Prosthodontics and Prosthodontology Commons^™

Effect Of Multiple Uses And Sterilization Of Abutment-Level Peek Implant Scan Bodies On Complete-Arch Intraoral Digital Scans Trueness: An In Vitro Study, Georgio Zeidan, Maryse Nassif, Ghida Lawand, Hani Tohme

International Arab Journal of Dentistry

Introduction: Polyetheretherketone (PEEK) implant scanbodies (ISBs) offer favorable optical properties for digital impressions but may be susceptible to wear and dimensional changes with repeated clinical use and sterilization. While previous studies have examined these variables separately, no investigation has simultaneously evaluated their combined effects on abutment-level PEEK ISBs in complete-arch implant situations.

Aim: To evaluate the effect of multiple uses and autoclave sterilization of abutment-level PEEK implants can bodies on the trueness of complete-arch intraoral digital scans in an in vitro setting.

Methods: A maxillary edentulous reference cast with four implants in an All-on-4 configuration was fabricated …

Comparative Evaluation Of The Effect Of Different Desensitising Methods On The Retention Of Crowns Cemented With Resin Modified Gic: An In-Vitro Study, Zainab Inayatullah, Kartika N. Kumar, Punit Rs Khurana, Anju Aggarwal, Aditya Chaudhary, Naila Perween

International Arab Journal of Dentistry

Introductions: This in vitro study aimed to evaluate and compare the effect of three different desensitizing methods— Admira Protect, dentin bonding agent (Tetric N Bond), and diode laser—on the retention of porcelain-fused-to-metal (PFM) crowns cemented with resin-modified glass ionomer cement (RMGIC).

Methods: Forty extracted, non-carious human premolars were prepared for full-coverage crowns and divided into four groups (n = 10): Group I (Control, no desensitizer), Group II (Admira Protect), Group III (Dentin bonding agent), and Group IV (Diode laser). Standardized tooth preparations were performed and PFM crowns were fabricated and cemented using RMGIC (RelyX Luting 2, 3M ESPE). …

Comparing Condylar Parameters Assessed By Ultrasonic And Mechanical Axiography: An In Vivo Pilot Study, Mark Salame, Amine El Zoghbi, Marina Daher, Carole Abi Ghosn, Paul J. Boulos

International Arab Journal of Dentistry

Objectives: The objective of this clinical pilot study was to compare the condylar parameters (condylar path inclination and Bennett angle) obtained from two different axiographs: a mechanical axiography system and an ultrasonic axigraphy system, and thus to judge the reliability and degree of accuracy of the mechanical axiography compared with the ultrasonic axiography considered as a reference technique.

Methods: Eleven candidates, aged between 20 and 25 years, were selected (n = 11) following strict inclusion and exclusion criteria. Each individual underwent two axiographic recordings by a single experienced operator. The first one was done with an ultrasonic axiograph, …

Effect Of Home Bleaching With Carbamide Peroxide And Over-The-Counter Products On Stained Supra-Nano-Filled Composite: An In-Vitro Study., Lynn Harrouk, Pascale Habre, Samar Bou Jaoude, Carina Mehanna Zogheib

International Arab Journal of Dentistry

Objective: This study evaluated the impact of home and over-the-counter (OTC) bleaching products, compliant with SCCS regulations, on color changes in tea-stained supra-nano filled composite, using the CIEDE2000 formula.

Methods: One hundred Estelite® Sigma Quick discs were fabricated, thermocycled, and tea-stained for 12 days. Samples were divided into four groups: Opalescence 15% carbamide peroxide (CP) gel, White Dental Beauty 6% hydrogen peroxide (HP) strips, Pola Luminate 6% HP brush-on gel, and a control. Color was measured at baseline, post-staining, and post-bleaching using a VITA EasyShade spectrophotometer. ΔE₀₀ values were analyzed with Kruskal-Wallis and Dunn’s post-hoc tests (p < 0.05).

