sheet 24.pdf - Dr Alau2019a 1st lecture Areen B Ammari Dr...

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Areen B. Ammari Dr Ala a Haddad Dr Ala’a 1st lecture
In our journey we face multiple patients, some with severe malocclusion, some with minimal malocclusion. Severe cases need ortho Tx, while mild malocclusion can be managed only by restorative approach, when orthodontic approach is not applicable for a reason or another. Lecture outline Understand the types of Malocclusion. Identify the consequences of Malocclusion that we can manage with restorative approach Discuss different restorative treatment modalities to manage Malocclusion. All slides and notes are included The lecture is super easy Occlusion It is the alignment of teeth and the way that the upper and lower teeth fit together (bite). In another words it is the way teeth align in the jaws and articulate to each other. Normal Occlusion: Upper teeth fit slightly over lower teeth. Molars cusp points fit the grooves of the opposite molar. Upper teeth protect cheeks and lips, from biting Lower teeth protect tongue. MB cusp of upper 1st molar is aligned with the buccal groove of lower 1st molar first molar. Proper teeth alignment Normal overbite and Overjet coincident Maxillary and Mandibular midlines. We can describe occlusion as NORMAL if all of the above features are fulfilled: Also causing no functional or aesthetic problems
Malocclusion a misalignment or incorrect relation between the teeth of the two dental arches when they approach each other as the jaws close. Any deviation from a physiologically acceptable contacts between opposing teeth. So, Any deviation from normal occlusion is malocclusion . sometimes malocclusion could happen without any adverse effect from the patient. ex, slight rotation on a central incisor, but the occlusion and the function are fine, aesthetics could be affected but the pt is happy >> this is considered as malocclusion >> but I don’t need to interfere! Another ex, patient has minimal crowding or spacing but he is happy with esthetics, BUT there’s a functional problem with his occlusion >> I have to interfere Causes of Malocclusion: Difference between the size of both jaws. ( Skeletal problem, can’t be treated only with conservative approach! ) Difference between the jaw and teeth size. Extra teeth, lost teeth, and impacted teeth Abnormally shaped teeth. Childhood habits: thumb sucking, tongue thrusting, pacifier. Ill-fitting dental restorations and prostheses. Temporomandibular disorders (TMDs) Trauma Jaws Misalignment following trauma or fracture. Malignancy Hereditary Forms of Malocclusion: (manifested in different forms and severity) Crowding or Spacing Upper teeth protrusion (overjet) Openbite, deep bite or crossbite. Infra-occlusion or Supra-eruption Ankylosis Rotation and Tilting (up to certain degree, can be managed using restorative approach Transposition (interchange in the position of two permanent adjacent teeth) Occlusal interferences Functional crossbite caused by an occlusal interference that cause anterior or lateral mandible shift, most of the time it’s managed by restorative approach

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