Dentaltown February 2018 - 43
a broken lower incisor after I finished working on #18. Please provide us with an X-ray. Sorry
about your bad luck! It could have been worse. What if it had injured the eye? ■
11/18/2017
First and foremost. You are doing the right thing for your patient. Bravo.
Back in the day, high speed was friction grip, low speed was latch style. Times have changed,
burs and diamonds have changed with them.
The diameter of the bur or diamond is really important when we spin it at really high rpm.
Do not use large diameter burs and diamonds at high rpm. I promise it will bite your backside
sooner, not later. I will bet a dollar for a doughnut that there is an rpm limit for that big barrel
shaped diamond. That limit is not 200,000rpm. Probably 40,000rpm or 50,000rpm. I have not
taken the time to look it up, I can tell by the pic it is too damn big for high rpm.
Electric handpieces are great. It's also great that with the right electric motor you can go all
friction grip for all your burs and diamonds. Makes inventory simpler, latch burs will someday
be an anachronism. Way back when we needed that D-shaped shaft to keep the chuck from
slipping under high load. That is no longer the case.
Technology and metallurgy have made it possible for a friction grip chuck to "do it all" with
regard to high load.
You the clinician have to be aware of the rpm limits for the instruments employed. The
control for your electric will allow you to set a maximum rpm. You must use the control for the
electric motor to set an rpm limit for the bur or diamond in use.
Do not count on your foot on the rheostat to limit the rpm. It takes a blink of an eye to
cause the bur or diamond to fly apart. And yes, that sucker is hauling ass when it breaks off the
shaft. Be glad it hit a tooth, far preferable to a hole in the patient's cheek. After all it did fracture
a tooth. ■
ricklin
Member Since: 08/19/04
Post: 42 of 127
11/18/2017
Others are saying, "Happens every week" and "I have had hundreds of burs break."
I have had three surgical burs break on me in 25 years and they were all in 1994-1995
when I bought some cheap ones. I might have had another 10 operative burs break and all when
cutting off a crown or sectioning a bridge.
I can't wrap my mind around these other posts about burs breaking all the time
Some of you who have burs breaking all the time, can you enlighten me on how? What are
you doing that causes them to break all the time? ■
drtommymurph
Member Since: 04/05/02
Post: 53 of 127
11/19/2017
F=MA. Wonder if the core is aluminum or steel (which is denser). We could figure the
velocity (and there fore, the force) if we know the weight of the fragment as well as the angular
velocity (simple physics). Finally, a real-world use for physics mechanics. An Excel spread sheet
would be kind of fun.
But a bur head that size compared to a 557 fragment? I bet the force varies exponentially. ■
alanrw
Member Since: 05/16/11
Post: 55 of 127
11/19/2017
It's pretty easy for a diamond to be slightly out of balance, it's the way they are made. The
large diameter instruments must be used at limited rpm.
It's not a manufacturer issue per se, it's those pesky physics. Even the highest quality burs
or diamonds will do the same thing if used above their rpm limits. The cheapo imports will be
more likely to fail. Anything that goes in the mouth should not come from offshore suppliers. In
ricklin
Member Since: 08/19/04
Posts: 56 and 60 of 127
dentaltown.com \\ FEBRUARY 2018
43
http://www.dentaltown.com
Table of Contents for the Digital Edition of Dentaltown February 2018
Dentaltown February 2018 - Intro
Dentaltown February 2018 - Cover1
Dentaltown February 2018 - Cover2
Dentaltown February 2018 - 1
Dentaltown February 2018 - 2
Dentaltown February 2018 - 3
Dentaltown February 2018 - 4
Dentaltown February 2018 - 5
Dentaltown February 2018 - 6
Dentaltown February 2018 - 7
Dentaltown February 2018 - 8
Dentaltown February 2018 - 9
Dentaltown February 2018 - 10
Dentaltown February 2018 - 11
Dentaltown February 2018 - 12
Dentaltown February 2018 - 13
Dentaltown February 2018 - 14
Dentaltown February 2018 - 15
Dentaltown February 2018 - 16
Dentaltown February 2018 - 17
Dentaltown February 2018 - 18
