Orthodontics

Myofunctional Appliances Myofunctional appliances are removable or fixed devices that aim to correct dental and skeletal discrepancies by promoting proper oral and facial muscle function. They are based on the principles of myofunctional therapy, which focuses on the relationship between muscle function and dental alignment. Mechanism of Action: These appliances work by encouraging the correct positioning of the tongue, lips, and c…

Types of Springs In orthodontics, various types of springs are utilized to achieve specific tooth movements. Each type of spring has unique characteristics and applications. Below are a few examples of commonly used springs in orthodontic appliances: 1. Finger Spring Construction: Made from 0.5 mm stainless steel wire. Components: Helix: 2 mm in diameter. Active Arm: The part that exerts force on the tooth. Retentive Arm: Helps retain the …

Concept Detail Cephalogram film distance 15 cm Most posterior point of foramen magnum Opisthion Smile for diagnosis Posed smile Duchenne smile Unposed smile Ricketts esthetic line Pronasale to chin Yaw Left-right movement of maxilla Point O Sassouni analysis convergence point ANB angle Riedel Steiner's chevrons ANB with incisor positions …

Wire Characteristics Resilience: Area under stress-strain curve up to proportional limit; energy storage capacity Formability: Permanent deformation before failure Ideal wire properties: High strength, low stiffness, high range, high formability Nomograms: Developed by Kusy for wire comparison Shape memory & superelasticity: Unique to NiTi alloys Wire Types & Inventors Wire Type Inventor/Details NiTi William F. B…

Key Cephalometric Landmarks Sella (S): The midpoint of the sella turcica, a bony structure located at the base of the skull. It serves as a central reference point in cephalometric analysis. Nasion (N): The junction of the frontal and nasal bones, located at the bridge of the nose. It is often used as a reference point for the anterior cranial base. A Point (A): The deepest point on the maxillary arch, l…