In vitro Evaluation of Effect of Dental Bleaching on the Shear Bond Strength of Sapphire Orthodontics Brackets Bonded with Resin Modifed Glass Ionomer Cement
Journal Title: International Journal of Medical Research & Health Sciences (IJMRHS) - Year 2017, Vol 6, Issue 11
Abstract
Aim: This study aimed to assess the effect of various types of bleaching agents on the shear bond strength of sapphire brackets bonded to human maxillary premolar teeth using resin modifed glass ionomer cement (RMGIC) and to determine the site of bond failure. Materials and Methods: Thirty freshly extracted maxillary human premolars were selected and assigned into three equal groups, ten teeth in each. The frst group was the control (unbleached) group; the second group comprised teeth bleached with hydrogen peroxide group (HP) 37.5% (in-offce bleaching) while the third group included teeth bleached with carbamide peroxide group (CP) 16% (at-home bleaching). The teeth in the experimental groups were bleached and stored in water one day then bonded with sapphire brackets using RMGIC with the control group and left another day. De-bonding was performed using Instron universal testing machine. To determine the site of bond failure, both the enamel surface and bracket base of each tooth were examined under magnifying lens (20X) of a stereomicroscope. Results: Results showed statistically highly signifcant difference in the shear bond strengths between control group and both of bleaching groups being low in the control group. Score III was the predominant site of bond failure in all groups. Conclusions: RMGIC provides adequate bond strength when bonding the sapphire brackets to bleached enamel; this bonding was strong enough to resist both the mechanical and masticatory forces. Most of the adhesive remained on the brackets, so it reduced the time required for removal of the bonding material’s remnants during enamel fnishing and polishing.
Authors and Affiliations
Zainab M Kadhom| Assistant Lecturer, Department of Orthodontics, College of Dentistry, University of Baghdad, Iraq, Harraa S Mohammed-Salih| Lecturer, Department of Orthodontics, College of Dentistry, University of Baghdad, Iraq, Mohammed Nahidh| Assistant Professor, Department of Orthodontics, College of Dentistry, University of Baghdad, Iraq, Corresponding e-mail: m_nahidh79@yahoo.com
Keywords
Related Articles
- EP ID EP12486
- DOI -
- Views 396
- Downloads 26
Surgically treated early stage cervical cancer – Prognostic factors and adjuvant treatment
Invasive cancer of cervix is considered a preventable disease as it has a long pre-invasive state. If detected in early stages i.e upto stage IIA1 the disease is curable with good survival rates. • To identify the pr...
Sero- Epidemiological trends of Dengue Fever in Jammu Province of J&K State
Dengue, an arthropod-borne arboviral disease is becoming a major public health concern, both in the tropical and subtropical regions of the world. In view of exponential increase in dengue positive cases reported in 201...
EFFECT OF OCIMUM SANCTUM LINN. IN STRESS INDUCED GASTRIC ULCERS IN RATS
Aims & Objectives: Ocimum sanctum L. popularly known as Tulsi is a medicinal plant that has been used for curing various diseases since ages. In the present study we used leaf extract of Ocimum sanctum for its anti-ulce...
Evaluation of Peripheral Nerve conduction and Visual evoked potential in newly diagnosed hypothyroid females.
Background: Hypothyroidism is a common medical condition in the general population. Usually hypothyroidism has both central and peripheral nerve involvement. The neurologic manifestations occur in conjunction with the...
CLINICOPATHOLOGICAL STUDY OF ENDOMETRIUM IN IUCD USERS
Background and Aims: Use of intrauterine contraceptive device (IUCD) is now a common practice. The present study was taken up to study the clinicopathological changes in endometrium following use of IUCD. Methods: Endo...