What do systematic reviews say?

Preformed crown (any material; conventional technique or Hall Technique) vs Filling (any material; with or without complete carious tissue excavation; with or without pulp treatment)

The review found no eligible studies for this question.

• Preformed crowns for decayed primary molar teeth 2015 · Cochrane All outcomes
  Satisfaction with treatment: listed in the Summary of findings table with no data; the studies did not measure this outcome.
  0 studies
  No studies found