Prosthodontics and Prosthodontology Commons^™

The Study On Surface Roughness And Corrosion Resistance Of Electropolished Laser Powder Bed Fusion Ti-6al-4v Eli Alloy, Venus Chatpaiboonwat

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Ti6Al4V ELI alloy produced via Laser Powder Bed Fusion (L-PBF) has drawn interest for usage in dental applications. However, surface finishing is an important property that can be managed by various methods. The purpose of this study was to investigate the effects of electropolishing (EP) on the surface roughness and corrosion resistance of L-PBF Ti6Al4V ELI alloy. The present study explored the influence of current density, voltage, and distance on the surface quality and corrosion behavior. The results showed that EP significantly reduced the surface roughness and enhanced corrosion resistance of printed Ti6Al4V ELI alloy with the best result …

Adaptation Of Conventional Versus Digitally Fabricated Auricular Prosthesis: A Randomized Clinical Trial, Sara Fikry, Fatma Mohei El Mogei Dr, Mohamed El Khashab Prof, Amal Rekabi Prof

Dentistry

Aim: This study aimed to compare digitally fabricated auricular prostheses to conventional prostheses, regarding adaptation to defect site in patients with auricular defects.

Subjects and methods: Fifteen patients were recruited for auricular prosthetic reconstruction. Endosseous implants were placed, then patients were assigned into two groups. In control group, ear models were processed on stone cast obtained from conventional impression. In intervention group, computed tomography and optical scanning were combined to obtain a virtual model with digital analogues over which ear models were designed and printed. Ear models of both groups were seated, and adaptation was measured on the patient using …

Creating Smiles With Digital Workflow And Matrix Transfer Technique In Customizing Personality-Based Smile Designing, Jahnavi Purna Gorripati, Surekha Godbole

International Arab Journal of Dentistry

Introduction: This report is a presentation of a clinical case that follows the Visagism concept for 2D planning and, CAD (Exo CAD) for 3D desiging along 3D printed diagnostic wax-up model for closure of anterior spacing.

Case presentation: A 24-year-old man presented with midline diastema and anterior spacing 11-13, 21-23 and wants a smile designed. This concern was solved following a smile design (VisagiSMile) planning digitally for diagnostic wax and printing a 3D model. The matrix transfer technique has been used to directly convey planned information from 3D-printed diagnostic wax-up to definitive restorations.

Conclusions: In this day …

Testing The Strength Of Thin Feather-Edge Monolithic Multilayered Zirconia Crowns: A Pilot Study With A Novel Acoustic Test, Estelle Saab, Camille Haddad, Maher Abboud, Maha Daou, Amine Zoghbi

International Arab Journal of Dentistry

Introduction: Limited research has explored the mechanical characteristics of recently introduced multilayered monolithic zirconia (MZC) crowns with feather-edge margins design. Moreover, most of the conventional techniques for evaluating the mechanical behavior of brittle dental ceramics rely on destructive tests, making it impossible to precisely evaluate real strength values due to premature crack initiation detection failure.

Objectives: The main objective of the study was to assess the load capacity of translucent multilayered monolithic zirconia crowns with feather-edge margin thicknesses of 0.4 mm and 0.5 mm. Additionally, the research introduced a novel non-destructive acoustic emission testing (AET) technique in the …

Investigation Of Fracture Resistance With Different Diameters Of Polyetherketoneketone Post And Core Materials: A Pilot Study, Maya Kabbara, Ryan Harouny, Habib Rahme

International Arab Journal of Dentistry

Objectives: The primary objective of this study is to investigate the resistance to fracture of Polyetherketoneketones PEKK, used as post and core by fabrication in different diameters in the canal, and comparing the test results for each group.

Methods: Thirty extracted mandibular premolars were selected, endodontically treated and prepared to receive the post and cores milled from polyetherketoneketone disk. The specimens were randomly divided into five groups (n = 6) respectively: group 1 received pekk post with diameter = 0.70 mm, group 2 received pekk post with diameter = 0.90 mm, group 3 received pekk post with diameter …

Clinical Outcomes Of Primary Anterior Esthetic Crowns In Pediatric Dentistry, Jenan Alahmad

Theses and Dissertations

Clinical Outcomes of Primary Anterior Esthetic Crowns in Pediatric Dentistry - A Prospective Cohort Study

By: Jenan Alahmad, BDS

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University.

Virginia Commonwealth University, 2024

Thesis Advisor: Parthasarathy Madurantakam, DDS, MDS, PhD

Department of Pediatric Dentistry

BODY

Purpose: This prospective cohort study aimed to compare the effectiveness of restoring maxillary anterior teeth in children (aged 3-6 years) with three different materials: Zirconia Crowns (ZC), Resin Composite Crowns (RC), and Pre-veneered Stainless-Steel Crowns (PVSSC). The study aims to assess the Oral …

การศึกษาการสึกระหว่างโคบอลต์โครเมียมและวัสดุเซรามิกที่ใช้ในงานทันตกรรมดิจิตอล, มรกต ไทยรัตน์

Chulalongkorn University Theses and Dissertations (Chula ETD)

