.
Newbrun
Hofrath
Keyes
None
Primary resistance form
Outline form
Retention form
All
Mesiobuccal line angle
Axiogingival line angle
Both
None
Gold foil restoration
Cast gold restoration
Ceramic restoration
All
4
6
8
All
Carbon steel
Stainless steel
Both are same
None
In millimetres
In tenth of millimetres
Both
None
Double wedging
Piggy back wedging
Wedge wedging
All
Type ,V
Type IV
Type III
Nond
Deciduous teeth
Young age
Both
None
60 degree
45 degree
30 dgree
All
Primary retention
Secondary retention
Resistance form
All
Admixed low copper
Lathe cut low copper
Admixed high copper
None
4-5 degree per wall
6-8 degree per wall
10 degree
None
1:3
3:1
2:1
1:1
Increases
Decreases
Remains same
None
Lingual to contact area
Buccal to contact area
Gingival to contact area
None
Diverge
Converge
Either
None
Benzoin dimethyl ether
Tertiary amine
Both
None
1:2
3:1
2:1
1:1