19. FEARTURES! SKELETAL DENTAL Increased lower anterior facial height. Decreased upper anterior facial height. A steep mandibular plane angle. Small mandibular body and ramus. Proclined upper teeth. The upper and lower anteriors fail to overlap each other. The patient may have a narrow maxillary arch duo to lowered tongue posture duo to a habit.
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31. POSTERIOR OPEN BITE DEF. is a condition characterized by lack of contact between the posteriors when the teeth are in centric occlusion.
36. After the tooth emerges from the bone, pressure from soft tissue interposed between teeth (cheek, tongue, finger) can be an obstacle to eruption.
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38. Remove the cause. Lateral tongue spikes (to avoid tongue thrust). Extrusion of the posteriors forcefully. Infraocclusion by crowns to restore normal occlusal level.
44. This overlapping of the mandibular teeth occurs both the horizontal as well as vertical direction. The horizontal overjet The vertical overbite
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47. Deep bite can be broadly classified into : Skeletal dental
48. SKELETAL DEEP BITE Genetic origin. Caused by upward and forward rotation of the mandible, which can be worsen by a downward and forward inclination of the maxilla!!!
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50. SKELETAL DEEP BITE Features: Pt exhibit horizontal growth pattern The anterior facial height is reduced A reduced inter-occlusal clearance (freeway space)
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55. DENTAL DEEP BITE This kind of deep bite is characterized by the absence of any skeletal complicating features that are seen in skeletal deep bites. Dental deep bite occur duo to over-eruption of anteriors OR infra-occlusion of posterior.
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58. Deep bite duo to over-eruption of anteriors: is usually seen in class II malocclusion. The presence of an overjet allows the lower incisors to over-erupt, until they meet the palatal mucosa. The pt hence exhibit an excessive curve of spee.
59. Deep bite duo to infra-occlusion of molars : the presence of a large tongue posture or lateral tongue thrust may prevent the molars from erupting to their normal occlusal level. It can also occur due to premature loss of posterior teeth.
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62. Removable Hawley’s appliance + Adam’s clasps on the molars for retention. Myofunctional activator desinged and trimmed to allow the extrusion. Bionator can also be used.
