Composites and Urinary Bisphenol-A Study (CUBS)

This study has been completed.
Harvard School of Public Health
Information provided by (Responsible Party):
New England Research Institutes Identifier:
First received: November 16, 2011
Last updated: March 19, 2015
Last verified: March 2015

The Composites and Urinary Bisphenol-A Study (CUBS) is a clinical study of dental composite for its effects on urinary bisphenol-A levels. The study will enroll approximately 139 children recruited from study-affiliated clinical sites in New England.The primary aim of CUBS is to test the hypothesis that urinary bisphenol-A (BPA) concentrations increase after composite restoration placement. BPA is a chemical used in the synthesis of matrix monomers and has been shown to have harmful effects in toxicological studies in laboratory animals. Currently it is unknown whether dental composite restorative materials containing monomers that are derived from BPA result in chronic low-dose BPA exposure in children.

Condition Intervention
Dental Caries
Procedure: Restoration of dental caries with dental composite

Study Type: Interventional
Study Design: Endpoint Classification: Pharmacokinetics Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Health Effects of Dental Composites in Children

Resource links provided by NLM:

Further study details as provided by New England Research Institutes:

Primary Outcome Measures:
  • Change from baseline in urinary bisphenol A level and 1 day [ Time Frame: Baseline and 1 day ] [ Designated as safety issue: No ]
  • Change from baseline in urinary bisphenol A level and 14 days [ Time Frame: Baseline and 14 days ] [ Designated as safety issue: No ]
  • Change from baseline in urinary bisphenol A level and 6 months [ Time Frame: Baseline and 6 months ] [ Designated as safety issue: Yes ]

Enrollment: 116
Study Start Date: December 2011
Study Completion Date: June 2014
Primary Completion Date: June 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Composite Procedure: Restoration of dental caries with dental composite
Dental Resin Restoration (bisphenol A diglycidylether methacrylate based composite)
Other Name: Composite to be used is Z100 by 3M ESPE (St Paul, MN, USA).

Detailed Description:

Study subjects will be new or existing patients of the clinical sites who are in need of dental restorations, meet all eligibility criteria, and provide informed consent/assent to participate. Subjects will be asked to provide two pre-treatment urine samples and three post-treatment samples. Urine collections occur next-day and 14 days after treatment, with one final urine collected approximately 6 months later (marking the end of the subject's active study participation). Data will be collected from the clinician's standard oral examination (including new and existing dental treatments), the data collector's measurements of height and weight and interviews administered to the parents/guardians to assess sociodemographic and other relevant factors (e.g., recent food/beverage consumption). Confidentiality will be maintained by assigning each subject a unique number and using only this number or aggregate data in all study reports. All study records will be securely maintained with access limited to essential study personnel only.


Ages Eligible for Study:   3 Years to 17 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Aged 3-16 (<17) years at enrollment.
  • 2+ posterior teeth with caries requiring restorations treatable by composite.
  • Toilet-trained (not using diapers, pull-ups, or training pants during day or night).

Exclusion Criteria:

  • Medical conditions that would render the subject physically unable to provide urine samples.
  • Guardian is not proficient in spoken English or Spanish language
  • Child is aged 8.0 years or older and not proficient in spoken English or Spanish language
  • Living >35 miles outside of the dental clinic or the NERI office (Watertown MA)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01484132

United States, Massachusetts
New England Research Institutes, Inc.
Watertown, Massachusetts, United States, 02472
Sponsors and Collaborators
New England Research Institutes
Harvard School of Public Health
Principal Investigator: Sonja McKinlay, PhD New England Research Institutes
  More Information

No publications provided

Responsible Party: New England Research Institutes Identifier: NCT01484132     History of Changes
Other Study ID Numbers: 1R01ES019155
Study First Received: November 16, 2011
Last Updated: March 19, 2015
Health Authority: United States: Institutional Review Board

Keywords provided by New England Research Institutes:
Dental Caries
Dental Restorative Materials
Dental Composite

Additional relevant MeSH terms:
Dental Caries
Stomatognathic Diseases
Tooth Demineralization
Tooth Diseases
Bisphenol A
Estrogens, Non-Steroidal
Free Radical Scavengers
Hormones, Hormone Substitutes, and Hormone Antagonists
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Physiological Effects of Drugs
Protective Agents processed this record on July 01, 2015