Downloaded 27 times
More Related Content
Similar to Balanced occlusion
Balanced occlusion
- 1. Balanced Occlusion Prof. GunjanSrivastava Professor Department of Prosthodontics Institute of Dental Sciences Siksha’O’Anusandhan Bhubaneswar
- 4. Balanced Occlusion GPT 9:The Bilateral, Simultaneous Occlusal Contact of The Anterior And Posterior Teeth in Excursive Movements.
- 8.
- 9. Bonwill Equilateral TriangleTheory(1858) • Distance between the condyles and each condyle and incisal point is 4 inch forming an equilateral triangle. • This theory proposed that teeth move in relation to each other as guided by the condylar controls and the incisal point.
- 10. Hall’s Conical Theory1915 • The lower teeth move over the surfaces of the upper teeth as over the surfaces of a cone and with a central axis of the cone tipped at a 45 degree angle to the occlusal plane.
- 11. G. S. MonsonSpherical Theory (1918)
- 12. CONCEPTS 1. Gysi 2. French 3.Sear 4. Pleasure 5. Frush 6. Hanau 7. Trapozanno 8. Boucher 9. Lott 10. Levin
- 19. Hanau’s Laws ofArticulation
- 20. Hanau’s Quint • Condylarguidance • Incisal guidance • Compensating Curves • Plane of Occlusion • Cuspal Inclination
- 23. He stated occlusalplane could be located at various heightstofavor weaker ridge. He also stated that by arranging cusped teeth-these curves are produced automatically
- 27.
- 28. Occlusion for completedenture • Monoplane occlusion • Lingualized occlusion • Balanced occlusion
- 35. Lingualized occlusion • Thisform of denture occlusion articulates the maxillary lingual cusps with the mandibular occlusal surfaces in centric working and non-working mandibular positions. • This term was first described by S Howard Payne in 1941.
- 41. Goals of balancedocclusion • Simultaneous contact in centric relation • Working side contact • Balancing contact in protrusion • Balancing contact in lateral excursion
- 44. Enter Bolus ExitBalance • Prime gave the concept of “ ENTER BOLUS EXIT BALANCE” which implies that introduction of food on one side will prevent the teeth of opposite side from contacting and hence occlusal balance is impossible during mastication. • Normal individual makes masticatory tooth contact only for 10 mins in a day compared to 4 hrs of total tooth contact during other functions. So for these 4 hrs of tooth contact , balanced occlusion is important to maintain denture stability.
- 45. Enter Bolus EnterBalance
- 46.
- 48. Types of BalancedOcclusion • Unilateral Balanced Occlusion • Bilateral Balanced Occlusion • Protrusive balanced Occlusion • Lateral Balanced Occlusion
- 49. • Unilateral BalancedOcclusion This is a type of occlusion seen on occlusal surfaces of teeth on one side when they occlude simultaneously with a smooth , uninterrupted glide. • This is not followed during complete denture preparation. It is more pertained to fixed partial dentures
- 50. • Bilateral BalancedOcclusion This is a type of occlusion that is seen when a simultaneous contact occurs on both sides in centric and eccentric positions. • Bilateral balanced occlusion helps to distribute the occlusal load evenly across the arch and therefore helps to improve stability of the denture during centric, eccentric or parafunctional movements.
- 51. • Protrusive balancedOcclusion This type of balanced occlusion is present when mandible moves in a forward direction and the occlusal contacts are smooth and simultaneous anteriorly and posteriorly. • There should be atleast three points of contact in the occlusal plane. Two located posteriorly and one anteriorly. • Absent in natural dentition. • Posterior contact during protrusion to maintain balance
- 52. • Lateral BalancedOcclusion In lateral balance there will be a minimal simultaneous three point contact present during lateral movement of mandible. • This is absent in natural dentition. • Teeth should be arranged such that there is simultaneous tooth contact in balancing side and working side.
- 53. • Selective grindingisdefined as the, “intentional alterationof the occlusal surfacesoftheteethto change theirform” —GPT • Rationale • Eliminate occlusal interferences • Achievebalanced occlusion • Contactsin harmony with TMJand neuromuscular system
- 54. Principle • Eliminateinterlocking transverseridges • Functionalcusp not subjectedto selective grinding • Lowerbuccal cusp inclines can bereducedbutnot thecusp •Maxillary buccal cusp out of contact during centric occlusion and eccentric positions.
- 55. Grinding Sequence forWorking and Balancing Relation 1. Loosen up the condylar elements of the articulator so that it move laterally. 2. On lateral movement of articulator, teeth are allowed to occlude over each other, there are interferences 3. On working side - upper buccal cusp lower buccal cusp 4. On Balancing side – upper lingual cusp lower distobuccal inclines of buccal cusp
- 56. 5. Mark witharticulating papers- working side contacts and balancing side contacts on the opposite side
- 57. BULL’s Rule” • Workingside BULL rule- Buccal cusp of Upper teeth Lingual cusp of Lower teeth Those are the non- supporting cusps for working side. • If instrument is moved laterally cusps cross each other smoothly.
- 58. • Incisal pinhas stayed flush with the table. • When you move the incisal pin you should move only 3-4mm. • Don’t need to go real far for excursions.
- 59. • Opposite sidesame procedure repeated. • Balancing side contacts are best seen from the rear side of the articulator.
- 60. Thankyou so muchfor your patient listening!!!