1 / 59

Setting Posterior Teeth

Setting Posterior Teeth. Set for Function. Philosophies of Denture Occlusion. Many philosophies of arranging denture occlusion No definitive scientific studies prove one occlusal scheme clearly superior. Rationale for Dalhousie Approach. Principals to choose an occlusal scheme

tuyet
Download Presentation

Setting Posterior Teeth

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Setting Posterior Teeth Set for Function

  2. Philosophies of Denture Occlusion • Many philosophies of arranging denture occlusion • Nodefinitivescientific studies prove one occlusal scheme clearly superior

  3. Rationale for Dalhousie Approach • Principals to choose an occlusal scheme • Based on clinical experience • Dalhousie: two occlusal schemes : • Lingualized Occlusion • Monoplane Occlusion

  4. Occlusal SchemesAttempts to Stabilize Dentures • Lingualized Occlusion: Contacts on centered on mandibular ridge minimizes movement • Monoplane Occlusion: Lack of cusps minimizes lateral forces on denture

  5. Lingualized Occlusion • Centric contacts are maxillary lingual cusp to central fossa / marginal ridge Based on the UCLA/IVOCLAR/ACP Series

  6. Lingualized Occlusion • Anatomic teeth used in maxilla • Better esthetics than Monoplane • Shallow cusped mandibular teeth • Forces centered over mandibular ridge

  7. Lingualized Occlusion • No overbite • May or may not have balancing contacts in excursions • Anterior teeth - must make at least grazing contacts in excursions

  8. Lingualized Occlusion • Maxillary anatomic (33°) • Mandibular Teeth • Steep Condylar Guidance • Shallow cusped (Anatoline) • Shallow Condylar Guidance • Non-anatomic (Portrait 0°)

  9. Semi-anatomic Denture Occlusion Options Non-anatomic (balancing ramp) Lingualized (lingual contact) Non-anatomic Anatomic

  10. Occlusal plane • Set mandibular premolars & 1st molar : • Level with occl plane • Centered over ridge Line indicating the crest of the ridge

  11. Balanced Lingualized Occlusion Maxillary anatomic opposing Mandibular shallow cusp

  12. If using a lingualized posterior tooth form (Dentsply Anatoline) • little or no Curve of Wilson • lingual and buccal cusps of level with plane of occlusion

  13. 15 degrees Second molar elevated by ~ 15° from the occlusal plane

  14. Max. lingual cusps contact central fossae/marginal ridge ~ 1mm space between buccal cusps

  15. Maxillary lingual cusps firmly contact bilaterally simultaneously

  16. Centric Position Verify centric No max. buccal cusp contacts in: • Centric • Lateral excursions

  17. Working Excursions Verify excursive contacts Anterior teeth are in contact during lateral excursions

  18. Balancing Excursions Note the balancing contacts

  19. Effect of Mandible Moving Downward During Excursions

  20. Maintaining Balancing Contacts • Change occlusal plane angle • Increase compensating curves • Increase cusp angles

  21. Achieving Balance • Condylar angulation • Recorded with protrusive record • Cusp angle • Selected by dentist

  22. Achieving Balance • Occlusal Plane • Determined by dentist with wax rims • Curve of Spee & Curve of Wilson • Controlled by inclination of teeth

  23. Checking for Balance Feels Smoooooothin excursions - Fingers on Maxillary Canines - On Articulator

  24. Assessing Balance • Jumps or bumps are due to cusp tips moving over other cusp tips, inclines, marginal ridges

  25. Occlusal RefinementOcclusal Adjustment, Selective Grinding • Set teeth as close to: • Maximum intercuspation • Balance • All setups will need some adjustment

  26. ‘IIF’ Rule IIF you have contacts on the Inner Inclines of Functional cusps they are balancing contacts

  27. Find the Balancing Contact

  28. Find the Balancing Contact

  29. What type of Contact?

  30. What type of Contact?

  31. What type of Contacts?

  32. What type of Contact?

  33. Assess Contacts • Centric Stops • Excursions

  34. Non-Balanced Lingualized Occlusion Maxillary anatomic opposing mandibular non-anatomic

  35. Mortar & pestle occlusion without maxillary buccal cusp contact

  36. Lack of mandibular cusp angles and no attempt to balance the occlusion

  37. No compensating curves No overbite

  38. No overbite

  39. More for Class II patients Magnitude of Overjet Class I Class II

  40. Class III Magnitude of Horizontal Overlap Class III patients Little or no overjet

  41. Setting the posterior teeth • Teeth should end prior to the ascending ramus

  42. Maxillary lingual cusps contact central groove/marginal ridge of the opposing teeth

  43. The horizontal overlap should be ideal and should be sufficient to prevent biting of the cheek and corner of the mouth Horizontal overlap

  44. All maxillary teeth, with the exception of the lateral incisors and cuspids, should be on the plane of occlusion

  45. Monoplane Occlusion

  46. Monoplane Occlusion • Cuspless teeth (0°) on a flat plane with 1.5-2.0 mm overjet • No cusp to fossa relationship • No anterior contacts in centric position

  47. Monoplane Occlusion • Eliminate cusps • lateral forces reduced • improves stability • Simplifies tooth arrangement

  48. Monoplane Occlusion • No overbite (would cause tilting) • Overjet of 2 mm is used to create an illusion of overbite

More Related