A brief description about inlays and onlays

1. Inlays & Onlays
Dr. Yumna
Lecturer
Dental Hygiene & Technology

2. Inlay
• It is defined as a restoration which has
been constructed out of he mouth from
gold, porcelain or any other metal an then
cemented on the prepared cavity of the
tooth

3. Inlays

4. Onlay
• An onlay is
essentially an inlay
which covers one or
more cusps an
adjoining occlusal
surface of the tooth

5. Onlay

6. Indirect Restorations
• Cast Metals
– High Gold Alloys
– Low Gold Alloys
– Palladium Silver Alloys
– Base Metal Alloys

7. Indirect Restorations
• Tooth Colored
– Composite
– Porcelain

8. Indications
• Large restorations
• Endodontically treated teeth
• Dental rehabilitation with cast metals
• Diastema closure
• Occlusal plan correction
• Removable prosthodontic abutment

9. Contraindications
• High caries rate
• Young patient
• Esthetics
• Small restorations

10. Advantages
• Strength
• Biocompatibility
• Low wear
• Control of contours

11. Disadvantages
• Number of appointments
• Higher chair time
• Cost
• Technique sensitive
• Splitting forces

12. Tooth Preparations

13. Flare
Margins
No
Undercuts

14. Tooth Preparations

15. • Margins of the tooth
should be bevelled so
that no enamel weak
point is remained
Tooth Preparations

16. Tooth Preparations
• Additional Retention Features:
– Dovetails
– Grooves
– Slots