Journal of Iranian Dental Association
J Iran Dent Assoc
Medical Sciences
http://jida.ir
23
journal23
2383-3041
10.52547/jida
en
jalali
1391
1
1
gregorian
2012
4
1
24
2
online
1
fulltext
en
Experimental Comparison of Hygroscopic Expansion in Three Different Composite Resins
Restorative Dentistry
Restorative Dentistry
Original
Original
<div style="text-align: justify;"><sup><strong>Background and Aim </strong><strong>: </strong>These days dental composites are very popular because they look good and are similar to human teeth regarding color. Hygroscopic expansion is one of the physical properties of dental composites. A dental composite may lose its efficiency as a restoration material because of water absorption. The objective of this study was to compare the hygroscopic expansion of three dental composites . </sup></div>
<p style="text-align: justify;"><sup> <strong>Materials and Methods </strong><strong>: </strong>In this experimental study, to assess the effective factors of hygroscopic expansion, we used three different dental composites (Kalore, P90 and Z250). The length of these composites in water and saliva were measured eighteen times in a three-month period. We used the marginal modeling technique, in which the correlation between response data can be included for analysis . </sup></p>
<p style="text-align: justify;"><sup> <strong>Results </strong><strong>: </strong>The results of marginal modeling showed that the type of composite is significantly related to hygroscopic expansion (P<0.05) demonstrating the highest hygroscopic expansion for P90 and the lowest for Z250. In addition, time as an independent variable had a statistically significant effect on hygroscopic expansion (P<0.05). However, we found no significant difference between the hygroscopic expansion of saliva and water (P>0.05). </sup></p>
<p style="text-align: justify;"><sup> <strong>Conclusion </strong><strong>: </strong>Overall, our findings showed that hygroscopic expansion is significantly related to the type of composite and time. Therefore, we should utilize the composites with lower hygroscopic expansion (such as Z250) for filling the patients’ teeth . </sup></p>
<p></p>
Composite resin , Hygroscopic expansion , Longitudinal studies
35
42
http://jida.ir/browse.php?a_code=A-10-1-606&slc_lang=en&sid=1
Farid
Zayeri
fzayeri@yahoo.com
2300319475328460018523
2300319475328460018523
Yes
Assistant Professor, Proteomics Research Center, School of Paramedical Sciences, Shahid Beheshti, University of Medical Sciences. Tehran, Iran.
Sara
Razmavar
2300319475328460018524
2300319475328460018524
No
Iranian Center for Dental Research, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Kazem
Naserinejad
2300319475328460018525
2300319475328460018525
No
MS Student, Department of Biostatistics, School of Paramedical Sciences, Shahid Beheshti University of Medical Sciences. Tehran, Iran
Alireza
Akbarzadeh-Baghban
2300319475328460018526
2300319475328460018526
No
Assistant Professor, Department of Biostatistics, School of Paramedical Sciences, Shahid Beheshti University of Medical Sciences. Tehran, Iran
Hasan
Torabzadeh
2300319475328460018527
2300319475328460018527
No
Associate Professor, Department of Operative Dentistry, School of Dentistry, Shahid Beheshti University of Medical Sciences. Tehran, Iran
Masoud
Salehi
2300319475328460018528
2300319475328460018528
No
Assistant Professor, Department of Statistics and Mathematics, School of Management and Medical Informatics, Tehran University of Medical Sciences. Tehran, Iran.