Adult maxillary expansion : CBCT evaluation of skeletal changes and determining an efficiency factor between force-controlled polycyclic slow activation and continuous rapid activation for mini-screw-assisted palatal expansion - MASPE vs. MARPE
Walter, A. (Universitat Internacional de Catalunya)
Winsauer, H. (Private practice in Orthodontics)
Crespo, E. (Hospital Manuel Gea Gonzalez. ciudad de Mexico and Private practice)
Walter, D. (Universitat Internacional de Catalunya)
Winsauer, C. (Private practice in Orthodontics)
Schwärzler, A. (Medical University of Vienna)
Mojal, Sergi (Institut de Recerca Sant Pau)
Arcos, I. (Universitat Internacional de Catalunya)
Puigdollers, A. (Universitat Internacional de Catalunya)
Universitat Autònoma de Barcelona

Date:	2024
Abstract:	Aim: This consecutive retrospective study compared Mini-implant Assisted Slow Palatal Expansion (MASPE) with rapid palatal expansion (MARPE) using a bone-borne skeletal expander in adults with a narrow maxilla. CBCT scans analyzed transverse changes and potential pterygoid process deformation before (T1) and after expansion (T2). Materials and methods: The Force Controlled PolyCyclic (FCPC) SLOW palatal expansion group (FCPC-MASPE-G) comprised 35 adults aged 18-54 years and received a skeletal expander limiting expansive force only allowing 500 cN at the activation wrench (force control). Discontinuous, polycyclic activations according to the FCPC-protocol were applied. The MARPE-group (n = 6) underwent continuous RAPID activation without FCPC until the desired width was reached. CBCT scans were taken pre and post-expansion. Inclusion criteria for both groups were successful outcomes without surgical assistance. Results: The maxilla opened transversally in both groups mildly V-shaped, with a pyramidal shape in the coronal plane, impacting the zygomatic bone. Width measurements at T2 indicated superior mechanical response in FCPC-MASPE-G. Response of zygomaticomaxillary sutures was similar in both groups (p < 0. 001 to 0. 025). Pterygoid process deformations were notably less in FCPC-MASPE-G (0. 87-1. 35 mm, p < 0. 001) compared to MARPE-G (2. 70-3. 04 mm, p < 0. 001 to 0. 009). Dental measurements were similar (p < 0. 001 to 0. 023), but the ratio "Mid-palatal suture Opening Related to Expander opening" (M. O. R. E. -factor) was better with 84% in FCPC-MASPE-G than with 50% in MARPE-G. Conclusion: Slow expansion with FCPC protocol effectively widens the maxilla in adults, with significant impact on bones and sutures and less pterygoid process deformation compared to rapid expansion. Cranial complications were absent in both groups.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Cranial complications ; Cranial sutures ; MARPE ; Mid-palatal suture ; Mini screws in palate ; Orthodontic mini-implants ; Skeletal palatal expander ; Slow expansion
Published in:	Head & face medicine, Vol. 20 Núm. 1 (december 2024) , p. 70, ISSN 1746-160X

DOI: 10.1186/s13005-024-00474-6
PMID: 39617918

14 p, 2.8 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Institut de Recerca Sant Pau
Articles > Research articles
Articles > Published articles