Need help please.

[morphology]

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Please can anyone help me for amalgam cavity preparation? what is the design for class II cavity on mandibular molar? I mean if i want to prepare MO on mandibular molar, should I involve distal pit or I should extend till central point? so, if I extend to distal point then it is conventional/ideal, right? what about conservative preparation? Please friends help me.

Thank you in advance.

 

[morphology]

No one? please friends help.