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 …

Influence Of Head Posture In Sitting And Standing Positions On The Vertical Dimension Of Rest Value In Dentate Patients: A Comparative Clinical Study, Mia Bardawil, Carole Abi Ghosn, Jihad Fakhouri

International Arab Journal of Dentistry

Introduction: This study investigates the value of the vertical dimension of rest (VDR) in dentate patients in different head postures, supported and unsupported by the headrest of the dental chair, as well as in standing position.

Methods: The VDR was measured and compared in 60 dentate individuals aged 20–25 in different positions (sitting with and without head support, and standing) three times per position. The head was aligned according to the Frankfurt plane when unsupported or standing. Data were analyzed using the Shapiro-Wilk test for normality and ANOVA to assess the effects of posture, gender, and their interaction. …

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, …

Psychosocial And Functional Impact Of Temporomandibular Disorder Subtypes Among Adults: A Cross-Sectional Study In Indonesia, Ni Luh Dewi, Wita Anggraini, Maria Valiente-Lopez, Carolina Marpaung

Journal of Dentistry Indonesia

Background: Temporomandibular disorders (TMDs) affect psychological, functional, and pain-related aspects of oral health-related quality of life (OHRQoL). However, the differential impact of pain-related and non-pain-related TMDs remains limited. This study aimed to evaluate the impact of different TMD subtypes on psychological distress, jaw function, and OHRQoL in young adults and to determine whether pain-related TMDs exert a greater effect than non-pain-related TMDs.

Methods: In this cross-sectional study, 278 university students (aged 18–24 years) were categorized into no TMD (NT), pain-related TMD (PT), intra-articular TMD (IT), and combined TMD (CT). Diagnoses were made using the 5Ts Questionnaire screening tool …

Comparison Of Three Intraoral Scanners For Digital Impressions Of Biologically Oriented Preparation: An In-Vivo Study, Lara Habli, Pascale Habre-Hallage, Hani Tohme, Dany Noujaim, Maryse Nassif, Camille Haddad

International Arab Journal of Dentistry

Introduction: The accuracy of intraoral scanners (IOSs) in capturing a Biologically Oriented Preparation Technique (BOPT) remains uncertain. The aim of this study was to evaluate the accuracy of digital impressions obtained with three intraoral scanners for recording BOPT preparations.

Methods: A maxillary central incisor was prepared following BOPT. After temporization, a conventional polyvinyl siloxane impression was scanned with a desktop scanner to obtain a reference model. Forty-two scans (n D 14 per scanner) were recorded with three IOSs—Trios 3, Sirios, and Helios 680—by a single operator under standardized conditions. Accuracy was assessed using Geomagic Control X by calculating 3D surface …

Influence Of Veneer Thickness On Double Bond Conversion Of Preheated Composite And Self-Adhesive Resin Cement Under Lithium Disilicate Restorations: An In-Vitro Study., Vanessa Kanaan, Marie Abboud, Alexandre Monnier, Dani Irani, Vana Mardirossian, Cynthia Kassis

International Arab Journal of Dentistry

Introduction: This study evaluated the influence of lithium disilicate restoration thickness on the degree of conversion (DC) of a self-adhesive dual-cured resin cement (Bifix SE®; VOCO GmbH, Cuxhaven, Germany) and a preheated composite resin (VisCalor Bulk®; VOCO GmbH, Cuxhaven, Germany).

Methods: Sixty IPS e.max CAD (LTB1) specimens (2 mm, 4 mm, 6 mm; n D 10 per group) were fabricated and divided into six groups. Groups 1–3 were luted with Bifix SE, and Groups 4–6 with preheated VisCalor Bulk. Specimens were conditioned with 5% hydro_uoric acid and silane, then cemented and light cured. Raman spectroscopy was used to determine DC. …

Predictive Analysis For Success And Complications In Dental Implant Therapy Using Artificial Intelligence Models, Vishnu Priya Veeraraghavan, Aysha Jebin A, Isha Dusane, Govind Baheti, Ankita Agarwal, Santosh R Patil

International Arab Journal of Dentistry

Introduction: Dental implant therapy is a predictable treatment for tooth replacement, but its success is influenced by multiple patient, surgical, and systemic factors. Traditional statistical models, such as logistic regression, are limited in capturing nonlinear relationships among these variables. Artificial intelligence (AI) can integrate diverse predictors to enhance clinical risk assessment and improve treatment outcomes.

