Ebook Shafer''s textbook of oral pathology (7th edition): Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook Shafer''s textbook of oral pathology (7th edition): Part 2
Ebook Shafer''s textbook of oral pathology (7th edition): Part 2
Section IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2 Associated with Tooth PreparationỈ (. Effect of Tooth Preparation1 L Reaction To Rotary Instrumentation11. Effect of HeatI I. Effect of Restorative Materials'1Í. Physical Injuries of the TeethM Physical Injuries of the Bone'1Í. Physical Injuries of Soft Tissues11. Nonallergic Reactions to Drugs and Ebook Shafer''s textbook of oral pathology (7th edition): Part 2 Chemicals used SystemicallyM Occupational Injuries of the Oral CavityM Occlusal Trauma2083Injuries of the oral cavity may be caused by physical or chEbook Shafer''s textbook of oral pathology (7th edition): Part 2
emical causes. Physical injuries may be iatrogenic, self-inflicted, traumatic, or occupational. The most important iatrogenic cause is the repair of tSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2adiation. Self-induced or factitious injuries are due to overzealous oral hygiene practices, caused by psychotic or neurotic condition, or habitual. Traumatic causes include a fall, fight, road traffic accidents, and sports injuries.Although chemical injuries are caused by environmental elements suc Ebook Shafer''s textbook of oral pathology (7th edition): Part 2h as toxic levels of chemicals in the water, air, or consumables, the restorative and endodontic materials used in the routine dental practice play anEbook Shafer''s textbook of oral pathology (7th edition): Part 2
important role.Injuries of Teeth Associated with Tooth PreparationThe teeth, particularly the dentin and pulp, may be injured not only by dental cariSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2rations include cutting, grinding, and etching with acids etc. These physical and chemical methods of tooth preparation as well as the various medicaments and filling materials which are inserted into the prepared tooth, have their own effects.Effect of Tooth Preparation2084The effect upon the denta Ebook Shafer''s textbook of oral pathology (7th edition): Part 2l pulp of restorative procedure alone is difficult to assess except in the sound tooth, since the carious lesion itself produces demonstrable changesEbook Shafer''s textbook of oral pathology (7th edition): Part 2
in both the dentin and the pulp. Even when a sound tooth is prepared for experimental purpose, care must be taken in observing the effects to separateSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2y rotary instillments such as tungsten carbide burs and diamond burs of different sizes and shapes. Lasers and air abrasion are also used alternatively. Pulpal responses to these various procedures depend on the heat generated by friction, cutting of odontoblastic processes and drying of dentinal tu Ebook Shafer''s textbook of oral pathology (7th edition): Part 2bules, thickness of remaining dentin, vibration, removal of minerals and exposure of the organic matrix of dentin, and formation of smear layer.ReactiEbook Shafer''s textbook of oral pathology (7th edition): Part 2
on to Rotary InstrumentationStainless steel burs revolving at low speed were used in the past for cavity and crown preparation. As the hardness of theSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2g the procedure, which results in excessive heat production and evaporation of the contents of the dentinal tubules. High speed rotary instrumentation with tungsten carbide and diamond burs has replaced the steel burs in recent years. Nevertheless stainless steel burs are used in procedures involvin Ebook Shafer''s textbook of oral pathology (7th edition): Part 2g bone.2085rhe reaction of the dental pulp to culling of dentin with a dental bur has been studied by f ish in both dogs and monkeys. When dentin is iEbook Shafer''s textbook of oral pathology (7th edition): Part 2
njured, there is stasis of the contents of the dentinal tubules, which lose their fluid communication with the pulp because of the formation of secondSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2the rest of the tooth.The cavities prepared by Fish in the teeth of dogs or monkeys were cut with steel burs which were kept wet to prevent the complication of heat-induced damage to the pulp. In some cases the cavities were then filled with copper oxyphosphate cement and in other instances they wer Ebook Shafer''s textbook of oral pathology (7th edition): Part 2e left open and exposed to the oral fluids. The animals were sacrificed after varying periods of time, and sections of the filled teeth were preparedEbook Shafer''s textbook of oral pathology (7th edition): Part 2
for microscopic study. Three general reactions to cavity preparation were noted: (1) the production of secondary dentin, (2) changes in the odontoblasSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Ebook Shafer''s textbook of oral pathology (7th edition): Part 2of a calcified barrier and secondary dentin production is always strictly confined to the pulp surface of the injured dentinal tubules. There is never overlap of uninjured tubules, and for this reason the changes may be regarded as a specific reaction to injury of the dentinal tubules.The pulp react Ebook Shafer''s textbook of oral pathology (7th edition): Part 2ion to superficial injury of the dentin varies in degree of severity, depending partially upon the depth of the prepared cavity and partially upon theEbook Shafer''s textbook of oral pathology (7th edition): Part 2
elapsed time between culling the cavity and extraction of the tooth for study. In mild reactions the odontoblasts become distorted and reducedSection IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of Teeth Section IIIInjuries and Repair2082Chapter 12Physical and ChemicalInjuries of the Oral CavityB. SivapathasundharamChapter Outline11. Injuries of TeethGọi ngay
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