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NUCCA Biomechanics By Takanobu Nakaseko. Review of Misalignment Types.

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Presentation on theme: "NUCCA Biomechanics By Takanobu Nakaseko. Review of Misalignment Types."— Presentation transcript:

1 NUCCA Biomechanics By Takanobu Nakaseko

2 Review of Misalignment Types

3 Type1 Misalignment Characteristics - C1 laterality on the same side of angular rotation - Contralateral acute angle - Skull is parallel to vertical axis - C1 is above parallel Side of Laterality

4 Type2 Misalignment Characteristics - C1 laterality on the opposite side of angular rotation - Ipsilateral acute angle - Skull is tipped toward vertical axis - C1 remains fairly horizontal - Laterality produced mainly by skull Side of Laterality Mainly by Skull

5 Type3 Misalignment Characteristics - C1 laterality on the same side of skull tipping - No angular rotation - C1 remains fairly horizontal - Laterality produced by skull tipping Side of Laterality Directl y by Skull

6 Type4 Misalignment Characteristics - C1 laterality on the same side of angular rotation - Contralateral acute angle - Skull is tilted away from vertical axis - C1 is above parallel Side of Laterality

7 SUMMARY Acute AngleCause Type 1 ContralateralC1 Sideslip Type 2 IpsilateralHead tilt Type 3 -Head tilt Type 4 Contralateral C1 sideslip / Head tilt

8 How to Correct Misalignment? Combination of the Head piece placement and Triceps pull Patient placement is extremely crucial! Using 3-D Xray (Lateral, Nasium, Vertex) to analyze how to set the patient on the table and specific correction vector.

9 Head Piece

10 Mastoid Process

11 Mechanism of Head Piece Skull COG on the B

12 Mechanism of Head Piece Skull COG on the C

13 Mechanism of Head Piece Skull COG on the A

14 C/A? Condylar circle over Axial circle C/A is the specific vector which allows both condylar circle and axial circle to rotate the same distance, but different speed. C/A is unique to each individual Can be calculated. C/A=(A-C)/2

15 C/A?

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18 Type 1 The vector is always higher than C/A in order to affect lower angle. Type 2&3 The vector is always lower than C/A in order to affect head tilt. Type 4 The vector is close to C/A because both lower angle and head tilt should be corrected at the same time.

19 Type 1 Correction

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21 Type 2 Correction

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23 Type 3 Correction

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25 Type 4 Correction

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