Publications of Amélie Mainjot
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See detailThe One step-No prep technique: A straightforward and minimally invasive approach for full-mouth rehabilitation of worn dentition using polymer-infiltrated ceramic network (PICN) CAD-CAM prostheses
Mainjot, Amélie ULiege

in Journal of Esthetic and Restorative Dentistry (2018)

Objectives: To introduce a novel approach for full-mouth rehabilitation of severely worn dentition using polymer-infiltrated ceramic network (PICN) computer-aided-design and manufacturing (CAD-CAM ... [more ▼]

Objectives: To introduce a novel approach for full-mouth rehabilitation of severely worn dentition using polymer-infiltrated ceramic network (PICN) computer-aided-design and manufacturing (CAD-CAM) restorations, without tooth tissue preparation and provisional phase. Clinical considerations: Three patients with generalized tooth wear, suffering from dental pain, masticatory dysfunction, bruxism and neck and back pain, were selected and treated in collaboration with physiotherapists. Occlusal analyses were performed and full-mouth diagnostic waxups were designed on the basis of estimated tissue loss. Deficient direct restorations were replaced and low-thickness PICN (Vita Enamic) restorations (up to 0.2 mm) were CAD-CAM designed from wax-ups, milled, tried-in and then bonded within two consecutive days. To mask palatal veneers, either buccal direct composites or glass-ceramic veneers were later performed. An occlusal splint was realized. Clinical results were shown to be successful after a follow-up of 22, 18, and 13 months, respectively. The absence of provisional phase did not engender any inconveniences. Patient reported outcomes were very positive, showing a reduction in neck and back pain and a well-being increase. Conclusion: The proposed protocol is particularly minimally invasive and straightforward compared to classical techniques. PICNs exhibit several advantages compared to other materials. Preliminary results of this multidisciplinary approach are promising but deserve further clinical research. [less ▲]

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See detailPartie-1 à la rencontre de céramiques pas comme les autres
Mainjot, Amélie ULiege

in Biomatériaux Matériaux Cliniques (2018), 3

Dernière née des céramiques dentaires destinées à faire du tout céramique et super championne de la résistance mécanique, la zircone, ou plutôt devrait-on dire les zircones, sont apparues sur le marché de ... [more ▼]

Dernière née des céramiques dentaires destinées à faire du tout céramique et super championne de la résistance mécanique, la zircone, ou plutôt devrait-on dire les zircones, sont apparues sur le marché de la prothèse dentaire au début des années 2000, dix ans après l’alumine et vingt ans après les premières vitro-céramiques renforcées (système Empress, Ivoclar Vivadent) et les céramiques infiltrées (système In-Ceram, Vita). Des prothèses émaillées aux restaurations monolithiques en zircone haute translucidité, que penser des différents matériaux commercialisés depuis déjà plus de quinze ans ? Que penser de cette céramique que les fabricants ont baptisé « le métal blanc » – car la zircone pourrait, selon eux, satisfaire la majorité des indications, de l’inlay au bridge de 14 éléments – ? Qu’en dit la littérature ? Quels sont les avantages, mais aussi les limites, des matériaux zircone ? Telles sont les questions qui seront abordées au travers de deux articles consacrés à des céramiques pas comme les autres… [less ▲]

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See detailPolymer-Infiltrated-Ceramic-Network, Computer-Aided Design/Computer-Assisted Manufacturing Restorations for Oral Rehabilitation of Pediatric Patients with X-Linked Ectodermal Dysplasia
Foucher, France ULiege; Mainjot, Amélie ULiege

in International Journal of Prosthodontics (2018)

Functional and esthetic oral rehabilitation of young patients affected by ectodermal dysplasia is traditionally performed with direct composite restorations, which encounter various limitations. However ... [more ▼]

Functional and esthetic oral rehabilitation of young patients affected by ectodermal dysplasia is traditionally performed with direct composite restorations, which encounter various limitations. However, recent advances in computer-aided design/computer-assisted manufacturing (CAD/CAM) composites have led to the introduction of high-performance materials. In the present case report, a 9-year-old patient was treated with 20 CAD/CAM partial and peripheral restorations in polymer-infiltrated-ceramic-network material to restore deciduous and permanent teeth. The restorations were minimally invasive, since they did not require any tooth tissue preparation. Appropriate occlusal relationships with increased vertical dimension of occlusion were obtained. Tooth anatomy and esthetics were significantly improved, and chairtime was reduced. [less ▲]

