The Nature of Orthodontic Problems and Malocclusion€¦ · PPT file · Web view ·...
Transcript of The Nature of Orthodontic Problems and Malocclusion€¦ · PPT file · Web view ·...
The focus of modern orthodontic treatment is on improving not only dental and skeletal but also soft tissue aspects of orthodontic problems, in
combination with other dental treatment as needed.
Epidemiology of Malocclusion• Ideal occlusion as defined by Angle is a rare
occurance• 65% of the US population present some type
of malocclusion
Crowding
• Space required by the dentition for all teeth to be aligned normally exceeds the space available in the dental arch.
• Rotations, incisor irregularity etc.
Malocclusion
• Less than 1% in the US
• Is a characteristic of Class III malocclusions
• Much more prevalent in Japan and China
Overbite • Overbite is the vertical
overlap of incisors.• 1-2mm overbite is
considered normal.• Excessive overbite is called
deep bite• >5mm overbite is
considered severed deep bite
• Overbite <0mm is called an open bite
Posterior Crossbite• Maxillary posterior teeth are lingually
positioned to mandibular posterior teeth.• Discrepancy in the widths of maxillary and
mandibular arches.• Can arise from dental causes as well
Diastema
• A space between two adjacent teeth is called a diastema.
• Maxillary midline diastema is most commonly seen in mixed dentition phase
Malocclusion
• Which ethnic group has the higher prevalence of midline diastemas
A. WhiteB. BlackC. Hispanic
Assigned reading
Contemporary Orthodontics: Chapter 1 Pg 3-22
Bhoomika Ahuja Department of Orthoodnitcs
[email protected] 3213