lesion affecting hard dental structure

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Information about lesion affecting hard dental structure
Health & Medicine

Published on January 31, 2014

Author: UDDent

Source: slideshare.net


Introduction to Operative Dentistry
Third Year

Carious Defects It is a tooth decay process where bacterial processes damage Lesions Affecting Hard Dental Tissues hard tooth structure (enamel, dentin and cementum) by producing acid using sugar and starch from food particles It is not simply a progressive demineralization but is an alternating process of demineralization and remineralization Carious Defects Classification according to clinical sites Pit and fissure caries Smooth enamel surface caries Root surface caries Non-carious Defects Attrition Abrasion Abfraction Erosion Enamel hypoplasia Factors Enamel hypomineralization Tooth Substrate Plaque Time Discoloration Malformation Traumatized tooth Attrition A physiological, continuous, age dependent process resulting in loss of tooth structure from direct frictional forces between contacting teeth Tooth sites affected Presentation Causes Most common areas: * occlusal insisal (most common) * proximal surface (rare) Affect range: *reduction of tooth hight due to enamel lost Abrasion It is the loss of tooth structure due to direct frictional forces between the teeth and external object Tooth sites affected Presentation Causes *e.g. brushing * usually @ cemento-enamel junction * V shape mark, * premolars & canine r mostly affected, also incisal nudge of anterior teeth * why premolars & canine? the most promenent * Cause: eating seads, hard brushing, cutting nails(incisal) … Causes: * lost of posterior teeth? bcause it keeps anterior in position * occupation: e.g. working in iron industry, iron react with the saliva and cause extra (tression) *presente as flatting 1

Abfraction Erosion These are the wedge shaped defects which are present in the cervical areas of the teeth caused by the tensile stresses generated during mastication The loss of tooth structure by a chemical dissolution Tooth sites affected Tooth sites affected Presentation Presentation Causes due to acids that does not involve bacteria Causes * P from tensile stresses during forces of mastication are presented in small cracks > ultimately lead to major surface lost * why in cementoenamel junction? less enamel thickness * Abfraction is sharper than abraison + involvement of gum (it's not always easy to differentiate) * in bacteria there is discoloration, non in erosion * Accourse in: palatal, lingual of incisal WHAY? in front and mostcontact with external inviroment * Deffected surface is smooth & highly polished with (?) deppretion * primary in enamel. Severe in dentine= sensitivity Causes: edupathic: the pationt donno the cause * chem industry worker, vitamen C, swimming pool, Enamel Hypoplasia Enamel Hypocalcification Defect in the enamel of the tooth due to injury to ameloblasts during the enamel matrix formative stage Defect in the enamel of the tooth due to injury to ameloblasts during the mineralization stage Causes Causes Presentation Presentation *Skin desieces: chikenbox, diffesinsy of vitemine , hypochalcemia, florosis Discoloration Deviation from the normal orthodox tooth shade inner surface: from denten: troma(bleeding: only 1 tooth), floride, Intrinsic tetraciclean Causes Extrinsic staining, smoking, food & drinks Age - related enamel get thinner Malformation Deviation form normal shape and size, hereditary in origin Micro or Macro Peg shaped lateral )(‫!"#$ ورا‬ 2

Traumatized Teeth Separation, fracture or loss of tooth structure as result of trauma Causes fall, accedent most affected: incisal Books Theodore M. Roberson , Harold O. Heymann , Edward J., Jr. Jr. Swift. Swift. Sturdevant's Art and Science of Operative Dentistry. Mosby, Dentistry. Mosby, Elsevier Satish C., Shaleen C & Girish C. (2007)Text book of operative 2007) dentistry. Indian: dentistry. Indian: Jaypee (Chapter 4 & 36) 36) Thank You 3

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