Document Type : Original Article
Authors
1
MSc Student, MSc Candidate, Orthodontic Department, Cairo University, Egypt
2
MSc Student, Orthodontic Department, Cairo University
3
Instructor, Orthodontic Department, Cairo University
4
Professor, Orthodontic Department, Cairo University, Egypt
Abstract
Introduction
Transverse maxillary deficiency (TMD) is characterized by a narrow palate, posterior crossbite, crowding, and reduced nasal cavity volume. In early adolescence, rapid palatal expansion is the preferred treatment, while in late adolescence and adulthood, mid-palatal sutures fuse, making expansion more difficult and potentially causing side effects.
Mini-screw assisted rapid palatal expansion (MARPE) has recently introduced as an alternative to surgically assisted rapid palatal expansion (SARPE). TMD may be observed in both Class II and Class III malocclusions, and maxillary expansion may alter the anteroposterior relationship of the jaw.
Study Objective
The study aimed to evaluate changes in anteroposterior and vertical dimensions through cephalometric analysis after MARPE treatment.
Methodology
• Ethical approval was obtained from Cairo University's local research ethics committee.
• Ten patients (4 males, 6 females) underwent treatment using four mini-screws hybrid hyrax appliances supported.
• Pre- and post-expansion photographs and lateral cephalometric radiographs were taken.
• Statistical methods included mean, standard deviation, median, and range.
Results
• ANB angle increased by 1.2 ± 0.2°, attributed to a increase in SNA angle (0.9 ± 0.3°) and a decrease in SNB angle (−0.3 ± 1.7°), though results were statistically insignificant.
• The mandible showed a slight backward rotation, indicated by a decrease in SNB angle and an increase in mandibular plane angles.
Conclusion
MARPE treatment led to a statistically insignificant advancement of the maxilla and mild backward rotation of the mandible, resulting in a minor increase in ANB and reduced anterior facial height.
Keywords
Main Subjects
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