Open AccessFracture Resistance of Incisal Fragments Following Reattachment With Different Techniques in Simulated Crown Fractures
Author(s) -
Fatih Tulumbacı,
Volkan Arıkan,
Aylin Akbay Oba,
Serdar Bağlar
Publication year - 2017
Publication title -
journal of lasers in medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.443
H-Index - 21
eISSN - 2228-6721
pISSN - 2008-9783
DOI - 10.15171/jlms.2017.33
Subject(s) - medicine , dentistry , crown (dentistry) , universal testing machine , bond strength , fracture (geology) , acid etching , coronal plane , orthodontics , maxillary central incisor , tooth fracture , incisor , composite material , ultimate tensile strength , materials science , adhesive , radiology , layer (electronics)
The aim of the present study was to evaluate and compare the effect of acidetching and Er, Cr:YSGG laser treatment before the reattachment of incisal fragments in coronal fractures of permanent incisor teeth. Methods: Sixty-six sound human maxillary incisors were randomly divided into 3 groups (n=22). Teeth were embedded in self-cure acrylic resins by leaving one-third of the crowns out, and uncomplicated crown fractures were obtained using an Instron testing device. The fragments were reattached using 3 different procedures and a hybrid resin composite (Z250): Group I: Acid etching + Prime & Bond NT; Group II: Er,Cr:YSGG + Prime & Bond NT; Group III: Er,Cr:YSGG + Acid etching + Prime & Bond NT. The percentages of shear bond strengths were determined by comparing fracture strengths of sound and reattached teeth for 3 groups. All data were analyzed statistically with Kruskal-Wallis H test. Results: Mean fracture strengths of the reattached fragments were between 51.02% and 62.93% of that of the sound teeth in all groups. Group I had significantly higher percentages of shear bond strength values ( P <0.05) when compared to group II and group III. No significant difference ( P >0.05) was found between group II and group III. Conclusion: The findings of the present study show that Er,Cr:YSGG laser irradiation prior to the reattachment of incisal fragments has a negative effect on fracture strength.