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Mechanisms Leading To Musculoskeletal Disorders In Dentistry 2


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Mechanisms Leading To Musculoskeletal Disorders In Dentistry 2

  1. 1. <ul><li>A forward - head posture also can lead to muscle imbalances, contributing to a rounded shoulder posture. </li></ul><ul><li>This posture can predispose the operator to impingement of the supraspinous tendon in the shoulder (rotator cuff impingement) when reaching for items. </li></ul>
  2. 2. <ul><li>Additionally, static posture of the arms in an elevated or abducted state of more than 30 degrees impedes the blood flow to the supraspinous muscle and tendon. Prolonged arm abduction also can lead to trapezius myalgia—chronic pain and trigger points in the upper trapezius muscle. </li></ul>
  3. 3. Thoracic outlet syndrome
  4. 4. Bad Posture can result in : <ul><li>Headaches, TMJ, Neck pain, Shoulder Pain, Mid-Back Pain, Low Back Pain, Hip Pain, Knee Pains, Sciatica,  Fatigue, Osteoarthritis, Allergies, Asthma, Ear Infections and many more conditions. </li></ul>
  5. 5. MUSCLE iskemia dan nekrosis <ul><li>Ischemic areas are especially susceptible to the development of trigger points, They feel like a knot or small pea . </li></ul><ul><li>active ) painful ) or latent ( causing stiffness and restricting range of motion ). </li></ul>
  6. 6. Necrosis muscle ( nekrosis otot )
  7. 8. ketidakseimbangan otot <ul><li>muscles stabiliz e and those that move </li></ul>
  8. 9. <ul><li>The forward - head - and - rounded - shoulder posture also increases forces on the upper neck muscles ( upper trapezius and levator scapulae ) and spinal vertebral disks </li></ul>
  9. 10. <ul><li>Frequent relaxing and stretching of the neck muscles, strengthening of the deep postural cervical muscles and preservation of the cervical lordosis in proper posture (ear over the shoulder) with all activities, including sleeping and driving, is essential for optimal musculoskeletal health of the neck. </li></ul>
  10. 12. Mampatan tulang spinal compression
  11. 13. MUSCULOSKELETAL DISORDERS <ul><ul><li>Tension neck syndrome: pain, stiffness and muscle spasms in the cervical musculature, often referring pain between shoulder blades or the occiput, and sometimes numbness or tingling into one arm or hand. </li></ul></ul><ul><ul><li>Forward head posture may precede this syndrome, precipitating muscle imbalances, ischemia, trigger points, or cervical disk degeneration or herniation. </li></ul></ul>
  12. 15. The muscle imbalance between the abdominal and low back muscles <ul><li>Repeatedly leaning toward a patient </li></ul><ul><li>transversus abdominus tends to become weaker </li></ul>
  13. 17. SPINAL DISK HERNIATION AND DEGENERATION <ul><li>In unsupported sitting, pressure in the lumbar spinal disks increases 40 percent over pressure from standing. </li></ul><ul><li>During forward flexion and rotation—a position often assumed by dental operators—the pressure increases 400 percent, </li></ul>
  14. 18. <ul><li>This flattening of the lumbar curve also causes the nucleus in the spinal disk to migrate posteriorly toward the spinal cord. </li></ul><ul><li>Over time, the posterior wall of the disk becomes weak, and disk herniation can occur </li></ul>