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Charkumarn, M.: “Proprioceptive Derivation.” International Journal of Occupational Safety and Ergonomics 10(2): , 2004

6. Chaikumarn, M. “Working Conditions and Dentists’ Attitude Towards Proprioceptive Derivation.” International Journal of Occupational Safety and Ergonomics 10, N=12
Dentists who practiced pd liked it.
Only 2 disliked pd because they thought it was too hard
Pd improved work efficiency compared to conventional approach

8. Chaikumarn, M. “Difference in Dentist’s Working Posture When Adopting Proprioceptive Derivation Vs Conventional Concepts.” International Journal of Occupational Safety and Ergonomics 10, N=18