Fundamentals Of Occlusion The TemporoMandibular Joints Why Is
![Fundamentals Of Occlusion Fundamentals Of Occlusion](https://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-1.jpg)
Fundamentals Of Occlusion
![The Temporo-Mandibular Joints The Temporo-Mandibular Joints](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-2.jpg)
The Temporo-Mandibular Joints
![Why Is Occlusion Important ? • Assist in diagnosis • Planning in restorative care Why Is Occlusion Important ? • Assist in diagnosis • Planning in restorative care](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-3.jpg)
Why Is Occlusion Important ? • Assist in diagnosis • Planning in restorative care To minimize failure Ensure predictable outcome by minimising loads on teeth Managing the environment so that we get the minimal amount of surprises (Similar to wearing a car seatbelt), the less the patient has to adapt the better.
![Definitions OCCLUSION A relationship between the masticatory surfaces of the maxillary and mandibular teeth Definitions OCCLUSION A relationship between the masticatory surfaces of the maxillary and mandibular teeth](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-4.jpg)
Definitions OCCLUSION A relationship between the masticatory surfaces of the maxillary and mandibular teeth The relationship between tooth contacts and mandibular movements
![Centric Occlusion Relationship of the mandible to the maxilla when the teeth are in Centric Occlusion Relationship of the mandible to the maxilla when the teeth are in](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-5.jpg)
Centric Occlusion Relationship of the mandible to the maxilla when the teeth are in maximum occlusal contact, irrespective of the position or alignment of the condyle-disk assemblies. The relationship between the maxilla and mandible when the teeth are maximally meshed with the mandible in its most cranial position
![Centric Relation A relationship of the mandible to the skull where the condyle is Centric Relation A relationship of the mandible to the skull where the condyle is](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-6.jpg)
Centric Relation A relationship of the mandible to the skull where the condyle is in an anteriorly, superiorly braced position along the articular eminence of the glenoid fossa, with the articular disc interposed between the Condyle and eminence.
![Ideal vs Pathologic Occlusion Ideal vs Pathologic Occlusion](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-7.jpg)
Ideal vs Pathologic Occlusion
![Ideal Occlusion An ideal occlusion should provide comfort and function in a predictable way. Ideal Occlusion An ideal occlusion should provide comfort and function in a predictable way.](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-8.jpg)
Ideal Occlusion An ideal occlusion should provide comfort and function in a predictable way. 1) Ideal occlusion at tooth level Cusp tip to fossa or cusp to marginal ridge contact – i. e no incline contacts 2) Ideal occlusion at articulatory system level Posterior stability, Anterior guidance, Lack of posterior interferences. 3) Ideal occlusion at patient level Within the adaptability of the rest of the articulatory system.
![Features Of Ideal Occlusion A) Anterior Guidance: • In lateral excursions of the mandible, Features Of Ideal Occlusion A) Anterior Guidance: • In lateral excursions of the mandible,](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-9.jpg)
Features Of Ideal Occlusion A) Anterior Guidance: • In lateral excursions of the mandible, workingside contacts (preferably on the canines) disocclude or separate the nonworking teeth instantly. • In protrusive excursions, anterior tooth contacts will disocclude the posterior teeth.
