Anatomy of pulp chamber
-
Upload
karishma-ashok -
Category
Health & Medicine
-
view
1.306 -
download
1
Transcript of Anatomy of pulp chamber
![Page 1: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/1.jpg)
BY: KARISHMA ASHOK
ROLL NO: 33IV/I
ANATOMY OF PULP CAVITY
![Page 2: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/2.jpg)
INTRODUCTION
For the success of an endodontic therapy, the knowledge of pulp anatomy cannot be ruled out. It is essential to have kbowledge about normal configuration of pulp cavity and its variations.
As the external morphology of the tooth changes, so does the internal morphology.
![Page 3: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/3.jpg)
PULP CAVITY
The pulp cavity is the central cavity within a tooth and is entirely enclosed by dentin except at apical foramen.
It is divided into: 1. Coronal portion pulp chamber2. Radicular portion root canal
![Page 4: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/4.jpg)
PULP CHAMBER
Occupies the coronal portion of pulp cavity.In anterior teeth, the pulp chamber gradually
merges into the root canal and the division becomes indistinct.
In multi-rooted tooth, pulp cavity consists of a single pulp chamber and usually 3 or more root canals.
ROOF OF PULP CAVITY: consists of dentin covering the pulp chamber occlussaly or incisally.
![Page 5: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/5.jpg)
PULP HORN : Accentuation of the roof of pulp chamber directly under a cusp or developmental lobe.
FLOOR OF PULP CHAMBER: runs parallel to the roof and consists of dentin bounding the pulp chamber near cervical area of tooth, particularly dentin forming the furcation area.
![Page 6: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/6.jpg)
CANAL ORIFICES: openings in the floor of pulp chamber leading to the root canals.
They are not separate structures but are continuous with the pulp chamber and root canals
![Page 7: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/7.jpg)
ISTHMUS
“A narrow passage or anatomic part connecting two larger structures (root canals) “
Identified using METHYLENE BLUE DYE
Contains pulp or pulpally derived tissue and acts as store house for bacteria
Therfore should be well prepared and filed
![Page 8: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/8.jpg)
Hsu n Kin 1997 classified isthmus as:
Type I
Type II
Type III Type IV
![Page 9: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/9.jpg)
ROOT CANALS
“Portion of the pulp cavity from the canal orifice to the apical foramen”Parts:Apical constriction (minor diameter)Apical foramen (major diameter)Cemento-dentinal junctionAccessory canalsLateral canals
![Page 10: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/10.jpg)
CLASSIFICATIONS
VERTUCCI’S CLASSIFICATION:
1. Type I: 1 canal extends from the pulp chamber to apex. (1)
2. Type II: 2 separate canals leave the pulp chamber and join short of apex to form 1 canal(2-1)
3. Type III: 1 canal leaves the pulp chamber and divides into 2 roots; the two then merge to exit as 1 canal. (1-2-1)
![Page 11: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/11.jpg)
4. Type IV: 2 separate distinct canals extend from the pulp chamber to apex. (2)
5. Type V: 1 canal exits the pulp chamber and divides short of the apex into 2 separate canals with separate apical foramina. (1-2)
6. Type VI: 2 separate canals leave the pulp chamber, merge in the body of root and redivide short of apex to exit as 2 distinct canals. (2-1-2)
![Page 12: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/12.jpg)
7. Type VII: 1 canal leaves the pulp chamber, divides and then rejoins in the body of root and finally redivides into 2 distinct canals short of the apex.
(1-2-1-2)
8. Type VIII: 3 separate distinct canals extend from pulp chamber to apex (3)
![Page 13: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/13.jpg)
![Page 14: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/14.jpg)
WEINE’S CLASSIFICATION
Type I:
Type II:
Type III:
Type IV:
![Page 15: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/15.jpg)
Classification of C-shaped canals
1. Melton’s classification
I- C shaped outline without seperation
II- Semicolon (;) shaped with distinct mesial canal
III- two or more discrete canals
![Page 16: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/16.jpg)
2. Fan’s classificationI- C shaped outline without seperationII- Semicolon (;) shaped with distinct mesial canal
(but α or β >60 )III- two or more discrete canals
(but α or β <60 )IV- only 1 oval canalV- no canal could be observed
(usually near the apex)
![Page 17: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/17.jpg)
![Page 18: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/18.jpg)
METHODS OF DETERMINING PULP ANATOMY
1. CLINICAL METHODSI. Anatomy studiesII. RadiographsIII. ExplorationsIV. High resolution compound tomographyV. Visualisation endogramVI. Fiberoptic endoscopeVII. Magnetic resonance imaging
![Page 19: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/19.jpg)
2. IN VITRO METHODSi. sectioning of teethii. use of dyesiii. Contrasting mediaiv. Scanning electron microscope analysis
![Page 20: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/20.jpg)
VARIATIONS IN INTERNAL ANATOMY
Variations in developmenti. Geminationii. Fusion iii. Concrescenceiv. Taurodontismv. Talon’s cuspvi. Dilacerationvii. Extra root canalviii. Dens invaginatusix. Dens evaginatus
![Page 21: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/21.jpg)
![Page 22: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/22.jpg)
![Page 23: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/23.jpg)
In most cases, the number of root canals corresponds with the number of roots.Sometimes there may be an additional canal:1. Mesial root of mandibular 1 molar almost
always has 2 canals2. Distal root of mandibular 1 molar,
ocassionally has 2 canals3. Mesiobuccal root of maxillary 1 molar has
frequently 2 canals4. Mandibular premolar may have 2 canals
![Page 24: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/24.jpg)
Variation in shape1. Gradual curve2. Apical curve3. C-shaped4. Bayonet shaped5. Sickle shaped
![Page 25: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/25.jpg)
Variations because of pathology1. Pulp stones2. Internal resorption3. External resorption
![Page 26: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/26.jpg)
Variations in apical third
A. Different position of apical foramen
B. Open apex
![Page 27: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/27.jpg)
C. Lateral and accessory canals
![Page 28: Anatomy of pulp chamber](https://reader036.fdocuments.in/reader036/viewer/2022062412/58a744ef1a28ab01548b499d/html5/thumbnails/28.jpg)