Dentaltown February 2018 - 19
Dentaltown February 2018 - 20
Dentaltown February 2018 - 21
Dentaltown February 2018 - 22
Dentaltown February 2018 - 23
Dentaltown February 2018 - 24
Dentaltown February 2018 - 25
Dentaltown February 2018 - 26
Dentaltown February 2018 - 27
Dentaltown February 2018 - 28
Dentaltown February 2018 - 29
Dentaltown February 2018 - 30
Dentaltown February 2018 - 31
Dentaltown February 2018 - 32
Dentaltown February 2018 - 33
Dentaltown February 2018 - 34
Dentaltown February 2018 - 35
Dentaltown February 2018 - 36
Dentaltown February 2018 - 37
Dentaltown February 2018 - 38
Dentaltown February 2018 - 39
Dentaltown February 2018 - 40
Dentaltown February 2018 - 41
Dentaltown February 2018 - 42
Dentaltown February 2018 - 43
Dentaltown February 2018 - 44
Dentaltown February 2018 - 45
Dentaltown February 2018 - 46
Dentaltown February 2018 - 47
Dentaltown February 2018 - 48
Dentaltown February 2018 - 49
Dentaltown February 2018 - 50
Dentaltown February 2018 - 51
Dentaltown February 2018 - 52
Dentaltown February 2018 - 53
Dentaltown February 2018 - 54
Dentaltown February 2018 - 55
Dentaltown February 2018 - 56
Dentaltown February 2018 - 57
Dentaltown February 2018 - 58
Dentaltown February 2018 - 59
Dentaltown February 2018 - 60
Dentaltown February 2018 - 61
Dentaltown February 2018 - 62
Dentaltown February 2018 - 63
Dentaltown February 2018 - 64
Dentaltown February 2018 - 65
Dentaltown February 2018 - 66
Dentaltown February 2018 - 67
Dentaltown February 2018 - 68
Dentaltown February 2018 - 69
Dentaltown February 2018 - 70
Dentaltown February 2018 - 71
Dentaltown February 2018 - 72
Dentaltown February 2018 - 73
Dentaltown February 2018 - 74
Dentaltown February 2018 - 75
Dentaltown February 2018 - 76
Dentaltown February 2018 - 77
Dentaltown February 2018 - 78
Dentaltown February 2018 - 79
Dentaltown February 2018 - 80
Dentaltown February 2018 - 81
Dentaltown February 2018 - 82
Dentaltown February 2018 - 83
Dentaltown February 2018 - 84
Dentaltown February 2018 - 85
Dentaltown February 2018 - 86
Dentaltown February 2018 - 87
Dentaltown February 2018 - 88
Dentaltown February 2018 - 89
Dentaltown February 2018 - 90
Dentaltown February 2018 - 91
Dentaltown February 2018 - 92
Dentaltown February 2018 - 93
Dentaltown February 2018 - 94
Dentaltown February 2018 - 95
Dentaltown February 2018 - 96
Dentaltown February 2018 - 97
Dentaltown February 2018 - 98
Dentaltown February 2018 - 99
Dentaltown February 2018 - 100
Dentaltown February 2018 - 101
Dentaltown February 2018 - 102
Dentaltown February 2018 - 103
Dentaltown February 2018 - 104
Dentaltown February 2018 - Cover3
Dentaltown February 2018 - Cover4
https://www.nxtbook.com/farran/dentaltown/dentaltown-november-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-october-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-september-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-august-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-july-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-june-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-may-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-april-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-march-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-february-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-january-2024
https://www.nxtbook.com/farran/dentaltown/dentaltown-december-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-november-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-new-grad-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-october-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-september-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-august-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-july-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-june-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-may-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-april-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-march-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-february-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-january-2023