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See detailWear measurement of dental tissues and materials in clinical studies: A systematic review
Wulfman, Claudine; KOENIG, Vinciane ULiege; Mainjot, Amélie ULiege

in Dental Materials (2018)

tObjectives. This study aims to systematically review the different methods used for wearmeasurement of dental tissues and materials in clinical studies, their relevance and relia-bility in terms of ... [more ▼]

tObjectives. This study aims to systematically review the different methods used for wearmeasurement of dental tissues and materials in clinical studies, their relevance and relia-bility in terms of accuracy and precision, and the performance of the different steps of theworkflow taken independently.Methods. An exhaustive search of clinical studies related to wear of dental tissues andmaterials reporting a quantitative measurement method was conducted. MedLine, Embase,Scopus, Cochrane Library and Web of Science databases were used. Prospective studies,pilot studies and case series (>10 patients), as long as they contained a description of wearmeasurement methodology. Only studies published after 1995 were considered.Results. After duplicates’ removal, 495 studies were identified, and 41 remained for quantita-tive analysis. Thirty-four described wear-measurement protocols, using digital profilometryand superimposition, whereas 7 used alternative protocols. A specific form was designed toanalyze the risk of bias. The methods were described in terms of material analyzed; studydesign; device used for surface acquisition; matching software details and settings; typeof analysis (vertical height-loss measurement vs volume loss measurement); type of areainvestigated (entire occlusal area or selective areas); and results.Sinificance. There is a need of standardization of clinical wear measurement. Current meth-ods exhibit accuracy, which is not sufficient to monitor wear of restorative materials andtooth tissues. Their performance could be improved, notably limiting the use of replicas,using standardized calibration procedures and positive controls, optimizing the settings ofscanners and matching softwares, and taking into account unusable data. [less ▲]

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See detailA Functionally Graded PICN Material for Biomimetic CAD-CAM Blocks
Eldafrawy, Maher ULiege; Nguyen, Jean-François; Mainjot, Amélie ULiege et al

in Journal of Dental Research (2018)

The objective of this study was to introduce a functionally graded (FG) polymer-infiltrated ceramic network (PICN) block, characterized by a gradient of mechanical properties, as a biomimetic material for ... [more ▼]

The objective of this study was to introduce a functionally graded (FG) polymer-infiltrated ceramic network (PICN) block, characterized by a gradient of mechanical properties, as a biomimetic material for computer-aided design and manufacturing (CAD-CAM) prostheses. FG-PICN blocks were manufactured from a slurry of glass-ceramic powder, which was subsequently centrifuged and sintered. The ceramic network was infiltrated with urethane dimethacrylate and polymerized under high temperature-pressure. Blocks were sectioned into 9 layers, and each layer was subsequently cut into 3 samples. Samples were loaded into a 3-point bending device and tested for flexural strength, flexural load energy, and flexural modulus. The volume percentage of glass-ceramic, hardness, and brittleness index were also measured and scanning electron microscopy (SEM) observations were performed. Katana translucent zirconia (HT-ZIR) and e.max-CAD (EMX) were tested for comparison. Flexural strength, flexural load energy, and Weibull modulus of FG-PICN were shown to increase from the first (enamel-like zone) to the ninth layer (dentin-like zone), while, on the contrary, flexural modulus, hardness, brittleness index, and ceramic volume percentage decreased. SEM characterization highlighted a higher porosity in layer 9 than in layer 1. Flexural strength of the dentin-like zone (372.7 ± 27.8 MPa) was similar to EMX and lower than HT-ZIR. Flexural modulus was shown to vary from 41.9 ± 5.1 to 28.6 ± 2.0 GPa from surface to depth. Flexural load energy in the dentin-like zone (27.1 ± 4.9 mJ) was significantly superior to EMX and HT-ZIR. Hardness gradient was shown to be close to tooth tissues. This work introduces FG-PICN blocks, with a gradient of mechanical and optical properties through the entire thickness of the block designed to mimic dental tissues. FG-PICN demonstrated a favorable gradient of flexural strength, elastic modulus, and, most of all, flexural load energy and hardness compared to other CAD-CAM materials, which can promote the biomechanical behavior of single-unit restorations on teeth and implants. [less ▲]

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See detailOne-Step No-Prep Treatment of Worn Dentition using PICNs
Oudkerk, Julie ULiege; Eldafrawy, Maher ULiege; BEKAERT, Sandrine ULiege et al

in Journal of Dental Research (2018)

