References of "MAINJOT, Amélie"
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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 (The) (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 detailBiocompatibility of polymer-infiltrated-ceramicnetwork (PICN) materials with Human Gingival Keratinocytes (HGKs)
GRENADE, Charlotte ULiege; 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 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 (2017)

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 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 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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See detailLa zircone en prothèse dentaire et implantaire
MAINJOT, Amélie ULiege

Conference (2016, November 28)

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See detailLes nouveaux céramiques hybrides usinables : vont-ils révolutionner notre pratique ?
MAINJOT, Amélie ULiege

Conference (2016, November 26)

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See detailCeramic Biomaterials
Mainjot, Amélie ULiege

Scientific conference (2016, November 10)

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See detailCéramiques et Composites: nouveaux matériaux et nouvelles stratégies thérapeutiques
MAINJOT, Amélie ULiege

Conference (2016, October 07)

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See detailComportement clinique des couronnes monolithiques en zircone
KOENIG, Vinciane ULiege; Wulfman, Claudine; MAINJOT, Amélie ULiege

in Les entretiens d'Odontologie-Stomatologie 2016 (2016, October)

Les études cliniques sur les couronnes et les bridges en zircone Y-TZP ont indiqué des taux d'échecs élevés liés aux fractures cohésives de la céramique d’émaillage (chipping). Pour remédier à ce problème ... [more ▼]

Les études cliniques sur les couronnes et les bridges en zircone Y-TZP ont indiqué des taux d'échecs élevés liés aux fractures cohésives de la céramique d’émaillage (chipping). Pour remédier à ce problème, les fabricants commercialisent des couronnes monolithiques, entièrement en zircone, qui sont simplement maquillées en surface. Cependant, ces restaurations sont suspectées d’être plus sensibles à la fatigue hydrique de la zircone, problème qui aboutit à une baisse des propriétés mécaniques et qui fut à l’origine de nombreux échecs avec les prothèses de hanche. En effet, l’absence de céramique d’émaillage sur les couronnes monolithiques les rend plus vulnérables vis à vis du milieu oral ; de plus, certaines zircones de haute translucidité, spécifiquement développées pour cette indication, sont réputées plus sensibles en raison d’une plus grande métastabilité. Enfin, le recul clinique sur ces restaurations est très faible et leur comportement général, notamment en terme d’usure des dents antagonistes, a besoin d’être étudié. Une étude clinique est actuellement menée à l’Université de Liège, en collaboration avec l’Université Paris Descartes, afin d’évaluer le comportement clinique de la zircone non émaillée en milieu buccal, et particulièrement la fatigue hydrique, sur une période de 5 ans. Les résultats à très court terme (6 mois) mettent en évidence le bon comportement clinique des restaurations monolithiques en zircone, avec cependant une usure rapide de la glaçure, ce qui pourrait promouvoir la fatigue hydrique. Les zones de transformation cristalline détectées soulignent la nécessité d’une cuisson de régénération de la zircone suite aux ajustements occlusaux par fraisage. [less ▲]

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See detailEvolutions des techniques et matériaux en prothèses depuis 40 ans; Perspectives
MAINJOT, Amélie ULiege

Conference (2016, September 09)

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See detailBiocompatibility of polymer-infiltrated-ceramic-network (PICN) materials with Human Gingival Fibroblasts (HGFs).
GRENADE, Charlotte ULiege; De Pauw-Gillet, Marie-Claire ULiege; Gailly, Patrick ULiege et al

in Dental materials : official publication of the Academy of Dental Materials (2016), 32(9), 1152-1164

OBJECTIVES: Polymer-infiltrated-ceramic-network (PICN) materials constitute an innovative class of CAD-CAM materials offering promising perspectives in prosthodontics, but no data are available in the ... [more ▼]

OBJECTIVES: Polymer-infiltrated-ceramic-network (PICN) materials constitute an innovative class of CAD-CAM materials offering promising perspectives in prosthodontics, but no data are available in the literature regarding their biological properties. The objective of the present study was to evaluate the in vitro biocompatibility of PICNs with human gingival fibroblasts (HGFs) in comparison with materials typically used for implant prostheses and abutments. METHODS: HGF attachment, proliferation and spreading on discs made of PICN, grade V titanium (Ti), yttrium zirconia (Zi), lithium disilicate glass-ceramic (eM) and polytetrafluoroethylene (negative control), were evaluated using a specific insert-based culture system (IBS-R). Sample surface properties were characterized by XPS, contact angle measurement, profilometry and SEM. RESULTS: Ti and Zi gave the best results regarding HGF viability, morphology, number and coverage increase with time in comparison with the negative control, while PICN and eM gave intermediate results, cell spreading being comparable for PICN, Ti, Zi and eM. Despite the presence of polymers and their related hydrophobicity, PICN exhibited comparable results to glass-ceramic materials, which could be explained by the mode of polymerization of the monomers. SIGNIFICANCE: The results of the present study confirm that the currently employed materials, i.e. Ti and Zi, can be considered to be the gold standard of materials in terms of HGF behavior, while PICN gave intermediate results comparable to eM. The impact of the present in vitro results needs to be further investigated clinically, particularly in the view of the utilization of PICNs for prostheses on bone-level implants. [less ▲]

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See detailUtilisation des matériaux céramiques en dentisterie esthétique
MAINJOT, Amélie ULiege

Conference (2016, June 16)

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See detailDental ceramics: classification and indications
Mainjot, Amélie ULiege

in Esthetics in Dentistry (2016)

Detailed reference viewed: 167 (11 ULiège)