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32191006 orientation-jaw-relation-prostho


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32191006 orientation-jaw-relation-prostho

  1. 1. ORIENTATIONLaunch Strategies• Launch planJAW – If product is being announced RELATION• Promotion budget – Supply back up material with detailed budget information for Phase 1 Phase 2 review Phase 3 Jan Feb Mar Apr May Jun July Aug Sep Oct Nov Dec
  2. 2. TerminologyAdjustment o the occlusal rimHinge axis location techniqueJaw relation introduction classificationOrientation jaw relation face bow
  3. 3. T RM E INOLOGY :H inge axis An imaginary line through the two mandibular: condyles & around which the mandible may rotate without translatory movement.T opening heaxis : It is an imaginary line around which the condyles may rotate during opening & closing movements of the mandible.Terminal hinge position : It is the most retruded hinge position. In this condyles are in definite position in fossae.
  4. 4. ADJ M NT OF T E OCCL UST E H USAL RIM Market SummaryFactors to be considered are : • Market: past, present, & future – Review changes in market share, leadership, Lip support & labial fullness players, market shifts, costs, pricing, Overjet competition Check support & buccal fullness Market/ Mass Followers Level of the occlusal plane Number of customers Early Adopters/ Orientation of plane of occlusion Pioneers End of Life Time
  5. 5. L support & labial fullness : ip Product Definition Wax in the flange area responsible for the labial fullness. • Describe product/service being Wax in the incisal edge of the occlusal rim determines marketed the lip support.Overjet : The incisal edge of the maxillary occlusal rim should be around 2mm in front of the incisal edge of the mandibular occlusal rim.
  6. 6. Cheek support & buccal fullness : Competition If the occlusal rims have excess wax buccally , the buccal musculature will produce displacement of the occlusal rim. • arranged buccally later Teeth The competitive may produce frequent cheek biting. landscapeLevel of the occlusal rim : – Provide an overview of product A B Price competitors, their The upper occlusal rim should be reduced upto or2mm below the strengths and level of the upper lip during speech. weaknesses D – Position rim should be at the level C the lower lip & The lower occlusal each of the anglecompetitor’s posteriorly at the 2/3rd the height of the of the mouth ; product retro molar pad. new product against Performance
  7. 7. Orientation of the plane of the occlusalrim : Competition The plane of the occlusal rim should be • The competitive to the plane of the maxilla. parallel landscape The plane of the maxilla is determined – Provide an overview Anteriorly by inter pupillary line of product A B Price competitors, their Posteriorly by ala tragus line strengths and weaknesses The maxillary occlusal plane can be D verified by using a FOX PLANE. C – Position each competitor’s product it should be parallel to the Anteriorly Performance against newinterpupillary line & posteriorly to the ala product tragus line.
  8. 8. H inge axis locationtechnique : Make an accurate impression of an mandibular basal seat. Pour an accurate stone cast. Make an accurate record base of self cure resin. Attach the occlusal rim to the record base. A specially designed bite fork to the rims with the stem parallel to the sagittal plane.
  9. 9. Attach this assembly to themandible with chin clampsor chin straps.Attach the hinge bow to thestem & adjust the styli to thelocation of the condyles.Guide the patient in makinghinge openings & closings.
  10. 10. JAW RE AT L ION : Competition It is defined as the any • The competitive relation ofoverviewmandible - landscape – Provide an the theproduct their part of the B of movable A Price competitors, stomatognathic system , with strengths and weaknesses D the– maxilla - the immovable Position each C competitor’s product against the fixed part. or new product Performance
  11. 11. Classification of the jaw relation : Competition Arbitrary Orientation jaw • The competitive relation landscape Actual – Provide an overview of product At rest B Vertical jaw their A Price competitors, relation and strengths At occlusal weaknesses D C – Position each competitor’s product Centric Performance Horizontal jaw relation new product against Eccentric
  12. 12. ORIE AT NT ION JAW RE AT L ION : Competition To orient to locate. • The competitive It is the jaw relation when the mandible is landscape kept– in its mostoverview position , it can Provide an posterior rotate in the sagittal plane around A of product an B Price competitors, their imaginary transverse axis passing through strengths and or near the condyles. weaknesses D C – Position each The position of the maxilla or mandible in competitor’s product Performance the skull is recorded using an instrument against new product called the face bow.