Results: All bleaching …

Digital Assessment Of Subtractive And Additive Cad/Cam Fabrication Methods On The Fit And Accuracy Of Lithium Disilicate Veneers, Sara Fikry Elshafei Dr, Islam Heiba Dr, Basma Fayyad, Maha Nagy

Dentistry

No abstract provided.

Influence Of Ceramic Thickness And Cad/Cam Ceramic Materials On The Fracture Resistance Of Indirect Restorations: An In Vitro Study, Lara El Hanach, Karim Corbani, Nabil Ghosn, Ryan Harouny, Cynthia Kassis

International Arab Journal of Dentistry

Objectives: This in-vitro study aimed to evaluate the impact of different CAD/CAM materials (IPS e.max® CAD and Cerasmart®) and thicknesses (0.7 mm, 1 mm, and 1.5 mm) on the fracture resistance of indirect overlay restorations.

Methods: Sixty-three human third molars were divided into 7 groups (n=9) based on material and thickness, including a control group of 9 sound teeth. Only 54 specimens were prepared using a thin-section cutting machine, scanned, and their scans were used to fabricate overlays from different materials and thicknesses. After adhesive cementation, the overlays underwent thermal cyclic loading (5,000 cycles between 5°C and 55°C). A universal …

Effect Of Dynamic Fatigue Loading On The Adaptation And Retention Of Maxillary Single Dentures Reinforced With Digitally Constructed Zirconia And Cobalt–Chromium Frameworks, Ghada Elgindy, Fardos N Rizk, Marwa Ezzat Sabet, Hebatallah Tarek Mohamed

Dentistry

Background. The impact of dynamic fatigue loading on denture adaptation and retention is clinically important. Zirconia and cobalt–chromium (Co–Cr) frameworks enhance denture strength, but their performance under cyclic loading remains unclear. Objectives. The aim of the study was to evaluate the adaptation and retention of maxillary single dentures reinforced with digitally constructed Co–Cr or zirconia frameworks after a simulated 1 year of function. Material and methods. Three types of maxillary single dentures were constructed on maxillary master casts. Group A included maxillary dentures without reinforcement (control group), whereas groups B and C encompassed maxillary dentures reinforced with digitally designed and …

The Effect Of Cementation Load, Unload Time And Storage Time On Film Thickness And Μtbs Durability Of Dual-Cure Resin Cements. An In-Vitro Study, Sara Adel Botros, Abdullah Hassanien, Nader Maher Tadros, Farid Sabry El-Askary, Salvatore Sauro

Dentistry

No abstract provided.

Comparing Educational Pathways For Denturists To Become Maxillofacial Prosthetic Specialists In The Us And The Uk, Minseok Kim

Oral Health

Abstract

In the absence of formal training, licensure, and professionalism, this scientific literature review will seek to include denturists in the American maxillofacial prosthetics industry. Denturists are oral health professionals who perform oral examination, design, manufacture, and place removable oral prostheses. In other regions of the world, they are also known as clinical dental technologists and dental prosthetists. This practice is not widespread in the US. The review can also be assessed on the model mediated by PRISMA, which is concentrated on the experiences of international education in the United Kingdom, Canada, and Australia, where the concentration further revolves around …

Endodontic Access Through Zirconia Crowns: A Comparative Evaluation Of 3d Guided Versus Free-Handed Techniques, Maryam Alrughaib

Theses and Dissertations

Objective:

Accessing canals through full-coverage zirconia crowns is challenging and may increase the risk of misdirection, excessive dentin removal, and prolonged chair time. Guided endodontic access has been proposed to improve efficiency and precision. This study compared the accuracy and time efficiency of guided versus free-hand endodontic access through zirconia restorations. The hypothesis was that guided access would enhance canal localization precision and significantly reduce access time.

Methods:

Thirty-two extracted maxillary premolars were restored with 1-mm–reduced monolithic zirconia crowns (3Y-TZP, Katana HTML, Kuraray, Japan) and mounted in Modupro models. Teeth were assigned to two groups (n = 16 each): guided …

Adhesion Performance Of Conventional And High-Translucency Zirconia: Effects Of Airborne-Particle Abrasion And 10-Methacryloyloxydecyl Dihydrogen Phosphate Treatments, Chia-Ling Li, Li-Li Kang, Jui-Che Lin, Shu-Fen Chuang

Journal of Dental Sciences

Background/purpose: High-translucency zirconia exhibits different microstructure and composition, which may influence their responses to mechanical and chemical treatments, affecting resin–zirconia adhesion. This study aimed to evaluate the adhesive behaviors of conventional and high-translucency zirconia, focusing on surface modifications induced by airborne-particle abrasion (AA) and 10-methacryloyloxydecyl dihydrogen phosphate (MDP).

Materials and methods: Disk-shaped specimens were fabricated from six zirconia materials: CerconBase, CerconHT, and VitaHT (3Y-TZP); VitaST (4Y-PSZ); and CerconXT and VitaXT (5Y-PSZ). Specimens were air-abraded with alumina particles at 0.25 MPa. Micromorphology and roughness were analyzed using scanning electron microscopy (SEM), profilometry, and atomic force microscopy (AFM). Surface chemical composition …

Effect Of Different Deep Margin Elevation Thicknesses Versus No Elevation On The Fracture Resistance Of Indirect Restorations: An In-Vitro Study, Fleurene Daraze, Karim Corbani, Brigitte Douaihy, Hadi Jomaah, Cynthia Kassis

International Arab Journal of Dentistry

Objectives: This in-vitro study aimed to evaluate whether different deep margin elevation (DME) thicknesses (1 mm, 2 mm, 3 mm) influence the fracture resistance and fracture type of molars restored with CAD/CAM lithium disilicate overlays, compared to no elevation.

Methods: Seventy-six extracted human molars were randomly divided into four groups (n=19) based on Deep Margin Elevation thickness: 0 mm (control), 1 mm, 2 mm, and 3 mm. Standardized Class II cavities were prepared with cervical margins extending 1 mm below the cementoenamel junction. DME was performed using a low-viscosity hybrid composite. Using a CAD/CAM workflow, overlays were designed and milled …

Impact Of Adhesive Curing Mode And Dentin Sealing On Bond Strength Of Cad/Cam Resin Composite, Sara Adel Botros, Mohamed Fouad Haridy, Nermin Mohieldin Abdelmohssen

Dentistry

No abstract provided.

Effect Of Acid-Containing Drinks On Surface Roughness And Bacterial Accumulation Of Different Types Of Denture Base Materials, Sara Fikry Dr, Ayman Amin, Eman Khedr, Fatma Makkeya

Dentistry

No abstract provided.

Effect Of Margin Thickness And Cement Gap On The Fabrication And Fit Accuracy Of Additively Manufactured Crowns In Definitive Resins With Different Filler Content, Mustafa Borga Dönmez, Gülce Çakmak, Çiğdem Kahveci, Amir H. Nejat, Burak Yilmaz, Pinar Altinci

School of Dentistry Faculty Publications

PURPOSE: To evaluate how commercially available composite resins in varying filler content affect the fabrication and fit accuracy (trueness and precision) of additively manufactured (AM) definitive crowns with different margin thickness and cement gaps by comparing them to subtractively manufactured (SM) polymer-infiltrated ceramic crowns. MATERIALS AND METHODS: Two identical unprepared mandibular right first molars were prepared by an experienced prosthodontist for crowns with either 0.5 mm or 1.0 mm chamfer margins, verified using silicone indexes and a periodontal probe, and then digitized with an industrial-grade scanner. These scan files were used to design reference crowns with either 50-µm or 80-µm …

Evaluation Of Marginal And Internal Fit In Cad/Cam-Fabricated Indirect Restorations, Sara Adel Botros, Mohamed Samy Salama, Hend Sayed Ahmed, Ayman Helmy

Dentistry

No abstract provided.

Bond Strength Of Thermally Aged Cad/Cam Hybrid Nanoceramic Repaired With Nanohybrid Resin Composite, Mostafa Aboushahba, Sara H. Younis

Future Dental Journal

Purpose. To assess shear bond strength (SBS) of nanohybrid resin composite used to repair CAD/CAM Hybrid Nanoceramic ceramic after various surface treatments.

Materials and Methods. SHOFU HC Hybrid Ceramic disks were sliced to obtain circular-shaped specimens (n= 30) were obtained. All specimens were thermocycled (5000 thermal cycles), then specimens were divided into three groups according to the surface treatment performed (sandblasting, HF acid etching, and laser irradiation) (n = 10). Repair procedure with nanohybrid resin composite was performed. SBS values were obtained, and failure modes were determined. Data were statistically analyzed (P ≤ 0.05). Results. The highest SBS …

Effect Of Smoking And Finishing And Polishing Protocol On Color Stability And Surface Roughness Of Resin Composite, Fatma Makkeyah, Mohamed Samy Salama, Sara Adel Botros, Mohamed Shamel, Mahmoud Al Ankily

Dentistry

Purpose To investigate the influence of smoking and finishing and polishing protocol on color stability and surface roughness of resin composite. Materials and methods Seventy-two discs fabricated from supra-nanofilled composite were divided to 6 groups according to: Tobacco Product (Conventional Cigarette/CS and Heated Tobacco/HTP); and Finishing and Polishing Protocol (Control/C, Multi-step finishing system/FS, and Medium-grit abrasive bur + two-step polishing system/ PS). After finishing and polishing, specimens were exposed to a total of 600 cigarettes, divided into 20 each day, simulating 30 days of smoking. Color parameters were detected using a spectrophotometer. Surface roughness (Ra) was measured before and after …

Effect Of Load Removal On Bonding Of Resin Cement To Cad/Cam Composite, Sara Adel Botros, Farid Sabry El-Askary, Nader Maher Tadros, Abdallah Hassanien, Salvatore Sauro

Dentistry

No abstract provided.

Evaluation Of Marginal And Internal Fit In Cad/Cam-Fabricated Indirect Restorations, Mohamed Salama, Sara Adel Botros, Hend Sayed Ahmed

Dentistry

Objectives: This study investigated the effect of marginal adaptation and internal fit of premolar teeth restored with indirect overlays, fabricated from different CAD/CAM materials (lithium-disilicate and composite blocks). Materials and Methods: Twenty-two intact premolars with standardized concave chamfer overlay preparation were divided into two groups (n= 18) Group (A): lithium disilicate blocks and Group (B): composite blocks. All groups cemented with dual cured resin cement. After 24h of storage at 37°C followed by thermocycling. Marginal gap evaluation evaluated using a stereomicroscope at x50 magnification at 4 points at each surface. Specimens were then sectioned mesiodistally to assess internal fit. Statistical …

Evaluation Of Microtensile Bond Strength Of Composite Under Three Aging Conditions: A Comparative In Vitro Study, Fadi Hammoud, Louis Hardan, Maryse Nassif, Tala El Ghoul, Georges Najjar, Cynthia Kassis

International Arab Journal of Dentistry

Objectives: To investigate the effects of different in-vitro artificial aging protocols on the micro tensile bond strength (µTBS) of composite restorations applied to dentin.

