Abstract
Researchers have been investigating the light intensity scattered by a translucent fiber post with application in dentistry by different methods. In this work, we introduce a new system capable to record a light scattered profile, step-by-step, as a function of the length of the translucent fiber post. To support our studies, an extensive characterization of the system was carried out and this is presented and discussed here. The system was implemented using the phase sensitive detection. The equipment measures the light scattered without the need of any preparing parts and the fiber post is fixed directly in the fiber post holder becoming ready for measurement. Measures can be recorded with a spatial resolution smaller than 0.01 mm throughout the length of the fiber post being investigated. The system was implemented by using a photomultiplier tube that improves sensitivity for the optical detection. The recorded result is a signal directly proportional to the scattered light and it allows us to obtain a normalized profile that can be used as a map of the scattered light of the fiber post in study. Furthermore, we are able to demonstrate a low intensity of light in the tip region of the fiber post, along with the dependency of the light attenuation with the fiber post body volume and shape. This new system will certainly contribute to achieve better results in fiber post designing and in restoration of endodontic treated teeth because it provides a more well-founded choice of the fiber post to be used, and of the time of exposure to the curing light.
Highlights
Treated teeth lose part of their structure and the posts are used to provide mechanical support to these teeth, reinforcing their structure
This work presents a new system setup to characterize the light scattered by a translucent fiber posts used in endodontic application
The result presented in the figure 21 is important because it allows investigating different translucent fiber post designs showing the real profile of the scattered light in each case. In this work it was described and characterized a new experimental setup to study the light scattered by a translucent fiber post with dental application
Summary
Treated teeth lose part of their structure and the posts are used to provide mechanical support to these teeth, reinforcing their structure. The light impinges on the top of the post, which is already positioned inside the tooth, and, it is the light scattered on the surface of the post that will photoactivate the cement. These posts must be translucent in order to improve the polymerization throughout the length of the post. Fiber posts, which are formed of fibers compacted in an epoxy-type resin, have been used for dental restorations In this way, it is extremely important to know the way in which fiber posts spread light along their length, and the amount of light scattered along its length.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