Objective: To identify key predictors of dental implant success and develop AI-based models capable of accurately forecasting implant outcomes using clinical and surgical parameters.

Methods: This retrospective cohort study analyzed data from 172 patients (219 implants) placed between 2020 and 2021. Patient demographics, systemic health …

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, Basma Refaat Fayad, Islam Heiba Dr, Sara Fikry Dr, Maha Nagy

Dentistry

Objectives: This study compared subtractive and additive fabrication methods regarding their impact on the marginal/internal fit, trueness, and precision of lithium disilicate ceramic veneers. Methods: Laminate veneer preparations on an acrylic tooth were duplicated into twenty-four additively manufactured resin dies. Veneers were digitally designed and fabricated via milling (subtractive) or 3D-printing (additive) (n=12/group). All veneers were scanned. For trueness, the final design served as the reference; for precision, pairwise comparisons were made within each group. For adaptation, the scanned die was the reference. Post-cementation and thermal cycling (10,000 cycles, 5–55°C), marginal adaptation was measured using a digital microscope (×100). Data …

Study Of The Changes In Vestibular Bone Plate Absorption Values After Implant Placement Under Immediate Loading For A Period Of 5 Months Using Cbct: An In Vivo Study, Hassen Merzouk, Samir Habibi, Ben Ali Boutabout

International Arab Journal of Dentistry

Introduction: The study focuses on the success and durability of dental implants, which depends heavily on the bone surrounding them. Changes in this bone affect how the implant looks and functions. The researchers aimed to use CBCT, a modern three-dimensional imaging tool, to accurately measure changes in the thickness of the bone plate on the cheek side (vestibular bone plate) around implants placed in the lower jaw (mandible). Specifically, they looked at bone changes five months after placing implants that were immediately loaded (meaning they were used for chewing right away) in 15 patients who had missing molars or premolars. …

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.

Restoration Of Dental Implants With Screw-Retained Crowns: Optimizing Contact Area Geometry To Prevent Food Impaction, John S. Mamoun D.M.D.

The New York State Dental Journal

A single-unit, screw-retained fixed partial denture or crown, made for a dental implant, may show food impaction between the screw-retained crown and an inter-proximal tooth surface. This restorative error may be due to an open contact or a large interproximal embrasure space volume between the screw-retained prosthesis and an interproximal tooth surface. Food impaction may also occur due to the contact plane of the restoration being parallel with the contact plane of the neighboring tooth instead of a more correct contact plane geometry where both interproximal contact planes converge slightly towards each other to form a “triangular” embrasure space. These …

N Y State Dent J April 2026

The New York State Dental Journal

In the April 2026 issue, the reader will find the following feature articles:

• Resolution of Severe Lateral Open Bite with Surgically Enhanced Orthodontic and Myofunctional Therapies
• Laser-Assisted New Attachment Procedure: A Review
• Restoration of Dental Implants with Screw-Retained Crowns

This issue includes regular columns with regional news impacting the New York membership including editorial and perspectives columns, legal, association activities, component news, continuing education opportunities, and classifieds.

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 …

N Y State Dent J March 2026

The New York State Dental Journal

In the March 2026 issue, the reader will find the following feature articles:

• Pebbly Gingival Nodule in an Older Male
• Extraction of Teeth or Root Tips from Underneath Fixed Partial Denture Abutments or Pontics
• Successful Regenerative Endodontic Therapy of an Immature Dens Evaginatus Mandibular Second Premolar with Apical Periodontitis

This issue includes regular columns with regional news impacting the New York membership including editorial and perspectives columns, legal, association activities, component news, continuing education opportunities, and classifieds.

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 …

Determining The Fidelity Of Multiple Casts Made From A Single Polyvinylsiloxane Impression, Steven Curtis, Steven Sadowsky, Eric Salmon

Oral Health

ABSTRACT

Statement of problem: Indirect restorations may not fit the patient’s teeth, or they may require excessive adjustment. If multiple casts from the same impression are equivalent, dentists can use new pristine casts to determine if fit problems have a laboratory or clinical cause. If the problem is from the laboratory, it may be correctable on a pristine cast.

Purpose: The purpose of this in vitro study is to determine if the areas critical for indirect restoration fit are equivalent on 6 casts made over 29 days from a single polyvinylsiloxane impression.

Material and Methods: Eight impressions were made …

Postoperative Conductive Hearing Loss After Full-Arch-Implantation Surgery Under General Anesthesia In An Oral Submucous Fibrosis Patient: A Case Report, Hao-Chen Wang, Fu-Chuan Tsai, Chia-Che Wu, Chih-Yuan Fang

Journal of Dental Sciences

No abstract provided.

