Effect of Tool Design on Hand Pain in Dental Practitioners

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
University of California, San Francisco
ClinicalTrials.gov Identifier:
NCT01332760
First received: April 6, 2011
Last updated: February 21, 2012
Last verified: February 2012
  Purpose

Dentists and dental hygienists experience elevated rates of musculoskeletal disorders, such as carpal tunnel syndrome and tendonitis, primarily due to the high pinch force required for dental scaling. There is evidence that a lighter and larger diameter tool can significantly reduce the pinch force. This randomized controlled study will determine if dentists or dental hygienists who use such a tool report less hand and arm pain compared to those who continue to use the conventional tool design.


Condition Intervention
Shoulder Pain
Other: narrow diameter heavy dental tool
Other: large diameter light weight tool

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Effect of Tool Design on Hand Pain in Dental Practitioners

Further study details as provided by University of California, San Francisco:

Primary Outcome Measures:
  • change from baseline in right shoulder pain score at 4 months [ Time Frame: 4 months after intervention ] [ Designated as safety issue: No ]
    peak pain assessed on 0-10 scale using end of week questionnaire

  • Change from baseline in right elbow pain at 4 months [ Time Frame: 4 months after intervention ] [ Designated as safety issue: No ]
    peak pain assessed on 0-10 scale using end of week questionnaire

  • change from baseline in right wrist pain at 4 months [ Time Frame: 4 months after intervention ] [ Designated as safety issue: No ]
    peak pain assessed on 0-10 scale using end of week questionnaire


Secondary Outcome Measures:
  • change in pain medication usage [ Time Frame: pre-intervention compared to post intervention ] [ Designated as safety issue: No ]
    mean number of days using medications for upper extremity pain before the intervention compared to after the intervention

  • change in nights per week waken from sleep due to finger numbness [ Time Frame: pre-intervention compared to post intervention ] [ Designated as safety issue: No ]
    Mean number of nights waken from sleep with burning, numbness or tingling in the right thumb, index or middle fingers during the pre-intervention period compared to the post-intervention period.


Enrollment: 110
Study Start Date: April 2009
Study Completion Date: March 2011
Primary Completion Date: March 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: narrow diameter heavy dental tool
periodontal tools for dental scaling and cleaning provided that have a narrow diameter (8mm) made of heavy material (steel).
Other: narrow diameter heavy dental tool
8mm diameter, heavy periodontal tool made from steel
Other Name: traditional tool
Experimental: light large diameter dental tool
periodontal tools for scaling and tooth cleaning provided with large diameter (11mm) handle made of light weight material
Other: large diameter light weight tool
Periodontal tools (4-8) provided to dental practitioners to use for all dental scaling or cleaning. This tool handle diameter is 11 mm diameter and it is made from lightweight Delrin.
Other Name: intervention tool

  Show Detailed Description

  Eligibility

Ages Eligible for Study:   18 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • dentists and dental hygienists from the San Francisco Bay Area
  • dental practitioners who perform more than 10 hours of dental hygiene work per week
  • dental practitioners who have been performing dental hygiene work for more than 1 year

Exclusion Criteria:

  • not currently under a physician's care for treatment of an upper extremity disorder
  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 ClinicalTrials.gov identifier: NCT01332760

Locations
United States, California
UCSF Ergonomics Program
Richmond, California, United States, 94804
Sponsors and Collaborators
University of California, San Francisco
Investigators
Principal Investigator: David Rempel, MD, MPH University of California, San Francisco
  More Information

No publications provided

Responsible Party: University of California, San Francisco
ClinicalTrials.gov Identifier: NCT01332760     History of Changes
Other Study ID Numbers: H5534-32614, R01OH008892
Study First Received: April 6, 2011
Last Updated: February 21, 2012
Health Authority: United States: Institutional Review Board

Keywords provided by University of California, San Francisco:
ergonomics
workplace
occupational
tool
dental
dentist

Additional relevant MeSH terms:
Shoulder Pain
Arthralgia
Joint Diseases
Musculoskeletal Diseases
Pain
Signs and Symptoms

ClinicalTrials.gov processed this record on August 21, 2014