Emese Ábrám - Academia.edu (original) (raw)
Papers by Emese Ábrám
Journal of Dentistry, Jun 1, 2022
Fogorvosi szemle, Mar 20, 2023
Journal of Esthetic and Restorative Dentistry, Jun 19, 2023
ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer‐infiltrated... more ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer‐infiltrated ceramic‐network materials (PICN) with different translucencies and thicknesses on multiple types of substrates.Materials and MethodsCeramic samples were prepared of VITA ENAMIC blocks in two different translucencies (2M2‐T, 2M2‐HT) in a thickness range of 0.5–2.5 mm (±0.05 mm). Layered specimens were obtained using composite substrates in nine shades and transparent try‐in paste. Spectral reflectance of specimens was measured using a Konica Minolta CM‐3720d spectrophotometer and D65 standard illumination. CIEDE2000 color difference (ΔE00) between two samples was evaluated using 50%:50% perceptibility and acceptability thresholds. Specular component of the reflection was examined with Specular Component Excluded (SCE) and Included (SCI) settings. Statistical evaluation was performed by linear regression analysis, Kruskal–Wallis test, and multiplicative effect analysis.ResultsAn increase in thickness of 0.5 mm reduces ΔE00 of HT samples to 73.5%, of T samples to 60.5% (p < 0.0001). Five substrates with HT specimens, and three substrates with T specimens had significantly different results from average (p < 0.05). There is a significant difference between SCE and SCI data depending on the wavelength (p < 0.0001).ConclusionsMasking ability of PICN materials is influenced by the thickness and translucency of the ceramic, and by the substrate. Reflection of the examined PICN material is characterized by both diffuse and specular reflection.Clinical SignificanceAlthough PICN materials have been available on the market for 10 years now, there is a lack of information regarding their masking ability. Acquiring in‐depth data and thereby practical experience of the factors affecting the esthetics of PICN materials is essential for creating perfectly lifelike restorations.
Fogorvosi szemle, Jun 19, 2023
Complex prosthetic treatment of a patient with chromium and nickel allergy Introduction: Nowadays... more Complex prosthetic treatment of a patient with chromium and nickel allergy Introduction: Nowadays, the number of patients suffering from allergic diseases is constantly increasing. Intraoral symptoms and complaints can be caused by dental materials, such as metals (most often nickel and palladium metal alloys) and polymers. In case of metal allergy, the use of traditional dental alloys containing the given material is contraindicated, but full-ceramic systems or titanium frameworks can be suitable alternatives. Case report: 46-year-old female patient showed up at Semmelweis University Department of Prosthodontics in 2019 with the purpose of replacing her missing teeth. The patient's allergy to eugenol, chromium and nickel was confirmed by an epicutaneous test. Following the current professional recommendations regarding the use of alternative materials, porcelain fused to zirconia crowns and composite fused to titanium fixed partial dentures were planned on the upper jaw. On the lower jaw, a complex denture was planned with a fixed part of a composite fused to titanium splint, and a removable part with dentomucosal support, precision attachments and titanium baseplate. The prosthetic phase was preceded by professional oral hygiene and conservative dental treatments. Summary: Due to high frequency of allergies, dentists should be aware that patients may be hypersensitive to certain dental materials in the everyday dental care. Although the treatment of these patients requires prudence, long-term success can be achieved by using alternative substances in appropriate indications.
Special Care in Dentistry, Jan 18, 2023
Advances in Applied Ceramics, 2020
ABSTRACT The goal of this study is to examine specific optical effects of multilayered and colour... more ABSTRACT The goal of this study is to examine specific optical effects of multilayered and coloured monolithic zirconia considering thickness and substrates of different colours using one of the most advanced spectrophotometers of the world. Multilayered zirconia specimens were used for the study with the thickness range of 0.5–2.5 mm and six types of substrate materials and three types of metal substrates. Measurements were carried out at Budapest Technical University with a PerkinElmer®Lambda1050UV/Vis/NIR spectrophotometer. The substrate colour and the thickness of zirconia affects the optical results, with special regard to colour perceptibility and acceptability. Monochromatic and multilayer zirconia show both similarities and discrepancies in behaviour, i.e. spectral reflectance and ΔE. Owing to the multi-coloured characteristics of multilayered zirconia the optical effect of the substrate less predictable than in the case of monochromatic zirconia thus requiring more detailed planning and implementation.
