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What is In the conventional Class I composite preparation, retention is achieved by which of the following features?
1. Occlusal convergence
2. Occlusal bevel
3. Bonding
4. Retention grooves and explain in detail?
Typically, the Class I composite preparation has occlusally converging walls that provide primary retention form. The actual bonding also provides retention form. However, an occlusal bevel is not indicated on Class I preparations nor are retention grooves used.