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

What are the types of colloidal dispersions, What are the types of colloida...

What are the types of colloidal dispersions Depending upon the relative affinity of the dispersed phase for the dispersion medium, colloidal dispersions are, further divided in

Two-kingdom classification, Two-Kingdom Classification The history of ...

Two-Kingdom Classification The history of taxonomy is as old as man himself. It may be traced back to prehistoric times because man had learnt to designate living organisms by

Illustrate dark reactions, Q. Why is the nickname "dark reactions" not comp...

Q. Why is the nickname "dark reactions" not completely correct for the chemical stage of photosynthesis? "Dark reactions" is not a correct name for the chemical phase of photos

What do you mean by hemodialysis, Q. What do you mean by hemodialysis? ...

Q. What do you mean by hemodialysis? Hemodialysis is the artificial blood filtration made by specific machines in alternative of the kidneys. Hemodialysis may be necessary in p

Types of ecosystem, Ecosystems are so varied in form and structure that wha...

Ecosystems are so varied in form and structure that whatever has a distinct community of its own, can be called an ecosystem eg. A crop field, grass land, barks etc. all the ecosys

Nutrition, The oxidation of sugar in the cell of higher organisms takes pla...

The oxidation of sugar in the cell of higher organisms takes place in the where

Intermediate products of anaerobic respiration, (a) What are the intermedia...

(a) What are the intermediate products of anaerobic respiration in an active muscle? (b) Which of them is associated with oxygen debt? (c) In what way is th

Phototherapy, Phototherapy As you know exposure of the jaundiced infa...

Phototherapy As you know exposure of the jaundiced infant to blue, white or green light is effective in reducing the serum billirubin level. When bilirubin absorbs light, ser

Compute the diffusion coefficient of a protein, Calculate the diffusion coe...

Calculate the diffusion coefficient of a protein bovine serum albumin at 23 degree Celsius?

Rate of transport with increasing solute, Based on the information given in...

Based on the information given in each description, determine if the transporter is likely a channel or a carrier. This transporter shows increasing rate of transport with increasi

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