Dental change .pptx
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Two types of cells give rise to teeth: epithelial cells and ectomesenchymal cells. Tooth development occurs in stages including initiation, proliferation, histodifferentiation, morphodifferentiation, and apposition. The advanced bell stage dictates the final size and shape of the tooth as the network of tissue matrix is formed.
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A Brief Description about the development of teeth. Understanding the process of tooth development is of particular importance for the dentist; as developmental disturbances may occur at any stage of this process resulting in different types of tooth anomalies.
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An interim fixed restoration must satisfy biological, mechanical, and esthetic requirements. Biologically, it must protect the pulp, maintain periodontal health through good fit and smooth contours, and establish proper tooth position and occlusal contacts. Mechanically, it must withstand function through adequate strength, prevent displacement, and allow removal without damage. Esthetically, it must match tooth color and shape, and allow feedback from the patient to refine the contours before fabrication of the definitive restoration.
Dermatitis.pptx
Dermatitis, also known as eczema, is a common skin condition characterized by redness, swelling, and intense itching. It is caused by skin irritation or sensitization and can develop from allergic, irritant, or autoimmune factors. The main types of dermatitis include contact dermatitis, which occurs when the skin comes into contact with an irritating substance, and atopic dermatitis, a chronic inflammatory skin disease. Treatment focuses on eliminating triggers, moisturizing the skin, and using topical corticosteroids or oral antihistamines to reduce inflammation and itching.
phantomic endodentic.ppt
This document discusses special anatomic problems that can occur during canal cleaning and shaping, including curved canals, calcified canals, C-shaped canals, and S-shaped canals. It provides guidelines for managing each type of anatomic problem, such as using smaller files, pre-curving files, changing filing techniques, copious irrigation, and adjusting filing forces. Managing complex canal anatomies requires modified cleaning and shaping approaches to complete the endodontic procedure successfully.
prevention.ppt
This document discusses various types of tooth eruption disorders, including:
1) Premature eruption which includes natal and neonatal teeth. Natal teeth erupt at birth while neonatal teeth erupt within 30 days of birth.
2) Eruption sequestrum which is a small irregular bone fragment overlying an erupting permanent molar.
3) Delayed eruption which occurs when a tooth erupts more than 6 months after the normal eruption time. Local and systemic factors can cause delays.
4) Multiple unerupted teeth which is uncommon and sometimes associated with genetic syndromes.
5) Embedded or impacted teeth which fail to erupt into normal positions and includes lack of erup
Seyedsaeid Seyedraoufi.ppt
This document discusses the diagnosis of tuberculosis (TB). It outlines the common sites where TB disease occurs, including the lungs, pleura, central nervous system, and others. It describes symptoms of TB such as fever, night sweats, and weight loss. The evaluation for TB involves testing for HIV, medical history, physical exam, and bacteriologic or histologic testing. Sputum smear microscopy and culture can detect TB bacteria, though cultures are needed to distinguish TB from other mycobacteria. Chest x-rays are also used in diagnosis but cannot confirm TB. The document provides guidance on diagnosing TB in children and notes risk factors like household TB contact.
Hyper sensetivity ll.ppt
Mr. Weld, a 71-year-old retired engineer, developed double vision and drooping eyelids. Examination found limitations in eye movements and high levels of antibodies against the acetylcholine receptor, indicating myasthenia gravis. Treatment with pyridostigmine helped but caused diarrhea. His condition worsened over time, affecting facial muscles and breathing. Hospitalization and treatment with azathioprine led to improvement. Myasthenia gravis is an autoimmune disorder where antibodies block signal transmission at the neuromuscular junction, causing muscle weakness that worsens with activity.
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Learning objectives:
1. Describe the organisation of respiratory center
2. Describe the nervous control of inspiration and respiratory rhythm
3. Describe the functions of the dorsal and respiratory groups of neurons
4. Describe the influences of the Pneumotaxic and Apneustic centers
5. Explain the role of Hering-Breur inflation reflex in regulation of inspiration
6. Explain the role of central chemoreceptors in regulation of respiration
7. Explain the role of peripheral chemoreceptors in regulation of respiration
8. Explain the regulation of respiration during exercise
9. Integrate the respiratory regulatory mechanisms
10. Describe the Cheyne-Stokes breathing
Study Resources:
1. Chapter 42, Guyton and Hall Textbook of Medical Physiology, 14th edition
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Dental change .pptx
- 1. (dental changes) Name: Seyedsaeid Seyedraoufi Subject: Pediatric McDonald - Dentistry for the Child and Adolescent. Mosby Elsevier, 2011 Lecturer: Prof: Thinathin Davithaia Dec 2020
- 2. Two types of cells give rise to teeth • Those two tissue are formed from ectoderm and mesoderm. Epithelial cells Ectomesenchymal cells
- 3. Stages of tooth development
- 4. The initial formation of an expansion of the basal layer of the oral cavity immediately above the basement membrane. (initiation)
- 5. Resulting in the formation of the tooth germ. (proliferation)
- 6. Basal layer continues to exist and is now divided into an inner and an outer dental epithelium. (histodifferentiation)
- 7. (Morphodifferentiation) The cells find an arrangement that ultimately dictates the final size and shape of the tooth. The advanced bell stage
- 8. Network or tissue matrix of the tooth is formed.
- 10. Stages in tooth development Physiological stages • growth • initiation • proliferation • histodifferentiation • morphodifferentiation • apposition (stage occurs when the network or tissue matrix of the tooth is formed) • eruption • attrition (Bud stage) (cap stage) (bell stage) (the advanced bell stage) (Calcification)
- 11. It belongs to a series of a growth lines in tooth enamel known as the Striae of Retzius