Compressive strength differences between hybrid composites using post curing light box with LED and dry heating, in vitro

Abstract

A hybrid type of composite resins is used as dental restorative materials in a wide cavity directly or indirectly. The mechanical properties of the composite resin would increase post-curing. The purpose of this study was to determine the differences between the compressive strength of hybrid type composite resin post-curing using LED light box and dry heating. This type of research was a quasi-experimental in vitro with the sample size of 30 samples which were divided into two groups. Each sample was tested using a Universal Testing Machine (Lloyd) at a speed of 1 mm/minute to test the compressive strength. Compressive strength values were recorded when the sample broke. The average value of compressive strength of the two treatment groups was statistically calculated using t-test. The results, of this study, showed that a hybrid composite resin with post curing using a light box with LED was at 194.138 Mpa which was lower than using the dry heat of 227.339 Mpa. It showed the statistically significant difference. The conclusion of this study was that the compressive strength of post-cured hybrid composites using a light box with LED was significantly lower than the post-curing using dry heat.

Obtaining human teeth for dental education: A cross‐sectional study to create ethical and transparent processes

“…3,4 Research in dentistry carries out numerous in vitro studies to evaluate the physical, chemical, and biological characteristics of various materials and of the dental tissues themselves in order to implement results into dental practice. [5][6][7] With changes in lifestyle and disease patterns, and alternative treatments which result in patients retaining their teeth for longer periods of time, suitable extracted teeth for learning and teaching purposes are being diminished. 8 Substitutes have been created and used to compensate for these difficulties, ranging from animal teeth, especially bovine, to the creation of teeth with artificial materials, such as teeth made from mounted plastics on typodont or models made through three-dimensional printing.…”

“…In dental teaching, human teeth have been used to allow students to experience the anatomy of the root canal system, the natural hardness of healthy and decayed tissues, to learn the basics of cavity preparations, and prosthodontic techniques 3,4 . Research in dentistry carries out numerous in vitro studies to evaluate the physical, chemical, and biological characteristics of various materials and of the dental tissues themselves in order to implement results into dental practice 5–7 …”