mini-screw failure than the preferred side. HCS is significantly related to mini-screw stability, while the cortical bone thickness, bone density, and site of mini-screw implantation were not correlated.

Cross-sectional study

10.3390/app14073041

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