Journals SDC 9/24/22 Journals SDC 9/24/22

Original Research

KEYWORDS:Biosafety,Atomicabsorptionspectrometer,Artificialsaliva,Nanocoating

Year : 2022 | Volume : 13 | Issue : 3 | Page : 10-21

Evaluation and comparison of copper and zinc ion release from copper-oxide and zinc-oxide nanoparticles coated orthodontic brackets- An In vitro Study

Nausheen Mobeen1,Sangeetha Duraisamy 2,K.Ravi 3

1Post Graduate,2 Professor,3 Dean and HOD,SRM Dental College,Ramapuram, Chennai

Corresponding author:

Dr.NausheenMobeen,M.D.SPG,

Dept of Orthodontics and Dentofacial Orthopaedics, SRM Dental College, Ramapuram

Email-nausheenmobeen@gmail.com

Phone number-9952922347

Abstract

AIM :

To evaluate the release of zinc and copper ions from zinc oxide and copper oxide nanoparticles coated orthodontic brackets in artificial saliva under Invitro condition.

METHODOLOGY :

Thirty six metal brackets were coated with copper oxide (group A) and zinc oxide (group B ) nanoparticles using spray pyrolysis method and bracket was randomly selected and assessed under scanning electron microscope. The nano-coated brackets with copper oxide and zinc oxide nanoparticles (Group A and B) were bonded on the extracted first premolar tooth with standard protocol and immersed in artificial saliva at pH of 6.5. The nanocoated brackets were analysed for ion release using atomic absorption spectrometer at four different time intervals baseline, day 7, day 14, and day 21 under invitro condition.

RESULT:

The highest concentration of zinc ion released from the zinc oxide and copper oxide nano coated brackets in the artificial saliva was on the 7th day and the quantity of zinc ion released was well below the levels that are toxic to humans throughout the study period.

CONCLUSION:

The concentration of zinc ions released zinc oxide nano coated brackets was significantly greater than the concentration of copper ion released from the copper oxide nano-coated brackets in the artificial saliva under similar experimental conditions.

Keywords:

Zinc oxide nanoparticles, copper oxide nanoparticles, ion release, nanomaterials.

SOURCE OF FUNDING

None

CONFLICT OF INTEREST

There is no conflict of interest.

How to cite this Article: Mobeen, N., Duraisamy, S., & K, R. (2022). Evaluation of the Ion release from nanoparticles coated orthodontic brackets - In vitro Study: Original research. International Journal of Orthodontic Rehabilitation, 13(3), 10–21. https://doi.org/10.56501/intjorthodrehabil.v13i3.288

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Journals SDC 6/25/22 Journals SDC 6/25/22

Original Article

Keywords: Elastomeric ligature, Force decay, Force degradation, Mechanical testing

Year : 2022 | Volume : 13 | Issue : 2 | Page : 25-36

An In -Vivo Study to Evaluate the Force Decay of Three Different OrthodonticElastomericLigatures.

Dr.Shabeer Ali Parambil1, Dr.Sangeetha Duraisamy 2, Dr.Krishnaraj R3, Dr.Ravi. K4

1Registrar Orthodontist, AsterSanadHospital,Riyadh,Saudi Arabia2,3Professor,DepartmentofOrthodontics,SRM DentalCollege,Ramapuram,Chennai4Professor,HeadoftheDepartment,DepartmentofOrthodontics,SRM DentalCollege,Ramapuram,Chennai.

Abstract:

Aim & Objectives:

The aim of the in-vivo study was to evaluate the force decay of three different clear elastomeric ligatures at four different time intervals.

Materials and methods:

Ten patients undergoing fixed orthodontic treatment with 0.019" x 0.025" SS arch wire placed passively in the lower arch were included. The three groups of clear elastomeric ligatures from three different manufacturers were placed on the specific lower incisor assigned to each. The force levels required to stretch the modules to a predetermined length of 4.1mm were evaluated at 0 hour, 24 hours, 7 days and 21 days after intra-oral use using a universal testing machine. One way ANOVA followed by Post hoc Tukey HSD was performed for within the group and between group comparisons.Paired T test was done for pairwise comparisons. (P value≤ 0.05)

Results:

The mean force level recorded were high for as received elastomeric ligatures in all the three study groups and all demonstrated a significant force decay over time. One way ANOVA showed a significant difference between the force levels recorded at different time intervals within and between the groups. Post Hoc Tukey HSD revealed a significant difference between the three groups at all the time intervals except at 7 days and 21 days for Group II and Group III samples. Paired sample T test for pairwise comparison of force exerted at different time intervals in all the three groups revealed a significant difference.

Conclusion:

Group I elastomeric ligatures exhibited significantly high mean force and less force decay compared to Group II and Group III samples. All the three ligatures exhibited significant force decay over time. Keywords: Elastomeric ligature, Force decay, Force degradation, Mechanical testing