Alumina versus Zirconia Comparative Survey of Thermic Influence During Dental Ceramic Core Manufacturing Process

Gatin, Eduard; Luculescu, C.; Bı̂rjega, R.; Ciobanu, Laura; Pătrașcu, Ion

doi:10.1080/02726351.2012.675016

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…The next method of investigation for ex vivo evaluation of bone samples was EDS (Energy Dispersive X-ray spectroscopy) and followed by SEM (Scanning Electron Microscopy). The equipment employed to our study was a SEM microscope FEI Inspect S, equipped with a secondary electron detector in low vacuum and a solid state BSE detector, plus an auxiliary micro analytic EDS—Si(Li) radiation detector (EDAX Sapphire UTW, 130 eV resolution) [ 19 , 20 ].…”

Section: Methodsmentioning

confidence: 99%

Preliminary Assessment of In Vivo Raman Spectroscopy Technique for Bone Quality Evaluation of Augmented Maxillary Sinus Floor

Gatin

Nagy

Iordache

et al. 2023

IJERPH

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(1) Background: In oral surgery, bone regeneration is achieved through various types of bone grafts or bone substitutes and its success is usually analyzed by micro-computed tomography and histomorphometry. The aim of this study was to evaluate the usefulness of Raman spectroscopy as an alternative to other techniques for bone quality evaluation during a standard oral surgery procedure. (2) Methods: The preliminary evaluation of bone augmentation during maxillary sinus floor elevation oral surgery was performed by Raman spectroscopy for several (five) patients during and after the surgery and the results were compared with postoperative data from histomorphometry, EDX and SEM analysis. (3) Results: After analyzing all the results for the bone samples according to the four methods (Raman, EDX, SEM and Histology) that were used in our study, the obtained result of the investigation provided a good augmentation process for three of the patients and partly successful augmentation process for two of the patients. The primary evaluation using Raman spectroscopy (in vivo and ex vivo investigation) was confirmed by histological results, thus having a first step for validation of Raman as a new method of imaging for dentistry. (4) Conclusions: Our results show that Raman spectroscopy could provide fast and reliable insight on bone condition during augmentation of the maxillary sinus floor. We emphasize the advantages and drawbacks of the proposed techniques as its accuracy could increase by performing larger size clinical trials. Using the Raman mapping, the method can serve as an alternative to histology.

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Section: Methodsmentioning

confidence: 99%

Preliminary Assessment of In Vivo Raman Spectroscopy Technique for Bone Quality Evaluation of Augmented Maxillary Sinus Floor

Gatin

Nagy

Iordache

et al. 2023

IJERPH

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“…The Raman probe was fixed almost in a perpendicular position on the jawbone surface (interest site) chosen for examination (Figure 1a in [ 10 ]). For each patient, three Raman spectra were recorded during the in vivo evaluation [ 3 , 5 , 16 , 17 ].…”

Section: Methodsmentioning

confidence: 99%

Periodontal Disease Monitoring by Raman Spectroscopy of Phosphates: New Insights into Pyrophosphate Activity

Gatin,

Iordache,

Gatin

et al. 2023

Diagnostics

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(1) Background: The intent of this survey was to investigate the quality of the alveolar bone by revealing the different phases for calcified tissues independent of the medical history of the patient in relation to periodontal disease by means of Raman spectroscopy and then to correlate the results by suggesting a possible mechanism for the medical impairment; (2) Methods: The investigation was mainly based on Raman spectroscopy that was performed in vivo during surgery for the selected group of patients. The targeted peaks for the Raman spectra were according to the reference compounds (e.g., calcium phosphates, other phosphates); (3) Results: The variation in the intensity of the spectrum correlated to the specific bone constituents’ concentrations highlights the bone quality, while some compounds (such as pyrophosphate, PPi) are strongly related to the patient’s medical status, and they provide information regarding a physiological process that occurred in the calcified tissues. Moreover, bone sample fluorescence is related to the collagen (Col) content, enabling a complete evaluation of bone quality, revealing the importance of collagen matrix acting as a load-bearing element for Calcium phosphate (CaP) deposition during the complex bone mineralization process; (4) Conclusions: We highlight that Raman spectroscopy can be considered a viable investigative method for in vivo and rapid bone quality valuation through oral health monitoring.

