Open AccessComparison of skeletal and dentoalveolar changes between pure bone-borne and hybrid tooth-borne and bone-borne maxillary rapid palatal expanders using cone-beam computed tomography
Author(s) -
Mohamad Sarraj,
Sercan Akyalçın,
Hong He,
Jun Xiang,
Ghaddy AlSaty,
Tugce Celenk-Koca,
Christina DeBiase,
Chris Martin,
Khaled AlSharif,
Peter Ngan
Publication year - 2021
Publication title -
apos trends in orthodontics
Language(s) - English
Resource type - Journals
eISSN - 2321-4600
pISSN - 2321-1407
DOI - 10.25259/apos_160_2020
Subject(s) - cone beam computed tomography , medicine , dentistry , reduction (mathematics) , dental alveolus , molar , buccal administration , orthodontics , fibrous joint , bone density , computed tomography , osteoporosis , mathematics , surgery , geometry , endocrinology
Objectives: The objectives of the study were to compare the skeletal, dentoalveolar, and periodontal changes between two types of microimplant-assisted rapid maxillary expansion appliances: The bone-anchored maxillary expanders (BAME) and the tooth-bone-anchored maxillary skeletal expander (MSE). Materials and Methods: Thirty-four patients with a transverse maxillary deficiency were divided into two groups; the first group (16 patients, average age 14.9 years) was treated with the MSE appliance, and the second group (18 patients, average age 13.8 years) was treated with the BAME appliance. Cone-beam computed tomography scans were taken at pre-treatment (T1) and immediately post-expansion (T2) to measure the changes in midpalatal suture opening, total expansion (TE), alveolar bone bending, dental tipping (DT), and buccal bone thickness. Data were analyzed using paired t -test and two-sample t -test. Results: Midpalatal suture separation was found in 100% of the patients in both groups. The TE at the first molar was 5.9 mm in the MSE group and 4.7 mm in the BAME group. The skeletal contributions were 56% and 83% of TE for the MSE and BAME groups, respectively. Significantly less dental buccal tipping and buccal bone loss were found with the BAME group. The midpalatal suture in both groups exhibited a parallel opening pattern in the axial plane. Conclusion: The use of BAME appliance resulted in greater skeletal effects, less dental tipping, and less buccal bone reduction compared to MSE appliance (immediately after maxillary expansion).