Effect of Ferrule Location on Fracture Resistance of Maxillary Premolars: An In Vitro Study

• Main Authors: Sara Koosha (Author), Mahdieh S. Jebelizadeh (Author), Azam S. Mostafavi (Author)
• Format: Book
• Published: Hindawi Limited, 2023-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

Objectives. The present study aimed to assess the effect of ferrule location on fracture resistance of maxillary premolars. Materials and Methods. A total of 72 extracted human maxillary premolars were selected and randomly assigned to six groups (n = 12 in each) considering ferrule location: circumferential ferrule (CF), without ferrule (WF), buccal ferrule (BF), lingual ferrule (LF), mesial ferrule (MF), and buccal-lingual ferrule (BLF). Cast posts were cemented into the prepared post spaces. Following conventional impression, Ni-Cr crowns were cemented to the specimens. After thermocycling (5,000 cycles, 5-55°C), the specimens were loaded at 45° in a universal testing machine until fracture. Data were analyzed with one-way ANOVA, Kolmogorov-Smirnov, and Tamhane tests. Results. The maximum and minimum mean fracture resistance were related to the CF (1,143.84 N) and WF (514.89 N) groups, respectively, (P=0.039). Fracture resistance in the BF (933.67 N) and BLF (874.01 N) groups was significantly higher than in the MF group (617.54 N) (P=0.001). There was no significant difference between the MF, LF (722.89 N), and WF groups in terms of fracture resistance (P>0.05). Conclusion. Teeth with CF showed maximum fracture resistance. The location of the ferrule effects on the fracture resistance of maxillary premolars and also the mode of failure.

Item Description

1687-8736
10.1155/2023/9513804