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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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Preformed crowns for decayed primary molar teeth.

Nicola P T Innes¹, David Ricketts, Lee Yee Chong

¹Dundee Dental School, University of Dundee, Park Place, Dundee, Tayside, UK, DD1 4HN.

The Cochrane Database of Systematic Reviews

|January 1, 2016

Summary

This summary is machine-generated.

Preformed crowns for primary molars significantly reduce long-term failure and pain compared to fillings. The Hall Technique crowns offer less discomfort during treatment, though evidence for other comparisons is limited.

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Area of Science:

Pediatric Dentistry
Restorative Dentistry
Caries Management

Background:

Preformed crowns (stainless steel or aesthetic) are used for primary molars with decay or developmental defects.
Conventional fitting involves tooth preparation and local anesthetic; the Hall Technique uses preformed metal crowns (PMCs) without these.
Crowns are recommended for pulp-treated, extensively decayed, or broken-down primary molars, but clinical use is limited.

Purpose of the Study:

To evaluate the clinical effectiveness and safety of preformed crowns for primary teeth restorations.
To compare crowns against conventional fillings, other crown types, non-restorative treatments, or no treatment.
To explore if decay extent impacts outcomes when comparing preformed crowns to conventional fillings.

Main Methods:

Systematic review of randomized controlled trials (RCTs) comparing preformed crowns with other interventions for primary molar decay.
Searched multiple databases (Cochrane, MEDLINE, EMBASE) and trial registries up to January 2015.
Included studies reporting outcomes at least six months post-intervention, excluding immediate pain/discomfort.

Main Results:

Moderate evidence suggests crowns (including Hall Technique) have lower long-term failure and pain risk than fillings.
Hall Technique crowns showed reduced treatment discomfort compared to fillings (moderate evidence).
Very low quality evidence exists for crowns vs. non-restorative caries treatment and for metal vs. aesthetic crowns; no RCTs compared Hall Technique vs. conventional fitting.

Conclusions:

Preformed crowns likely reduce long-term failure and pain for primary molars compared to fillings.
Hall Technique crowns may offer reduced procedural discomfort.
Limited evidence exists for other comparisons, and direct comparisons between Hall Technique and conventional crown fitting are lacking.