Ivoclar Vivadent SR Adoro - Manual (Page 12)

12
Onlays
Allow for a preparation of at least 1.5 mm in the area of the fissures, an isthmus width of at least
1.5 mm and provide 1.5 mm space in the area of the cusps. the shoulder may be prepared with a
chamfer (10°–30°) to improve the esthetic appearance of the transition between the composite and the
tooth. onlays are indicated if the preparation margin is less than approximately 0.5 mm away from the
cusp tip, or if the enamel is severely undermined.
1.5
>90°
60°–80°
1.5
1.5
1.5
1.5
10°-30°
Preparation Guidelines and Minimum Layer Thicknesses
As framework-free sR Adoro restorations are placed using an adhesive cementation method, a tooth-
conserving and defect-oriented preparation technique can be used.
Inlays
provide a preparation depth of at least 1.5 mm in the fissure area (central fissure). the isthmus width
should be at least 1.5 mm. the walls of the box should be slightly flared. Round out internal line angles
to enable accurate fit of the inlay. Avoid preparation margins in functional or abrasion surfaces. Avoid
proximal contacts areas. Do not prepare slice-cuts or feather edges.
Adoro
®
–
Practical Procedure
for Framework-Free Restorations
(Inlays/Onlays)
SR