TOPIC: OCCLUSION RELATIONSHIP
🎯 KEY POINTS
🔹Group function is characterized by contact of all teeth on the working side and no contact on the balancing side during lateral excursions.
🔹Maximum limit of transverse hinge axis movement is 18–22 mm.
🔹Balanced occlusion is based on three classic theories of occlusion: Bonwill’s three points of occlusal balance, Spee’s curve of Spee and Monson’s spherical theory of occlusion.
🔹The functionally generated path technique described by F.S. Meyer is based on group function.
🔹In natural occlusion, the centric relation position is located 0.5–1.0mm posterior to the centric occlusion position.
🔹The point at which the maximum opening of the jaws occurs without translation movement of the condyle is called terminal hinge axis position.
🔹Mutually protected occlusion or canine-guided occlusion is characterized by posterior teeth protecting the anterior teeth in intercuspal position and anterior teeth protecting the posterior teeth in all mandibular excursions.
🔹Arcon articulators are preferred for fixed prosthodontics because of accuracy and ease during occlusal waxing.
🔹Pantographic tracings are used with fully adjustable articulators.
🔹Functionally generated path technique was first advocated by F.S. Meyer.
🔹The most important factor in the success of the artificial crown is restoration of proper occlusion.
🔎 CONCEPTS OF OCCLUSION
🔸Bilateral balanced occlusion
🔸Unilateral balanced occlusion or group function
🔸Mutually protected occlusion
🔎 FEATURES OF DIAGNOSTIC WAX-UP:
🔺It is a valuable guide to the treatment objective for both the clinician and technician.
🔺It provides information related to the occlusal scheme which is to be generated.
🔺It provides the patient with an opportunity to visualize the outcome of the treatment.
🔺It provides the template for provisional restorations.
🔺It provides information about the need for crown lengthening and orthodontic tooth movement.
🔺It acts as a guide for optimum crown preparation.
🔺It helps in creating an occlusal plane.
📌 PATHOLOGICAL OCCLUSION
👉 DEFINITION: An occlusal relationship capable of producing pathologic changes in the stomatognathic system.
📌 SPLINTS
👉 DEFINITION: A rigid or flexible material used to protect, immobilize, or restrict motion in a part.
🔶 OCCLUSAL INTERFERENCE CAN OCCUR IN THE FOLLOWING:
✳️ In Centric Contact
- On the working side when mandible makes lateral excursion.
- On the nonworking side when mandible makes lateral excursion.
✳️ In Protrusive Contact
- When occlusal interference occurs, occlusal therapy should be considered.