Nano Composites and Light Cure Composites - A Comparative Assessment of Bond Failure Rates

Foundation University Islamabad

Status: Active, not recruiting

Conditions: Nanotechnology, Dental Materials, Composites

Treatments: Combination Product: Conventional Composite Group (Transbond XT); Combination Product: Nanohybrid Compisite Group (Filtek Z250)

Study type: Interventional

Funder types: Other

Identifiers

NCT05644860

FUI/CTR/2022/19

Details and patient eligibility

About

This randomized clinical trial is aimed to evaluate the bond failure rates of the brackets bonded with nano-hybrid composites (Filtek Z250) to that of conventional composites (Transbond XT)

Full description

Orthodontic brackets are attached to the teeth with a robust bonding material called composite resin, however sometimes the bond between the braket and the tooth surface may fail halting the desired tooth movement. Repeated bond failures like these are inconvenience both for the orthodontists as well as the patients. With each bracket loosening due to bond failure, treatment time is prolonged as the activation planned on eash visit is delayed resuling in increased treatment time.

Nanotechnology has recently made a breakthrough in dental materials through incorporation of nanoparticles. Composites containing nano-filler particles exhibit higher compression strength, flexural strength, elastic modulus and wear resistance (Rabia and Bilal). In vitro studies have shown that nanohbrid composites have shear bond stregnths similar to that of conventional composites however the environment of oral cavity is challenging and there are no long term clinical trials to validate these results.

The aim of this study is to compare the rate of bond failure between the brackets bonded with nano hybrid composites and that of the conventional composites over a period of six months.

Enrollment: 40 estimated patients

Sex: All

Ages: 12 to 35 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Patients having treatment with fixed metallic orthodontic appliances
• Patients in whom both upper and lower arches are bonded in single visit

Exclusion criteria

• Patients with variations in morphology of teeth
• Patients with defective enamel, dentine and cementum
• Patiens with parafunctioal habits
• Patients with restorations involving the facial surface of teeth

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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40 participants in 2 patient groups

Conventional Composite Group (Transbond XT)

Active Comparator group

Description:

Patients in which brackets will be bonded with conventional composite resin (Transbond XT)

Treatment:

Combination Product: Conventional Composite Group (Transbond XT)

Nanohybrid Compisite Group (Filtek Z250)

Experimental group

Description:

Patients in which brackets will be bonded with nanohybrid composite resin (Filtek Z250)

Treatment:

Combination Product: Nanohybrid Compisite Group (Filtek Z250)