Methods: A total of 88 teeth were prepared on dentin and divided into three distinct aging conditions and a control group : G1) Control group with no aging (n=22); G2) Thermal Cycling (Thermocycling) involving 10,000 cycles between 5°C and 55°C, with a dwell time of 20 seconds (n=22); G3) Mechanical Loading (Cyclic loading) with a 50 N load, a frequency of 1.5 Hz, and 10,000 cycles (n=22); G4) Combined Thermo-mechanical cyclic loading (TMCL) using …

Color Stability Of Conventional, 3d-Printed, And Milled Denture Teeth After Immersion In Coloring Agents: An In Vitro Study, Dany Nassif, Nancy Chemaly, Rim Bourgi, Carole Abi-Ghosn, Louis Hardan, Jihad Fakhouri

International Arab Journal of Dentistry

Objectives: This study investigates the color stability of denture teeth made from different materials when subjected to various staining solutions.

Methods: Forty-five A1 shade upper central incisors were divided into three groups: prefabricated, 3D printed, and milled denture teeth (N=45). Each group was further divided into three subgroups, with teeth immersed in coffee, wine, and artificial saliva for up to 120 days (n=5). ∆E values for color change were measured using an Optishade colorimeter.

Results: The type of teeth, type of solution, and immersion time had a significant effect on color stability (p < 0.001). Interactions between the three variables were all significant (p < 0.001). Conventional denture teeth showed slight color changes with saliva (ΔE = 1.256 by day 120), moderate changes with wine (ΔE = 2.893), and more significant changes with coffee (ΔE = 5.208). Milled denture teeth exhibited no color changes with saliva, noticeable changes with wine (ΔE = 5.359), and moderate changes with coffee (ΔE = 3.137). 3D printed denture teeth showed no color changes with saliva, but increased changes with wine (ΔE = 2.533) and highly significant changes with coffee (ΔE = 10.546). Coffee consistently caused the highest ΔE values, especially in 3D printed teeth.

Conclusions: The study …

Comparative Evaluation Of Marginal And Internal Fit Of Zirconia Crown Designed Using Artificial Intelligence And Cad-Cam Software: A Systematic Review, Pritesh Gangde, Sweta Kale Pisulkar, Arushi Beri, Pritam Das

International Arab Journal of Dentistry

Introduction: The long-term performance of dental restorations depends on their internal and marginal fits. Improvements in the fit of restorations, especially zirconia crowns, have been investigated through the use of diverse materials, manufacturing processes, and impression techniques.

Objectives: The purpose of this review was to examine the internal and marginal fit of zirconia crowns made with CAD/CAM software with artificial intelligence (AI) software.

Methods: Using a combination of keywords and MeSH terms, the literature search was carried out across seven databases: PubMed, Scopus, Web of Science, Cochrane Library, Embase, ProQuest, and ScienceDirect from inception till 1st of …

Effect Of Build Orientation On The Fabrication Trueness Of Additively Manufactured Implant-Supported Complete Arch Interim Fixed Prostheses, Amir H. Nejat, Mehmet Esad Güven, Gülce Çakmak, Burak Yilmaz, Mustafa Borga Donmez

School of Dentistry Faculty Publications

PURPOSE: To evaluate how build orientation affects the fabrication trueness of additively manufactured implant-supported complete arch prostheses by comparing them to subtractively manufactured high-impact polymer-based prostheses. MATERIALS AND METHODS: An edentulous maxillary model with four implants at canine and first molar regions bilaterally was digitized (ATOS Core 80 5MP) to design a reference implant-supported complete arch prosthesis standard tessellation language file (RF-STL). The STL file was used to manufacture prostheses additively in five different orientations according to the build platform (AM-0, 0-degree; AM-15, 15-degree; AM-30, 30-degree; AM-45, 45-degree; AM-90, 90-degree) or subtractively (SM-HIP, control) (n = 10). The prostheses were …

Resin-Build-Up As A Direct Monoblock Concept For Root Canal Dentin, Core, And Crown Restoration On Anterior Endodontically Treated Tooth, Citra Kusumasari, Takashi Hatayama, Junji Tagami, Yasushi Shimada Prof.

