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Pinch forces and instrument tip forces during periodontal scaling.

Authors
Dong-H; Loomer-P; Villanueva-A; Rempel-D
Source
J Periodontol 2007 Jan; 78(1):97-103
NIOSHTIC No.
20037270
Abstract
BACKGROUND: The prevalence of upper-extremity musculoskeletal disorders, such as tendinitis, is elevated among dental practitioners. An important risk factor for these disorders is forceful pinching; however, the pinch forces and instrument forces during scaling are unknown. METHODS: Six dentists and six senior-year dental students were recruited to use an instrumented periodontal scaler to perform their usual dental scaling work on patients. Thumb pinch force was measured by a pressure sensor, whereas the forces developed at the instrument tip were measured by a six-axis load cell. RESULTS: Dental students applied greater mean peak pinch force (35.7 +/- 3.8 N) compared to dentists (24.5 +/- 4.1 N) (P = 0.001). On the other hand, the peak forces generated at the instrument tip, which were directly related to the productivity of the dental scaling task, were higher among the dentists. The application of pinch force by dentists was related to the required scaling forces, whereas students applied excessive pinch force to the tools. CONCLUSIONS: Increased experience in periodontal scaling leads to the application of less pinch force to accomplish scaling. Nonetheless, the applied peak pinch forces in both groups are high and may pose a risk for the development of musculoskeletal disorders of the distal upper extremity.
Keywords
Biological-effects; Biological-function; Biomechanical-engineering; Biomechanics; Cell-biology; Cellular-reactions; Dentistry; Dentists; Exposure-assessment; Exposure-levels; Exposure-methods; Hand-injuries; Hand-tools; Injury-prevention; Mechanics; Musculoskeletal-system; Musculoskeletal-system-disorders; Occupational-exposure; Occupational-hazards; Physiological-effects; Physiological-measurements; Physiological-response; Quantitative-analysis; Repetitive-work; Risk-analysis; Risk-factors; Statistical-analysis; Training; Work-environment; Work-operations; Work-performance; Workplace-studies; Work-practices; Author Keywords: Dental scaling; ergonomics; tendinitis
Contact
Dr. David Rempel, Department of Medicine, University of California, San Francisco, 1301 South 46th Street, Building 163, Richmond, CA 94804
Publication Date
20070101
Document Type
Journal Article
Email Address
david.rempel@ucsf.edu
Funding Type
Grant
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008429
Issue of Publication
1
ISSN
0022-3492
Source Name
Journal of Periodontology
State
CA
Performing Organization
University of California, Berkeley
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