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Similar to 9. anterior teeth arrangement
9. anterior teeth arrangement
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- 3. Learning outcomes 1. Explainindividual anterior tooth arrangement. 2. Compare horizontal and vertical overlap. 3. Define what is incisal guidance.
- 4. Cast Landmarks Mark thecasts indicating midline, crest of the ridge, and the midpoint of the retromolar pad. These landmarks will be used to check your arrangement. maxilla mandible Incisive papilla midline Anterior land area Ridge crest Retromolar pad
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- 6. Lines indicating thecrest of the ridge Midpoint of retromolar pad Mark on land indicating the midpoint of the retromolar pad Land
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- 10. The mesial ofeach tooth should be on the midline (arrow) and the incisal edge should be parallel to and in contact with the occlusal plane. Central incisors
- 11. Viewed from thefacial aspect, the maxillary central incisor is placed so that the long axis shows a slight mesial inclination to the perpendicular. Central incisors
- 12. When viewed from profilethe cervical aspect of the tooth should be slightly depressed. Note that the incisal 2/3 of the central incisors are perpendicular to the plane of occlusion Inner edge of the land Occlusal plane Central incisors
- 13. The maxillary lateralincisor should be positioned with a slight mesial inclination and is usually ½ to 1 mm above the plane of occlusion. Lateral incisors
- 14. When viewed inprofile note that the lateral incisor is positioned with a slight mesial inclination in relationship with the central incisor. Note again that the lateral incisor is positioned slightly above the plane of occlusion. Lateral incisors
- 15. When viewed fromthe occlusal, the incisors follow the curvature of the internal aspect of the land. Lateral incisors
- 16. When viewed inprofile the cuspid has a slight mesial inclination from the perpendicular and the incisal tip touches the occlusal plane (arrow). Cuspids
- 17. “Toed-in” Position Note howthe cervical and incisal edges of the cuspid are aligned vertically (yellow line). The facial surface of the cuspid however, is canted inward and appears “toed in” (red line) due to the prominence of the cervical area of the tooth (yellow arrow). Cuspids
- 18. The cuspid hastwo planes on the labial surface – a mesial plane (yellow line) and a distal plane (red line). When viewed from the anterior only the mesial plane should be visible. Cuspids
- 19. When viewed fromthe occlusal the anterior teeth follow the curvature of the internal portion of the land.
- 20. Note the inclinationsof the anterior teeth.
- 21. Incisive papilla asa biometric guide: The relation of Central incisor is 8-10 mm anterior to the incisive papilla The relation of canine is perpendicular to the incisive papilla in the sagital plane
- 23. Axial Inclination ofMaxillary Anteriors in the “Basic” Arrangement.
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- 25. Horizontal overlap /Overjet:the projection of teeth beyond their antagonists in the horizontal plane.
- 26. Vertical overlap/Overbite: thedistance teeth lap over their antagonists as measured vertically.
- 27. The purpose ofhorizontal and vertical overlap are for the purpose of esthetics, phonetics and function of balance in protrusion.
- 28. Vertical overlap 0.5-1 mm Horizontaloverlap 2 mm
- 29. The mandibular central incisors areset with the long axis perpendicular to the occlusal plane with the neck depressed. The mandibular lateral incisors are set with a slight mesial inclination.
- 30. Axial Alignment ofMandibularAxial Alignment of Mandibular Anterior Denture TeethAnterior Denture Teeth A. Facial View.A. Facial View. B. Proximal View.B. Proximal View. B A
- 31. The mandibular canines have more mesialinclination than the lateral incisors and the neck is set prominently.
- 32. The cuspid isslightly inclined to the mesial.
- 33. The horizontal overlapshould be consistent throughout the anterior region. At this stage it should be about 2 mm.
- 34. Incisal Guidance 1: theinfluence of the contacting surfaces of the mandibular and maxillary anterior teeth on mandibular movements.
- 38. Incisal Guidance 2: theinfluences of the contacting surfaces of the guide pin and guide table on articulator movements
- 40. In denture construction,the mandibular incisors should never touch the maxillary incisors in centric occlusion and the incisal guide angle should be kept as low as possible to enhance free movement of the teeth in protrusive and lateral excursions.
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Editor's Notes
- #5 Mark middle of retromolar pad Central grooves .. Lower teeth on the line
- #6 Incisive papilla..
- #11 Square tapered teeth are his favorite. They have long contact point… best to not show too much gingiva.. Looks more real. Some ovoid molds… only have a small low contact … will end up with large papilla that doesn’t look nice.. So he uses square tapering teeth almost exclusively.
- #14 Laterals slightly above the plane of occlusion, can depress the necks a little bit to get diff light reflection. And inclined slightly distally.
- #16 If you have trimmed cast correctly, teeth will follow outline of the land.
- #17 Move necks of cuspids out, rotate distally.
- #18 Only see one half of the cuspid. Will not see distal lobe ..
- #19 Cuspid has two incisal edges. Mesial incisal edge should follow the other anterior teeth. The distal edge will follow central fossa of posterior teeth. Looks more realistic. Don’t want big bold flat cuspids. Will look awful .
- #20 Silver dollar look lab techs would take silver dollar and set teeth along it.. And it would fit perfectly Can use plastic ruler On top of it there is a circle – if you place inside the arch – set along it --- will follow it exactly [silver dollar set up] Also tapered edge on one end – generally taper of anterior teeth Mm rule lines at 18 and 22 to measure length of wax rims On flat smaller end letters – mark rims at cuspids take ruler and measure btw cuspids, gives you letter for anterior tooth selection [x, e etc]
- #34 Check for this space when setting lower anteriors must be consistent. Look from underneath… [he skipped through most slides]