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MARPE expander activation load with different configurations of extender arms heights: in-vitro evaluation.
Faria, Staell Ribeiro de; Andrade, Túlio Rodrigues de; André, Cristiane Barros; Montalli, Victor Angelo Martins; Barbosa, Jurandir Antonio; Basting, Roberta Tarkany.
Afiliación
  • Faria SR; Faculdade São Leopoldo Mandic, Dentistry Department (Campinas/SP, Brazil).
  • Andrade TR; Faculdade São Leopoldo Mandic, Dentistry Department (Campinas/SP, Brazil).
  • André CB; Mogi das Cruzes University, Dentistry Department (Mogi das Cruzes/SP, Brazil).
  • Montalli VAM; Faculdade São Leopoldo Mandic, Dentistry Department (Campinas/SP, Brazil).
  • Barbosa JA; Faculdade São Leopoldo Mandic, Dentistry Department (Campinas/SP, Brazil).
  • Basting RT; Faculdade São Leopoldo Mandic, Dentistry Department (Campinas/SP, Brazil).
Dental Press J Orthod ; 29(4): e242458, 2024.
Article en En | MEDLINE | ID: mdl-39230114
ABSTRACT

OBJECTIVE:

Evaluate the load mini-implants exert on the artificial bone when expanding the MARPE EX in three different extension arm configurations.

METHODS:

A device simulating the human palate was fabricated and attached to a universal testing machine, for conducting tests with different MARPE expanders (n=5) non-adjustable/control (MARPE SL, Peclab) or with low, intermediate, and high extender arms (MARPE EX, Peclab). The expanders were manually activated until failure of the device occurred, and maximum load values were recorded. Load averages were also calculated for every five activations until the twentieth activation.

RESULTS:

The generalized linear mixed model for repeated measures over time showed that there was significant increase in load with activations for all expanders (p=0.0004). Up to the twentieth activation, the expander with low extender arms presented higher load than the others, while the expander with high extender arms showed lower load values (p<0.05). There was no significant difference among expanders regarding the number of activations (p=0.0586), although there was a trend towards fewer activations until fracture for the control expander. It was observed that the higher the configuration, the lower the force the mini-implants delivered to the bone. The control expander provided a force magnitude similar to that of the adjustable expander when positioned at the intermediate height.

CONCLUSIONS:

The activation load of MARPE expanders is influenced by the type of presentation of the extensor arms, with higher configurations resulting in lower force delivered by the mini-implants to the bone.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Técnica de Expansión Palatina / Diseño de Aparato Ortodóncico / Análisis del Estrés Dental Límite: Humans Idioma: En Revista: Dental Press J Orthod Año: 2024 Tipo del documento: Article Pais de publicación: Brasil
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Técnica de Expansión Palatina / Diseño de Aparato Ortodóncico / Análisis del Estrés Dental Límite: Humans Idioma: En Revista: Dental Press J Orthod Año: 2024 Tipo del documento: Article Pais de publicación: Brasil