Journal article
Influence of implant angulation and cyclic dislodging on the retentive force of two different overdenture attachments - an in vitro study.
- Srinivasan M Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
- Schimmel M Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
- Badoud I Division of Bone Diseases, Department of Internal Medicine Specialties, University of Geneva, Geneva, Switzerland.
- Ammann P Division of Bone Diseases, Department of Internal Medicine Specialties, University of Geneva, Geneva, Switzerland.
- Herrmann FR Division of Geriatrics, Department of Internal Medicine, Rehabilitation and Geriatrics, University Hospitals of Geneva, Thônex, Switzerland.
- Müller F Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
- 2015-06-19
Published in:
- Clinical oral implants research. - 2016
LOCATOR ®
SFI-Anchor®
artificial saliva
dislodging cycles
implant overdentures
in vitro testing
overdentures
retentive force
Dental Implants
Dental Prosthesis, Implant-Supported
Dental Stress Analysis
Denture Retention
Denture, Overlay
Humans
English
OBJECTIVE
This in vitro study evaluated the influence of implant angulations on the retentive behavior of two overdenture attachments during cyclic dislodging.
METHODS
Models simulating a two-implant overdenture situation were fabricated. They were divided into five groups based on their simulated implant angulations (Groups: 1 = 0°; 2 = 20°; 3 = 30°; 4 = 40°; and 5 = 60°; n = 90). Each group was further divided into two subgroups based on its attachment system (control attachment: LOCATOR(®) ; test attachment: SFI-Anchor(®) ) except for group 5 which had no LOCATOR(®) group. All models underwent 10,000 insertion-removal cycles in a wet environment. Mean retentive forces were recorded. ANOVA and linear regression models were used for statistical analyses, and the level of significance was at P < 0.05.
RESULTS
The ANOVA model revealed an effect of dislodging cycles for both attachments (P = 0.0070). The linear regression model with repeated measures revealed a significant effect of angulation within the LOCATOR(®) groups (0° vs. 20°: P < 0.0001; 0° vs. 30°: P < 0.0001; 0° vs. 40°: P < 0.0001), but was insignificant within the SFI-Anchor(®) groups (0° vs. 20°: P = 0.544; 0° vs. 30°: P = 0.134; 0° vs. 40°: P = 0.254; 0° vs. 60°: P = 0.979). It further revealed a significant increase in the retentive force between the LOCATOR(®) and the SFI-Anchor(®) (20°: P = 0.041; 30°: P < 0.0001; 40°: P < 0.0001), although there was no significant difference between the attachments at 0° (P = 0.623).
CONCLUSIONS
This study confirms that the retentive behavior of SFI-Anchor(®) is not influenced by implant axial inclination even at angulations of up to 60°. The SFI-Anchor(®) may therefore be particularly indicated for clinical situations with marked implant axial discrepancies.
This in vitro study evaluated the influence of implant angulations on the retentive behavior of two overdenture attachments during cyclic dislodging.
METHODS
Models simulating a two-implant overdenture situation were fabricated. They were divided into five groups based on their simulated implant angulations (Groups: 1 = 0°; 2 = 20°; 3 = 30°; 4 = 40°; and 5 = 60°; n = 90). Each group was further divided into two subgroups based on its attachment system (control attachment: LOCATOR(®) ; test attachment: SFI-Anchor(®) ) except for group 5 which had no LOCATOR(®) group. All models underwent 10,000 insertion-removal cycles in a wet environment. Mean retentive forces were recorded. ANOVA and linear regression models were used for statistical analyses, and the level of significance was at P < 0.05.
RESULTS
The ANOVA model revealed an effect of dislodging cycles for both attachments (P = 0.0070). The linear regression model with repeated measures revealed a significant effect of angulation within the LOCATOR(®) groups (0° vs. 20°: P < 0.0001; 0° vs. 30°: P < 0.0001; 0° vs. 40°: P < 0.0001), but was insignificant within the SFI-Anchor(®) groups (0° vs. 20°: P = 0.544; 0° vs. 30°: P = 0.134; 0° vs. 40°: P = 0.254; 0° vs. 60°: P = 0.979). It further revealed a significant increase in the retentive force between the LOCATOR(®) and the SFI-Anchor(®) (20°: P = 0.041; 30°: P < 0.0001; 40°: P < 0.0001), although there was no significant difference between the attachments at 0° (P = 0.623).
CONCLUSIONS
This study confirms that the retentive behavior of SFI-Anchor(®) is not influenced by implant axial inclination even at angulations of up to 60°. The SFI-Anchor(®) may therefore be particularly indicated for clinical situations with marked implant axial discrepancies.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1111/clr.12643
- PMID 26085188
- Persistent URL
- https://folia.unifr.ch/global/documents/14757
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