The objective of this study was to evaluate a one-step treatment approach of worn dentition (One-step No-prep), using a Polymer Infiltrated Ceramic Network (PICN) CAD-CAM composite material, (Vita Enamic ... [more ▼]

The objective of this study was to evaluate a one-step treatment approach of worn dentition (One-step No-prep), using a Polymer Infiltrated Ceramic Network (PICN) CAD-CAM composite material, (Vita Enamic,Vita Zahnfabrik, Germany). [less ▲]

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See detailBonding to CAD-CAM Composites: An Interfacial Fracture Toughness Approach
Eldafrawy, Maher ULiege; Ebroin, Marie ULiege; Gailly, Patrick ULiege et al

in Journal of Dental Research (2018)

The objective of this study was to evaluate the interfacial fracture toughness (IFT) of composite cement with dispersed filler (DF) versus polymer-infiltrated ceramic network (PICN) computer-aided design ... [more ▼]

The objective of this study was to evaluate the interfacial fracture toughness (IFT) of composite cement with dispersed filler (DF) versus polymer-infiltrated ceramic network (PICN) computer-aided design and computer-aided manufacturing (CAD-CAM) composite blocks after 2 different surface pretreatments using the notchless triangular prism (NTP) test. Two DFs (Cerasmart [CRT] and Lava Ultimate [LVA]), 2 PICNs (Enamic [ENA] and experimental PICN [EXP]), and e.max CAD lithium disilicate glass-ceramic (EMX, control) prism samples were bonded to their counterparts with Variolink Esthetic DC composite cement after either hydrofluoric acid etching (HF) or gritblasting (GR). Both procedures were followed by silanization. All samples (n = 30 per group) were thermocycled (10,000 cycles) and tested for their IFT in a water bath at 36°C. Moreover, representative samples from each group were subjected to a developed interfacial area ratio (Sdr) measurement by profilometry and scanning electron microscopy (SEM) characterization. EXP-HF gave the highest IFT (1.85 ± 0.39 MPa·m1/2), followed by EMX-HF and ENA-HF, while CRT-HF gave the lowest (0.15 ± 0.22 MPa·m1/2). PICNs gave significantly better results with HF, and DF showed better results with GR. A 2-way analysis of variance indicated that there were significantly higher IFT and Sdr for PICNs than for DF. A positive correlation (r2 = 0.872) was found between IFT and Sdr. SEM characterization showed the specific microstructure of the surface of etched PICNs, indicating the presence of a retentive polymerbased honeycomb structure. Etching of the typical double-network microstructure of PICNs causes an important increase in the Sdr and IFT, while DF should be gritblasted. DF exhibited significantly lower Sdr and IFT values than PICNs. The present results show the important influence of the material class and surface texture, and consequently the micromechanical bond, on the adhesive interface performance of CAD-CAM composites [less ▲]

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See detailSilane Influence on PICN Interfacial Fracture Toughness with Resin Cement
Eldafrawy, Maher ULiege; Greimers, Laura; BEKAERT, Sandrine ULiege et al

in Journal of Dental Research (2018)

To evaluate the influence of silane on Interfacial Fracture Toughness (IFT) of composite cement with two sub-classes of CAD-CAM composites, polymer-infiltrated ceramic network (PICN) and dispersed filler ... [more ▼]

To evaluate the influence of silane on Interfacial Fracture Toughness (IFT) of composite cement with two sub-classes of CAD-CAM composites, polymer-infiltrated ceramic network (PICN) and dispersed filler (DF), after etching or gritblasting. Secondary objectives were to correlate results with developed interfacial area ratio (Sdr) and surface wettability. [less ▲]

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See detailIn Vivo Low Thermal Degradation of Monolithic Zirconia Restorations
KOENIG, Vinciane ULiege; Wulfman, Claudine; DUPONT, Nathalie ULiege et al

in Journal of Dental Research (2018)

To evaluate In vivo low thermal degradation (LTD) of zirconia monolithic implant and tooth restorations, particularly in-mouth zirconia crystalline microstructure changes, as well as influence of occlusal ... [more ▼]

To evaluate In vivo low thermal degradation (LTD) of zirconia monolithic implant and tooth restorations, particularly in-mouth zirconia crystalline microstructure changes, as well as influence of occlusal stress and glaze protection on this process. Secondary objectives included the investigation of restorations’ general clinical behaviour and material wear. [less ▲]