![Protrusive Guidance Excursive Guidance Protrusive Guidance Excursive Guidance](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-10.jpg)
Protrusive Guidance Excursive Guidance
![Features Of Ideal Occlusion B) Posterior stability: Enough posterior teeth in each arch with Features Of Ideal Occlusion B) Posterior stability: Enough posterior teeth in each arch with](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-11.jpg)
Features Of Ideal Occlusion B) Posterior stability: Enough posterior teeth in each arch with solid and stable contacts in appropriate positions to evenly distribute loads and to allow the mandible to close in a reproducible CO. Posterior teeth contact more heavily than anterior teeth It is enhanced by tall cusp – deep fossa Maintains teeth position CO or ICP is easily reproduced Increased masticatory function Signs of lack of PS, drifting, fremitus, fractured rest, mobility & wear
![Lack Of Posterior Stability Lack Of Posterior Stability](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-12.jpg)
Lack Of Posterior Stability
![Features Of Ideal Occlusion C) Absence of posterior interferences The non-working side Features Of Ideal Occlusion C) Absence of posterior interferences The non-working side](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-13.jpg)
Features Of Ideal Occlusion C) Absence of posterior interferences The non-working side
![Features Of Ideal Occlusion D) Centric Occlusion is achieved at centric relation position E) Features Of Ideal Occlusion D) Centric Occlusion is achieved at centric relation position E)](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-14.jpg)
Features Of Ideal Occlusion D) Centric Occlusion is achieved at centric relation position E) Occlusal loads are axially transmitted through the teeth
![Organization Of Occlusion • There are three recognized concepts that describe how teeth should Organization Of Occlusion • There are three recognized concepts that describe how teeth should](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-15.jpg)
Organization Of Occlusion • There are three recognized concepts that describe how teeth should contact in various mandibular positions 1. Bilateral balanced occlusion 2. Unilateral Balanced occlusion (Group function) 3. Mutually protected occlusion (Canine protected)
![Bilateral Balanced Occlusion • It dictates that a maximum number of teeth should contact Bilateral Balanced Occlusion • It dictates that a maximum number of teeth should contact](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-16.jpg)
Bilateral Balanced Occlusion • It dictates that a maximum number of teeth should contact in all excursive positions of the mandible. • Use for complete denture occlusal scheme as contacts on non-working side prevent tipping of the denture • Not used for fixed prosthodontics, as very difficult to achieve
![Unilateral Balanced Occlusion • Also called group function • It requires teeth on the Unilateral Balanced Occlusion • Also called group function • It requires teeth on the](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-17.jpg)
Unilateral Balanced Occlusion • Also called group function • It requires teeth on the working side to be in contact in lateral excursion and teeth on the non-working side are free of any contact. • Avoids destructive , oblique forces on the nonworking side. • Prevents wear of maxillary palatal and mandibular buccal cusps
![Mutually Protected Occlusion • Also called canine protected occlusion • Anterior teeth overlap prevents Mutually Protected Occlusion • Also called canine protected occlusion • Anterior teeth overlap prevents](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-18.jpg)
Mutually Protected Occlusion • Also called canine protected occlusion • Anterior teeth overlap prevents the posterior teeth from making any contact on either the working or the nonworking sides during mandibular excursions. • Anterior teeth bear all the load and the posterior teeth are dis-occluded during excursions. Protecting the posterior teeth • In CO, posterior teeth direct forces through their long axis and anterior teeth are slightly in or out of contact. Protecting the anterior teeth.
![Guidance Describes the influenced path the mandible takes as a result of the contacting Guidance Describes the influenced path the mandible takes as a result of the contacting](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-19.jpg)
Guidance Describes the influenced path the mandible takes as a result of the contacting surfaces of the teeth. Depending on the contact and shape of the teeth they should be in harmony
![Protrusive Guidance Influenced path the mandible takes as a result of a forward thrust Protrusive Guidance Influenced path the mandible takes as a result of a forward thrust](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-20.jpg)
Protrusive Guidance Influenced path the mandible takes as a result of a forward thrust
![Lateral Guidance • Canine • Describes the way in which lateral excursions are affected Lateral Guidance • Canine • Describes the way in which lateral excursions are affected](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-21.jpg)
Lateral Guidance • Canine • Describes the way in which lateral excursions are affected by tooth to tooth contacts involving the canine teeth only resulting in disclusion of the posterior teeth
![Lateral Guidance • Group function • When lateral excursions are guided by more than Lateral Guidance • Group function • When lateral excursions are guided by more than](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-22.jpg)
Lateral Guidance • Group function • When lateral excursions are guided by more than one tooth other than the canines
![Anterior Guidance • Guidance produced by the teeth themselves and not the temporomandibular joint Anterior Guidance • Guidance produced by the teeth themselves and not the temporomandibular joint](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-23.jpg)
Anterior Guidance • Guidance produced by the teeth themselves and not the temporomandibular joint (can be on any tooth) • The influence of contacting surfaces of anterior teeth on mandibular movements. • The influence of contacting surfaces of the guide pin and anterior guide table on articulator movements. • The fabrication of a relationship of the anterior teeth preventing the posterior tooth contact in all eccentric mandibular movements.
