نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار، گروه ﺗﺮﻣﻴﻤﻲ و زیبایی، داﻧﺸﻜﺪه دﻧﺪاﻧﭙﺰﺷﻜﻲ، داﻧﺸﮕﺎه ﻋﻠﻮم ﭘﺰﺷﻜﻲ ﺷﻬﻴﺪ ﺻﺪوﻗﻲ، ﻳﺰد، اﻳﺮان
2 استاد، گروه ﺗﺮﻣﻴﻤﻲ و زیبایی ، داﻧﺸﻜﺪه دﻧﺪاﻧﭙﺰﺷﻜﻲ، داﻧﺸﮕﺎه ﻋﻠﻮم ﭘﺰﺷﻜﻲ ﺷﻬﻴﺪ ﺻﺪوﻗﻲ، ﻳﺰد، اﻳﺮان
3 دستیار تخصصی، گروه ﺗﺮﻣﻴﻤﻲ و زیبایی ، دانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید صدوقی، یزد، ایران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Background: Restoring endodontically treated maxillary premolars, especially in the presence of a cervical lesion, can be a challenge. In such cases, short fiber reinforced composites (SFRC) may be effective. This study aimed to evaluate the effect of composite type on the fracture strength of endodontically treated premolars with cervical defects.
Methods and Materials: A total of 50 human maxillary premolars were collected for this study. At first, 3 specimens were selected as negative controls. Then, standard mesio-occluso-distal (MOD) cavities and cervical defects were prepared on the buccal surfaces of the remaining specimens. After root canal treatment, 3 specimens were left unrestored and served as the positive control group. The remaining specimens were divided into four equal groups (n=11) according to the type of composite, i.e. SFRC (everX Flow, GC) and conventional (G-aenial Posterior, GC) composites used to restore MOD and cervical cavities. After restoration, the compressive strength was tested using a universal testing machine with a crosshead speed of 1mm/min while the fracture patterns were assessed under an optical microscope. Fracture strength values were subjected to one-way analysis of variance (ANOVA) and Tukey post hoc tests while the fracture patterns were analyzed by Chi-square test. The significance level was set at P<0.05.
Results: Fracture strength values in the group where both MOD cavities and cervical lesions were restored with SFRC composite, were significantly higher than in the group where MOD cavities were restored with conventional composite (P=0.018). No other significant differences were observed between the groups. Regarding fracture patterns, no significant differences were found among the groups.
Conclusion: According to the obtained results, using SFRC for restoring cervical lesions, can enhance the fracture resistance of endodontically treated maxillary premolars and teeth restored with SFRC exhibited more restorable fractures compared to other groups.
کلیدواژه‌ها [English]
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