Abstract
Objective: The aim of this prospective study was to assess potential changes in the cephalometric craniofacial growth pattern of 17 children presenting Angle Class III malocclusion treated with a Haas-type expander com- bined with a face mask. Methods: Lateral cephalometric radiographs were taken at beginning (T 1 ) and immediately after removal of the ap- pliances (T 2 ), average of 11 months of treatment. Linear and angular measurements were used to evaluate the cranial base, dentoskeletal changes and facial growth pattern. Results: The length of the anterior cranial base experienced a reduction while the posterior cranial base assumed a more vertical position at T 1 . Some maxillary movement occurred, there was no rotation of the palatal plane, there was a slight clockwise rotation of the mandible, although not significant. The ANB angle increased, thereby im- proving the relationship between the jaws; dentoalveolar compensation was more evident in the lower incisors. Five out of 12 cases (29.41%) showed the following changes: In one case the pattern became more horizontal and in four cases more vertical. Conclusions: It was concluded after a short-term assessment that treatment with rapid maxillary expansion (RME) associated with a face mask was effective in the correction of Class III malocclusion despite the changes in facial growth pattern observed in a few cases.
Highlights
IntroductionClass III malocclusion defined as a facial skeletal discrepancy, may result from a variety of morphological combinations between maxilla and mandible, both in the sagittal direction (mandibular prognathism, maxillary retraction, or a combination thereof ) and in the vertical direction (excess or decrease in lower anterior facial height).[1,2,9,27,30]It has been estimated that the prevalence of Class III malocclusion among Japanese and Chinese is around 14% of the population.[19]
Class III malocclusion defined as a facial skeletal discrepancy, may result from a variety of morphological combinations between maxilla and mandible, both in the sagittal direction and in the vertical direction.[1,2,9,27,30]It has been estimated that the prevalence of Class III malocclusion among Japanese and Chinese is around 14% of the population.[19]
Five out of 12 cases (29.41%) showed the following changes: In one case the pattern became more horizontal and in four cases more vertical. It was concluded after a short-term assessment that treatment with rapid maxillary expansion (RME) associated with a face mask was effective in the correction of Class III malocclusion despite the changes in facial growth pattern observed in a few cases
Summary
Class III malocclusion defined as a facial skeletal discrepancy, may result from a variety of morphological combinations between maxilla and mandible, both in the sagittal direction (mandibular prognathism, maxillary retraction, or a combination thereof ) and in the vertical direction (excess or decrease in lower anterior facial height).[1,2,9,27,30]It has been estimated that the prevalence of Class III malocclusion among Japanese and Chinese is around 14% of the population.[19]. Class III malocclusion defined as a facial skeletal discrepancy, may result from a variety of morphological combinations between maxilla and mandible, both in the sagittal direction (mandibular prognathism, maxillary retraction, or a combination thereof ) and in the vertical direction (excess or decrease in lower anterior facial height).[1,2,9,27,30]. Before 1970, the orthodontic literature treated all Class III malocclusions as mandibular prognathism. The finding that maxillary deficiency is often a component of skeletal Class III enhanced the potential of orthodontic-orthopedic treatment in promoting maxillary growth.[3,5,6,18,27] by the time most of this growth is completed, treatment options become limited.[1,4,13]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