Journal of Esthetic and Restorative Dentistry, 2019
Objective: The aim of this in vitro study was to evaluate the effects of substrate colors, differ... more Objective: The aim of this in vitro study was to evaluate the effects of substrate colors, different levels of ceramic thickness and translucency, and cement shades on the color difference from a reference color of lithium-disilicate crowns. Materials and Methods: A premolar tooth preparation was made on a study model for 1.0 and 1.5 mm thick full-ceramic crowns. Digital impressions were taken (3Shape TRIOS) and crowns designed in a CAD program (DentalDesigner). Shade A1 crowns were milled (Everest, Kavo) from hightranslucency (HT) and low-translucency IPS e.max (Ivoclar Vivadent) blocks. Twelve substrates were made of different colors and materials (Natural Die Material, Co-Cr, zirconia, and gold-colored alloy). Three different shades of try-in pastes were used to simulate the effect of cements (Variolink Esthetic try-in paste; Ivoclar). Shade measurement was done three times for each crown by a spectrophotometer (VITA Easyshade Advance); averages were compared to a reference crown (A1, HT, 1.5 mm, ND2 abutment, neutral try-in paste) with ΔE 00 (CIEDE2000, according to the CIE latest standard) calculated. Results: All the examined parameters influenced the ΔE 00 of the crowns. The weakest effect was exerted by the try-in paste. Conclusions: All examined parameters influenced the final color of e.max CAD lithium-disilicate ceramic crowns. Clinical Significance Matching the shade of ceramic crowns to the natural tooth color is a great challenge in dentistry. To meet patients' increasing esthetical expectations, CAD/CAM methods are very popular for fullceramic crowns. However, several factors such as the shade of the abutment, luting cement color, ceramic thickness, and translucency may influence the final color. Our objective was to measure the optical effect of these factors on the final shade of CAD/CAM lithium-disilicate ceramic crowns.
Advances in Applied Ceramics, 2018
ABSTRACT Objective: The aim of this in vitro study is to examine the optical effects of monolithi... more ABSTRACT Objective: The aim of this in vitro study is to examine the optical effects of monolithic zirconia of different translucency and thickness, combined with substrates of different colours. Materials and methods: Zirconia specimens of two colours (A2P1, WHITE) were used for the study, three try-in pastes (Variolink Esthetic); substrates were prepared from nine types of materials (six VITA SIMULATE, three metals). Measurements were carried out at the Faculty of Atomic Physics of the Technical University of Budapest with the state-of-the-art PerkinElmer® Lambda 1050 spectrophotometer. Results: The colouring of zirconia has a major effect on dE values resulting in different colour perceptibility and acceptability. Try-in pastes, however, have no significant effects overall. Conclusion: Applying coloured zirconia is highly eligible for preparing aesthetic crowns as their substrate-covering effect makes it possible to reproduce the desired colour. Uncoloured zirconia nonetheless is unaffected by the substrate material, especially above a certain layer thickness.
Fogorvosi szemle, 2005
The medical and dental history is one of the crucial part of the routine dental practice. Accordi... more The medical and dental history is one of the crucial part of the routine dental practice. According to a survey performed in 2001 27% of the total Hungarian population was above the age of 60. The prognosis forecasts an increasing tendency in life expectancy and an even higher percentage of elderly population in the foreseeable future. Due to the increasing life expectancy the risk for complications of common dental treatments is also increasing. More care and attention should be paid to anticipate the occurrence of sudden complications during dental treatment that might also be a life threatening condition. In 1941 the American Dental Association drew up a questionnaire based on the risk groups established by the American Society of Anaesthesiologists (ASA). In 1993 K.J.M. de Jong et al. presented the results of their experience with the clinical application of these questionnaires. Based on their studies the Dental Working Group of the Health Committee of the European Council reco...
