Perhaps the forces in the mouth are far different than that of 100,000 RPM vibration.....We all have had our share of screws loose!!
I don't imagine too many materials can with stand a lot more torque on them.
dj
Dennis J. Jenkins DDS
Designing Smiles, PSC
Director, Greater Louisville Aesthetic Masters
Designing Smiles, PSC
Director, Greater Louisville Aesthetic Masters
812-246-3386 office
-----Original Message-----
From: Raymond J. Voller, DMD <drvoller@comcast.net>
To: 'Wayne Sutton' <Waynesutton@sbcglobal.net>
Cc: ACEsthetics <ACEsthetics@googlegroups.com>
Sent: Mon, Apr 1, 2013 2:09 pm
Subject: RE: [ACEsthetics] screw fractured.
-- From: Raymond J. Voller, DMD <drvoller@comcast.net>
To: 'Wayne Sutton' <Waynesutton@sbcglobal.net>
Cc: ACEsthetics <ACEsthetics@googlegroups.com>
Sent: Mon, Apr 1, 2013 2:09 pm
Subject: RE: [ACEsthetics] screw fractured.
I started via cutting a slot across the top, and HERE'S THE KICKER. Being at the very edge of when I was finishing torqueing, is when this fractured. One would think that this screw would be almost impossible to back out..however as SOON as I hit it with a mosquito diamond bur, it looked as though it had turned on me, and so I carefully checked it and lo and behold I COULD back it out after several tries. The concerning thing is this..If I was to the torque level it was supposed to be, how in the WORLD would a tiny touch with a mosquito diamond be able to have dislodged the remaining embedded screw at that amount of torque?! That REALLY bothers the dickens out of me. It should have been A LOT harder to back out. I didn't even need a slot cut into it..as SOON as I touched it with a bur, it was loose. That tells me that perhaps these amounts of torque aren't quite enough! I'm VERY skeptical now of screw torque, the 'bending' of the threads inside the implant body itself, etc. NO WONDER even with proper torqued screws, these things can back out and get loose! I've had it happen thrice on my own implants, torqued at manufacturers amounts. And yes we have our torque wrenches calibrated professionally once/year. You'd think that over time, the torque wrenches would come out of adjustment to the low side, because of fatigue of the metal on the wrench..hence 30 Ncm would really be less than that in real life. Ya know? Ray -----Original Message----- From: Wayne Sutton [mailto:Waynesutton@sbcglobal.net] Sent: Monday, April 01, 2013 1:18 PM To: drvoller@comcast.net Subject: RE: [ACEsthetics] screw fractured. Most importantly to everyone, How did you get this out Ray? :) Wayne Sutton, DDS,FACE,FAGD,FDOCS,FADIA 1330 Medical Center Dr. Suite #1 Rohnert Park, CA 94928 707-585-2555 707-585-3704 (fax) www.SonomaSmiles.com www.SuisunCityDental.com www.YourCaliforniaCosmeticDentist.com www.NorthernCaliforniaDentist.com -----Original Message----- From: acesthetics@googlegroups.com [mailto:acesthetics@googlegroups.com] On Behalf Of Raymond J. Voller, DMD Sent: Monday, April 01, 2013 10:12 AM To: Jim DiPerna; nelson@regosmiles.com; ACEsthetics@googlegroups.com Subject: [ACEsthetics] screw fractured. The crowns and the implant abutment fit beautifully on this case, however when I went to torque the screw down at 32 NCm, it fractured the screw. Implant Direct 3.0..Hmm..Not sure I like this company any more! LUCKILY I retrieved the screw without boogering up the top of the custom implant, however I'm pretty sure that 32 NCm is NOT too much torque for this, but correct me if I'm wrong. I've been in dentistry for 32 years and this is my first screw fracturing. Thoughts? Ray -- You received this message because you are subscribed to the Google Groups "ACEsthetics" group. To unsubscribe from this group and stop receiving emails from it, send an email to acesthetics+unsubscribe@googlegroups.com. To post to this group, send email to acesthetics@googlegroups.com. Visit this group at http://groups.google.com/group/acesthetics?hl=en. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "ACEsthetics" group. To unsubscribe from this group and stop receiving emails from it, send an email to acesthetics+unsubscribe@googlegroups.com. To post to this group, send email to acesthetics@googlegroups.com. Visit this group at http://groups.google.com/group/acesthetics?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
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