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![Posselt’s Figure Posselt’s Figure](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-29.jpg)
Posselt’s Figure
![Posselt’s Figure MP ICP RCP HA MP = Maximal protrusion ICP = Intercuspal position Posselt’s Figure MP ICP RCP HA MP = Maximal protrusion ICP = Intercuspal position](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-30.jpg)
Posselt’s Figure MP ICP RCP HA MP = Maximal protrusion ICP = Intercuspal position RCP= Retruded Contact position HA = Hinge axis MO = Maximum opening MO
![Posselt’s Figure – top edge MP ICP IG RCP EE Posselt’s Figure – top edge MP ICP IG RCP EE](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-31.jpg)
Posselt’s Figure – top edge MP ICP IG RCP EE
![](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-32.jpg)
![Definitions Articulators – A mechanical representation of the jaws and temporo-mandibular joints Definitions Articulators – A mechanical representation of the jaws and temporo-mandibular joints](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-33.jpg)
Definitions Articulators – A mechanical representation of the jaws and temporo-mandibular joints
![Use of articulators Diagnosis • slides and occlusal relationships Treatment planning • Diagnostic wax Use of articulators Diagnosis • slides and occlusal relationships Treatment planning • Diagnostic wax](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-34.jpg)
Use of articulators Diagnosis • slides and occlusal relationships Treatment planning • Diagnostic wax - up • Occlusal adjustment Fabrication of Splint / Prostheses
![Articulators Types – Simple Hinge – Average Value – Semi-adjustable – Fully adjustable Articulators Types – Simple Hinge – Average Value – Semi-adjustable – Fully adjustable](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-35.jpg)
Articulators Types – Simple Hinge – Average Value – Semi-adjustable – Fully adjustable
![Articulators Articulators](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-36.jpg)
Articulators
![Cast Holder Cast Holder](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-37.jpg)
Cast Holder
![Cast Holder Cast Holder](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-38.jpg)
Cast Holder
![Average Value Average Value](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-39.jpg)
Average Value
![Articulators BONWILL 1854 4” 4” Articulators BONWILL 1854 4” 4”](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-40.jpg)
Articulators BONWILL 1854 4” 4”
![Articulators Average Value 4” 4” Articulators Average Value 4” 4”](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-41.jpg)
Articulators Average Value 4” 4”
![Articulators Average Value Articulators Average Value](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-42.jpg)
Articulators Average Value
![Articulators Articulators](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-43.jpg)
Articulators
![Denar II - Arcon Denar II - Arcon](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-44.jpg)
Denar II - Arcon
![Dentatus Non Arcon Dentatus Non Arcon](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-45.jpg)
Dentatus Non Arcon
![Denar II Adjustable Condylar Angle, ISS & PSS Denar II Adjustable Condylar Angle, ISS & PSS](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-46.jpg)
Denar II Adjustable Condylar Angle, ISS & PSS
![Articulators Semi-adjustable Can alter; • TMJ to Incisor distance • Bennett Angle • Condylor Articulators Semi-adjustable Can alter; • TMJ to Incisor distance • Bennett Angle • Condylor](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-47.jpg)
Articulators Semi-adjustable Can alter; • TMJ to Incisor distance • Bennett Angle • Condylor Guidance Angle • Incisal guidance plate
![Articulators • Needs Facebow recording • Ideally should be used for complete denture cases Articulators • Needs Facebow recording • Ideally should be used for complete denture cases](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-48.jpg)
Articulators • Needs Facebow recording • Ideally should be used for complete denture cases
![Facebow recording For semi adjustable articulator Facebow recording For semi adjustable articulator](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-49.jpg)
Facebow recording For semi adjustable articulator
![Facebow Facebow](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-50.jpg)
Facebow
![](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-51.jpg)
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![Summary The choice of articulator depends upon such factors as; – Intended use - Summary The choice of articulator depends upon such factors as; – Intended use -](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-54.jpg)
Summary The choice of articulator depends upon such factors as; – Intended use - Skill of the technician – Availability of equipment - Expense – Patient's occlusion - Skill of the operator – The more closely the articulator matches the patients anatomy, usually the better the outcome and the less adjustment is required at chairside on fitting prostheses.
![Key note messages • No articulator is best and no one can record all Key note messages • No articulator is best and no one can record all](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-55.jpg)
Key note messages • No articulator is best and no one can record all jaw movements • Articulator can try to record only jaw movements not reproduced anatomy of joint.
![THANK YOU THANK YOU](http://slidetodoc.com/presentation_image_h2/604834384c06b51c706367e66bff522a/image-56.jpg)
THANK YOU
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