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Paper ID S009 : Development of the extracoronal attachment “Gigauss C 600 EC Keeper Tray” 

Posted Messages (Last post: Tue Mar 20 22:49:03 2007)
[0001] [0002] [0003] [0004] 
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[0001]
Masayuki HIDESHIMA (Tokyo Medical and Dental University )

Thank you for a detailed presentation.
I would be obliged if you describe the “R” part area in detail and the reason why thickness of “R” is limited to 0.1mm without processing and is limited 0.4mm at the maximum with processing.

--- Tue Mar 13 17:12:52 2007

[0002]
Hiroyuki Nakashima (GC DENTAL PRODUCTS CORP )

Thank you for your questions.

The neck part which R has more than 0.1mm interfere the housing pattern without processing.
And the confined neck part can't set R more than 0.4mm.

--- Mon Mar 19 23:38:18 2007

[0003]
Yoshinori Nakamura (Aichi-Gakuin University )

Thank you for your questions.

It is required to provide enough strength in an extracoronal attachment, especially in the neck region. The general prosthetic technology providing the strength is to set high corner R to distribute stress. However, corner R needs to be minimal to place components into the limited space in clinical practice.

--- Tue Mar 20 10:36:03 2007

[0004]
Masayuki Hideshima (Tokyo Medical and Dental University )

Thank you for your answers.
It is hard for me to realize the structural difference between the “R0.1” and “R0.4”. So I hope you explain the neck part with some figures or pictures at another opportunity.

--- Tue Mar 20 22:49:03 2007