Connecticut School of Biomechanics (CSB) Lesson 2: Mechanics, Biomechanics & Force Lesson 3: Vector Mechanics Lesson 4: Force system Lesson 5: Center of rotation Lesson 6 : Types of tooth movement (Copy) Lesson 7: Equivalent Force Systems Lesson 8: Moment/Force (M/F) ratios Lesson 9: Equillibrium Lesson 1: Lever Mechanics Lesson 2: One couple force systems Lesson 3: Appliances with One couple Force systems-I Lesson 4: Appliances with One couple Force systems-II Lesson 5: Two couple force systems Lesson 14: Appliances with Two Couple Force Systems Coming soon: BIO-1
for the thinking mind!

A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth

JOVE 2020 (Download link: Journal of Visualized Experiments)

This is a preview of a video & project reported in JOVE. We have used state of the art technology to accurately locate the Center of Resistance of any tooth or segments in the oral cavity. It is a multi-step project. The first paper is out. https://www.jove.com/video/60746/a-finite-element-approach-for-locating-center-resistance-maxillary Two other papers will follow with many other in the pipeline. This is a multi-year project aiming to create a reliable data base for locating the Cres of every tooth & segment of teeth in the oral cavity by evaluating many individuals.

Mechanics of a 2 x 4 appliance

JOVE : 2018 (Download link: for the paper)

A proper understanding of the force system created by various orthodontic appliances can make treatment of patients efficient and predictable. Reducing the complicated multi-bracket appliances to a simple two-bracket system for the purpose of force system evaluation will be the first step in this direction. However, much of the orthodontic biomechanics in this regard is confined to 2D experimental studies, computer modeling/analysis or theoretical extrapolation of existing models. The objective of this protocol is to design, construct and validate an in vitro 3D model capable of measuring the forces and moments generated by an archwire with a V-bend placed between two brackets.

Which orthodontic appliance is best for Oral Hygiene?

AJODO: 2018; (Download: Am J Orthod Dentofacial Orthop 2018;153:175-83)

The effects of clear aligners, self-ligated brackets and conventional (elastomeric-ligated) brackets on patient oral hygiene was evaluated. Sixty-eight patients were randomly assigned to the three groups based on ‘appliance type’ for orthodontic treatment. Short-term (9 month) & long-term (18 month) evaluation of plaque index, gingival index and periodontal bleeding Index, was carried out through treatment. Periodontal parameters worsened for all the groups as the treatment progressed. Long term outcomes showed no evidence of any significant difference in the oral hygiene levels between the groups. 

En masse protraction of posterior teeth .

AJODO 2016: (Download link: Am J Orthod Dentofacial Orthop 2016;150:864-75)

Protraction of mandibular posterior teeth requiring absolute anchorage has always been a challenge, especially when the space is located in the anterior region, since more teeth must be protracted. Traditionally, skeletal anchorage devices have been used for anchorage reinforcement during protraction. However, drawbacks such as requirement of a surgical step, inability to tolerate heavy forces, and patient willingness to undergo such surgical procedures can be limiting factors. Additionally, the mechanics involved can sometimes create undesirable side effects, thereby limiting their application in such situations. This report describes the use of a fixed functional appliance as an anchorage-reinforcement device for en-masse protraction of mandibular posterior teeth into a missing lateral incisor space.