Cavo surface angle

[Guest guest]

What is the CSA of Amalgam at the cusp slopes ?also when should it be 11o is it

gingivally??

Thanks

Moka

[Guest guest]

Hi

cavosurface angle should be bt 90 and 110,

If less than 90-unsupported enamel

if greater than 110-thin amalgam at the margins which lead to fracture of

amalgam at margins

so smallest 90

greater. 110

------------------------------

On Mon, May 21, 2012 20:15 CEST Mokaamr@... wrote:

>Hi all

>Could someone pls explain the smallest and largest to avoid amalgam fracture??

>Smallest 70 but is the largest 90 or 11o .If larger CSA will the restoration or

tooth be at risk?

>Thanks

>

[Guest guest]

Thanks Yehya,so does it mean in both cases fracture of enamel not tooth structure ?On 29 May 2012, at 15:53, Yehya Farhoud <yehyaf@...> wrote:

Hi

cavosurface angle should be bt 90 and 110,

If less than 90-unsupported enamel

if greater than 110-thin amalgam at the margins which lead to fracture of amalgam at margins

so smallest 90

greater. 110

------------------------------

On Mon, May 21, 2012 20:15 CEST Mokaamr@... wrote:

>Hi all

>Could someone pls explain the smallest and largest to avoid amalgam fracture??

>Smallest 70 but is the largest 90 or 11o .If larger CSA will the restoration or tooth be at risk?

>Thanks

>