First generation filler used in dental composite resin was:
Correct Answer: Inorganic quartz
Description: Various transparent mineral fillers are employed to strengthen and reinforce composites as well as to reduce curing shrinkage and thermal expansion (generally between 30% to 70% by volume or 50% to 85% by weight of a composite). These include the so-called “soft glass” and borosilicate “hard glass”, fused quartz, aluminum silicate, lithium aluminum silicate (beta-eucryptite, which has a negative coefficient of thermal expansion), ytterbium fluoride, and barium (Ba), strontium (Sr), zirconium (Zr), and zinc glasses. The latter five types of fillers impart radiopacity because of their heavy metal atoms. Quartz had been used extensively as a filler in the early versions of dental composites.
Inorganic quartz was one of the first materials to be used and is often considered as first-generation filler.
Phillips Science of Dental Materials ed 12 pg 280
Category:
Dental
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now