pediatrics dentistry.pptx(It is about pulp canal morphology of deciduous teeth)

Primary root canal morphology of deciduous teeth

1. School of Dental Sciences, CMCTH (Department of pedodontics and preventive dentistry ) Primary root Canal morphology Guided by: Dr Bidhya Thapaliya Dr Anshuman Tripathi Presented by: Ramkrishna Kushwaha Roll no. 23 BDS 9 th Batch

2. Contents General Anatomy of pulp cavity General features of pulp cavity of deciduous teeth Deciduous incisors Deciduous canine Deciduous molars

3. Primary teeth

4. General anatomy of pulp cavity

5. Introduction Maintenance of pediatric dental integrity is important for ensuring : Correct tooth spacing Mastication Phonation Esthetics

6. Prevention of psychological effect due to tooth loss Roots of primary teeth formed completely 16-20 months Form and shape of root canal = form and shape of external anatomy of deciduous teeth( Roughly) To clean the root canal of infected teeth (main goal) To visualize the pulp cavity during treatment

7. General features of pulp cavity of deciduous teeth Smaller depth of dentin, thin enamel Highly projecting pulp horns Pulp chamber (larger) No clearly defined root canal entrances Long root canals, diverge greatly

8. Difference between the pulp chamber of primary teeth and permanent teeth

9. Difference between primary pulp and permanent pulp cavity Primary teeth Pulp chamber larger Root canals more ribbon like (hour glass appearance) Pulp horns are more prominent Cellularity and vascularity high, Accessory canal present Permanent teeth Pulp chamber smaller Well defined with less branching Less prominent Less degree, may be absent

10. Deciduous incisors Fan shaped Thin enamel Pulp horns are less pointed Wedge shaped labiolingually (pulp chambers) Root canal (wide)

11. Wide apical foramen Only one root canal with oval cross section Apical third of root canal (perforated by accessory canal)

12. Maxillary central incisor Exterior form of teeth Three smaller projection on it incisal border No distinct constriction at its junction with pulp canal Round shape to slight labiolingual compression

13. Maxillary lateral incisor The pulp morphology is similar to that of the central incisor, but there is generally a demarcation between the pulp chamber and the pulp can al

14. Mandibular central incisor The pulp chamber conforms to the external anatomy of the crown , and there is usually a definite constriction between the pulp chamber and the pulp canal. The pulp canal tapers evenly toward the apex

15. Mandibular lateral incisor The pulp chamber and canal generally conform to the external morphology of the tooth. There is no constriction between the pulp chamber and pulp canal such as that found in the mandibular central incisor

16. Deciduous canine Pulp chamber similar to deciduous incisors Single pulp horns Entire pulp cavity tapers from roof of pulp chamber to the root apex No constriction between pulp chambers and root canal

17. In cross section ,the apical canal appears Flattened on the mesial Slightly oval shape on distal side Longer root canal Many small accessory apical canal Thin layer of dentin

18. Maxillary canine Pulp morphology shows three projections at the incisal aspect of the pulp chamber; the central is the largest and longest , followed by the distal and mesial projections. There is little demarcation between the pulp chamber and the root canal, which tapers evenly as it approaches the apex

19. Mandibular canine The pulp morphology conforms to the external morphology of the tooth, with no demarcation between the pulp chamber and pulp canal

20. Deciduous molars The pulp chambers are large(mandibular second molars) The enamel and dentin walls are thin The distance between enamel surface and pulp horns is sometimes as little as 2mm. Special Eastman’s burs are advised for preparation of cavities No. of pulp horns is equal to no. of cusp, root canals ribbon like

21. Maxillary first molar The coronal pulp morphology is similar to the external form. There are generally three pulp horns; the mesiobuccal is the largest , followed by mesiolingual and the distobuccal. There are three pulp canals corresponding to the three roots . According to Hibbard and Ireland and Barker variations from this basic pulp canal anatomy are fairly common. The most frequently found are anastomoses and branching in the apical region , often connecting the lingual and distobuccal pulp canals

22. Maxillary second molar The pulp morphology shows a pulp chamber that conforms to the external contours of the crown. There is one pulp horn corresponding to each cusp; the mesiobuccal is the largest, followed by the mesiolingual, distobuccal, and distolingual. The pulp canals do not show a high incidence of branching and anastomosing such as is seen in the maxillary first primary molar

23. Mandibular first molar The pulp chamber is typical, with four pulp horns, the mesiobuccal the largest and longest. There are generally three pulp canals—distal, mesiobuccal and mesiolingual. The two mesial canals generally extend from the chamber separately or in a ribbon shape but usually become more confluent via branching and anastomosing as they approach the apex

24. Mandibular second molars The pulp morphology generally shows a pulp chamber with five pulp horns and three pulp canals . The mesiobuccal and mesiolingual pulp horns are the largest and longest. The mesiobuccal and mesiolingual pulp canals are usually confluent and ribbon-shaped as they leave the chamber but divide into separate canals with occasional branching as they approach the apex

25. References Textbook of Pediatric Dentistry , Nikhil Marwah 4 th Edition

26. Thank you