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 …

N Y State Dent J January 2026

The New York State Dental Journal

In the January 2026 issue, the reader will find the following feature articles:

• No Need to Travel the Road to Licensure Renewal Alone
• IPS Subperiosteal Implant for the Maxilla and Mandible
• Amyloidoma of the Palate
• Titanium Hypersensitivity as Possible Cause of Dental Implant Failures

This issue includes regular columns with regional news impacting the New York membership including editorial and perspectives columns, legal, association activities, component news, continuing education opportunities, and classifieds.

Molar-Incisor Hypomineralization: Diagnosis, Management, And Treatment, Giovana Anovazzi Medeiros Dds, Msc, Phd, Bahareh Enghiad Dmd, James R. Boynton Dds, Ms

The Journal of the Michigan Dental Association

Molar Incisor Hypomineralization (MIH) is a qualitative developmental enamel defect affecting at least one permanent first molar. Characterized by high porosity and reduced mineral content, MIH leads to hypersensitivity, post-eruptive breakdown, and increased caries susceptibility. The etiology is multifactorial, typically occurring between birth and four years of age. Management depends on severity, ranging from topical fluorides and sealants for mild cases to stainless-steel crowns or extractions for severe instances. Because porous enamel facilitates bacterial penetration and pulpal inflammation, achieving effective local anesthesia is often difficult, necessitating individualized behavioral management and early intervention to preserve tooth structure.

J Mich Dent Assoc January 2026

The Journal of the Michigan Dental Association

Each month, the Journal of the Michigan Dental Association delivers news, information, and features about Michigan dentistry to our state's oral health community and the MDA's 6,200+ members. It remains the main publication reaching Michigan dentists and is available worldwide through ADA Commons. The January 2026 (Volume 108, No. 1) issue of the Journal is published in a print format to provide updates and insights for Michigan's oral health community and MDA members. Print editions occur every other month beginning with January.

This issue includes feature articles on Pediatric Dentistry and 2025 Life Membership recipients.

Regular monthly contributions include:

• Editorial …

What About Our Teen-Age Patients?, Michelle C. Dziurgot

The Journal of the Michigan Dental Association

This editorial advocates for "mentally treating" teenage patients, specifically those around 14 years of age, as adults. By respecting their concerns and allowing age-appropriate decisions, clinicians can enhance a teen's dental IQ and self-esteem. This approach fosters confidence, communication, and independence, encouraging patients to take accountability for their treatment outcomes. Respectful dialogue leads to better compliance with home care, such as using rotary brushes or wearing retainers. Ultimately, treating teenagers with empathy and valuing their opinions helps them blossom into responsible adults while building lasting professional bonds.

Evaluation Of Retrieval-Augmented Generation (Rag) With Gpt-4o For Maxillofacial Prosthodontics Clinical Questions, Vinsensia Launardo, Merve Koseoglu, Lucky Susanto, Michael Kase, Amanda Colebeck, Heidi Huber, Maribeth Krzesinski, Derry Wijaya, Muhammad Ruslin, Alvin Gerard Wee, Heng-Li Huang, Lih-Jyh Fuh, Cortino Sukotjo

Journal of Dental Sciences

Background/purpose: Large language models (LLMs) offer promising education and clinical decision support to help address the global shortage of maxillofacial prosthodontists. To overcome the lack of source traceability in base LLMs, this study evaluated a retrieval-augmented generation (RAG) architecture for answering complex clinical questions.

Materials and methods: An expert panel consisting of five maxillofacial prosthodontists selected 15 high-complexity clinical questions. Responses were generated using base GPT-4o and a naive RAG-GPT-4o model built with domain-specific literatures. Outputs were evaluated across five parameters using a 5-point Likert scale and analyzed via Mann-Whitney U tests.

Results: No statistically significant differences …

Light-Curing Staining Materials And Application Techniques For Dental Resin Restorations, Fu-Chuan Tsai, Kuo‑Ning Ho, Yu-Chieh Lin, Wei-Chun Lin

Journal of Dental Sciences

No abstract provided.

The Evolution Of Artificial Intelligence And Deep Learning In Removable Partial Denture Design, Fu-Chuan Tsai, Hsin-Hua Chou, Takashi Saito, Wei-Chun Lin

Journal of Dental Sciences

No abstract provided.

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 …