Dep. of Operative Dentistry Endodontics School of Stomatology Fourth Military Medical University

1. Dep. of Operative Dentistry & Endodontics School of Stomatology Fourth Military Medical University

3. Contents Self-introduction Caries Biological basis of Operative Dentistry Cavity Preparation Research papers

4. Self-introduction

5. prefix dent- , denta- ?,? dent-al ?? dent-al caries ? dent-al materials ???? dent-alloy ???

6. denti- , dento - ?, ? dentist ???? dentistry ??? dentition ?? Operative Dentistry ????(??)?

7. odonto-, odont- ?, ? Odonto-logy ??? endo-, end- ?,??,?? end-odontics ???? peri- ??,?? peri-odonto-logy ???? ped(o) - ?????? ped-odontics ?????

8. Conservative Dentistry Operative Dentistry & Endodontics Periodontology & Oral Medicine Pedodontics Department of Conservative Dentistry Operative Dentistry & Endodonics

9. stomato-, stomat- ?? ?? stomatic ??? Stomato-logy ??(?)? School of Stomatology ????? stomatological ????? stomat-itis ???

10. oral ?? � cavity ?? � microflora ???? � hygiene ???? oralogy ???

11. in vitro ?? (????) in vivo ?? (????) in situ ??

12. Permanent dentition

14. Caries

15. Clinical Appearance

16. Characteristics ??????????????????????????,????????????????�..?,????,??????????????,???,??????,????;??????????,??????,??????,????,???????????????????????????????,???????????????????????????????????,????????????????????????????????????????,????????????????�..?,????,??????????????,???,??????,????;??????????,??????,??????,????,???????????????????????????????,???????????????????????????????????,??????????????

17. Process of caries Demineralization of apatites Decomposition of organic substance Discoloration Disintegration of tooth structure Cavitation

18. Definition Dental caries, or tooth decay, is a pathological process of localized destruction of tooth tissue by microorganisms. It is an irreversible, slowly progressive decay of the hard tissues of individual teeth characterized by demineralization of apatites and decomposition of organic substance which leads to a disintegration of tooth structures and cavitation.

19. Susceptible sites ???????,??????????????????????????? ???????,???????????????????????????

20. ????????????????;??????????,?????????????????????,??????,?????,??????????????????? ????????????????;??????????,?????????????????????,??????,?????,???????????????????

21. Susceptible teeth molar premolar incisor canine ???????????????????????,?????????????????????????????,???????,?????????,??????? ???????????????????????,?????????????????????????????,???????,?????????,???????

22. Classification Developmental stage ????????????????,?????,????????????? (????)??????????????? ?????????????????;???????,??????????????????,???????,???,????????;????,???????,?????,?????????????,??????????,???????? ????????????????,?????,????????????? (????)??????????????? ?????????????????;???????,??????????????????,???????,???,????????;????,???????,?????,?????????????,??????????,????????

23. Symptom? Irritating/stimulating pain Spontaneous pain

24. Developmental speed Chronic caries Acute caries rampant caries Arrested caries ????????,????���???,??????,??1.5-2??????????????,??????????,????????????;??????????????,???????,?????���,??�..,?????????????,??????,?????? ????????,????���???,??????,??1.5-2??????????????,??????????,????????????;??????????????,???????,?????���,??�..,?????????????,??????,??????

26. Treated or not primary caries secondary caries ?�..??���.?????????????;?????????????????????????????,??????????,???????;??,???????????????,????,??????? ?�..??���.?????????????;?????????????????????????????,??????????,???????;??,???????????????,????,???????

27. Etiology Multi-factorial disease Host: teeth & saliva Microflora Substrate Time

28. Four factors must be acting concurrently Conditions within each of these factors must be favorable : bacteria �� cariogenic substrate �� suitable host ��� susceptible time ��� sufficient

32. Biological basis of Operative Dentistry

33. Dentinogenesis Primary dentinogenesis Secondary dentinogenesis Tertiary dentinogenesis Reactionary dentinogenesis Reparative dentinogenesis

34. Dentinogenesis Primary dentinogenesis before completion of root formation Secondary dentinogenesis after completion of root formation Tertiary dentinogenesis at specific foci in the tooth in response to various stimuli

35. Dentine matrix secreted by surviving odontoblasts in response to an appropriate stimulus.

37. Dentine matrix secreted by a new generation of odontoblast-like cells in response to an appropriate stimulus, after the death of the original odontoblasts.

39. Operative Dentistry

40. Cavity Classification I: Beginning in pits and fissures. II: Beginning in the proximal surfaces of the premolars and molars. III: Beginning in the proximal surfaces of the incisors and canines. IV: Beginning in the proximal surfaces of the incisors and canines and involving the incisal angle. V: Beginning in the gingival third of the labial, buccal or lingual surfaces.

41. Fundamental Principles Removal of the caries lesion clearly Conservation of the health dentine APAC Protection of the dental pulp APAC

42. Cavity preparation Procedures 1. Gain access and obtain outline form 2. Obtain the required resistance form 3. Obtain the required retention form 4. Obtain the required convenience form 5. Remove any remaining caries dentine 6. Finish the enamel walls and margins 7. Perform cavity cleansing and medication

44. A synthetic enamel for rapid tooth repair Seamless fixing of an early caries lesion can be achieved without prior excavation.

49. SEM photograph of longitudinal section of paste-treated tooth after 10,000 times of brushing. Loss of re-grown layer by brushing is less than 10 %.

50. Self-assembling peptide scaffolds promote enamel remineralization

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