Nerve Anatomy Nerve Transmission Speed A-alpha: largest diameter, heavy myelin, fastest Mediate position and fine touch through muscle spindles and skeletal muscle efferents A-beta: large diameter, medium myelin, medium speed Mediate proprioception; respond to non-noxious mechanical stimuli A-delta: small diameter, minimal myelin, medium speed Carry pain and temperature (fast) C-fibers: smallest diameter, no myelin, slowest […]
Indications for Extraction There are several indications for the extraction of impacted third molars, depending on the position and soft tissue envelope. Root resorption, caries, and demineralization of the 2nd molar. The presence of impacted 3rd molars during a bilateral sagittal split osteotomy may increase the likelihood of an unfavorable split and therefore may be
Exam & Assessment Same as nasal bone fracture Pain Bleeding Swelling Laceration Crepitation/bony step Mobility of the segment Deviation of dorsal hump/septum Septal hematoma Epiphoria Telecanthus Bowstring Test Lid is pulled laterally while the tendon area is palpated to detect movement of fracture segments. Bimanuel Palpation Place an instrument in the nose and push laterally
Exam & Assessment Same as nasal bone fracture Pain Bleeding Swelling Laceration Crepitation/bony step Mobility of the segment Deviation of dorsal hump/septum Septal hematoma Epiphoria Telecanthus Bowstring Test Lid is pulled laterally while the tendon area is palpated to detect movement of fracture segments. Bimanuel Palpation Place an instrument in the nose and push laterally
Naso-Orbital-Ethmoid Complex Read Post »
Epistaxis Anterior nasal bleed – 90% of the nasal bleed comes from Kiesselbach’s plexus Greater palatine Anterior ethmoid Sphenopalatine Superior labial Posterior nasal bleed Woodruff’s plexus Comprised of 5 bones Maxilla Frontal bone Nasal bone Vomer Ethmoid Anatomy of the Nose Inferior edge of nasal bone is continuous with the upper lateral cartilage Lateral border of
Facial Nerve (CN VII) Branches of Facial Nerve Temporal Zygomatic Buccinator Marginal Mandibular Cervical Anatomy of Temporal Region Layers of Temporoparietal Region Skin Subcutaneous tissue Temporoparietal fascia Superficial layer of temporalis fascia Temporalis Deep layer of temporalis fascia The temporoparietal fascia is frequently called the superficial temporal fascia or the suprazygomatic SMAS and is an
Signs and Symptoms of Mandible Fracture Pain and tenderness at the fracture site Changes in occlusion Ecchymosis of the floor of the mouth or skin Crepitation on manual palpation Soft tissue bleeding Sensory disturbances (numbness of the lower lip) Changes or deviation of the mandible on opening Soft tissue swelling Trismus Flexion or segmental mobility
Layers of the SCALP The skin and subcutaneous tissue of the scalp are surgically inseparable. In addition, no easy plane of cleavage exists between the subcutaneous fat and the musculoaponeurotic layer. The aponeurosis is the true galea and has two portions, an extensive intermediate aponeurosis between the frontalis and occipitalis muscles and a lateral extension into
Frontal Sinus & Skull Read Post »
AKA: hemartoma Incidence: first two decades, mean age 14 Treatment: local excision Compound Odontoma multiple, small toothlike structures Anterior maxilla Multiple toothlike structures of varying size and shape surrounded by a narrow radiolucent zone Complex Odontoma mass of enamel and dentin Molar region of either jaw Calcified mass with radiodensity of tooth structure (enamel and
AKA Sialo-Odontogenic Cyst Incidence middle aged adults, mean age of 46 to 51 years of age. Rarely does it occur before the age of 20. Clinical presentation Although it is generally accepted as being of odontogenic origin, it also shows glandular or salivary features. Cysts can vary from small lesions less than 1 cm to
Glandular Odontogenic Cyst Read Post »
