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Force exerted on maxillary anterior teeth in mandibular unilateral and bilateral distal extension partial edentulous situation

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Abstract

The purpose of this study was to determine the influence of mandibular unilateral and bilateral distal extension partial edentulous situation and the use of removable partial dental prostheses on the force exerted on maxillary anterior teeth. A commercially available jaw model with exchangeable teeth was used. Seven experimental conditions of mandibular distal extension edentulous situation were prepared and a distal extension removable partial dental prosthesis to replace missing posterior teeth was fabricated. The occlusal force was measured by inserting an occlusal force measuring film between the maxillary and mandibular teeth of the model. An occlusal load was applied and the forces and ratios were compared using the Kruskal–Wallis test and the Mann–Whitney U test (p < 0.05). As a result, the force exerted on the maxillary anterior teeth increased significantly as the number of remaining teeth decreased in unilateral and bilateral edentulous situation. The force exerted on the maxillary anterior teeth decreased significantly with use of a removable partial dental prosthesis. It is concluded that when the number of remaining teeth decreases in mandibular unilateral and bilateral distal extension partial edentulous situation, the burden on the maxillary anterior teeth increases. Our findings suggest that for patients with mandibular distal extension partial edentulous situation, using a removable partial dental prosthesis is effective in preserving the remaining teeth by reducing excessive force.

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Acknowledgements

The authors wish to thank the staff of the Department of Prosthodontics, Gerodontology, and Oral Rehabilitation, Osaka University Graduate School of Dentistry. We also thank Helen Jeays, BDSc AE, from Edanz Group (https://en-author-services.edanz.com/ac) for editing a draft of this manuscript. This work was supported by Grant-in-Aid for Scientific Research No. 25462993 from the Japan Society for the Promotion of Science.

Funding

Funding was provided by the Japan Society for the Promotion of Science, Grant no: 25462993.

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Authors and Affiliations

  1. Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka Suita, Osaka, 565-0871, Japan

    Hitomi Togawa, Tomoya Gonda, Takeshi Karino, Yoshinobu Maeda, Takahiro Ono & Kazunori Ikebe

  2. Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, 2-Bancho, Gakkocho-Dori, Chuo-Ku, Niigata, 5274951-8514, Japan

    Hitomi Togawa & Takahiro Ono

Authors
  1. Hitomi Togawa
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  2. Tomoya Gonda
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  3. Takeshi Karino
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  4. Yoshinobu Maeda
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  5. Takahiro Ono
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  6. Kazunori Ikebe
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by HT, TG and TK. The first draft of the manuscript was written by HT and TG and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Tomoya Gonda.

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Togawa, H., Gonda, T., Karino, T. et al. Force exerted on maxillary anterior teeth in mandibular unilateral and bilateral distal extension partial edentulous situation. Odontology 111, 451–460 (2023). https://doi.org/10.1007/s10266-022-00760-2

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  • DOI: https://doi.org/10.1007/s10266-022-00760-2

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