Prevalence of carpal tunnel syndrome and median mononeuropathy among dentists.
BACKGROUND
The authors undertook a study to determine the prevalence in dentists of abnormal sensory nerve conduction and/or symptoms of carpal tunnel syndrome, or CTS, the most common nerve entrapment syndrome.


METHODS
In a cross-sectional study, dentists (n = 1,079) were screened during the American Dental Association's Annual Health Screening Program in 1997 and 1998 by means of standard electrodiagnostic measures in the dominant hand and a self-reported symptom questionnaire. The authors diagnosed a median mononeuropathy from a 0.5- or 0.8-millisecond, or ms, prolongation of the median sensory-evoked peak latency compared to the ulnar latency. They diagnosed CTS if the subject also had accompanying symptoms of numbness, tingling or pain.


RESULTS
Thirteen percent of screened dentists were diagnosed with a median mononeuropathy (using a 0.5-ms prolongation as the criterion), but only 32 percent of these had symptoms consistent with CTS (4.8 percent overall). When the 0.8-ms prolongation was used as the electrodiagnostic criterion, only 2.9 percent (overall) were diagnosed with CTS. People with diabetes, rheumatoid arthritis and obesity were more likely to have a median mononeuropathy.


CONCLUSIONS
The prevalence of symptoms consistent with CTS in the dominant hand among dentists was higher than the prevalence in the general population. However, when electrodiagnostic confirmation is added, the prevalence of CTS was nearly the same as that among the general population.


CONCLUSIONS
Early recognition of CTS can lead to more effective management. Education regarding ergonomic risk factors can be an effective preventive measure.
Hamann
C
C
Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor. Hamann@SmartPractice.com
Werner
R A
RA
Franzblau
A
A
Rodgers
P A
PA
Siew
C
C
Gruninger
S
S
D000328:Adult; D002349:Carpal Tunnel Syndrome / Q000175:diagnosis / Q000453:epidemiology*; D016009:Chi-Square Distribution; D003430:Cross-Sectional Studies; D003813:Dentistry; D003815:Dentists; D003937:Diagnosis, Differential; D004568:Electrodiagnosis; D006804:Ergonomics; D005260:Female; D006801:Humans; D008297:Male; D020423:Median Neuropathy / Q000175:diagnosis / Q000453:epidemiology; D008875:Middle Aged; D009784:Occupational Diseases / Q000175:diagnosis / Q000453:epidemiology*; D015995:Prevalence; D012737:Sex Factors; D011795:Surveys and Questionnaires; D013548:Sweden / Q000453:epidemiology; D014481:United States / Q000453:epidemiology