Define mechanism of rotary instrument fracture, Biology

Assignment Help:

Define Mechanism of Rotary Instrument Fracture - Cyclic Fatigue

Occurs unexpectedly and without any visible signs of plastic deformation o An instrument rotating freely in a curved canal is subjected to compression and elongation (tension) simultaneously, resulting in work hardening and metal fatigue lead to fracture

NOTE: During manufacture the machine of grinding can cause minute crack that is not visible to the eye... but I can see it under the microscope. This crack when insert it into curved canal but not tight canal .. with rotation movement there is repeated compression and tension eventually well lead to fracture of the file .. even if the file is new ( 1st use)

 


Related Discussions:- Define mechanism of rotary instrument fracture

Syngamy - patterns of sexual reproduction, Syngamy - Patterns of Sexual Rep...

Syngamy - Patterns of Sexual Reproduction Sperm fuses with the egg. This results in both the union of the paternal nucleus with the maternal one (karyogamy), as well as the fu

Enumerate about the minerals and rocks, Minerals and Rocks      A mine...

Minerals and Rocks      A mineral is an inorganic body, formed by the process of nature, usually having a definite composition. If formed under favourable conditions, it has a

Why fish and sea foods are important for human body, Why Fish and Sea Foods...

Why Fish and Sea Foods are important for human Body? They are rich sources of proteins (20-25%) of a high biological value. Dry fishes contain more (60%) proteins since most of

Physiological regeneration, Physiological Regeneration This type of r...

Physiological Regeneration This type of regeneration is a regular physiological function including the continuous replacements of cells and tissues, and thus is indispensible

What are biopolymers, What are biopolymers? Polymers are macromolecule...

What are biopolymers? Polymers are macromolecules made by the union of various smaller identical molecules, called monomers. Biopolymers are polymers present in the living bei

What are meninges and cerebrospinal fluid, What are meninges and cerebrospi...

What are meninges and cerebrospinal fluid? Meninges are the membranes that enclose and protect the central nervous system (CNS). Cerebrospinal fluid is the fluid that separates

Lysosomes, LYSOSOMES Like mitochondrial lysosomes are also  typical mem...

LYSOSOMES Like mitochondrial lysosomes are also  typical membrane bound and dense  fluid filled sac  like cytoplasmic  organelles  of all eukaryotic cells these  however, diffe

Cause the inhibition of apoptosis, We now understand that mutations that ca...

We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how

Cultural and religious values, Wildlife has influenced language, art, relig...

Wildlife has influenced language, art, religion and social customs of many societies worldwide, and wild animals figure prominently in many cultures even today. In all cultures of

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd