The integration of computer-aided design and manufacturing technologies in diagnosis, treatment planning, fabrication prosthetic restoration is changing the way which prosthodontic provided to patients. aim this study was compare accuracy three-dimensional (3D) printed casts produced from intraoral scanner using stereolithographic (SLA) 3D printing technique, their digital replicas, conventional stone casts. In vitro study, a typodont maxillary mandibular arches with full dentate ivory teeth...

The fracture resistance of ceramic inlay-retained fixed partial dentures (CIRFPDs) was studied.Thirty CIRFPDs were constructed using ice zircon milled material. Specimens divided into three groups, 10 specimens each, according to the abutment preparation: inlay-shaped (occluso-proximal inlay + proximal box), tub-shaped inlay), and box-shaped preparations. Each group then subdivided two subgroups five span edentulous area representing a missing premolar or molar. All subjected test.CIRFPDs...

<b>Objectives:</b> To evaluate the push-out bond strength of two surface treatments a glass fiber and zirconia ceramic post.<br> <b>Materials Methods:</b> Sixty samples were fabricated divided into main groups according to type esthetic post indicated for maxillary central incisor: post. Each group was subdivided subgroups test either between root or core. subgroup further three classes treatment: no treatment (control), sandblasting in conjunction with silica particles then silane coating...

Objectives: The effect of ceramics construction (press- able, machinable) and corrosion on flexural strength micro-hardness was studied. Materials & Methods: Two types were tested: IPS e-max Press CAD. Forty samples constructed divided into 2 groups according to the type ceramics. Each group then subdivided subgroups. Subgroups 1 not subjected while subgroups corro-sion test. Finally each subgroup classes test: biaxial strength, micro-hardness. Results: There a sig-nificant difference...

This study was designed to compare an alternative indirect treatment repair fractured or chipped veneering metal ceramic using recently developed ultra-low-fusing ceramics.One conventional feldspathic ceramic, Vita Omega, and three ceramics (ULFC), Finesse, Duceram LFC, Vision-low, were used. Forty specimens prepared divided into two groups. Group I (n = 20) for bond strength testing. It comprised four subgroups (A, B, C, D): one Ceramic-resin (A) Ceramic-ULFC disc of different diameters (B,...

BACKGROUND: The reason for the development of high strength zirconia is that offers enough about 1000 MPa and glass ceramic in range 360–400 MPa, to provide safely options many indications.&#x0D; AIM: This study aims evaluate fracture resistance zirconia-reinforced lithium silicate (ZLS) disilicate restorations.&#x0D; MATERIALS AND METHODS: In this vitro study, forty crowns were fabricated by CAD/CAM technology, all samples divided into two groups (n = 20) according material used: Group Z...

To study the effect of bleaching agents on surface topography ceramometal alloys.Three types alloys were used (gold, Ni-Cr, Co-Cr-Ti), and two (an agent intended for home use, one use in dental office) studied. Forty-five specimens constructed divided according to alloy type into three main groups, 15 per group. Each group was further subdivided subgroups used. The first subgroup (five specimens) not subjected any agent. second third in-office agents, respectively.Au showed least roughness...

Aim: The purpose of this study is to evaluate the effect surface treatments on color lithium disilicate ceramic (IPS e. max [CAD]) and hybrid (VITA Suprinity [pc]).Method: Ceramic blocks were sectioned in one hundred sixty discs; eighty discs randomly subdivided four groups according treatment (n= 20).Group C: Control group without treatment; I: using (AL 2 O 3 ) particles size 50µm; II: Hydro fluoric (HF) acid etching; III: tribochemical (TBC) treatment.Eighty 20) same groups.Color...

The Fixed Prosthodontics dept.- Minia University was established in September 1999, as the first and pioneer F.P. dept. all Upper Egypt. Four chairmen headed department: Prof. Fatouh Ramadan (2001-2002), Prof Omaima El Mahallawi (2002-2005), Cherif Mohsen (2005-2019, 2021-2023) associate professor Manal Rafie (2019-2021). postgraduate studies & researches started at 2003. During these twenty years 2003-2022, one hundred four theses were carried out according to several successive plans....

Objective: This study aimed to assess the effect of various surface treatments on push-out bond strength custom-made PolyEtherEtherketone(PEEK) and prefabricated glass fiber posts after being treated with different treatment materials. Materials methods: Sixty single rooted upper central incisors that were recently extracted selected. All root canals endodontically post spaces prepared then divided into two groups based type. Prefabricated (n=30) used in first group(G), while milled...

Purpose: This research aimed to compare lithium disilicate glass ceramic and high translucent monolithic zirconia using different finishing techniques after being exposed a corrosive medium.Materials Methods: Two main materials, Lithium Di-silicate (IPS e.max CAD LT A3, C14) High Translucent Zirconia (HTZ) from DD BioZx2 A3-HT, along with acetic acid as agent was employed in this study. Forty discs(10x12mm) were classified into two groups (20 discs each) according the type of used then each...

Objective: To assess the fracture load of lithium silicate occlusal veneers reinforced with zirconia at two thicknesses 0.3 and 0.6 mm, luted to either dentin or enamel, in vitro.Materials methods:Forty human maxillary premolars were randomly distributed into four groups (n = 10): Veneers that are E1-0.3 mm thick, E2-0.6 D1-0.3 D2-0.6 thick dentin, respectively. Following luting processes, specimens heated for 5000 thermal cycles (5ºC/55ºC, 1 min dwell period, 10-second interval) then...

AIM: The purpose of this study was to evaluate the surface roughness two types ceramic after different treatments using an atomic force microscope (AFM).&#x0D; MATERIALS AND METHODS: One hundred sixty disks were fabricated eighty lithium disilicate (LD) (IPS e. max computer-aided design [CAD]) and hybrid (VITA Suprinity pc). Disks subdivided into four groups according treatment (n = 20). Eighty CAD) LD I: control (no treatment), II: Sandblasting (Al2O3, 50 μm particle size), III:...

Statement of Problem: Many studies have investigated translucency ceramic veneers in association with different trial insertion paste materials.1,2,3. Little information is available on the ef- fect cement space thickness final shade color glass ceramic, feldspathic and zirconia reinforced veneers. Purpose: The aim study to evaluate three CAD/CAM ve- neer materials internal relief spaces shades. Material Method: Sixty samples were constructed classified according type into main groups ( I )...

Objective The goal of this study was to find out how aging and a surface treatment called solgel nano silica affect microleakage in zirconia ceramic crowns. Materials methods:Twenty recently extracted human maxillary first molars were prepared for full coverage crowns made Yttrium-stabilized ceramics that are readily available.They split into four groups, each with five samples the control group, thermocycling nanosilica nanosilica-thermocycling group.Zirconia crown fitting surfaces coated...

Objective: The purpose of this in vitro study will evaluate marginal gap endocrowns retained bridges replacing missing lower second molar done by two different designs from monolithic zirconia. Material and method: twenty designed zirconia. Specimens be divided into groups, each these groups contains 10 samples, the first group represents endocrown retained, bridges. for buccal, lingual, proximal connector area were measured .scan electron microscope used. Universal testing machine was used...

Purpose: To evaluate the fracture force of occlusal veneer restorations using ceramic material (Lithium di-silicate) and hybrid (VITA Enamic) Computer Aided Desingn/Computer Manufacturer (CAD/CAM) at different thicknesses after thermocycling. Material Method: Thirty CAD/CAM were fabricated from group E (IPS e.max CAD), V divided into subgroups according to thickness 0.3, 0.6, 1 mm. The veneers luted epoxy dies (n=5). specimens subjected thermocycling test then they load until a computer...

Aim of the study: This in vitro study was conducted to investigate fracture strength and microleakage simulated immature teeth reinforced with fiber post using two types composite resin cement " total etch self ". Materials methods:Eighty freshly extracted maxillary central incisors were used study, they divided into groups (40 samples for each) according stage root development (mature -immature), Then each group subdivided subgroups (20 type adhesive (RELY X TM U200 Automix) (3M ESPE...

Objectives: A comparison study between ceramic full coverage FPDs & 3 designs of inlay retained regarding vertical marginal gap retention. Materials Methods: Twenty samples were construc- ted and divided into 4 groups according to the type restorations: coverage, inlay-shaped (occluso-pro- ximal + proximal box), tub-shaped inlay), box-shaped FPDs. All subjected a measurements followed by retention test. Results: The data showed no significant difference FPDs, tub-shap- ed While there was...

BACKGROUND: Ceramic laminate veneer restoring is considered a challenging modality in solving various esthetic dental problems. AIM: The purpose of this study was to investigate the effect digital internal relief space on color ceramic veneer. MATERIALS AND METHODS: An acrylic central incisor model prepared for with standard measures. resin dentotype scanned intraoral computer-aided design/computer-aided manufacturing (CAD/CAM) optical scanner (CEREC Omnicam|Dentsply Sirona). design planned...

Objective: investigation of the microshear bond strength (µSBS) between lithium disilicate with preheated packable composite, flowable composite and resin cement by comparison their before after aging. Material method: Ninety samples were prepared divided into three groups; cement. Materials injected plastic transparent molds (2x2mm) on surface discs pretreated previously hydrofluoric acid 4.5% silane coupling agent. Then each group was 2 subgroups (15 each). The first subgroup didn’t...

Objective: investigation of the microshear bond strength between lithium disilicate with preheated viscous composite, flowable composite and resin cement by comparison their strength.Material method: forty-five samples were prepared divided into three groups; cement.Materials injected plastic transparent molds (2 mm height, 2 diameter) on surface discs previously treated ceramic etchant (hydrofluoric acid 4.5%) primer (silane coupling agent).Microshear test was performed universal testing...

Purpose: To evaluate the fracture force of occlusal veneer restorations using ceramic material (Lithium di‑silicate) and hybrid (VITA Enamic) Computer Aided Desingn/Computer Manufacturer (CAD/CAM) at different thicknesses after thermocycling. Material Method: Thirty CAD/CAM were fabricated from group E (IPS e.max CAD), V divided into subgroups according to thickness 0.3, 0.6, 1 mm. The veneers luted epoxy dies (n=5). specimens subjected thermocycling test then they load until a computer...