BANANA DE POSSELT PDF

Posselt's envelope of motion or Posselt's envelope of movement refers to the range of movement of the lower jaw bone, or mandible. Posselt's envelope is first described by Dr Ulf Posselt in It is a diagrammatic representation of a sagittal view of maximum mandibular movement. Posselt postulated that in the first 20mm of opening and closing, the mandible only rotates and does not simultaneously move downward and forward. In , [2] Posselt carried out some investigations on 65 dental students between the age of , in an attempt to examine the capacity of the mandible for movement in the occlusal and sagittal planes.

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Maximal Intercuspal Positionor Maximum IntercuspationThis is a position in which the maxillary andmandibular teeth make maximum surface contactwith each other. The mandible is elevated assuperiorly as possible in the sagittal plane. There is a degree ofelectromyographic activity. Physiologic Rest Positionmm The movement is exhibited as a measurement of thedistance between the medial pole of the non-working condyle and the medialwall of the glenoid fossa.

The outer range of movement isreproducible and called border movements. Distinct markings are produced thatare transferable to a fully adjustable articulator. Recording Paper Also known as Axes of RotationReference Planes Reference PlanesSagittal PlaneAlso known as a side view.

Reference PlanesSagittal Axis Therotational movementwill terminate at theTerminal Hinge AxisPosition. The condyles are rotatingcompletely within theglenoid fossa. It is areproducible andconsistent movement.

It is themost anterior of thepositions, whenviewed from thesagittal plane. Mandible isprotruded forwardfrom MI, maintainingsome type of toothcontact throughout. Mandible is continuingto protrude forwardfrom Edge-to-EdgeIncisal, maintainingsome type of toothcontact throughout. The teeth are in somedegree of contact usually in Premolar-Canine area andmandible is pushedforward as far aspossible. Going fromMaximum Protrusionto MaximumOpening. Horizontal AxisImaginary line through both condylesReference Planes Firsttooth contactwhen the condylesare maximallysituated in theglenoid fossa.

Maximum Intercuspationof the teeth in theHorizontal Plane. Border Movements in HorizontalPlane Reference PlanesFrontal PlaneBest described by facing the patient. Frontal AxisReference Planes MaximumIntercuspation of theteeth.

Border Movements in Frontal Plane Border Movements in FrontalPlane This is the mostinferior position. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later.

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