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See detailOne-Tooth One-Time (1T1T): a straightforward approach to replace missing teeth in the posterior region
Lambert, France ULiege; Mainjot, Amélie ULiege

in Journal of Oral Implantology (2017)

Advances in Computer-Aided Design and Manufacturing (CAD-CAM) composite materials and chair-side CAD-CAM systems offer a new landscape for the implant dentistry. Digital workflows are increasingly used ... [more ▼]

Advances in Computer-Aided Design and Manufacturing (CAD-CAM) composite materials and chair-side CAD-CAM systems offer a new landscape for the implant dentistry. Digital workflows are increasingly used, especially for single-unit restorations, and they allow straightforward and cost-effective protocols that improve patient satisfaction. The efficacy of immediate loading on single implants has been demonstrated (1, 2). Currently, to 12 promote osseointegration, the use of resin-based provisional crowns out of occlusion is recommended for immediate loading. Such protocols require several appointments and a significant contribution of the dentist and the lab technician, which affects overall treatment cost. On the other hand, CAD-CAM composites, especially Polymer-Infiltrated Ceramic Network (PICN), are now competing with ceramics for definitive single-unit restorations, notably due to their better machinability (faster and in lower-thickness milling, with les edge chipping) (3) (4), the absence of post-milling firing and the ease of in-mouth adjustments. In particular, their higher resilience and lower elasticity modulus could indicate them for immediate loading of implants. Intraoral scanning (IOS) of single-unit implants right after surgery and the chair-side manufacturing of a PICN crown would allow delivery of a resilient final tooth on the same day. The aim of these two case reports is to describe, as a technical note, an innovative approach for a straightforward and cost-effective replacement of a single missing tooth in the posterior region, as a proof of concept. [less ▲]

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See detailOne-step and no-prep treatment of worn dentition using PICNs. A prospective clinical study
OUDKERK, Julie ULiege; Eldafrawy, Maher ULiege; BEKAERT, Sandrine ULiege et al

in European Cells and Materials (2017, June)

Computer-Aided Design and Manufacturing (CAD-CAM) composite materials offer new possibilities in terms of minimally invasive treatment strategies of worn dentition. Among those materials, Polymer ... [more ▼]

Computer-Aided Design and Manufacturing (CAD-CAM) composite materials offer new possibilities in terms of minimally invasive treatment strategies of worn dentition. Among those materials, Polymer Infiltrated Ceramic Network (PICN) materials, (Vita Enamic, Vita Zahnfabrik, Bad Sackingen, Germany) exhibit mechanical properties significantly superior to conventional composites1. Their ability to be milled in very low thickness allows to perform very thin bonded restorations without further elimination of tooth tissues (no-prep). Yet, the treatment is complex particularly with respect to the provisional restoration realization, which is intended to test and determine the new vertical dimension of occlusion (VDO). On the other hand, some authors have previously reported that VDO determination remains empirical and that it can be increased in one time up to 5mm (in the front zone) without engendering any adverse effects. Therefore, the objective of the present study is to evaluate a new treatment approach of worn dentition using PICNs, entitled “One step-No prep” [less ▲]

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See detailThe Influence of Silane on the Interfacial Fracture Toughness of PICNs with Resin Cement
Eldafrawy, Maher ULiege; Greimers, Laura; Nguyen, Jean-François et al

in European Cells and Materials (2017, June)

CAD-CAM composites can be divided into 2 sub-classes according to their microstructure, Polymer Infiltrated Ceramic Networks (PICN) and Dispersed Filler (DF) materials1. Pre-treatment procedures including ... [more ▼]

CAD-CAM composites can be divided into 2 sub-classes according to their microstructure, Polymer Infiltrated Ceramic Networks (PICN) and Dispersed Filler (DF) materials1. Pre-treatment procedures including creation of micro-roughness using hydrofluoric acid (HF) for micro-mechanical retention and silanization for chemical bonding are commonly reported to be necessary to bond PICNs to the resin cement. On the other hand, PICNs were shown to exhibit a retentive polymer-based honeycomb structure when etched, which promotes the micro-mechanical bond but could reduce the need of silane since the inorganic part of the material surface is removed by the etching procedure. The objective of this study was to evaluate the influence of silane on Interfacial Fracture Toughness (IFT) at mouth temperature of composite cement with PICN versus DF materials, after HF etching and upon thermocycling aging. The hypothesis was that silane pre-treatment has no effect on the IFT of composite cement with PICNs. [less ▲]

