From: An in vitro study evaluating the effect of ferrule design on the fracture resistance of endodontically treated mandibular premolars after simulated crown lengthening or forced eruption methods
Buccal Ferrule length
Simulated crown lengthening
Simulated forced eruption
0.0 mm/1.0 mm
P = 0.457
P = 0.712
0.0 mm/2.0 mm
P = 0.036a
P = 0.052
1.0 mm/2.0 mm
P = 0.154
P = 0.107