Orthodontics | Development of Occlusion | INBDE, ADAT

Step-by-Step Tutorial: Understanding the Development of Occlusion in Orthodontics

1. Gum Pad Stage:

   • This stage lasts from birth to six months.
   • At this stage, there are no teeth present, only gum pads.
   • Look for the incisive papilla and transverse grooves demarcating where each tooth bud is developing.
   • Understand the lateral sulcus and its significance in determining the interarch relationship.

2. Primary Dentition Stage:

   • Occurs from the eruption of the first primary tooth to the first permanent tooth.
   • Note the minimal overbite and overjet in young children during this stage.
   • Learn about spacing between primary incisors and the concept of incisor liability.

3. Mixed Dentition Stage:

   • Takes place from six to twelve years.
   • Watch for the ugly duckling stage where a gap between upper central incisors is normal.
   • Understand the transition of tooth eruption and the closure of spaces.

4. Permanent Dentition Stage:

   • Begins at twelve years and continues until adulthood or tooth loss.
   • Consider the natural curvature of the arches and ideal overbite and overjet measurements.
   • Learn about late lower incisor crowding and the factors contributing to it.

5. Analysis in Mixed Dentition Patients:

   • Perform a mixed dentition space analysis to predict crowding or spacing.
   • Understand different analyses like the Tanaka Johnston and Moyers space analysis for space prediction.

6. Arch Dimension Changes:

   • Measure intercanine width, intermolar width, arch length, and arch perimeter.
   • Note the differences in dimension changes between the upper and lower arches during the transition from mixed to permanent dentition.

7. Review and Additional Resources:

   • Review the stages of occlusion development: Gum Pad, Primary Dentition, Mixed Dentition, and Permanent Dentition.
   • Consider exploring further resources like the Mental Dental channel and Patreon page for additional content.

By following these steps, you can gain a comprehensive understanding of the development of occlusion in orthodontics across different stages of dental growth.