https://www.nxtbook.com/farran/dentaltown/dentaltown-december-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-november-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-october-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-new-grad-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-september-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-august-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-july-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-june-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-may-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-april-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-march-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-february-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-january-2022
https://www.nxtbook.com/farran/dentaltown/dentaltown-december-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-november-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-new-grad-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-october-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-september-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-august-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-july-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-june-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-may-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-april-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-march-2021
https://www.nxtbook.com/farran/dentaltown/dentaltown-february-2021
https://www.nxtbook.com/farran/dentaltown/2021January
https://www.nxtbook.com/farran/dentaltown/2020December
https://www.nxtbook.com/farran/dentaltown/2020November
https://www.nxtbook.com/farran/dentaltown/2020NewGrad
https://www.nxtbook.com/farran/dentaltown/2020October
https://www.nxtbook.com/farran/dentaltown/2020September
https://www.nxtbook.com/farran/dentaltown/2020August
https://www.nxtbook.com/farran/dentaltown/2020July
https://www.nxtbook.com/farran/dentaltown/2020June
https://www.nxtbook.com/farran/dentaltown/2020May
https://www.nxtbook.com/farran/dentaltown/2020April
https://www.nxtbook.com/farran/dentaltown/2020March
https://www.nxtbook.com/farran/dentaltown/2020February
https://www.nxtbook.com/farran/dentaltown/2020January
https://www.nxtbook.com/farran/dentaltown/2019December
https://www.nxtbook.com/farran/dentaltown/2019November
https://www.nxtbook.com/farran/dentaltownuk/2019OctoberNovember
https://www.nxtbook.com/farran/dentaltown/2019October
https://www.nxtbook.com/farran/dentaltown/2019NewGrad
https://www.nxtbook.com/farran/dentaltown/2019September
https://www.nxtbook.com/farran/dentaltown/2019August
https://www.nxtbook.com/farran/dentaltown/2019July
https://www.nxtbook.com/farran/dentaltownuk/2019JuneJuly
https://www.nxtbook.com/farran/dentaltown/2019June
https://www.nxtbook.com/farran/dentaltown/2019May
https://www.nxtbook.com/farran/dentaltownuk/2019AprilMay
https://www.nxtbook.com/farran/dentaltown/2019April
https://www.nxtbook.com/farran/dentaltown/2019March
https://www.nxtbook.com/farran/dentaltown/2019February
https://www.nxtbook.com/farran/dentaltownuk/2019FebruaryMarch
https://www.nxtbook.com/farran/dentaltown/2019January
https://www.nxtbook.com/farran/dentaltownuk/2018Winter
https://www.nxtbook.com/farran/dentaltown/2018December
https://www.nxtbook.com/farran/dentaltown/2018November
https://www.nxtbook.com/farran/dentaltownuk/2018November
https://www.nxtbook.com/farran/dentaltown/2018October
https://www.nxtbook.com/farran/dentaltownuk/2018October
https://www.nxtbook.com/farran/dentaltown/2018NewGrad
https://www.nxtbook.com/farran/dentaltown/2018September
https://www.nxtbook.com/farran/dentaltownuk/2018September
https://www.nxtbook.com/farran/dentaltown/2018August
https://www.nxtbook.com/farran/dentaltownuk/2018July
https://www.nxtbook.com/farran/dentaltown/2018July
https://www.nxtbook.com/farran/dentaltownuk/2018June
https://www.nxtbook.com/farran/dentaltown/2018June
https://www.nxtbook.com/farran/dentaltownuk/2018May
https://www.nxtbook.com/farran/dentaltown/2018May
https://www.nxtbook.com/farran/dentaltownuk/2018April
https://www.nxtbook.com/farran/dentaltown/2018April
https://www.nxtbook.com/farran/dentaltown/2018March
https://www.nxtbook.com/farran/dentaltownuk/2018March
https://www.nxtbook.com/farran/dentaltown/2018February
