Waldo2012

5+ Year Member
Aug 11, 2010
63
2
NE
Status
Dental Student
Neither. The left has better angles but doesn't have retention. Right has a bit of an undercut but not smooth walls.
 

Nat426

10+ Year Member
7+ Year Member
Mar 11, 2009
286
5
Status
Dental Student
Also your material choice drives your prep form. Gold, composite, amalgam?
 

Bereno

Smoking Monkey
7+ Year Member
Apr 15, 2011
1,986
472
Cincinnati, OH
Status
Resident [Any Field]
To be technical, the left is more correct though both are no good. Assuming an amalgam resto...