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

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• • • • The measurement error at the inner entrance is 0.47 mm (Figure 77). Figure 77 The amount of measurement error will be 0.47 mm. The measurement error on the skin increases even more (Figure 78). Figure 78 Supposition: The side arm is separated 3 mm from the skin. The hinge point is measured at level of entrance of the clamp hole. The measurement error on the skin is 0.5 mm (Figure 79). Figure 79 The amount of measurement error will be 0.5 mm. 34 Choi | Hinge Axis: The Need for Accuracy in Precision Mounting Part 2 • The measurement error on the inner surface of the flag table is 0.20 mm and this is almost the same as or smaller than that of Axi-Path. Although the clamp hole provides a bit of leeway with the pin fitted, this seems to have no clinical significance. Since the Axiograph III system uses the hinge point on the graph, while the Axi-Path system uses the hinge mark on the skin, the two systems seem to yield almost the same accuracy in precision mounting (Figure 80). Figure 80 The measurement error on the inner surface of the flag table is 0.20 mm. Error is the same as, or less than, with Axi-Path. Summary and Conclusions The measurement errors of the hinge axis locations were calculated for the two recording systems, the Axi-Path of Panadent and the Axiograph III of SAM. The amount of the measurement errors were nearly the same for both systems. While the Axiograph III system locates the hinge axis using hinge points on the flag table, the Axi-Path system locates the hinge axis using hinge marks on the skin. Although the distance between the flag table and the skin is greater in the Axiograph, we found no significant difference in accuracy between the two systems, as explained previously. (Figure 83)
Figure 83 The distance between the flag table and the skin is longer in Axiograph III than in Axi-Path. But since Axiograph III uses hinge points on graph paper to locate the hinge axis, it is equally accurate. Since the Axiograph III system does not mark hinge points on the skin, it may be necessary to relocate the axes for each mounting. Mechanical stability of the recording device is very important for precision. The device must remain firmly seated on the head. In this respect, the Axiograph III seems to be superior to the Axi-Path (Figure 85). ■ Figure 85 Mechanical stability of the recording device is very important for precision. In this respect Axiograph III seems to be superior to Axi-Path. Further Reading Baldauf A, Mack H, Wirth C G. Bestommung der Scharnierachse mittels des äußeren Gehörgangs. IOK, 28. JAHRG. 1996. Broderson S P. Anterior guidance: The key to successful occlusal treatment. J Prosthet Dent. 1978;39:396–400. Cho Y, Hobo S, Takahashi H.Occlusion. Seoul: Kunja; 1996. Dawson P E. Evaluation, Diagnosis, and Treatment of Occlusal Problems. 2nd ed. St. Louis, Mo: Mosby; 1989. Glossary of Dental Prosthodontics. Korea: Korean Association of Prosthodontics; 2006. Hobo S. Twin-tables technique for occlusal rehabilitation. Pt. 1: Mechanism of anterior guidance. J Prosthet Dent. 1991;66:299–303. Hobo S. Twin-tables technique for occlusal rehabilitation. Pt. 2: Clinical procedures. J Prosthet Dent. 1991;66:471–477. Lee R L. Panadent instruction manual for advanced articulator system. Panadent Corporation, CA, USA, 1988. Lundeen H C, Gibbs C H. The Function of Teeth. L and G; 2005. Nagy W W, Smithy T J, Wirth C G. Accuracy of a predetermined transverse horizontal mandibular axis point. J Prosthet Dent. 2002;87:387– 394. Okeson J P. Fundamentals of Occlusion and Temporomandibular Disorders. St. Louis, Mo: Mosby; 1985. continued on next page... RWISO Journal | September 2010 35
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 and 30: The distance between the preauricul
Page 31 and 32: Figure 63 Flag table. Figure 64 Fla
Page 33: Figure 72 Figure 73 Supposition: Th
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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