Study Notes

The Types of muscle cells. There are three types, red, white, and intermediate. White Fibers Fast twitch Large diameter, used for speed and strength. Depends on the phosphagen system and on glycolysis-lactic acid. Stores glycogen for conversion to glucose. Fewer blood vessels. Little or no myoglobin. Red Fibers Slow twitch Small diameter, used for endurance. Depends on aerobic me…

Velopharyngeal Insufficiency (VPI) Velopharyngeal insufficiency (VPI) is characterized by inadequate closure of the nasopharyngeal airway during speech production, leading to speech disorders such as hypernasality and nasal regurgitation. This condition is particularly relevant in patients who have undergone cleft palate repair, as the surgical success does not always guarantee proper function of the velopharyngeal mechanism. Etiology of VPI The etiolog…

Classification of Cementum Embryologically Primary and secondary 2. According to cellular component Acellular: Thin, Amorphous, First layer to seal the dentin tubules Cellular: Thick, Better structure, Apical surface Layers of cellular and acellular cementum alternate (randomly) 3. Based on the origin of the collagenous matrix Extrinsic Intrinsic Mixed 4. Combined classification a. Primary acellular intinsic fiber cementum b. Pr…

ORMOCER (Organically Modified Ceramic) ORMOCER is a modern dental material that combines organic and inorganic components to create a versatile and effective restorative option. Introduced as a dental restorative material in 1998, ORMOCER has gained attention for its unique properties and applications in dentistry. 1. Composition of ORMOCER ORMOCER is characterized by a complex structure that includes both organic and inorganic networks. The main compon…

Electrochemical Corrosion Electrochemical corrosion is a significant phenomenon that can affect the longevity and integrity of dental materials, particularly in amalgam restorations. Understanding the mechanisms of corrosion, including the role of electromotive force (EMF) and the specific reactions that occur at the margins of restorations, is essential for dental clinics 1. Electrochemical Corrosion and Creep A. Definition Electrochemical Corrosio…