Evaluation of Fit in Implant-supported Prostheses Using Measurement of Rotational Angle/Tightening Torque in Screwing
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- Saika Akihiko
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
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- Ichikawa Tetsuo
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
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- Tomotake Yoritoki
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
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- Kanitani Hideo
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
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- Hongama Seiko
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
Bibliographic Information
- Other Title
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- スクリュー締め付け回転角／トルク計測によるインプラント上部構造の適合性評価
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Description
Purpose: Misfit of superstructure-supported osseointegrated implants causes adverse stress in the prosthesis, components, and surrounding bone. A passive fit of the implant-supported prosthesis is essential for successful long-term osseointegration. Various clinical methods for evaluating the fit of implant-supported prostheses have been suggested. However, the methods have little scientific evidence to determine the acceptable fit. The present study evaluated the misfit of implant-supported prostheses by measuring the rotational angle/tightening torque in screwing the prosthesis on master models.<BR>Materials and Methods: Twenty-four implant-supported prostheses (3 single standing, 20 fixed partial, 1 full bridge) of fourteen patients were evaluated using a custom-made rotational angle/ tightening torque measuring apparatus on the master models. The influence of the order of tightening and unit number on the value was also evaluated.<BR>Results: The mean of the rotational angle/tightening torque was 2.6 (SD: 0.6) degree/Ncm in all prostheses. The value was significantly higher than that in the abutment screw as a control. The order of tightening and unit number did not significantly affect the values.<BR>Conclusions: The results suggest that measurements of rotational angle/tightening torque be useful for evaluating the fit of implant-supported prostheses. Misfit of the prostheses was below the level of acceptable fit.
Journal
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- Nihon Hotetsu Shika Gakkai Zasshi
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Nihon Hotetsu Shika Gakkai Zasshi 47 (2), 353-360, 2003
Japan Prosthodontic Society
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Details 詳細情報について
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- CRID
- 1390001204412927616
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- NII Article ID
- 10010529528
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- NII Book ID
- AN00197911
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- ISSN
- 1883177X
- 03895386
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed