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Difference between revisions of "Transverse Hinge Axis"
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This chapter addresses the disconnection between clinicians and the bioengineering aspects of diagnostic tools, focusing on kinematic replicators like the Sirognathograph and Kinesiograph K7. These devices, widely used for analyzing mandibular movements, lose three angular degrees of freedom, undermining their ability to accurately represent the complexity of mandibular dynamics. The chapter critiques the Research Diagnostic Criteria (RDC) for dismissing the clinical value of these tools due to perceived low validity. However, the clinical and biomechanical importance of accurately determining the transverse hinge axis (tHA) and its associated rototranslational movements is highlighted, showing that errors in tHA localization can significantly affect dental occlusion and prosthetic rehabilitation. | '''Abstract:''' This chapter addresses the disconnection between clinicians and the bioengineering aspects of diagnostic tools, focusing on kinematic replicators like the Sirognathograph and Kinesiograph K7. These devices, widely used for analyzing mandibular movements, lose three angular degrees of freedom, undermining their ability to accurately represent the complexity of mandibular dynamics. The chapter critiques the Research Diagnostic Criteria (RDC) for dismissing the clinical value of these tools due to perceived low validity. However, the clinical and biomechanical importance of accurately determining the transverse hinge axis (tHA) and its associated rototranslational movements is highlighted, showing that errors in tHA localization can significantly affect dental occlusion and prosthetic rehabilitation. | ||
The discussion introduces a comparison between two approaches: the paraocclusal clutch, which avoids vertical interference, and the occlusal clutch, which can cause discrepancies in occlusal recordings. Through practical examples and mathematical simulations, the chapter demonstrates how even slight mislocalizations of the tHA—particularly in scenarios involving inclined dental cusps—can result in substantial occlusal errors, compromising masticatory efficiency and patient comfort. | The discussion introduces a comparison between two approaches: the paraocclusal clutch, which avoids vertical interference, and the occlusal clutch, which can cause discrepancies in occlusal recordings. Through practical examples and mathematical simulations, the chapter demonstrates how even slight mislocalizations of the tHA—particularly in scenarios involving inclined dental cusps—can result in substantial occlusal errors, compromising masticatory efficiency and patient comfort. | ||