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“…SEM micrographs of dental ceramic samples, before and after corrosion process (insets): (a) alumina ceramic, (b) zirconia ceramic. Details: for insets, shady areas are corresponding to the cooroded areas [79,80,81 ] Examining the sample surfaces quality, we noticed that alumina ceramic sample is more corroded than zirconia sample. It can be observed small holes (gaps) on samples surface, larger for alumina than zirconia sapmple (Fig.…”

Section: Evaluation Of Corrosion For Dental Ceramicsmentioning

confidence: 99%

“…SEM micrographs of a dental restoration work with zirconia core after five years working time. Details: (a) interface zirconia core / dental luting cement, not corroded; (b) interface area affected by crack and crevice corrosion (shady areas) and surface deposits (black border shady areas); (c) surface deffects of zirconia dental ceramic core (shady areas) [79,80] Corrosion of Biomaterials Used in Dental Reconstruction Dentistry http://dx.doi.org/10.5772/57322…”

Section: Evaluation Of Corrosion For Dental Ceramicsmentioning

confidence: 99%

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Corrosion of Biomaterials Used in Dental Reconstruction Dentistry

Pătrașcu¹,

Vasilescu²,

Gatin³

et al. 2014

Developments in Corrosion Protection

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although biologically inert, it has poor mechanical properties, on the other hand, steels, which have excellent mechanical properties do not show a good corrosion resistance). Titanium is a material reactive in water, air, or any other electrolyte where it covers spontaneously with a titanium oxide layer. It is considered an inert material, as in contact with the tissue, it is rapidly inactivated forming on its surface a thin, hard, and protective layer of oxide, in less than one second [9, 10, 11, 47]. The titanium oxide film formed spontaneously is continuously regenerating and it provides an in-depth protection for the metal towards chemical attack, including the aggressive attack produced by the liquids of the body. Titanium is still considered the ideal material in endosseous dental implant. It does not produce any magnetic effect, it does not produce any magnetic field to disturb the activity around the cells; oxides from the surface of the implant being very adherent and insoluble, and they prevent the release and direct contact between the potentially harmful metal ions and tissues (biological compatibility). Titanium does not produce organic-metallic compounds, which are toxic, or if they are produced, such organic-metallic are unstable. Surface of oxides, consisting of TiO, TiO 3 , Ti 2 O 3 , and Ti 3 O 4 attracts and binds biomolecules (Kasemo 1983). The major disadvantage of this metal is the difficulty to cast it. Today it is obtained by dissociation in vacuum at 1400°C having a purity of 99.85 to 99.95%. Titanium alloys are better tolerated than pure titanium because the oxide layer that forms is higher (of approx. 10-20 μm) [9, 10]. Recent researches have demonstrated that the oxide layer (TiO) considered so stable regenerates every nanosecond, and re-oxidation is a major advantage due to minimizing the risk of biodegradation. It has been proven that next to resistance to corrosion, biological compatibility, resistance and price, the alloys used in medicine are "conversion" alloys based on titanium. Resistance to corrosion can be increased by alloying with molybdenum, zirconium, rhenium, niobium, chromium, manganese. Biomedical titanium alloys are: Ti-Al-V, Ti-Al-Mo, Ti-Al-Cr, Ti-Al-Cr-Co. Frequent use of titanium alloy Ti-6Al-4V for implants is determined by a combination of the most numerous and more favourable characteristics, which include resistance to corrosion, durability, low elasticity module and the ability to adhere with bone and other tissues (osseointegration) [13, 14, 18, 20, 36]. However, there are a number of issues related to the effects the components of the alloy can have. Aluminium and vanadium are elements released into the tissue. Therefore, a number of titanium alloys have investigated (Ti-Al-Nb, Ti-Zr-Al) and it was demonstrated that the Ti-6Al-6Nb alloy has properties comparable to the Ti-6Al-4V alloy, but it shows a greater strength and resistance to corrosion [53, 55]. Analysis of possible reactions to prolonged contact of living tissues with the alignment elements of tit...

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Alumina versus Zirconia Comparative Survey of Thermic Influence During Dental Ceramic Core Manufacturing Process

Cited by 5 publications

References 15 publications

Preliminary Assessment of In Vivo Raman Spectroscopy Technique for Bone Quality Evaluation of Augmented Maxillary Sinus Floor

Preliminary Assessment of In Vivo Raman Spectroscopy Technique for Bone Quality Evaluation of Augmented Maxillary Sinus Floor

Periodontal Disease Monitoring by Raman Spectroscopy of Phosphates: New Insights into Pyrophosphate Activity

Corrosion of Biomaterials Used in Dental Reconstruction Dentistry

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