Reem hussam dentin

28
Dentin

Transcript of Reem hussam dentin

Page 1: Reem hussam   dentin

Dentin

Page 2: Reem hussam   dentin

Topics

Formation of New Dentin

Pain and pulp-dentin complex

Clinical Consideration

Page 3: Reem hussam   dentin

Formation of New DentinTypes of Dentin

Primary Secondary Tertiary

Reactionary

Reparative

Page 4: Reem hussam   dentin

Secondary Dentin• Cause: Aging• Develops after Root

Formation is completed.• On entire pulpal surface• The deposition is continuous

with primary but:i)slowerii)Fewer tubulesiii)Tubules change direction to a more wavy course

• In multi-rooted teeth, it’s thicker on the roof and floor of pulp chamber

Page 5: Reem hussam   dentin
Page 6: Reem hussam   dentin

Tertiary Dentin • Forms at a localized area in reaction

to a stimulus• Dentinal tubules less in number and

irregular arrangement• There are 2 types of Tertiary Dentine

Page 7: Reem hussam   dentin
Page 8: Reem hussam   dentin

Types of Tertiary DentinReactionary

Pre-existing odontoblast

Reparative

Newly differentiated ectomesnchymal cells

Page 9: Reem hussam   dentin

Reactionary

Reparative

Page 10: Reem hussam   dentin

Reactionary

Reparative

Reactionary dentin

Page 11: Reem hussam   dentin

Types of Reparative dentine

Page 12: Reem hussam   dentin

Topics

Formation of New Dentin

Pain and pulp-dentin complex

Clinical Consideration

Page 13: Reem hussam   dentin
Page 14: Reem hussam   dentin
Page 15: Reem hussam   dentin
Page 16: Reem hussam   dentin

Innervation of Dentin

• Subodontoplastic plexus of Raschkow

• The nerve will loose its mylien sheath then pass between the odontoblasts bodies and enter the dentinal tubules

Page 17: Reem hussam   dentin
Page 18: Reem hussam   dentin
Page 19: Reem hussam   dentin
Page 20: Reem hussam   dentin

Topics

Formation of New Dentin

Pain and pulp-dentin complex

Clinical Consideration

Page 21: Reem hussam   dentin

Clinical considerations

1. Permeability of dentin2. Response to external stimuli3. Adhesion of dental materials to dentin4. Endodontics5. Sensitivity6. Forensic Dentistry

Page 22: Reem hussam   dentin

Permeability of DentinDepends on:

Dentin surface(exposed by)

Caries

Attrition

Abrasion

trauma

Tubules(patent or occluded)

Exogenous material

Intertubular dentin

Tertiary Dentin

Page 23: Reem hussam   dentin

Adhesion of Dental materials to dentin

Page 24: Reem hussam   dentin

Endodontics• With age, secondary

and tertiary dentin are formed causing obliteration to the pulp chamber and root canal

• Treatment and prognosis in older patients is less effective

Page 25: Reem hussam   dentin

Sensitivity

• Reduction of sensitivity by occluding patent dentinal tubules by precipitation of crystalline oxalates

Page 26: Reem hussam   dentin

Forensic Dentistry• Dry teeth of

unknown dead body contain mitochondrial DNA of the interatubular nerve which are protected within the tubules could help in identification of the dead body.

Page 27: Reem hussam   dentin

Topics

Formation of New Dentin

Pain and pulp-dentin complex

Clinical Consideration

Page 28: Reem hussam   dentin

• Made by: Reem Hussam (83) Section 2