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See detailLow Thermal Degradation of monolithic zirconia dental prostheses: 1-yr results of a prospective clinical study with ex vivo analyses
KOENIG, Vinciane ULiege; Wulfman, Claudine; DUPONT, Nathalie ULiege et al

in European Cells and Materials (2017, June)

Recent introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) monolithic zirconia dental prostheses raises the issue of material low thermal degradation (LTD), a well-known problem ... [more ▼]

Recent introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) monolithic zirconia dental prostheses raises the issue of material low thermal degradation (LTD), a well-known problem with zirconia hip prostheses. This phenomenon could be accentuated by masticatory mechanical stress. Until now zirconia LTD process has only been studied in vitro. The main objective of this study was to evaluate the in vivo LTD of zirconia restorations on implants and natural teeth using an original protocol including ex vivo analyses of zirconia crystalline microstructure, focusing on the effect of occlusal stress and protection by a glaze layer. Secondary objectives included the investigation of the general behaviour of monolithic restorations and the study of material wear process. [less ▲]

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See detailPICN Versus Dispersed Filler Materials Interfacial KIC With Resin Cement
Eldafrawy, Maher ULiege; Ebroin, Marie ULiege; Gailly, Patrick ULiege et al

in Journal of Dental Research (2017, March)

The objective of this study was to evaluate adhesive interfacial fracture toughness (a-IFT) of resin cement with materials representative of the two classes of CAD-CAM composites, Dispersed filler (DF ... [more ▼]

The objective of this study was to evaluate adhesive interfacial fracture toughness (a-IFT) of resin cement with materials representative of the two classes of CAD-CAM composites, Dispersed filler (DF) and Polymer Infiltrated Ceramic Network (PICN), after different surface treatments. The null hypotheses were that the material class and surface texture after treatment do not influence a-IFT. [less ▲]

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See detailBiocompatibility of polymer-infiltrated-ceramicnetwork (PICN) materials with Human Gingival Keratinocytes (HGKs)
GRENADE, Charlotte ULiege; De Pauw-Gillet, Marie-Claire ULiege; PIRARD, Catherine ULiege et al

in Dental Materials (2017), 33

Objective. Biocompatibility of polymer-infiltrated-ceramic-network (PICN) materials, a new class of CAD–CAM composites, is poorly explored in the literature, in particular, no data are available regarding ... [more ▼]

Objective. Biocompatibility of polymer-infiltrated-ceramic-network (PICN) materials, a new class of CAD–CAM composites, is poorly explored in the literature, in particular, no data are available regarding Human Gingival Keratinocytes (HGK). The first objective of this study was to evaluate the in vitro biocompatibility of PICNs with HGKs in comparison with other materials typically used for implant prostheses. The second objective was to correlate results with PICN monomer release and indirect cytotoxicity. Methods. HGK attachment, proliferation and spreading on PICN, grade V titanium (Ti), yttrium zirconia (Zi), lithium disilicate glass-ceramic (eM) and polytetrafluoroethylene (negative control) discs were evaluated using a specific insert-based culture system. For PICN and eM samples, monomer release in the culture medium was quantified by high performance liquid chromatography and indirect cytotoxicity tests were performed. Results. Ti and Zi exhibited the best results regarding HGK viability, number and coverage. eM showed inferior results while PICN showed statistically similar results to eM but also to Ti regarding cell number and to Ti and Zi regarding cell viability. No monomer release from PICN discs was found, nor indirect cytotoxicity, as for eM. Significance. The results confirmed the excellent behavior of Ti and Zi with gingival cells. Even if polymer based, PICN materials exhibited intermediate results between Ti–Zi and eM. These promising results could notably be explained by PICN high temperature–high pressure (HT–HP) innovative polymerization mode, as confirmed by the absence of monomer release and indirect cytotoxicity [less ▲]

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See detailNo post-no core approach to restore severely damaged posterior teeth: An up to 10-year retrospective study of documented endocrown cases
BELLEFLAMME, Marcia ULiege; Geerts, Sabine ULiege; LOUWETTE, Marie ULiege et al

in Journal of Dentistry (2017)

Objectives The objectives of the present study were to (1) retrospectively evaluate documented cases of ceramic and composite endocrowns performed using immediate dentin sealing (IDS); (2) correlate ... [more ▼]

