Dr. Surya Kanta Das
Dr Surya Kanta Das did his masters in Orthodontics from the King George Medical University, Lucknow in 2002. Over a time he has contributed new innovations that enables one to practice Lingual Orthodontics without lab dependency.Modified Hiro’s technique, occlusal window transfer tray, D-LUC and DT3C Devices are some of his noted work.He is honored to be the Director and faculty in Chief of the mini-residency program in the Post Graduate Dept. of Orthodontics and Dentofacial Orthopedics, SCB Govt. Dental College, Cuttack, Odisha, India.
Title: Statistical evidence over Parables on Bond strength of Lingual brackets customized with Composite base: An amalgamation of Clinical and in-vitro research findings.
Aim: To study the impact of various clinical parameters on the incidence of debonding of lingual brackets customized with composite base and compare it with the results of an in-vitro study on bond strength evaluation.
Method: An in-vitro study was conducted to evaluate the bond strength and site of bond failure of composite modified bracket base, bonded to lingual surface with different thickness of composite pad i.e 1mm, 2mm and 3mm on 200 healthy premolar teeth (extracted for orthodontic reasons).
Clinical data of 231 lingual orthodontic cases with composite modified bracket base were tabulated sequentially as per the day of bonding and the incidence of debonding in relation to various clinical parameters like composite pad thickness, site of debonding, occlusal bite block and facial pattern was studied.
Findings of both the studies were amalgamated to derive various clinical inferences.
Result: Findings of the in-vitro study showed that the bond strength and the site of bond failure were different for different thickness of composite pad base but these findings did not match with the pattern of debonding in the clinical study. In the clinical study site of bonding, occlusal bite blocks and facial pattern had a significantly more influence than the thickness of composite base.
- The incidence of clinical bracket debonding is more in the posterior teeth region than anteriors, irrespective of the composite base thickness.
- As occlusal bite block influence the incidence of debonding significantly, their design and handling is an important clinical step during lingual bonding.