Manual closing torque in five implant abutment systems: an in vitro comparative study
| Autor: | Ervin I. Weiss, M. Gross, Ben-Zion Laufer, Dan Kozak |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Dental Implants
Models Anatomic Observer Variation Engineering Analysis of Variance business.industry Dental Abutments Materials testing Structural engineering Dental Prosthesis Design Torque Materials Testing In vitro study Humans Astrophysics::Earth and Planetary Astrophysics Stress Mechanical Oral Surgery business Closing (morphology) Observer variation Abutment (dentistry) Implant abutment |
| Zdroj: | The Journal of prosthetic dentistry. 81(5) |
| ISSN: | 0022-3913 |
| Popis: | A significant percentage of abutment/implant (A/I) assemblies tend to unscrew on functional loading.This in vitro study evaluated the maximum closing torque generated manually for comparison with recommended closing torque values in 5 implant systems.Closing torque generated by 9 operators with 5 manual torque drivers was measured and compared by using a mannequin and torque gauge assembly.Closing torque values were found to be significantly different between operators and between implant systems (P.0001). Mean closing torque values of 9 operators performing 5 closures for 5 systems ranged from 7 to 14.6 N/cm for habitual closures and from 9.4 to 19.9 N/cm for maximum closures.The results demonstrated that maximum manual closure did not approach recommended closing torque in any of the system measured. Significant interoperator and intraoperator variability was found in the closing torque with manual drivers, and the driver diameter and grip were probably an important feature in the generation of high closing torque. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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