Objectives The objectives of the present study were to (1) retrospectively evaluate documented cases of ceramic and composite endocrowns performed using immediate dentin sealing (IDS); (2) correlate failures with clinical parameters such as tooth preparation characteristics and occlusal parameters. Methods 99 documented cases of endocrowns were evaluated after a mean observation period of 44.7 ± 34.6 months. A classification of restorations was established in function of the level of damage of residual tooth tissues after preparation, from 1 to 3. Evaluation was performed according to FDI criteria and endodontic outcomes were analyzed. Occlusal risk factors were examined and fractographic analysis was performed in case of fracture. Results 48.4% of patients were shown to present occlusal risk factors. 75.8% of restorations were Class 3 endocrowns. 56.6% were performed on molars, 41.4% on premolars and 2.0% on canines. 84.8% were performed in lithium-disilicate glass-ceramic and 12.1% in Polymer-Infiltrated Ceramic Network (PICN) material. The survival and success rates of endocrowns were 99.0% and 89.9% respectively, while the 10-year Kaplan-Meier estimated survival and success rates were 98.8% and 54.9% respectively. Ten failures were detected: periodontal disease (n = 3), endocrown debonding (n = 2), minor chipping (n = 2), caries recurrence (n = 2) and major fractures (n = 1). Due to the reduced amount of failures, no statistical correlation could be established with clinical parameters. Conclusions Endocrowns were shown to constitute a reliable approach to restore severely damaged molars and premolars, even in the presence of extensive coronal tissue loss or occlusal risk factors, such as bruxism or unfavorable occlusal relationships. Clinical significance Practitioners should consider the endocrown instead of the post and core approach to restore severely damaged non-vital posterior teeth. This minimally invasive solution reduces the risk of catastrophic failures and is easily performed. The use of IDS procedure and lithium-disilicate glass-ceramic as prosthesis material gave very good results. [less ▲]

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See detailIn vivo Low Thermal Degradation of monolithic zirconia restorations
Wulfman, Claudine; KOENIG, Vinciane ULiege; DUPONT, Nathalie ULiege et al

in Dental Materials (2017)

A 5-year clinical study was designed to evaluate the in vivo low thermal degradation (LTD) of zirconia monolithic restorations on implants and natural teeth. Additionally, general behavior of restorations ... [more ▼]

A 5-year clinical study was designed to evaluate the in vivo low thermal degradation (LTD) of zirconia monolithic restorations on implants and natural teeth. Additionally, general behavior of restorations and material wear were studied. This work focuses on ex vivo analysis of zirconia phase transformation and on the influence of glaze protection and occlusal mechanical stress on this process. [less ▲]

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See detailAging of monolithic zirconia dental prostheses: Protocol for a 5-year prospective clinical study using ex vivo analyses
KOENIG, Vinciane ULiege; Wulfman, Claudine; DERBANNE, Mathieu et al

in Contemporary Clinical Trials Communication (2016), 4

Background: Recent introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) monolithic zirconia dental prostheses raises the issue of material low thermal degradation (LTD), a ... [more ▼]

Background: Recent introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) monolithic zirconia dental prostheses raises the issue of material low thermal degradation (LTD), a wellknown problem with zirconia hip prostheses. This phenomenon could be accentuated by masticatory mechanical stress. Until now zirconia LTD process has only been studied in vitro. This work introduces an original protocol to evaluate LTD process of monolithic zirconia prostheses in the oral environment and to study their general clinical behavior, notably in terms of wear. Methods/design: 101 posterior monolithic zirconia tooth elements (molars and premolars) are included in a 5-year prospective clinical trial. On each element, several areas between 1 and 2 mm2 (6 on molars, 4 on premolars) are determined on restoration surface: areas submitted or non-submitted to mastication mechanical stress, glazed or non-glazed. Before prosthesis placement, ex vivo analyses regarding LTD and wear are performed using Raman spectroscopy, SEM imagery and 3D laser profilometry. After placement, restorations are clinically evaluated following criteria of the World Dental Federation (FDI), complemented by the analysis of fracture clinical risk factors. Two independent examiners perform the evaluations. Clinical evaluation and ex vivo analyses are carried out after 6 months and then each year for up to 5 years. Discussion: For clinicians and patients, the results of this trial will justify the use of monolithic zirconia restorations in dental practice. For researchers, the originality of a clinical study including ex vivo analyses of material aging will provide important data regarding zirconia properties. [less ▲]

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See detailLes matériaux céramiques
Mainjot, Amélie ULiege

Scientific conference (2016, December 13)

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