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Comparative evaluation of 2 skeletally anchored maxillary protraction protocols
Mohammed H Elnagar1, Eman Elshourbagy2, Safaa Ghobashy2
1Assistant lecturer, Department of Orthodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt; visiting scholar, Department of Orthodontics, College of Dentistry, University of Illinois at Chicago, Chicago, Ill.
Bone-anchored maxillary protraction effectively treats Class III malocclusion. Class III elastics with specific miniplate placement offered better control of vertical changes and mandibular incisor position compared to other skeletal anchorage methods.
Area of Science:
- Orthodontics
- Craniofacial Development
- Skeletal Anchorage
Background:
- Class III malocclusion is characterized by maxillary deficiency.
- Maxillary protraction aims to correct this deficiency.
- Bone anchorage offers enhanced stability for orthodontic movements.
Purpose of the Study:
- To compare two bone-anchored maxillary protraction protocols.
- To evaluate their efficacy against an untreated control group.
- To assess effects on skeletal and dental changes in Class III patients.
Main Methods:
- Thirty growing Class III patients with maxillary deficiency were divided into three groups.
- Group 1: Facemask with zygomatic buttress miniplates.
- Group 2: Class III elastics from infrazygomatic to symphyseal miniplates.
- Group 3: Untreated control.
Main Results:
- Both protraction groups showed significant forward maxillary movement compared to controls.
- Overjet and maxillary incisor display improved without undesirable tooth movement.
- Group 2 demonstrated better control of mandibular rotation and incisor inclination.
Conclusions:
- Both skeletal anchorage protocols effectively corrected maxillary deficiency in Class III patients.
- Class III elastics from infrazygomatic to symphyseal miniplates provided superior control of vertical dimension and mandibular incisor position.
