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Molar and incisor changes with Wilson rapid molar distalization
D S Muse1, M J Fillman, W J Emmerson
1Loma Linda University, School of Dentistry, Calif.
Summary
Class II molar correction using Wilson rapid molar distalization achieved significant maxillary molar movement (2.16 mm) and corrected molar relations by 4.1 mm. Mandibular molars moved mesially, potentially reducing arch length.
Area of Science:
- Orthodontics
- Dental Biomechanics
Background:
- Class II malocclusion is a common dental issue.
- Effective molar distalization is crucial for orthodontic treatment.
- The Wilson rapid molar distalization technique offers a method for Class II correction.
Purpose of the Study:
- To quantify the maxillary and mandibular first molar and incisor changes during Class II molar correction.
- To evaluate the effectiveness of the Wilson rapid molar distalization technique.
Main Methods:
- Nineteen patients with Class II malocclusion were treated with maxillary bimetric distalizing arches and various mandibular arch configurations.
- Activations included open coil springs and Class II elastics.
- Lateral cephalometric radiographs and Ricketts superimpositions were used to measure dental changes before and after treatment.
Main Results:
- A mean molar relation correction of 4.1 mm was achieved.
- Maxillary first molars were distalized by a mean of 2.16 mm with 7.8 degrees of tip.
- The rate of maxillary molar movement was 0.56 mm per month.
- Mandibular molars showed a mean mesial movement of 1.38 mm.
Conclusions:
- The Wilson rapid molar distalization effectively corrected Class II molar relationships.
- Maxillary molar distalization occurred at a predictable rate.
- Mandibular molar mesial movement was observed, potentially impacting mandibular arch length.
