Related Experiment Video
Updated: Mar 3, 2026
06:16
A Probing Device for Quantitatively Measuring the Mechanical Properties of Soft Tissues during Arthroscopy
Published on: May 1, 2020
5.9K
Prototype to measure bracket debonding force in vivo
Jéssika Lagni Tonus1, Fernanda Borguetti Manfroi1, Gilberto Antonio Borges2
1Department of Dental Materials, Pontifícia Universidade Católica do Rio Grande do Sul, Brazil.
Dental Press Journal of Orthodontics
|April 27, 2017
Summary
A new prototype reliably measures orthodontic bracket debonding force in vivo. This device demonstrated comparable results to in vitro testing, validating its use for assessing bracket-enamel bond strength in clinical settings.
Area of Science:
- Biomaterials Science
- Orthodontics
- Dental Materials
Background:
- In vivo material biodegradation can reduce bracket-enamel bond strength compared to in vitro findings.
- Accurate in vivo measurement is crucial for understanding clinical bond performance.
Purpose of the Study:
- To develop and validate a prototype device for measuring in vivo bracket debonding force.
- To compare in vivo bond strength measurements with traditional in vitro methods.
Main Methods:
- A modified plier with an integrated strain gauge was developed to measure debonding force.
- The prototype was used to test bracket debonding in vivo on bovine teeth.
- A universal testing machine was used for in vitro tensile bond strength testing for comparison.
Main Results:
- The prototype yielded in vivo bond strength values (2.96 MPa) not significantly different from in vitro tensile bond strength (3.08 MPa).
- The Adhesive Remnant Index (ARI) score of 3 was predominant in both testing groups.
Conclusions:
- The developed prototype is a reliable tool for measuring in vivo orthodontic bracket bond strength.
- The findings support the use of this prototype for clinical evaluation of bracket adhesion.
