Biomechanics in orthodontics
Biomechanics in orthodontics
Course overview
Online course in biomechanics for all orthodontists.
Lecturer - Giorgio Fiorelli - the founder of modern biomechanics, doctor and master of orthodontics at the University of Siena, Italy.
This course is a complete guide to achieving sustainable long-term results when working with biomechanics.
The first 4 lessons are devoted to the basic principles of biomechanics, without which it is impossible to start orthodontic treatment of a patient. The next 4 lessons are based on clinical applications of biomechanics.
The training is suitable for both novice orthodontists and more experienced doctors. After all, knowledge of biomechanics is the key to your success in treating patients.
Course lessons
Lesson 1. Treatment planning and mechanics design
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.
Lesson 2. Teeth movement prediction. Force systems
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.
Lesson 3. Torque. Positioning of braces. Introductory lesson
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
Lesson 4. Torque. Positioning of braces
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.
Lesson 5. Anchorage. Tools for effective treatment
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.
Lesson 6. Statically determinate mechanics. Basic principles
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.
Lesson 7. Geometry and alignment
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
Lesson 8. Geometry and bends
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.
Lesson 9. Skeletal anchorage. Mechanics of working with TADs
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.
