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Dental Nation
Material guide

ORMOCER

ORMOCER composites were developed to reduce clinical time or contraction stress at the tooth-restoration interface.

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The short answer

ORMOCER composites were introduced to reduce clinical time or contraction stress at the tooth-restoration interface.

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ORMOCER dental educational illustration

What is an ORMOCER composite?

Properties examined for ORMOCER composites
PropertyHow it has been examined
Polymer conversionThe degree of conversion has been measured with infrared spectroscopy.[5][3]
Mechanical behaviourFlexural strength, elastic modulus and hardness were measured after dry and ethanol storage.[5][3]

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Which properties are examined?

Studies examine conversion and crosslinking, as well as flexural strength, elastic modulus and hardness. They also assess mechanical and hydrolytic degradation in an ORMOCER-based Bis-GMA-free resin composite.

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Where is ORMOCER used?

ORMOCER has been studied in restorative dentistry and in posterior restorations. Clinical comparisons include ORMOCER-based and conventional methacrylate-based resin composites in those restorations.

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What materials is it compared with?

Research compares ORMOCER composites with bulk-fill, monochromatic and conventional composites. Conventional methacrylate-based resin composite is also the clinical comparator in posterior restoration evidence.

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Why is interface stress considered?

Contraction stress occurs at the interface between the tooth and its restoration. The material category was introduced with the aim of reducing that stress, alongside reducing clinical time.

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What has been measured in clinical follow-up?

Clinical studies of ORMOCER posterior restorations assess marginal adaptation, retention and fracture at follow-up intervals from 6 to 36 months. One clinical trial also recorded postoperative hypersensitivity and restoration losses after 12 months.

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Clinical outcomes assessed in ORMOCER research
OutcomeAssessment period or measure
Marginal adaptation, retention and fractureThese outcomes were assessed across 6-, 12-, 24- and 36-month intervals.[1][2][3][4][5][6]
Postoperative hypersensitivityIt was reported after fillings in a one-year clinical trial.[1][2][3][4][5][6]

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Frequently asked questions

What is ORMOCER compared with in posterior restorations?

ORMOCER-based composite is compared with conventional methacrylate-based resin composite, while other studies compare it with bulk-fill and monochromatic composites.

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