Orthodontics

Anterior Crossbite Anterior crossbite is a dental condition where one or more of the upper front teeth (maxillary incisors) are positioned behind the lower front teeth (mandibular incisors) when the jaws are closed. This misalignment can lead to functional issues, aesthetic concerns, and potential wear on the teeth. Correcting anterior crossbite is essential for achieving proper occlusion and improving overall dental health. Methods to Correct Anter…

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…

BONES OF THE SKULL   A) Bones of the cranial base:      A)  Fontal  (1)      B)  Ethmoid  (1)           C)  Sphenoid (1)       D)  Occipital  (1)      B) Bones of the cranial vault:           1. Parietal (2)                  2. Temporal…

Expansion in orthodontics refers to the process of widening the dental arch to create more space for teeth, improve occlusion, and enhance facial aesthetics. This procedure is particularly useful in treating dental crowding, crossbites, and other malocclusions. The expansion can be achieved through various appliances and techniques, and it can target either the maxillary (upper) or mandibular (lower) arch. Types of Expansion Maxillary Expansion: …

Wolff's Law: Bone adapts to pressure/tension via resorption/deposition Law of Orthogonality: Related to Wolff's Law Trajectorial theory: Benninghoff's lines indicate stress pathways Bone growth types: Intramembranous: Frontal, Zygomatic, Maxilla, etc. Endochondral: Ethmoid, Inferior nasal concha Mixed: Mandible, Sphenoid, Temporal…