Biomechanics in Orthodontics
- Course Code :
ORTH721
- Level :
Postgraduate
- Course Hours :
3.00
Hours
- Entry year :
2024/2025
- Department :
Faculty of Oral & Dental Medicine
Aim of the course
1. Introduces the residents to mechanical principles and their applications in orthodontic tooth movement and dentofacial orthopedics
2. Helps candidates to set-up simplified force systems to address any type of tooth movement necessary together with enhancement of wire bending skills for different clinical situations
Course Contents
1. Principles of biomechanics: (2 hours)
a. Newton’s laws of motion
b. Vector, scaler and resultant
c. Force and types of forces
d. Couple vs moment
e. Center of mass (gravity)
f. Center of resistance
g. Center of rotation
2. Principles of biomechanics: (2 hours)
a. Equivalent force systems.
b. Free body diagram.
c. Moment /force and type of tooth movement.
d. Static equilibrium
3. Principles of biomechanics: (2 hours)
One couple appliances (statically determinant systems) with examples.
4. Principles of biomechanics: (2 hours)
Two couple appliances (staticaly indeterminant systems) with examples.
5. Principles of biomechanics: (2hours)
a. V-bend principle (symmetric vs asymmetric) (center and off-center).
b. Step-bend force analysis
a) Knowledge and understanding
a.1. Discuss the major concepts and principles that are required to produce safe, predictable and efficient tooth movement.
a.2. Discuss implications for planning force magnitude, direction, and duration.
a.3. Compare and contrast couple vs moment.
a.4. Define the concept of "system equilibrium".
a.5. Differentiate between the concepts of vector, scaler and resultant in orthodontic forces.
a.6. Define center of mass (gravity), Center of resistance, center of rotation.
a.7. Describe free body diagram.
a.8. Describe equivalent force systems.
a.9. Discuss the effect of moment /force ratio on the type of tooth movement.
a.10. Compare and contrast between one-couple vs two-couple appliance systems.
a.11. Discuss biomechanical principles of different wire bending designs.
a.12. Define and enumerate basic principles of biomechanics
b) Intellectual Skills
b.1. Predict and analyze forces of different orthodontic appliances
c) Professional and Practical Skills
c.1. Design different appliances for a specific type of movement and various clinical situations.
c.2. Predict the type of movements associated with different appliance design.
c.3. Enhance the treatment outcome through applying sound biomechanical principles.
d) General and transferable skills
c.1. Design different appliances for a specific type of movement and various clinical situations.
c.2. Predict the type of movements associated with different appliance design.
c.3. Enhance the treatment outcome through applying sound biomechanical principles.
1- Lectures: aided by PowerPoint presentations
2- Problem based learning.
Teaching and Learning Methods for special needs students
a) Assessment Methods
3- Written Exam (MCQ, Short answer questions)
4- Oral Exam
5- Practical Exam: Clinical photographic assessment
b) Assessment Schedule
Written exam: Final
Oral exam: Final
Practical exam: Final
c) Weighting of Assessment
Final Exam:
Written 75
Midterm:
Theoretical: 37.5
Practical: 37.5
a) Course Notes
b) Essential Books (Text Books)
Proffit, W.R.: Contemporary Orthodontics, CV. Mosby Co., Louis, 2011.
c) Recommended Books
1. Ravindra Nanda. Biomechanics and Esthetic Strategies in Clinical Orthodontics. Saunders; Edition 1, 2005
2. Nanda, Ram S. Biomechanics in Orthodontics: Principles and Practice. Edition 1
3. Isaacson R, Lindauer S and Rubenstein L. Activating a 2 x 4 ap
d) Scientific periodicals,bulletins,etc...
To communicate with other healthcare professionals both verbally and in a globally accepted written formats.