https://www.nxtbook.com/farran/dentaltownuk/2018February
https://www.nxtbook.com/farran/dentaltown/2018January
https://www.nxtbook.com/farran/dentaltown/2017December
https://www.nxtbook.com/farran/dentaltownuk/2017Winter
https://www.nxtbook.com/farran/dentaltown/2017November
https://www.nxtbook.com/farran/dentaltown/2017October
https://www.nxtbook.com/farran/dentaltownuk/2017october
https://www.nxtbook.com/farran/dentaltown/NewGrad2017
https://www.nxtbook.com/farran/dentaltown/2017September
https://www.nxtbook.com/farran/dentaltownuk/2017September
https://www.nxtbook.com/farran/dentaltownuk/2017August
https://www.nxtbook.com/farran/dentaltown/2017August
https://www.nxtbook.com/farran/dentaltown/2017July
https://www.nxtbook.com/farran/dentaltownuk/2017July
https://www.nxtbook.com/farran/dentaltown/2017June
https://www.nxtbook.com/farran/dentaltownuk/2017may
https://www.nxtbook.com/farran/dentaltown/2017May
https://www.nxtbook.com/farran/dentaltownuk/2017April
https://www.nxtbook.com/farran/dentaltown/2017April
https://www.nxtbook.com/farran/dentaltown/2017March
https://www.nxtbook.com/farran/dentaltownuk/dentaltownuk/2017march
https://www.nxtbook.com/farran/dentaltown/February2017
https://www.nxtbook.com/farran/dentaltown/2017January
https://www.nxtbook.com/farran/dentaltown/2016December
https://www.nxtbook.com/farran/dentaltown/2016November
https://www.nxtbook.com/farran/dentaltown/2016October
https://www.nxtbook.com/farran/dentaltown/2016nge
https://www.nxtbook.com/farran/dentaltown/2016september
https://www.nxtbook.com/farran/dentaltown/2016august
https://www.nxtbook.com/farran/dentaltown/2016july
https://www.nxtbook.com/farran/dentaltown/2016june
https://www.nxtbook.com/farran/dentaltown/2016may
https://www.nxtbook.com/farran/dentaltown/2016april
https://www.nxtbook.com/farran/dentaltown/2016march
https://www.nxtbook.com/farran/dentaltown/2016february
https://www.nxtbook.com/farran/dentaltown/2016january
https://www.nxtbook.com/farran/dentaltown/2015december
https://www.nxtbook.com/farran/dentaltown/2015november
https://www.nxtbook.com/farran/dentaltown/2015october
https://www.nxtbook.com/farran/dentaltown/2015nge
https://www.nxtbook.com/farran/dentaltown/2015september
https://www.nxtbook.com/farran/dentaltown/2015august
https://www.nxtbook.com/farran/dentaltown/2015july
https://www.nxtbook.com/farran/dentaltown/2015june
https://www.nxtbook.com/farran/dentaltown/2015may
https://www.nxtbook.com/farran/dentaltown/2015april
https://www.nxtbook.com/farran/dentaltown/2015march
https://www.nxtbook.com/farran/dentaltown/2015february
https://www.nxtbook.com/farran/dentaltown/2015january
https://www.nxtbook.com/farran/dentaltown/2014december
https://www.nxtbook.com/farran/dentaltown/2014decemberb
https://www.nxtbook.com/farran/dentaltown/2014november
https://www.nxtbook.com/farran/dentaltown/2014october
https://www.nxtbook.com/farran/dentaltown/2014newgrad
https://www.nxtbook.com/farran/dentaltown/2014september
https://www.nxtbook.com/farran/dentaltown/2014august
https://www.nxtbook.com/farran/dentaltown/2014july
https://www.nxtbook.com/farran/dentaltown/2014june
https://www.nxtbook.com/farran/dentaltown/2014may
https://www.nxtbook.com/farran/dentaltown/2014april
https://www.nxtbook.com/farran/dentaltown/2014march
https://www.nxtbook.com/farran/dentaltown/2014february
https://www.nxtbook.com/farran/dentaltown/2014january
https://www.nxtbook.com/farran/dentaltown/2013december
https://www.nxtbook.com/farran/dentaltown/2013november
https://www.nxtbook.com/farran/dentaltown/2013october
https://www.nxtbook.com/farran/dentaltown/2013newgrad
https://www.nxtbook.com/farran/dentaltown/2013september
https://www.nxtbook.com/farran/dentaltown/2013august
https://www.nxtbook.com/farran/dentaltown/2013july
https://www.nxtbook.com/farran/dentaltown/2013june
https://www.nxtbook.com/farran/dentaltown/2013may
https://www.nxtbook.com/farran/dentaltown/2013april
https://www.nxtbook.com/farran/dentaltown/2013march
https://www.nxtbook.com/farran/dentaltown/2013february
https://www.nxtbook.com/farran/dentaltown/2013january
https://www.nxtbook.com/farran/dentaltown/2012december
https://www.nxtbook.com/farran/dentaltown/2012November
https://www.nxtbookmedia.com