Evaluation of Fit in Implant-supported Prostheses Using Measurement of Rotational Angle/Tightening Torque in Screwing
-
- Saika Akihiko
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
-
- Ichikawa Tetsuo
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
-
- Tomotake Yoritoki
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
-
- Kanitani Hideo
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
-
- Hongama Seiko
- Department of Removable Prosthodontics, The University of Tokushima, School of Dentistry
Bibliographic Information
- Other Title
-
- 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
Search this article
Abstract
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
-
- Nihon Hotetsu Shika Gakkai Zasshi
-
Nihon Hotetsu Shika Gakkai Zasshi 47 (2), 353-360, 2003
Japan Prosthodontic Society
- Tweet
Details 詳細情報について
-
- CRID
- 1390001204412927616
-
- NII Article ID
- 10010529528
-
- NII Book ID
- AN00197911
-
- ISSN
- 1883177X
- 03895386
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- Crossref
- CiNii Articles
- KAKEN
-
- Abstract License Flag
- Disallowed