Chris Stevens, DDS The benefits of cuspid-protected lateral excursions have been debated for decades. Some clinicians and academicians felt cuspid rise was mandatory for case success while others pointed out that alternate disclusion schemes, such as group function, were just as reliable. Yet, without appropriate and objective measurement tools, the debate was based primarily on opinion. Today, however, easily applied, PC-enhanced recording means are available.
Cuspid Disclusion: Is It Not Academic?
Restorative Dentistry: Cuspid Disclusion-Is It Not Academic? | Inside Dentistry
The patient complained of poor facial and dental appearance and mobility of lower incisors. Patient history did not reveal any current medical conditions or a family history, any previous injury or trauma and no previous interventions were made to treat the patient. With extraoral examination, no TMJ dysfunction, muscle pain, or tenderness was found. Analysis of facial appearance was performed using photos, no horizontal or vertical asymmetry was noted, and the patient presented a class I skeletal pattern. Smile analysis revealed a wide smile zone and a gummy smile. Panoramic radiograph and cone beam tomography cross-sectional view confirmed a severe horizontal bone loss, PDL widening of mandibular incisors and oblique fracture of lower left central incisor. Preoperative cone beam tomography image showing impacted canine for the patient: a axial view; b cross-sectional view; c panoramic view; d 3D view.
Anterior Guidance, Protrusive Guidance
The device provides initial mounting of maxillary models using a facebow. A 20 degree sliding mounting plate is also provided for aiding in the setting of the Occlusal Plane. Abnormal mandibular positioning can - be translated into stress related symptoms of various kinds such as headaches, muscle spasms in the head and neck etc. When this relationship is altered, the muscles of mastication may go into spasm.
Anterior guidance, which can be categorized as group function or canine guidance, is essential for esthetics, phonetics, and mastication. This article reviews the historical development and philosophies of both occlusal schemes. There is no scientific evidence that supports one occlusal scheme over the other. Where anterior guidance must be reestablished or where it changes, there currently appear to be more authorities who favor canine guidance over group function.