Interaction Between Subspinale and Two Expansion Protocols in Class III
ABDELRAZIK YOUSIF, A., Elshenaway, M., Abotaha, N., Farag, M. (2021). Interaction Between Subspinale and Two Expansion Protocols in Class III. EKB Journal Management System, 24(4), 443-455. doi: 10.21608/ajdsm.2021.92139.1229
ATIA ABDELWARETH ABDELRAZIK YOUSIF; Mahmoud Ebrahim Elshenaway; Neven Fakhry Abotaha; Mohamed Ali Farag. "Interaction Between Subspinale and Two Expansion Protocols in Class III". EKB Journal Management System, 24, 4, 2021, 443-455. doi: 10.21608/ajdsm.2021.92139.1229
ABDELRAZIK YOUSIF, A., Elshenaway, M., Abotaha, N., Farag, M. (2021). 'Interaction Between Subspinale and Two Expansion Protocols in Class III', EKB Journal Management System, 24(4), pp. 443-455. doi: 10.21608/ajdsm.2021.92139.1229
ABDELRAZIK YOUSIF, A., Elshenaway, M., Abotaha, N., Farag, M. Interaction Between Subspinale and Two Expansion Protocols in Class III. EKB Journal Management System, 2021; 24(4): 443-455. doi: 10.21608/ajdsm.2021.92139.1229

Interaction Between Subspinale and Two Expansion Protocols in Class III

Al-Azhar Journal of Dental Science
Article 3, Volume 24, Issue 4, October 2021, Pages 443-455    PDF (2.29 M)
Document Type: Original Article
DOI: 10.21608/ajdsm.2021.92139.1229
Authors
ATIA ABDELWARETH ABDELRAZIK YOUSIF* 1; Mahmoud Ebrahim Elshenaway2; Neven Fakhry Abotaha2; Mohamed Ali Farag2
1DEPARTMENT OF ORTHODONTICS,FACULTY OF DENTISTRY, TANTA UNIVERSITY, EGYPT
2Orthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt.
Abstract
ABSTRACT
Objectives: to assess and compare skeletal,dental and soft tissue changes of three RME protocols using conventional Hyrax, Hybrid Hyrax, and four miniscrew supported Hyrax using alternated expansion and constriction. Methods: 21 patients enrolled in this study with Class III maxillary deficiency, with an average age of 10.5±6 months, and allocated into three groups of seven patients each. Maxillary expansion was done with conventional Hyrax in Group I. Group II: RME with Hybrid Hyrax. Group III: skeletal four-point supported custom-made Hyrax with four palatal micro-implants and alternating rapid maxillary expansion and contraction. A cephalometric tracing of standardized cephalometric x-ray was performed for each patient before and after expansion for various linear and angular measurements and statistically analyzed Results: SNA angle increased significantly (p ≤ 0.05) from pretreatment to post-expansion stage in all groups. There was a statistically significant difference between Groups II and III. When the three Groups were compared, a considerable forward movement of point A was detected in both Group I and Group II. The forward movement of point A, the angle of facial convexity and upper lip prominence improved considerably in GII. Conclusion: Hybrid Hyrax (Group II) showed a significant improvement in forward position of point A concomitant with a significant sagittal skeletal, dental and soft tissue profile improvement.
Keywords
Hyrax; palatal micro-implant; rapid maxillary expansion; alternating palatal expansion and contraction
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