An evaluation of the effect of retention means on increasing the debonding strength of the denture acrylic teeth attached to the denture base resin

Abstract EN

The debonding of acrylic teeth from the denture base is a challenging problem to the dentist and dental technician in which special means must be done to increase the debonding strength of the tooth.

Material and method : Sixty specimens of acrylic central incisors were attached to acrylic rods and grouped into 5 groups according to the shape of the retention means placed at the tooth ridge lap.

The specimens were strained under tension to examine their debonding strength.

Results : The teeth with serrations (Group 2) have shown to be the most effective mean of increasing debonding strength, followed by the 2 longitudinal grooves (Group 4) where the difference between these groups was insignificant.

Then followed by the teeth with 4 holes, and finally the difference between the teeth with a central groove and the control group were insignificant.

Conclusions : It is recommended that the tooth ridge lap should be serrated with a fissure groove or placement of the 4 grooves to increase the debonding strength of the tooth