What is the proper cavity preparation for V-shaped cervical erosion lesion to be restored with glass ionomer cement:
- A- Cervical groove, incisal groove.
- B- Cervical groove, incisal bevel.
- C- 4 retention points, 90ْ margin.
- D- No Monday, January 24, 2000 Monday, January 24. 2000 mechanical preparation is necessary.
The proper cavity preparation for a V-shaped cervical erosion lesion to be restored with glass ionomer cement is A. Cervical groove, incisal groove.
Here's why the other options are not ideal:
B. Cervical groove, incisal bevel:
This option could be acceptable, but an incisal groove is generally preferred for additional retention and to optimize the bond of the glass ionomer to the dentin.
C. 4 retention points, 90° margin:
This type of preparation is more suitable for complex restorations, not necessary for a simple erosion lesion. Additionally, using sharp angles with glass ionomer can weaken the material and compromise its longevity.
D. No mechanical preparation is necessary:
While minimal preparation might be used in very superficial cases, some enamel removal through grooves is typically recommended to create a space for the glass ionomer and enhance adhesion.
Therefore, using cervical and incisal grooves provides sufficient retention for most V-shaped cervical erosion lesions while maximizing adhesion and minimizing material weakening.
Please note that the date options seem to be an error and unrelated to the question.
