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Showing posts with the label UPPSC Dental surgeon exam

ponts index and Andrew keys of occlusion

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Certainly! Here's an explanation of Pont's Index and Andrew's Six Elements of Ideal Occlusion in dentistry: **Pont's Index:** Pont's Index is a dental measurement used to assess the proportion of tooth-size discrepancies between the maxillary (upper) and mandibular (lower) dental arches. It specifically focuses on the incisors. The index helps to determine if there is a significant difference in tooth sizes between the upper and lower incisors, which can impact occlusion and overall dental harmony. **Calculation of Pont's Index:** The Pont's Index is calculated by adding the mesiodistal widths of the maxillary incisors (central and lateral) and dividing it by the sum of the mesiodistal widths of the mandibular incisors (central and lateral). **Pont's Index Formula:** Pont's Index = (Sum of Maxillary Incisor Widths) / (Sum of Mandibular Incisor Widths) **Interpretation of Pont's Index:** - If the calculated index is close to 1.0, it su

Purpura

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Purpura is a medical term that refers to a condition characterized by the presence of purple or red discolorations on the skin, mucous membranes, or other tissues due to the leaking of blood from small blood vessels into the surrounding tissues. Purpura can be a sign of underlying medical conditions or can occur as a result of certain factors affecting the blood vessels or clotting mechanisms. Here are some key points about purpura: **1. Types of Purpura:** - **Petechiae:** Tiny, pinpoint-sized red or purple spots on the skin or mucous membranes. They occur when small blood vessels called capillaries break. - **Ecchymoses:** Larger patches of purplish discoloration caused by bleeding under the skin. - **Purpura Simplex:** A mild form of purpura characterized by easy bruising, often without an underlying medical condition. - **Henoch-Schönlein Purpura:** A type of purpura caused by inflammation of blood vessels, usually seen in children, and associated with joint pain and ab

Gutta percha and sodium hypochlorite

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Gutta-percha is a commonly used dental material for root canal treatment and obturation. It is derived from the latex of the Palaquium gutta tree and is known for its excellent sealing properties, biocompatibility, and ease of manipulation. The composition of gutta-percha typically includes gutta-percha itself along with certain additives to improve its properties. Here's the basic composition: **1. Gutta-Percha (Main Component):**    - Gutta-percha is a natural polymer derived from the latex of various trees, primarily the Palaquium gutta tree.    - It forms the main bulk of the material used for root canal obturation. **2. Zinc Oxide:**    - Zinc oxide is commonly added to gutta-percha to improve its radiopacity, making it visible on dental X-rays.    - Radiopacity is important for assessing the quality of the root canal fillings on X-ray images. **3. Resin:**    - A resin component is often added to gutta-percha to improve its handling characteristics and adaptabilit

twin block appliance

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The Twin Block appliance is a type of orthodontic appliance used to correct malocclusion, particularly Class II malocclusion, which involves an overbite where the upper teeth significantly overlap the lower teeth. Developed by Dr. William J. Clark, the Twin Block appliance aims to modify the relationship between the upper and lower jaws, thereby improving the alignment of the teeth and the overall bite. Here's an overview of the Twin Block appliance: **Design and Components:** The Twin Block appliance consists of two separate components, one for the upper jaw and one for the lower jaw. Each component typically comprises two acrylic blocks: one for the upper jaw (maxillary block) and one for the lower jaw (mandibular block). The blocks have inclined planes that guide the lower jaw into a forward position, helping to correct the overbite. **Working Mechanism:** The Twin Block appliance works on the principles of functional orthodontics. It encourages the lower jaw to assu