Home Print this page Email this page Small font size Default font size Increase font size   Users Online: 3024
Home About us Editorial board Search Browse articles Submit article Instructions Subscribe Contacts Login 
ORIGINAL ARTICLE
Year : 2023  |  Volume : 12  |  Issue : 1  |  Page : 6

Evaluation of bond strength of orthodontic brackets using light- and chemical-cure adhesive systems over time: An in-vitro study


1 Dental Materials Research Center, Mashhad University of Medical Sciences; Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
2 Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
3 Dentist, Graduate Student of Mashhad University of Medical Sciences, Mashhad, Iran

Correspondence Address:
Mostafa Entezari
Department of Orthodontics, Mashhad Dental School, Vakilabad Blvd, P.O. Box: 91889-44728, Mashhad
Iran
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jos.jos_31_22

Rights and Permissions

AIMS: This study aimed to evaluate the bond strength of light- and chemical-cure adhesive systems over six months. MATERIALS AND METHODS: A total of 144 sound human maxillary first and second premolars were randomly divided into six groups according to the adhesive type (i.e., Transbond XT and Unite) and evaluation time. The groups were T0 (24-h group without thermocycling), T1 (24-h group with thermocycling), T2 (1-month group), T3 (2-month group), T4 (4-month group), and T5 (6-month group). The bond strength was then measured and the data were analyzed by SPSS software (version 23) through the independent t-test and one-way ANOVA. A P value less than 0.05 was considered statistically significant. RESULTS: The results of this study showed that shear bond strength of chemical-cure orthodontic adhesive (Unite, 15.37 MPa) at all-time points was significantly 1.37 times higher than that of the Transbond XT light-cure adhesive (11.15 MPa). Moreover, shear bond strength of self-cure adhesive (Unite) 1 month after debonding showed a significant difference with the 24-h group without thermocycling (P = 0.002), 24-h group with thermocycling (P = 0.008), and 6-month group (P = 0.016). The highest shear bond strength in both adhesives was observed at one month. Furthermore, the shear bond strength of Transbond XT light-cure adhesive one month after debonding showed a significant difference with the 24-h group without thermocycling (P = 0.000) and 24-h group with thermocycling (P = 0.000), as well as with the 2-month (P = 0.008), 4-month (P = 0.000), and 6-month groups (P = 0.016). CONCLUSION: Unite self-cure adhesive compared to Transbond XT light-cure adhesive has higher bond strength and is recommended for rebonding brackets in patients with multiple rebonds.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed872    
    Printed104    
    Emailed0    
    PDF Downloaded66    
    Comments [Add]    

Recommend this journal