2010 RWISO Journal - Roth Williams International Society of ...

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This is an extremely large error when we are attempting to locate a THA. Fortunately, it seldom happens that we attempt to locate a THA from a distance of 50 mm in clinical practice (Figure 58). Figure 58 If we try to extend the stylus to the skin to mark a hinge point from a point located at a far distance from the skin using Axiograph III, it would result in a very large error. The fact remains, however, that the greater the distance between the skin and the stylus, the less accurate are the marks on the skin (Figure 59). Therefore, we are likely to make a large error if we use a false hinge axis that deviates substantially from the THA (Figure 60). Figure 59 The greater the distance between the skin and the stylus, the less accurate the marks of the THA on the skin will be. Precision mounting using a false hinge axis results in a very large error. Figure 60 We are likely to create a large error if we use the false hinge axis, which deviates substantially from the THA. 30 Choi | Hinge Axis: The Need for Accuracy in Precision Mounting Part 2 Next, let us examine the precision mounting system of the Axiograph III. Figure 61 shows a magnified view of the highlighted area. The various parts of the highlighted area are shown in Figure 62. They are, respectively, the side arm of the upper frame, the flag table attached to the side arm, the recording arm of the lower frame, and the stylus attached to the recording arm. Figure 61 Schematic drawing and real picture of the stylus area. Figure 62 Magnified view The THA is the line that connects the left and the right styli. It passes through an imaginary hole in the flag table. The stylus marks the hinge point in red or blue on the graph of the flag table (Figures 63 and 64).
Figure 63 Flag table. Figure 64 Flag table. The hinge point on the graph is isolated with the hinge axis clamp. The hinge axis clamp has two bars. Each bar has a hole in it, and the two holes are aligned (Figures 65 and 66). Figure 65 Flag table with hinge axis clamp. Figure 66 Schematic drawing and real picture of the flag table and the clamp. The precision mounting stand has two hinge axis alignment pins. These pins are designed to fit into the small holes on the inner bar of the hinge axis clamp (Figures 67-a, b). Figure 67-a Hinge axis alignment pin fits into the inner clamp hole. Figure 67-b Hinge axis alignment belongs to mounting stand. RWISO Journal | September 2010 31
Page 1 and 2: Contents Volume 2, No. 1, September
Page 3 and 4: Letter from the President Samuel B.
Page 5 and 6: News from the Roth Williams Teachin
Page 7 and 8: In addition, three 8-hour courses w
Page 9 and 10: Drs. Edson Illipronti and Solange F
Page 11 and 12: The Transverse Dimension: Diagnosis
Page 13 and 14: Figure 4 Patient with gingival rece
Page 15 and 16: idge determines the width of the ma
Page 17 and 18: Figure 16 MPV of a cone-beam CT sca
Page 19 and 20: 8. Vanarsdall RL. Transverse dimens
Page 21 and 22: Hinge Axis: The Need for Accuracy i
Page 23 and 24: to the flag table (Figure 25). The
Page 25 and 26: The Axi-Path is designed so that th
Page 27 and 28: Figure 43 Nasion relator moves tran
Page 29: The distance between the preauricul
Page 33 and 34: Figure 72 Figure 73 Supposition: Th
Page 35 and 36: Figure 83 The distance between the
Page 37 and 38: Condylar Resorption, Matrix Metallo
Page 39 and 40: Figure 4-c The extracellular activi
Page 41 and 42: shows promise in curbing the bone l
Page 43 and 44: 29. Zardeneta G, Milam SB, Lee T, S
Page 45 and 46: Comparison of Maxillary Cast Positi
Page 47 and 48: points. They found that the mean di
Page 49 and 50: Figure 2-a, b True-hinge facebow. F
Page 51 and 52: to adjust for experimentwide error
Page 53 and 54: pending upon the direction in which
Page 55 and 56: 28. Goska JR, Christensen LV. Compa
Page 57 and 58: The Effect of Tooth Wear on Postort
Page 59 and 60: Figure 4 Slight attrition occurred
Page 61 and 62: improved, with retraction of the up
Page 63 and 64: Figure 9-e Left lateral intraoral p
Page 65 and 66: All available intraoral photographs
Page 67 and 68: Figure 21 Mandibular movement after
Page 69 and 70: Physiologic Treatment Goals in Orth
Page 71 and 72: REFERENCES 1. Dawson PE. The Concep
Page 73 and 74: 70. McNamara JA Jr. The independent
Page 75 and 76: Effect of Gnathologic Positioner We
Page 77 and 78: sure was first checked in the mount
Page 79 and 80: For these analyses, the desired sig
Page 81 and 82:
the .05 level of significance in th
Page 83 and 84:
RWISO Journal | September 2010 83
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2010 RWISO Journal - Roth Williams International Society of ...

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