  13. 13. T face bow : he Competition It is a caliper like device that is used to record the relationship of the jaws to • The competitive thelandscape opening axis of the jaw & to orient the casts in this same relationship to the – Provide an overview opening axis of the articulator. of product A B Price competitors, theirPurpose ; strengths and weaknesses D Is toPosition each – orient the maxillary cast to the articulator in C the same relationship to the opening & closing competitor’s product axisagainst new productexists between the maxilla of the articulator as Performance & the opening and closing axis in the TMJ.
  14. 14. Review of the face bow: In 1880 HAYES used a tong like device which he called caliper. GYSI developed an instrument similar to a face bow primarily to record the paths of the condyles. SNOW introduced the snow face bow.
  15. 15. It consists of : U shaped frame Bite fork Condylar rods Orbital pointer Locking device
  16. 16. U shaped frame : It forms the main frame of the face bow. All the other components are attached to the frame with the help of the clamps. Extend from TMJ to at least 2- 3 inches anterior to the face.Condylar rods : Two small metallic rods which are present on the either side of the frame. Help in locating the hinge axis or opening axis of the TMJ. Some have ear piece which fits into the external auditory meatus.
  17. 17. B fork : ite It is a u shaped plate , which is attached to the occlusal rims. It is attached to the frame with the help of a rod called the stem.Locking device : It supports face bow , occlusal rim and cast during articulation. It consists of transfer rod and transverse rod.Orbital pointer: Used to mark the anterior reference point ( infraorbital notch ). It is present only in arbitrary face bow.
  18. 18. Types of face bow :Arbitrary face bow Kinematic face bow Facia type Ear piece type Hanau face bow ( spring bow ) Slidematic ( denar ) Whipmix Twirl bow
  19. 19. Face bow transfer procedure : Preliminary steps : Seat the patient in the comfortable position ; patients head should be in the upright position with the head rest supporting the occiput . Locate the axis point by measuring 12 millimeters anteriors to the middle of the tragus of the ear on a line drawn from the outer canthus of the eye to the middle of the tragus of the ear.
  20. 20. Mark the points on the skin.Contour the maxillary occlusion rim ;establish the occlusal plane ; place the guide lines for the arranging of teeth on the labialsection.Mount index on the occlusal surface in the regions of the firstmolars.Apply a thin layer of the petroleum to the occlusal rimsReduce the mandibular occlusal rim to allow adequateinterocclusal distance for the fork & attached wax.Adjust the condyle rods to the face for centering the bow.
  21. 21. Face bow record : Soften a sheet of low fusing base plate wax and roll together in the shape of a horseshoe. While the wax is soft , bite fork is embedded in it. Place the prongs of the bite fork with the attached soft wax between the occluding surfaces of the occlusal rim. Instruct the patient to close the jaws until both occlusal rims are embedded in the soft wax. Slide the stem of the fork through the opening in the clamp of the bow. Adjust the condylar rods to the arbitrary axis points.
  22. 22. Adjust the width of the condyle rods equidistantbilaterally & secure the clamp of the bow to thestem of the bite fork.Slide the condyle rods from the skin. extend thecondyle rods back to the axis points to check anydisplacement.When the infra orbital notch is used as the anteriorpoint of reference the pointer should be placed inthe clamp provided for it on the bow.
  23. 23. References : Charles m. heartwell , arthur o. rahn ; syllabus of complete denture ; 4th edition. George a. zarb , charles l. bolender ; boucher s prosthodontic treatment for edentulous patients ; 10th & 12th edition. Sheldon winkler ; essentials of complete denture prosthodontics ; 2nd edition.