After RCT I want to save front enamel. I don't care about back appearance. Using same core build-up as for a crown, NOT bonding. Why a top onlay weaker than full crown? The enamel takes half the chew force, and onlay takes half. Like two tall buildings cemented together taking pressure from the top. Good flat interior base to pour build-up. Would be half a crown over half a core build-up attached to half a strong tooth. Rod in core now not needed as half tooth is strong and acts like a rod.
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