Comparative evaluation of the amount of the residual monomer in conventional and deep-frozen heat cure polymethylmethacrylate acrylic resin: An in vitro study

Jadhav, Sonali S; Mahajan, Neerja; Sethuraman, Rajesh

doi:10.4103/jips.jips_206_17

Cited by 13 publications

(3 citation statements)

References 15 publications

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“…Therefore, this procedure should not have any influence on the measured data. The samples in the present study were smoothed using fine cross‐cut burs and not polished to a high gloss, although polishing diminishes substance release from dental materials [58, 59]. Due to the relief of the teeth, the largest surface of a dental splint is the inner part, which is never polished in daily clinical practice.…”

Section: Discussionmentioning

confidence: 99%

Bisphenol A release from CAD/CAM splint materials

Hampe,

Liersch,

Wiechens

et al. 2024

European J Oral Sciences

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This study aimed to investigate the bisphenol A (BPA) release from four CAD/CAM splint materials: three polycarbonate‐based (DD BioSplint C, Splint Plus Biostar, Temp Premium Flexible) and one polymethylmethacrylate‐based (Temp Basic) material. From each material, ten cylindrical samples (n = 40) were immersed in high‐performance liquid chromatography (HPLC) grade water following ISO 10993‐12 and incubated for 24 h in an incubation shaker at 37°C and 112 rpm. Following BPA derivatization, analysis was performed by high‐performance liquid chromatography–tandem mass spectrometry (HPLC‐MS/MS). After 24 h of incubation, all investigated materials released significant amounts of BPA compared to water blanks. The material‐dependent elution increased in the following order: DD BioSplint C < Splint Plus Biostar < Temp Basic < Temp Premium Flexible. Subtracting extraneous BPA, the concentrations ranged between 2.27 ng/mL and 12.65 ng/mL. After extrapolating the concentrations in relation to the average surface area of occlusal splints, the amount of BPA per mL exceeded the Tolerable Daily Intake (TDI) set by the European Union for a person weighing 70 kg by 1.32–6.16 times. Contrary to the release from previously investigated materials, BPA elution from CAD/CAM splint materials was highly elevated. Considering the increasing adaptation of CAD/CAM techniques, elution from them may represent a relevant BPA source in daily dental practice.

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Section: Discussionmentioning

confidence: 99%

Bisphenol A release from CAD/CAM splint materials

Hampe,

Liersch,

Wiechens

et al. 2024

European J Oral Sciences

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“…The splints are created by combining pre-polymerized PMMA powder with a liquid component containing MMA monomers and a cross-linking agent such as ethylene glycol dimethacrylate. These splints serve as guides during the surgery to ensure the surgical plan is executed accurately [ 10 , 11 ].…”

Section: Applications Of Denture Base Materialsmentioning

confidence: 99%

Polymeric Denture Base Materials: A Review

Alqutaibi,

Baik,

Almuzaini

et al. 2023

Polymers

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An ideal denture base must have good physical and mechanical properties, biocompatibility, and esthetic properties. Various polymeric materials have been used to construct denture bases. Polymethyl methacrylate (PMMA) is the most used biomaterial for dentures fabrication due to its favorable properties, which include ease of processing and pigmenting, sufficient mechanical properties, economy, and low toxicity. This article aimed to comprehensively review the current knowledge about denture base materials (DBMs) types, properties, modifications, applications, and construction methods. We searched for articles about denture base materials in PubMed, Scopus, and Embase. Journals covering topics including dental materials, prosthodontics, and restorative dentistry were also combed through. Denture base material variations, types, qualities, applications, and fabrication research published in English were considered. Although PMMA has several benefits and gained popularity as a denture base material, it has certain limitations and cannot be classified as an ideal biomaterial for fabricating dental prostheses. Accordingly, several studies have been performed to enhance the physical and mechanical properties of PMMA by chemical modifications and mechanical reinforcement using fibers, nanofillers, and hybrid materials. This review aimed to update the current knowledge about DBMs’ types, properties, applications, and recent developments. There is a need for specific research to improve their biological properties due to patient and dental staff adverse reactions to possibly harmful substances produced during their manufacturing and use.

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“…У багатьох дослідженнях повідомляється, що залишковий мономер діє як пластифікатор, який впливає на фізичні властивості акрилової смоли (наприклад, знижує ударну в'язкість та викликає зміну кольору). Присутність залишкового мономеру в базисах зубних протезів несприятливо впливає як на механічні властивості, так і на біосумісність цих полімерів, оскільки вимивання мономеру викликає токсичні та алергічні реакції з такими симптомами, як відчуття печіння, почервоніння, набряк та виразка слизової оболонки порожнини рота [3,4].…”

Section: вступunclassified

Мethods of Post-Polymerization Processing of Bases in Removable Dentures in Order to Reduce the Quantity of Residual Monomer

Zagradska,

Antoshchuk

2023

Act. Probl. of the Modern Med.

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The purpose of this study was to assess the effect of post-polymerization treatment on the quantity of methyl methacrylate released into water from polymethyl methacrylate base samples of materials subjected to different procedures. Materials and methods. For each technique, 10 samples in the form of a square with a side of 50 mm and a thickness of 5.0 mm were made for the base materials VBPLP, ABPHT, BPHT in accordance with the manufacturers' instructions. Five different procedures for reducing the amount of residual monomer of polished base plastics samples were studied, namely: controlled vacuuming in water at 60-80°C for 10 minutes (A), immersion in an ethanol solution at a temperature of 55°C for 10 minutes (B), ultrasonic treatment at 40 kHz for 5 minutes in distilled water (C), immersion in distilled water for 24 hours (D), boiling in water for 3 hours (E), control samples without post-polymerization treatment (F). Following the implementation of procedures for minimizing residual monomer levels in the studied samples, they were placed in individual containers containing 10 ml of distilled water for 12 hours at a temperature of 37°C. The quantification of water-eluted MMA was conducted through liquid chromatography. Results. Of the 180 measurements performed, 42 showed values below the limit of detection (MW: 2.0 ppm), 58 below the lower limit of quantification (LMQ: 6.0 ppm), and 80 had average values between 6.4 and 13.2 ppm MMA. The NLQ is the lowest concentration of the analyte that differs from the blank, usually with a confidence level of 99%, while the MV is the lowest concentration of the analyte that can be reliably determined with repeatability and precision. The lower limit of quantification is 6.00 ppm, the detection limit is 2.00 ppm. Conclusions. The risk of residual monomer as a primary stimulus for a sensitizing reaction can be minimized by using these regimens. The results of measuring the amount of elution of the MMA monomer in water for two of the three materials tested were below the detection limit in both of these modes.

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Comparative evaluation of the amount of the residual monomer in conventional and deep-frozen heat cure polymethylmethacrylate acrylic resin: An in vitro study

Abstract: The amount of the residual monomer was found to be least in deep-frozen polished PMMA specimen stored in water for 24 h at +37°C (Group 4). Thus, it can be concluded that deep freezing, polishing, and storing in water can reduce the residual monomer content.

Cited by 13 publications

References 15 publications

Bisphenol A release from CAD/CAM splint materials

Bisphenol A release from CAD/CAM splint materials

Polymeric Denture Base Materials: A Review

Мethods of Post-Polymerization Processing of Bases in Removable Dentures in Order to Reduce the Quantity of Residual Monomer

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