Journal of Dentistry Indonesia

The long-term clinical performance of restoration in endodontically treated teeth (ETT) is an essential yet complicated strategy to achieve it. A resin-build-up tooth with higher elastic moduli is a minimally invasive strategy to decrease the risk of catastrophic root fracture. Additionally, intracanal resin composite anchorage simplifies the restorative procedure and increases the bonding. Objective: This case report describes a resin-build-up tooth restoration using the direct monoblock concept to replace a failed metal post and core and porcelain fused to metal (PFM) crown on the maxillary right central incisor. Case report: A 50-year-old man attended a dental university hospital …

Minimally Invasive Treatment Of Molar Incisor Hypomineralization Without Using Burs: Experiences Via A Case Series In Vietnam, Võ Truong Nhu Ngoc, Nguyen Phương Huyen, Le Khả Anh, Phan Thi Thu Hang, Hoang Kim Loan, Ta Thành Dong

Journal of Dentistry Indonesia

Mild form of molar-incisor hypomineralization (MIH) on anterior teeth are posing great challenges to dental practitioners as it can have a huge aesthetic impact. In terms of deep MIH-related lesion below the healthy enamel, highly invasive methods for approaching the lesion body and removing the entire hypomineralized enamel using burs could lead to failures including aesthetic problems and even further tooth structure damage to the affected teeth. Case report: To resolve t his issue, we have proposed a modified resin infiltration technique based on the minimally invasive philosophy. In this study, we would like to report three specific cases …

Clinical Features Of Anterior Teeth Affected By Molar Incisor Hypomineralization And Treatment Experiences Using Transilluminated Light: A Cross-Sectional Study, Phạm Thanh Ha, Nguyễn Phương Huyen, Phạm Kim Thanh, Lương Minh Hang, Trần Tuấn Anh, Võ Như Trương Ngoc, Lê Khả Anh, Trần Anh Tuan, Tạ Thành Dong

Journal of Dentistry Indonesia

Classification and resin infiltration treatment of MIH-related permanent anterior teeth are increasingly receiving attention nowadays. Objective: The study aims to evaluate the characteristics of these teeth; and to assess factors regarding treatment. Methods: A cross-sectional study was conducted using transilluminated and reflected light photographs, and the lesion was classified according to its color, size, type, heterogeneity and surface integrity. The data were analyzed using a chi-square test and multivariate logistic regression analysis to evaluate enamel craze lines (ECL), post-eruptive breakdown (PEB), and treatment procedures. Results: 73 teeth from 46 patients were included, in which 53 teeth had been treated. Size …

Efect Of Conventional Cigarette Smoking And Recent Heated Tobacco Products On Cad/ Cam Restorative Materials, Fatma Makkeyah, Omar Elsergany, Mohamed Shamel, Mahmoud Al Ankily

Dentistry

No abstract provided.

The Effect Of Using Two Sintering Cycles On The Optical Properties Of Gradient Multi-Layered Zirconia (In Vitro Study), Fatma Makkeyah, Passent Elghalab, Maged Zohdy, Mostafa Nour

Dentistry

No abstract provided.

The Effect Of Preparation Design And Thermal Cycling On The Marginal Accuracy Of Hybrid Ceramic Laminate Veneers, Esraa El Bably, Ossama Saleh Abdelghany, Mostafa Aboushahba, Shereen Ahmed Nossair

Future Dental Journal

Aim: This study investigated the effect of preparation design and thermal cycling on the marginal accuracy of hybrid ceramic laminate veneers. Materials and Methods: A total of twenty 3D printed dies of central incisors prepared with 2 preparation designs; butt joint and palatal wrap design were fabricated. Each type of preparation was assigned into 2 subgroups (n=5/each subgroup) according to the type of material used for fabrication of the laminate veneer; hybrid ceramic and lithium disilicate (served as control). Marginal discrepancy was evaluated using a digital microscope before and after thermocycling. Results: Statistically analysis of marginal gaps revealed that before …