DENT 5102, Fall 2007

Unit 2. Restorative Materials

Unit 3. Dental Caries

Restorative Materials

• According to radiographic density beginning with most radiopaque

• Group I. Gold alloys, amalgam,silver• Group II. Gutta percha, zinc

oxyphosphate or other base materials, composite with opacifier, rubber base impression material, calcium hydroxide with opacifier

Restorative Materials (Cont.)

• Group III. Porcelain

• Group IV. Radiolucent. Calcium hydroxide, composite, resin

Radiographic Interpretation of Dental Caries

Unit 3

Severity of Caries

• Early, incipient (1st degree)

• Moderate (2nd degree)

• Advanced (3rd degree)

• Extensive (4th degree)

Caries Progression

Location of Caries

• Occlusal, incisal

• Proximal

• Lingual, palatal

• Facial

• Cemental

• Recurrent

Incipient Caries

Occlusal Caries

Occlusal Caries

Proximal Caries

Proximal Caries

Proximal Caries

Cemental Caries

Recurrent Caries

• Caries immediately next to a restoration

• Inadequate margins or excavation

• Pulpal necrosis

• Metallic restorations often hide

• Clinical examination

Recurrent Caries

Recurrent Caries

Adumbration (Cervical Burnout)

Occlusal Caries

Adumbration

Adumbration

• Between CEJ and alveolar crest

• Diffuse radiolucency

• Ill-defined borders

• Presence of the edge of root

• Clinical evaluation

Adumbration

Caries: Xerostomia

• Therapeutic radiation

• Xerostomia

• Sjogren’s syndrome

• Caries begins at cervical region

• Extensive decay

Rampant Caries

• Children

• Poor dietary habits

• Extensive caries

• Proximal and smooth surface

• Socio-economic factors

Rampant Caries

Rampant Caries

Factors In Caries Diagnosis

• Location of the tooth

• Surface involved

• Size of the carious lesion

• Restoration, material

• X-ray beam angulation

• Film placement

Factors In Caries Diagnosis

• Film type

• Developer solution – age

• kVp

• mAs

• Room lighting

• Observer