Home Print this page Email this page Small font size Default font size Increase font size   Users Online: 88
Home About us Editorial board Search Browse articles Submit article Instructions Subscribe Contacts Login 
Year : 2014  |  Volume : 3  |  Issue : 4  |  Page : 132-136

Moisture insensitive primer: A myth or truth

1 Department of Orthodontics and Dentofacial Orthopedics, Peoples College of Dental Sciences and RC, Bhopal, Madhya Pradesh, India
2 Corps Dental Unit, Department of Orthodontics and Dentofacial Orthopedics, Bhopal, Madhya Pradesh, India
3 Department of Orthodontics, IDS, Bareilly, Uttar Pradesh, India
4 Department of Periodontics, IDS, Bareilly, Uttar Pradesh, India

Correspondence Address:
Dr. Rajkumar Maurya
Corps Dental Unit, Bhopal, Madhya Pradesh
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2278-0203.143235

Rights and Permissions

Objectives: To compare the mean shear bond strength (SBS) of moisture insensitive primer (MIP) used for orthodontic bonding in the presence and absence of saliva. Materials and Methods: A total of 60 human noncarious maxillary premolars with sound buccal surfaces, recently extracted were collected in two groups of each 30. Maxillary premolar brackets were bonded to the teeth using light cure (Transbond XT, 3M Unitek, Monrovia, CA, USA) and MIP (Transbond MIP 3M Unitek, Monrovia, CA, USA,) in the presence and absence of saliva. Operators' saliva was used during the bonding under moist condition. After debonding, all the specimens were examined under a stereomicroscope (×40 magnification) for adhesive remnant using adhesive remnant index (ARI). The SBS tests were done using Instron universal testing machine at cross-head speed of 1 mm/min, force passing parallel to the buccal surface using custom rod and registered in Newtons later converted into Megapascals. Results: Light cure and MIP (Transbond MIP and Transbond XT, 3M Unitek, Monrovia, CA, USA) in the absence of saliva showed higher mean SBS than the presence of saliva. Group I (light cure and MIP) in the absence of saliva showed mean SBS of 9.65 ± 0.90 Mpa. Group II (light cure and MIP) with the presence of saliva showed mean SBS of 9.03 ± 1.14 Mpa. The difference between both the groups was statistically significant, as confirmed by paired t-test (P < 0.05). In-Group I, ARI scores showed that more than half of the adhesive was left over the tooth surface, and Group II showed that there was no or insignificant amount of adhesive left over the tooth surface. Chi-square test revealed significant difference in debonding characteristics among the test groups of ARI (P < 0.05). Failure occurred mainly in resin- bracket base and resin - adhesive interfaces (χ² = 10.04, df = 3, P = 0.031). Conclusion: Moisture insensitive primer is effective in the presence/absence of moisture and has shown SBS value of more than 7.8 Mpa as stated by Reynolds, hence material is suitable for clinical use.

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
    PDF Downloaded338    
    Comments [Add]    
    Cited by others 2    

Recommend this journal