Journal of Dentistry, Jun 1, 2022
Fogorvosi szemle, Mar 20, 2023
Journal of Esthetic and Restorative Dentistry, Jun 19, 2023
ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer‐infiltrated... more ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer‐infiltrated ceramic‐network materials (PICN) with different translucencies and thicknesses on multiple types of substrates.Materials and MethodsCeramic samples were prepared of VITA ENAMIC blocks in two different translucencies (2M2‐T, 2M2‐HT) in a thickness range of 0.5–2.5 mm (±0.05 mm). Layered specimens were obtained using composite substrates in nine shades and transparent try‐in paste. Spectral reflectance of specimens was measured using a Konica Minolta CM‐3720d spectrophotometer and D65 standard illumination. CIEDE2000 color difference (ΔE00) between two samples was evaluated using 50%:50% perceptibility and acceptability thresholds. Specular component of the reflection was examined with Specular Component Excluded (SCE) and Included (SCI) settings. Statistical evaluation was performed by linear regression analysis, Kruskal–Wallis test, and multiplicative effect analysis.ResultsAn increase in thickness of 0.5 mm reduces ΔE00 of HT samples to 73.5%, of T samples to 60.5% (p < 0.0001). Five substrates with HT specimens, and three substrates with T specimens had significantly different results from average (p < 0.05). There is a significant difference between SCE and SCI data depending on the wavelength (p < 0.0001).ConclusionsMasking ability of PICN materials is influenced by the thickness and translucency of the ceramic, and by the substrate. Reflection of the examined PICN material is characterized by both diffuse and specular reflection.Clinical SignificanceAlthough PICN materials have been available on the market for 10 years now, there is a lack of information regarding their masking ability. Acquiring in‐depth data and thereby practical experience of the factors affecting the esthetics of PICN materials is essential for creating perfectly lifelike restorations.
Fogorvosi szemle, Jun 19, 2023
Complex prosthetic treatment of a patient with chromium and nickel allergy Introduction: Nowadays... more Complex prosthetic treatment of a patient with chromium and nickel allergy Introduction: Nowadays, the number of patients suffering from allergic diseases is constantly increasing. Intraoral symptoms and complaints can be caused by dental materials, such as metals (most often nickel and palladium metal alloys) and polymers. In case of metal allergy, the use of traditional dental alloys containing the given material is contraindicated, but full-ceramic systems or titanium frameworks can be suitable alternatives. Case report: 46-year-old female patient showed up at Semmelweis University Department of Prosthodontics in 2019 with the purpose of replacing her missing teeth. The patient's allergy to eugenol, chromium and nickel was confirmed by an epicutaneous test. Following the current professional recommendations regarding the use of alternative materials, porcelain fused to zirconia crowns and composite fused to titanium fixed partial dentures were planned on the upper jaw. On the lower jaw, a complex denture was planned with a fixed part of a composite fused to titanium splint, and a removable part with dentomucosal support, precision attachments and titanium baseplate. The prosthetic phase was preceded by professional oral hygiene and conservative dental treatments. Summary: Due to high frequency of allergies, dentists should be aware that patients may be hypersensitive to certain dental materials in the everyday dental care. Although the treatment of these patients requires prudence, long-term success can be achieved by using alternative substances in appropriate indications.
Special Care in Dentistry, Jan 18, 2023
Advances in Applied Ceramics, 2020
ABSTRACT The goal of this study is to examine specific optical effects of multilayered and colour... more ABSTRACT The goal of this study is to examine specific optical effects of multilayered and coloured monolithic zirconia considering thickness and substrates of different colours using one of the most advanced spectrophotometers of the world. Multilayered zirconia specimens were used for the study with the thickness range of 0.5–2.5 mm and six types of substrate materials and three types of metal substrates. Measurements were carried out at Budapest Technical University with a PerkinElmer®Lambda1050UV/Vis/NIR spectrophotometer. The substrate colour and the thickness of zirconia affects the optical results, with special regard to colour perceptibility and acceptability. Monochromatic and multilayer zirconia show both similarities and discrepancies in behaviour, i.e. spectral reflectance and ΔE. Owing to the multi-coloured characteristics of multilayered zirconia the optical effect of the substrate less predictable than in the case of monochromatic zirconia thus requiring more detailed planning and implementation.
