Clinic theory - week 1

ergnomics

applied science concerned with the “fit” between people and technological tools and environments

1. awkward posture 2. static positions 3. force 4. repetitive movements

what are the ergonomic hazards for DH?

static posture

maintaining the body in one fixed position for an extended period of time

force

amount of effort created by the muscles and the amount of pressure placed on body part

thoracic outlet syndrome

painful disorder of the fingers, hand and/or wrist caused by compression of the brachial nerve plexus and vessels

rotator cuff tendinitis

painful inflammation of the muscle tendons in the shoulder region

pronator syndrome

painful disorder of the wrist and hand caused by compression of the median nerve by the pronator muscle

extensor wad strain

painful disorder of the fingers as a result of injury to the extensor muscles

carpal tunnel syndrome

painful disorder of the wrist and hand caused by compression of the median nerve in wrist

ulnar nerve entrapment

painful disorder of the lower arm and wrist caused by compression of the ulnar nerve at the wrist

tenosynovitis

painful inflammation of the tendons on the side of the wrist and base of the thumb

tendinitis

painful inflammation of the tendons of the wrist

neutral neck position

head tilt of 0-15 degrees

neutral back position

leaning forward slightly from the waist or hips

neutral forearm position

forearm parallel to the floor

neutral hand position

little finger-side of palm slightly lower than the thumb-side of palm

1. cervical (inward curve) 2. lumbar (inward curve) 3. thoracic (slight outward curve)

what are the 3 healthy curves of the spine?

coaxial illumination

spectacle-mounted or headband-mounted lights

modified pen grasp

facilitates precise control of instrument, allows detection of rough areas on tooth surface, lessens musculoskeletal stress

thumb and index finger

what is used to hold instrument?

guide working-end and feel vibrations from the working-end to shank

what does the middle finger do?

stabilize and support the hand for control and strength

what does ring finger do?

no function

what does the little finger do?

proprioception

person’s ability to sense their body, it's position and movement through space