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Filling a back tooth with composite is normally done in layers, two millimetres at a time, because the curing light only reaches so far and the material shrinks as it sets. Bulk-fill composites are sold on the promise that the whole cavity can be filled in one go: faster for the dentist, shorter for the patient, one fewer step to get wrong. The question is whether the filling lasts as long. Shrinkage stress, incomplete curing deep in the cavity and gaps at the margin are the reasons to be careful, and none of them show up on the day. They show up after years in a mouth that chews. Twenty-two randomised trials have been published on this since 2023, and the one review covering the question predates most of them. This project is the update: the same question, carrying the trials that have appeared since, and saying plainly what they change. It suits someone who wants to learn how evidence is appraised and pooled, and it ends with a paper submitted.
Read up on composite restorations and why bulk-fill materials are debated. Help run the search, screen the trials, extract the failure and sensitivity outcomes, and write a section of the paper.
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