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However while explaining the basic mechanism of caries it does not indicate how the effect of the mechanism is modified to give the observable pattern of caries. In the second stage there is dissolution of the softened residue of the enamel and dentin.
During the 17th and 18th centuries the theory was that teeth were destroyed by acids formed in the oral cavity.
Acidogenic theory of dental caries. Acidogenic Theory or the Chemicoparasitic theory explained by D Miller about the Etiology of Dental caries is the most widely accepted and most useful which helps you understand the actual cause of Caries. This theory is a blend of 2 theories explained in the earlier parts of 1800s Chemicoparasitic Theory. Chemical Theory Parasitic Theory.
Dental Caries etiology. Dental Plaque metabolism. Glucose adverse effects.
Acidogenic Theory or the Chemicoparasitic theory explained by D Miller about the Etiology of Dental caries is the most widely accepted and most useful which helps you understand the actual cause of Caries. This theory is a blend of 2 theories explained in the earlier parts of 1800s Chemicoparasitic Theory. Chemical Theory Parasitic Theory Theory.
Caries is caused by. Acidogenic theory Quick Reference A theory describing the cause of dental caries first postulated by Willoughby D. Miller in 1890 which stated that non-specific bacteria in the plaque fermented refined carbohydrates to produce acid that demineralized tooth enamel.
ACIDOGENIC THEORY WD Miller was the first well known scientist and investigator of dental caries and published his results in 1882. According to him dental decay is a chemoparasitic process It is a two stage process there is decalcification of the enamel which also results in the destruction of the dentin. In the second stage there is dissolution of the softened residue of the enamel and dentin.
Nearly 90 years after being put forward by WD. Miller the acidogenic theory of dental caries aetiology is supported by a wealth of experimental evidence. However while explaining the basic mechanism of caries it does not indicate how the effect of the mechanism is modified to give the observable pattern of caries.
Millers chemico-parasitic theorythe acidogenic theory Proposed by Willoughby D Miller. This theory is a blend of both chemical and parasitic theory proposed earlier. Ac to this theory dental caries is a chemico-parasitic process consisting of 2 stages.
First decalcification of enamel and dentin preliminary stage second dissolution of the softened residue later stage. Chemical acid theory. Parmly 1819 proposed that an unidentified chymical agent was responsible for caries.
According to this theory teeth are destroyed by the acids formed in the oral cavity by the putrefaction of protein which produced ammonia and was subsequently oxidized to nitric acid. In the first stage there is destruction is done by the acid attack where as the dissolution of the residue is carried by the proteolytic action of the bacterias. This whole process is supported by the presence of carbohydrates microorganisms and dental plaque.
5 PROTEOLYTIC THEORY 6 PROTEOLYTIC THEORY. The evidence given by the acidogenic theory. Microbiota of dental caries Dental caries happens mainly when the production of organic acid results in dental hard tissue decalcification.
Thus dental caries bacteria should be acid-tolerant in carrying out the dental caries process in an acidic environment. 17 Acidogenic bacteria eg. Mutans are able to function at pH 6 and can carry out.
As was mentioned in chapter 1 there have been a number of theories concerning the aetiology of dental caries of which the acidogenic theory has been the most generally accepted. According to this theory caries is initiated by organic acids produced by oral bacteria as a result of their fermentative activity on carbohydrates. An analysis of the acids produced in human dental plaques.
Zhonghua Kou Qiang Ke Za Zhi 21269-72 127 01 Mar 1986 Cited by. 0 articles PMID. During the 17th and 18th centuries the theory was that teeth were destroyed by acids formed in the oral cavity.
In this theory it was believed that putrefaction of protein led to formation of ammonia which was subsequently oxidised to nitric acid. In other words fermentation was considered a non-vital process. Diagrammatic representation of acidogenic theory of causation of dental caries.
Four factors namely a suitable carbohydrate substrate 1 micro-organisms in dental plaque 2 a susceptible tooth surface 3 and time 4. Must be present together for dental caries to occur 5. Saliva 6 and fluoride 7 are modifying factors.
Acid affecting dissolution comes from fermentation of starch and sugar blocked in the holding centers of the teeth. Miller - states caries occurs because of MO presence - bacteria is essential to caries formation - chemoparasitic process only exposure required. A theory describing the cause of dental caries first postulated by Willoughby D.
Miller in 1890 which stated that non-specific bacteria in the plaque fermented refined carbohydrates to produce acid that demineralized tooth enamel. CARIES THEORIES OF DENTAL CARIES. The Acidogenic theory The Proteolytic theory Proteolysis chelation theory ACIDOGENIC THEORY WD Miller was the first well known scientist and investigator of dental caries and published his results in 1882.
According to him dental decay is a chemo-parasitic process It is a two-stage process where there is decalcification of.