Laminate veneer.

laminate veneer, types of preparation, steps of preparations.

1. Laminate Veneer Done By : Reham Altayeb Noor abdulrahman Ghadah Sidqi Dalia Fanary Mukhlesah Al drobi

2. Definition The laminate veneer is defined as : Conservative method of restoring the appearance of discolored , pitted or fractured anterior teeth . Consists of bonding thin ceramic laminate veneer on the labial surface of affected teeth .

3. Indications Contraindications Discolored or damaged anterior teeth. High caries index . Poor plaque control. Extensive existing restoration . Bruxism . Advantage s Disadvantages Superior esthetic . Wear and stain resistance . Increased tooth contour Expensive .

4. Fractured anterior teeth Staining anterior teeth Indication

5. indication Diastema Discoloration

6. Contraindication Highly caries index Bruxism

7. The Preparation

8. Types of preparation Type I  called window preparation . (feather in which the veneer is taken up to the height of the incisal edge but the edge, is not reduced). 2. Type II called butt-joint preparation . ( 2 mm incisal reduction without palatal chamfer). Type III  called rab ( 3 – 1 mm incisal reduction with 1 mm height palatal chamfer ).

9. Type I ( window preparation)

10. The reduction must be in : * Gingival third = 0.3 mm . * Middle third = 0.5 mm . * Incisal third = 0.5 mm . Depiction of enamel thickness on thefacial aspect of the tooth

11. A 016 round bur is placed at the tip of the gingival papilla and cuts the cervical margin in a counterclockwise direction. The bur shaft is held in contact with the facial aspect of the tooth 1

12. Using the 016 round bur, the gingival and interproximal margins are placed at the correct depth. 2

13. Using the cutter depth wheels bur, make a series of different depths at various locations of the facial profile of the tooth 3

14. a 018 tapered diamond bur , the unprepared enamel islands are removed to the level of the horizontal depth cuts. The reduction follows the facial contour of the tooth. 4

15. It utilizes minimal tooth preparation mainly confined within enamel. Keeping clear of the gingival margins 5

16. Type II ( Butt joint preparation)

17. In type2 laminate veneers we begin as type I but incisel reduction is involved with a 1.5 to 2 mm (butt joint). 1

18. A 2 mm incisal reduction without palatal chamfer [butt joint] is prepared . The arrows show the level of the incisal depth cuts. The distal depth cut is the most gingivally positioned, followed by the mesial and then the center depth cuts. 2

19. Reducing the incisel edge with a round or flat tapered ended bur. 3

20. The incisal depth cuts are connected creating a uniform reduction that follows the original curvature of the incisal edge. 4

21. Lateral view of prepared tooth 5

22. Type III (wrap around)

23. It restricts angle fractures. When the free edge is not overlaid, the occlusal third of the laminates are very thin ( less than 0.3 mm) and liable to fracture. It enhances esthetic properties of laminates. 1

24. Type III preparation includes labial and palatal reduction which is distinguished from Type I & II . 2

25. 1 mm incisal reduction with 1 mm height palatal chamfer. 3

26. A reduction is reduced with a rounded or flat ended bur. 4

27. Thank You 

28. Thank you Dr. Salah Abdulazim , For each word we learned from you and for all steps of success in this field walk to.