Journal of Esthetic and Restorative Dentistry, 2019
Objective: The aim of this in vitro study was to evaluate the effects of substrate colors, differ... more Objective: The aim of this in vitro study was to evaluate the effects of substrate colors, different levels of ceramic thickness and translucency, and cement shades on the color difference from a reference color of lithium-disilicate crowns. Materials and Methods: A premolar tooth preparation was made on a study model for 1.0 and 1.5 mm thick full-ceramic crowns. Digital impressions were taken (3Shape TRIOS) and crowns designed in a CAD program (DentalDesigner). Shade A1 crowns were milled (Everest, Kavo) from hightranslucency (HT) and low-translucency IPS e.max (Ivoclar Vivadent) blocks. Twelve substrates were made of different colors and materials (Natural Die Material, Co-Cr, zirconia, and gold-colored alloy). Three different shades of try-in pastes were used to simulate the effect of cements (Variolink Esthetic try-in paste; Ivoclar). Shade measurement was done three times for each crown by a spectrophotometer (VITA Easyshade Advance); averages were compared to a reference crown (A1, HT, 1.5 mm, ND2 abutment, neutral try-in paste) with ΔE 00 (CIEDE2000, according to the CIE latest standard) calculated. Results: All the examined parameters influenced the ΔE 00 of the crowns. The weakest effect was exerted by the try-in paste. Conclusions: All examined parameters influenced the final color of e.max CAD lithium-disilicate ceramic crowns. Clinical Significance Matching the shade of ceramic crowns to the natural tooth color is a great challenge in dentistry. To meet patients' increasing esthetical expectations, CAD/CAM methods are very popular for fullceramic crowns. However, several factors such as the shade of the abutment, luting cement color, ceramic thickness, and translucency may influence the final color. Our objective was to measure the optical effect of these factors on the final shade of CAD/CAM lithium-disilicate ceramic crowns.
Advances in Applied Ceramics, 2018
ABSTRACT Objective: The aim of this in vitro study is to examine the optical effects of monolithi... more ABSTRACT Objective: The aim of this in vitro study is to examine the optical effects of monolithic zirconia of different translucency and thickness, combined with substrates of different colours. Materials and methods: Zirconia specimens of two colours (A2P1, WHITE) were used for the study, three try-in pastes (Variolink Esthetic); substrates were prepared from nine types of materials (six VITA SIMULATE, three metals). Measurements were carried out at the Faculty of Atomic Physics of the Technical University of Budapest with the state-of-the-art PerkinElmer® Lambda 1050 spectrophotometer. Results: The colouring of zirconia has a major effect on dE values resulting in different colour perceptibility and acceptability. Try-in pastes, however, have no significant effects overall. Conclusion: Applying coloured zirconia is highly eligible for preparing aesthetic crowns as their substrate-covering effect makes it possible to reproduce the desired colour. Uncoloured zirconia nonetheless is unaffected by the substrate material, especially above a certain layer thickness.
Fogorvosi szemle, 2005
The medical and dental history is one of the crucial part of the routine dental practice. Accordi... more The medical and dental history is one of the crucial part of the routine dental practice. According to a survey performed in 2001 27% of the total Hungarian population was above the age of 60. The prognosis forecasts an increasing tendency in life expectancy and an even higher percentage of elderly population in the foreseeable future. Due to the increasing life expectancy the risk for complications of common dental treatments is also increasing. More care and attention should be paid to anticipate the occurrence of sudden complications during dental treatment that might also be a life threatening condition. In 1941 the American Dental Association drew up a questionnaire based on the risk groups established by the American Society of Anaesthesiologists (ASA). In 1993 K.J.M. de Jong et al. presented the results of their experience with the clinical application of these questionnaires. Based on their studies the Dental Working Group of the Health Committee of the European Council reco...