Evaluation of treatment changes associated with maxillary molar distalization with the distal jet appliance
| Autor: | Shruti Chhajed, Ashok Karad |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Molar
Orthodontics business.industry Overjet Lower lip Dentistry Overbite medicine.disease distal jet non-extraction approach Molar distalization Class II malocclusion lcsh:RK1-715 medicine.anatomical_structure Incisor stomatognathic system molar distalization lcsh:Dentistry medicine Maxillary first molar Maxillary molar business |
| Zdroj: | APOS Trends in Orthodontics, Vol 4, Iss 1, Pp 9-15 (2014) |
| ISSN: | 2321-1407 |
| Popis: | Objectives: Maxillary molar distalization is one of the non-extraction treatment options to gain space in the maxillary arch for the resolution of class II malocclusions. This retrospective clinical study was aimed at evaluating the nature of maxillary first molar movement after distalization with the distal jet and its effects on incisor position and facial soft-tissues. Materials and Methods: The study sample consisted of 22 subjects (10 boys, 12 girls) having an average age of 13.04 years at the time of obtaining pre-treatment diagnostic records. The distal jet was the only appliance used during the distalization phase of treatment. All patients were treated by a single clinician with strict adherence to a standardized treatment protocol. The average duration of molar distalization was 6.09 months. Pre-treatment and postdistalization lateral cephalograms were obtained to analyze dentoalveolar and soft-tissue changes. Results: This study revealed that the maxillary first molars were distalized by an average of 4.29 mm into a class I molar relationship. In the process, the molars exhibited distal molar tipping (6.66°) and extrusion (1.45 mm). The maxillary incisors were displaced and tipped labially by 1.89 mm and 2.84° respectively, leading to an increase in overjet by 0.86 mm and decrease in overbite by 0.98 mm. The soft-tissue changes involved upper and lower lip protrusion by 0.84 mm and 1.45 mm respectively, with an increase in lower facial height by 1.36 mm. Conclusion: This study confirmed the reliable and effective distalization of maxillary first molars with the distal jet, with certain undesirable and reciprocal effects on incisor position and minimal impact on the facial soft-tissues. |
| Databáze: | OpenAIRE |
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