Biomechanics fundamentals of orthodontic therapy

– Biomechanics in orthodontics

– The main tasks in planning orthodontic treatment

– Basic principles of mechanics

– Static and static analysis of the system

– Mechanical forces: the principle of operation in teeth movement

– Static equilibrium: basic provisions

– The law of transmissibility

– Activating and deactivating forces

– Bending and tensile forces

– Characteristics rigid and hard bodies

– Center of the mass and center of gravity

– The center of resistance of an individual tooth and a group of teeth

– Apical migration of the center of resistance

– Moment of force: trends in rotation and translation

– Localization of the center of resistance

– The phenomenon of jamming when moving teeth

– The use of cantilevers: advantages.

Recommended for: Orthodontis, General dentist.

– Force and components producing forces

– Mathematics in orthodontics:

- Angle of application of force, line of action of force, point of application of force

- Calculations in 2D and 3D coordinate systems

- Horizontal and vertical force components

- Summing up the effects of two forces: rules

- Calculation of the angle of the force vector.

– An example of calculating forces when moving a molar

– Analysis of dental movement by calculating vectors

– The tendency to rotation: prerequisites

– The couple of forces: definition and calculation

– Creating a moment of force in the braces

– Dental movement: the relationship between movement and the force system

– Qualitative analysis of the purity of forces

– The concept of the center of resistance

– Types of dental movement: translation, pure rotation, central rotation

– Method of calculating the geometric center of rotation

– Calculation of the distance between the center of resistance and the center of rotation.

Recommended for: Orthodontis, General dentist.

– Torque in orthodontics

– Design of orthodontic treatment

– Equivalent force systems: fundamentals of the concept

– The system of forces on braces and determining appliances

– Forces applied to the body movement of the tooth

– The single force concept

– The couple of forces concept: the main provisions

– Static equilibrium in orthodontic biomechanics

– Arch activation and deactivation forces

– Deactivating force systems

– Forecasting the position of the rotation center

– Selection of the microimplant position: mechanical aspects

– Determination of the need to use anchorage: mathematical calculation

– Occlusal forces as part of the anchorage

– Requirements for anchorage elements

– Asymmetric expansion of the jaws: application of differentiated forces.

Recommended for: Orthodontis, General dentist.

– The role of occlusion in anchorage

– Creation of an artificial occlusal surface: methodology and clinical recommendations

– Lower incisors as anchorage

– Equilibrium: problems of the system of forces

– Statically defined mechanics

– Single-point contact with ligature: pros and cons

– Line of action concept: cantilevers

– Straightening the position of molars: mechanics

– Indications for the use of cantilevers

– Mechanics of extrusion and straightening and the position of the canine

– Extrusion and straightening of the molar position

– Creating the reverse direction of the moment

– Advantages of cantilevers.

Recommended for: Orthodontis, General dentist.

– Statically defined mechanics: force measurement

– Application of cantilever: mechanics design

– Absolutely constant units of forces

– The concept of qualitative constancy

– Arch selection: rules and recommendations

– The problem of using circular arcs

– Configurations and direction of force

– Activation of cantilevers: technique

– Combined cantilevers: mechanics

– Combination of activation in different directions

– Cantilever support design

– Two vector mechanics: mathematical justification.

Recommended for: Orthodontis, General dentist.

– Statically indeterminate mechanics: characteristic

– Generation of forces inside the bracket groove

– 6 geometry options in orthodontics

– High and low geometry: analysis of forces and vectors

– Clinical hints when working with continuous arcs

– Practical application of the force system

– The concept of chaotic alignment

– Limits of using chaotic alignment and continuous arch

– Practical alignment rules

– Difficulties in correcting the rotation of teeth

– Alignment by activating the terminal edge

Recommended for: Orthodontist, General dentist.

– Indications for bending arch

– The concept of force in arch bending

– The technique of creating a stepped bend

– V-shaped bending: systems of forces and features

– Technique of applying V-shaped bends: tips

– Changing the position of the canine with a V-shaped bend: example

– The concept of α-β activation

– Opening and closing forces

– Linear activation

– Predicting the movement of a tooth or a group of teeth

– Methods of measuring forces in the α-β system.

Recommended for: Orthodontist, General dentist.

– Anchorage in orthodontics: definition and meaning

– The history of screws as a skeletal anchorage

– TADs: basic principles

– Biomechanics of screws

– Indications for the use of skeletal anchorage

– Position of screws: rules for choosing the optimal position

– Reasons for the loss of screws

– Screw design selection: criteria

– Direct and indirect use of screws

– Moment of force in the area of the screws: rules

– Mesio-distal movements using TADs

– Methods of asymmetric distal movement of an individual tooth and a group of teeth

– Introduction of posterior teeth: mechanics.

Recommended for: Orthodontist, General dentist.