الاغلب سألني عن كيفية تحضير
"الحشوات السيراميكية/Onlay"
بهذا الثريد راح احاول اختصرها
لطلبة الاسنان ربي يوفقكم 💐
Indication
If the width is more than 1/3 of
Inter-Cuspal distance
Ex. Tip2tip =5 and cavity =4
Then we go for indirect restoration
+ if we cover a cusp is Onlay
"الحشوات السيراميكية/Onlay"
بهذا الثريد راح احاول اختصرها
لطلبة الاسنان ربي يوفقكم 💐
Indication
If the width is more than 1/3 of
Inter-Cuspal distance
Ex. Tip2tip =5 and cavity =4
Then we go for indirect restoration
+ if we cover a cusp is Onlay
1️⃣Place depth grooves on the occlusal surface, develop axial surfaces, and establish the traditional outline form with a No. 1157 carbide bur.
2️⃣Remove existing restorations and excavate caries.
(Fig. 1, Fig. 2, Fig. 3)
2️⃣Remove existing restorations and excavate caries.
(Fig. 1, Fig. 2, Fig. 3)
3️⃣ Place the retentive grooves in 3⁄4 crowns and prepare proximal boxes and occlusal offset for onlays with the use of a No. 170 L carbide bur. (Fig.4)
4️⃣ Prepare the gingival bevel, buccal and lingual flares, and occlusal offset with the No. 282-010 bur. (Fig. 5)
4️⃣ Prepare the gingival bevel, buccal and lingual flares, and occlusal offset with the No. 282-010 bur. (Fig. 5)
5️⃣Use a fine disk on the proximal aspect of the preparation to finish the flares and slight hollowing that develop during use of the No. 282-010 bur.
6️⃣Define the proximal box and refine the reverse gingival bench
7️⃣Make impressions and pour casts of the prepared onlay (Fig. 6)
6️⃣Define the proximal box and refine the reverse gingival bench
7️⃣Make impressions and pour casts of the prepared onlay (Fig. 6)
8️⃣ Esthetic onlay, Cavity walls are flared 5 degrees to 15 degrees in total(10 degrees to 12 degrees ideal), and the gingival floor prepared with a butt joint.
9️⃣ The internal line angles are rounded, the minimum isthmus width is 2 mm, and the minimum depth thickness is 1.5 mm.
9️⃣ The internal line angles are rounded, the minimum isthmus width is 2 mm, and the minimum depth thickness is 1.5 mm.
🔟 Try the castings on the tooth, adjust the proximal contacts, evaluate occlusal relationship, and cement the casting. Use fine garnets to finish the exposed margins. After the complete set of the cement, review the occlusal surface again.
@rsb_al thank you so much 🌹💐
@rsb_al thank you so much 🌹💐
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