Etiology of Dental Caries
Etiology of Dental Caries
The four circles Micro- diagrammatical organisms represent the factors inⅴ olved nQ carie care in the carious host Sub process. all four tooth strate factors must act nQ no concurrently caries carie (overlapping of the circles)for time caries to occur
The four circles diagrammatically represent the factors involved in the carious process.all four factors must act concurrently (overlapping of the circles)for caries to occur Microorganisms host & tooth Subcaries strate time no caries no caries no caries no caries
Host factor saliva What is saliva here mean? a. major saliva glands Saliva parotid, submandibular, sublingual b. minor gland C. gingival exudate
Host factor: saliva What is saliva here mean? a. major saliva glands Saliva parotid, submandibular, sublingual b. minor gland c. gingival exudate
Why saliva? 豢 Animal experiments Clinical observations
Why Saliva? Animal experiments Clinical observations
Animal experiment Effect of desalivation on caries in hamsters Group No hamsters Avg. no. Avg caries carious teeth score Intact salivary glands 20 4.0 Desalivated o 10 10.5 39.0 Parotid, submandibular, and sublingual glands
Animal experiment Group No. hamsters Avg. no. Avg. caries carious teeth score Intact salivary glands 20 2.3 4.0 Desalivated* 10 10.5 39.0 * Parotid, submandibular, and sublingual glands. Effect of desalivation on caries in hamsters
Clinical observations Xerostomia decreased or lack of salivary secretion Cause: therapeutic radiation salivary glands disorder (e.g. Sjogren syndrome) taking medicine
Clinical observations Xerostomia: decreased or lack of salivary secretion Cause: therapeutic radiation salivary glands disorder (e.g. sjogren syndrome) taking medicine
Clinical observation
Clinical observation
Caries in a patient with impaired salivary function as result of radiation therapy(courtesy of Drs Jansma and vissink. rug. the netherlands
Caries in a patient with impaired salivary function as result of radiation therapy (courtesy of Drs Jansma and Vissink, RUG, the Netherlands
The caries is different from common Decay offer seen in cervical area, a rapid demineralization over broad surfaces with no cavity. the huge change in quantity of saliva is responsible
The caries is different from common. Decay offer seen in cervical area, a rapid demineralization over broad surfaces with no cavity. the huge change in quantity of saliva is responsible
In xerostomia The amount of bacteria t The quality of plaque change S mutans, Lactobacillus, Yeast, Actinomyce t S sanguis, Veillonella, Neisseria
In xerostomia The amount of bacteria The quality of plaque change S.mutans, Lactobacillus, Yeast, Actinomyce S. sanguis, Veillonella, Neisseria
