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Physiochemical and mechanical characterisation of orthodontic 3D printed aligner material made of shape memory polymers (4D aligner material).
Atta, Islam; Bourauel, Christoph; Alkabani, Yasmine; Mohamed, Nesreen; Kimbe, Hoon; Alhotan, Abdulaziz; Ghoneima, Ahmed; Elshazly, Tarek.
Afiliación
  • Atta I; Oral Technology, Dental School, University Hospital Bonn, Bonn, Germany.
  • Bourauel C; Oral Technology, Dental School, University Hospital Bonn, Bonn, Germany.
  • Alkabani Y; Restorative and Dental Materials Department, National Research Centre, Giza, Egypt.
  • Mohamed N; Faculty of Dentistry, Charite University, Berlin, Germany.
  • Kimbe H; Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea.
  • Alhotan A; Department of Dental Health, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
  • Ghoneima A; Department of Orthodontics and Pediatric Dentistry, Hamdan Bin Mohammed College of Dental Medicine (HBMCDM), Mohammed Bin Rashid University of Medicine and Health Sciences (MBRU), Dubai, United Arab Emirates.
  • Elshazly T; Oral Technology, Dental School, University Hospital Bonn, Bonn, Germany; Department of Orthodontics and Pediatric Dentistry, Hamdan Bin Mohammed College of Dental Medicine (HBMCDM), Mohammed Bin Rashid University of Medicine and Health Sciences (MBRU), Dubai, United Arab Emirates. Electronic address
J Mech Behav Biomed Mater ; 150: 106337, 2024 02.
Article en En | MEDLINE | ID: mdl-38154364
ABSTRACT

OBJECTIVES:

To conduct a physiochemical and mechanical material analysis on 3D printed shape-memory aligners in comparison to thermoformed aligners. MATERIALS AND

METHODS:

Four materials were examined, including three thermoformed materials CA Pro (CP), Zendura A (ZA), Zendura FLX (ZF), and one 3D printed

material:

Tera Harz (TC-85). Rectangular strips measuring 50 × 10 × 0.5 mm were produced from each material. Five tests were conducted, including differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), shape recovery tests, three-points bending (3 PB), and Vickers surface microhardness (VH).

RESULTS:

DSC recorded glass transition temperatures (Tg) at 79.9 °C for CP, 92.2 °C for ZA, 107.1 °C for ZF, and 42.3 °C for TC-85. In DMA analysis at 20-45 °C, a prominent decrease in storage modulus was observed, exclusively for TC-85, as the temperature increased. Notably, within the temperature range of 30-45 °C, TC-85 exhibited substantial shape recovery after 10 min, reaching up to 86.1 %, while thermoformed materials showed minimal recovery (1.5-2.9 %). In 3 PB test (at 30, 37, 45 °C), ZA demonstrated the highest force at 2 mm bending, while TC-85 exhibited the lowest. Regarding VH at room temperature, there was a significant decrease for both ZA and ZF after thermoforming. ZA had the highest hardness, followed by ZF and TC-85, with CP showing the lowest values.

CONCLUSIONS:

TC-85 demonstrates exceptional shape memory at oral temperature, improving adaptation, reducing force decay, and enabling, together with its higher flexibility, extensive tooth movement per step. Additionally, it maintains microhardness similar to thermoformed sheets, ensuring the durability and effectiveness of dental aligners. CLINICAL RELEVANCE The 3D printed aligner material with shape memory characteristics (4D aligner) has revolutionized the orthodontic aligner field. It showed mechanical properties more suitable for orthodontic treatment than thermoforming materials. Additionally, it offers enhanced control over aligner design and thickness, while optimizing the overall workflow. It also minimizes material wastage, and reduces production expenses.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Materiales Inteligentes Idioma: En Revista: J Mech Behav Biomed Mater Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Materiales Inteligentes Idioma: En Revista: J Mech Behav Biomed Mater Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Países Bajos