Inlays and onlays

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