The Dynamic Viscoelasticity of Dental Soft Polymer Material Containing Citrate Ester-Based Plasticizers

Hong, Guang; Wang, Weiqi; Sun, Lu Wei; Han, Jian; Sasaki, Keiichi

doi:10.3390/ma13225078

Cited by 8 publications

(9 citation statements)

References 30 publications

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“…However, this problem can be solved by the addition of some additive's compounds such as citrate ester-based plasticizer. The citrate esterbased plasticizer has significant properties in improving the durability of dental soft polymer materials [16]. On the other hand, the acrylic soft liners were preferred as it makes the dentures less painful compared to the silicone based soft liners.…”

Section: Classifications Of Soft Tissue Linersmentioning

confidence: 99%

“…They proposed that the biomechanical theory of the conventional complete dentures is in need for a serious change of dynamic mechanical resistance between the denture base and the oral mucosa [28]. In another recent in vitro study, Hong et al, [16] suggested that the addition of citrate esterbased plasticizer can improve the viscoelastic properties and expand the sturdiness of soft liners. In addition, oral mucosa has demonstrated referent biopolymer viscoelastic mechanical property in vitro which is comparable to soft liners [16,29].…”

Section: Physical and Chemical Characteristics Of Soft Linersmentioning

confidence: 99%

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Potential Therapeutic and Effective Properties of Soft Tissue Liners

2023

JPTCP

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Soft tissue liners are polymer materials between the oral tissue and the surface of the denture. They have an essential role in reducing the effect of the masticatory force on the oral mucosa. This short review gleaned data on soft tissue liners to highlight their potential therapeutic importance in the management of denture-related stomatitis and their comparison to other materials. Published articles in many databases were collected using keywords with soft liner properties, viscoelastic, dental materials, impression technique, and additive liner materials. The soft liners were compared to the viscoelastic oral mucosa, and their influences on the control of denture plaque were highlighted too. Their application in the treatment of denture-related stomatitis, as well as adhesion and biofilm formation, was highlighted. The result showed that soft tissue liners have high therapeutic efficacy and effective properties in treating denture stomatitis due to the incorporation of chlorhexidine, antifungal, and antimicrobial agents. The use of soft liners improved ridge resorption and had a crucial effect on the loss of denture fit and stability. In addition, soft tissue liners in combination with additive materials recovered the effect of saliva on the formation and adhesion of biofilm. Uniquely, the application of soft liners in the functional impression technique was ideal, due to their extensive physical properties, their viscoelasticity, and the immediate poured impression. Therefore, soft liners are highly recommended in many dental conditions such as dentures opposing natural dentition, resorption of irregular bone, immediate implant placement, tooth undercuts, oral mucosa atrophy, bruxism, and xerostomia.

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Section: Classifications Of Soft Tissue Linersmentioning

confidence: 99%

Section: Physical and Chemical Characteristics Of Soft Linersmentioning

confidence: 99%

Potential Therapeutic and Effective Properties of Soft Tissue Liners

2023

JPTCP

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“…Plasticizers provide softness or resilience to this type of material at body temperature. Plasticizers are soluble in oral fluids, and their gradual loss over time leads to hardening of the material in the patient’s mouth [ 17 ]. Given the proven toxicity of phthalates, the most commonly used plasticizers in dental acrylates, their replacement with citrates would significantly improve the biological value of dental acrylates.…”

Section: Composition Of Dental Acrylate Polymersmentioning

confidence: 99%

The Use of Acrylate Polymers in Dentistry

et al. 2022

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The manuscript aimed to review the types of acrylate polymers used in dentistry, as well as their chemical, physical, mechanical, and biological properties. Regarding their consistency and purpose, dental acrylate polymers are divided into hard (brittle), which includes acrylates for the production of plate denture bases, obturator prostheses, epitheses and maxillofacial prostheses, their repairs and lining, and soft (flexible), which are used for lining denture bases in special indications. Concerning the composition and method of polymerization initiation, polymers for the production of denture bases are divided into four types: heat-, cold-, light-, and microwave-polymerized. CAD/CAM acrylate dentures are made from factory blocks of dental acrylates and show optimal mechanical and physical properties, undoubtedly better monomer polymerization and thus biocompatibility, and stability of the shape and colour of the base and dentures. Regardless of the number of advantages that these polymers have to offer, they also exhibit certain disadvantages. Technological development enables the enhancement of all acrylate properties to respond better to the demands of the profession. Special attention should be paid to improving the biological characteristics of acrylate polymers, due to reported adverse reactions of patients and dental staff to potentially toxic substances released during their preparation and use.

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“…Moreover, TMA is also very commonly used to study the thermal expansion of polymer [16,17], inorganic non-metallic [18], and composite materials [19,20]. The DMA method has also been used to study the thermal expansion coefficient, but it is more complex than the TMA method due to its frequency effect [21]. In measuring viscoelasticity and related storage modulus loss modulus, the DMA method is highly effective [22].…”

Section: Introductionmentioning

confidence: 99%

A Quasi-Nondestructive Evaluation Method for Physical-Mechanical Properties of Fragile Archaeological Wood with TMA: A Case Study of an 800-Year-Old Shipwreck

Han

Qin

et al. 2022

Forests

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Archaeological wood is a kind of ‘new material’ that has deteriorated due to long-term degradation. The existing wood science theory and evaluation methods are not fully applicable to archaeological wood. Moreover, current physical-mechanical evaluation methods are inadequate for fragile archaeological wood due to their insufficient accuracy and the large sample amount required, causing difficulties in many necessary physical-mechanical repeatability tests. In light of these limitations, the representative samples on Nanhai No. 1, a merchant shipwreck in the Song Dynasty, were selected as the research objects in this paper. The shipwreck is a typical waterlogged wooden artifact. A quasi-nondestructive physical-mechanical evaluation technique for archaeological wood was developed with the thermomechanical analyzer (TMA). This study used TMA to evaluate the bending strength of representative waterlogged archaeological samples of Nanhai No. 1 shipwreck and sound wood with the same species. Besides, the thermal linear expansion coefficients in the ambient temperature range were obtained. The sizes of the samples used in the tests were only 2 mm × 8 mm × 0.3 mm and 1 cm × 1 cm × 1 cm, respectively. Bending strength results of archaeological wood by the TMA method conformed to the tendency that the bending strength decreases with the increase of decay degree. In addition, the longitudinal linear expansion coefficients of archaeological wood reached 80%–115% of those in the transverse grain direction, which were about 10 times higher than those of the sound wood. The linear expansion coefficients of archaeological wood in three directions were similar. Based on the results of Fourier transform infrared analysis (FT-IR), the significant differences in the physical-mechanical properties of the archaeological wood and the sound wood were induced to be mainly ascribed to the decomposition and the loss of hemicellulose in the archaeological wood. The cell wall substrate could not stabilize the cellulose skeleton, which led to the instability of the tracheid structure of the archaeological wood. This study provided a proven quasi-nondestructive method for the preservation state evaluation of waterlogged archaeological wood (WAW) from the Nanhai I shipwreck and other similar waterlogged wooden relics.

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The Dynamic Viscoelasticity of Dental Soft Polymer Material Containing Citrate Ester-Based Plasticizers

Cited by 8 publications

References 30 publications

Potential Therapeutic and Effective Properties of Soft Tissue Liners

Potential Therapeutic and Effective Properties of Soft Tissue Liners

The Use of Acrylate Polymers in Dentistry

A Quasi-Nondestructive Evaluation Method for Physical-Mechanical Properties of Fragile Archaeological Wood with TMA: A Case Study of an 800-Year-Old Shipwreck

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