วัตถุประสงค์: ทำการศึกษาสภาวะจำลองเพื่อวัดการสูญเสียปริมาตรจากการสึกหลังจากจำลองการขัดถู 250,000 รอบของโลหะผสมโคบอลต์โครเมียม (CoCr) กับวัสดุที่ใช้ทำการบูรณะฟันหลักห้าชนิด วัสดุและวิธีการ: เตรียมตัวอย่างทดสอบตัดเป็นสี่เหลี่ยมจำนวนชนิดละ 8 ชิ้น (5 x 5 x 2 มิลลิเมตร) จากโลหะผสมที่ไม่มีทองผสม (NP), ลิเธียมไดซิลิเกต (EM) เธียมไดซิลิเกตเสริมความแข็งแรง (TR) เซรามิคที่มีเรซินเป็นฐาน (CM) และเซอร์โคเนีย (ZR) ตัวอย่าง EM TR และ ZR ได้รับการเผาตามคำแนะนำของผู้ผลิต แท่งโลหะผสมโคบอลต์โครเมียมสร้างขึ้นโดยการหล่อโลหะแบบไล่ขี้ผึ้ง จำลองการสึกแบบสององค์ประกอบด้วยเครื่องจำลองการสึกจากการขัดถู จำนวน 250,000 รอบ วัดการสูญเสียปริมาตรของชิ้นงานทดสอบโดยใช้เครื่องวัดความหยาบพื้นผิว การสูญเสียปริมาตรของแท่งโลหะผสมคำนวณโดยการความยาวที่ลดลงและรัศมีของพื้นที่ที่เกิดบริเวณที่สึก วิเคราะห์ข้อมูลทางสถิติโดยใช้ MANOVA (pNP>ZR) การสูญเสียปริมาตรของแท่งโลหะหลังการสึกในกลุ่ม CM น้อยกว่าในกลุ่ม EM และ NP ในขณะที่กลุ่มอื่น ๆ ไม่มีความแตกต่างกันอย่างมีนัยสำคัญ

Comparison Of The Failure Between Conventional Pmma And Milled Pmma Full Arch Maxillary Interim Prosthesis Fixed On 4 Implants: An In Vitro Study, Tatiana Bou Sakr, Hani Tohme, Natalia Bou Sakr, Victor Ghoubril, Carole Abi Ghosn Yared

International Arab Journal of Dentistry

Objectives: The principal objective of this study was to compare the failure load between the conventional heat polymerized PMMA and the CAD/CAM milled PMMA interim full arch implant prostheses. The secondary aim was to evaluate the success of the distal extension of the temporary PMMA prosthesis.

Methods: A metallic edentulous upper arch model with 4 Straumann screw-retained abutment digital analogs was used to create 15 specimens for each of the 2 groups: Conventional and milled. Failure load was measured on 5 different regions on the left and right side of each specimen with the YLE universal testing machine: …

Endocrown, From Preparation To Bonding: Case Report, Amira Yousfi, Rihab Dakhli, Jilani Saafi, Belhassen Harzallah

International Arab Journal of Dentistry

The restoration of endodontically treated teeth is a real challenge, particularly teeth with extensively damaged coronal tissues. The use of post-retained restorations has been discussed because of the potential tooth weakening due to the additional removal of sound dental structures. In fact, long-term prognosis of a devitalized tooth is closely related to the coronal restoration’s quality and the remaining dental structure. With the development of adhesive dentistry and minimally invasive preparation, new approaches have emerged. Among them, the endocrown which is monolithic ceramic bonded restoration, anchored to the internal portion of pulp chamber and cavity margins that have been used …

Implant Overdenture Abutment Loosening Under Hyperbaric Conditions, Zana Jamal Al-Saloum

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objectives: To investigate the effect of various hyperbaric air pressures on the loosening of LOCATOR® (ZEST Anchors, LLC, Escondido, CA USA) overdenture abutments.

The pressure conditions tested are meant to simulate scuba diving conditions in edentulous patients that are restored with implant-retained tissue-supported overdentures. Another sub-goal of this study is to determine whether or not there is a difference in LOCATOR® loosening when the sample is exposed to six cycles/dives as opposed to one cycle/dive.

Methods: 36 ZimVie Tapered Screw Vent Implants with a 3.5mm diameter implant platform, and a 2.5mm diameter (and 1.5mm deep) internal hexagon were …

Integration Of Massive Open Online Course (Mooc) In Conventional Teaching And Learning For Fixed Prosthodontics - A Case Study, Nor Faharina Abdul Hamid, Rohana Ahmad, Tong Wah Lim, Nur Hafizah Kamar Affendi, Tengku Fazrina Tengku Mohd Ariff, Melati Mahmud, Siti Mariam Ab Ghani

Journal of Dentistry Indonesia

The potential for Massive Open Online Courses (MOOCs) in clinical dentistry remains vague and inadequately explored. Objectives: The study aims to obtain insight into the development of MOOCs in Fixed Partial Dental Prostheses (FPDPs) and to assess students’ learning preferences, module quality, and interface usability. Methods: The MOOCs was created by seven academicians with prosthodontic backgrounds. After completing the MOOCs and three complementary online discussion sessions, the students (n = 89) were invited to participate in an online survey. SPSS version 23 was used to calculate the frequency, percentage, mean, and standard deviation of categorical data (SD). Results …

Shore A Hardness And Fourier Transform Infrared Spectrophotometer Analysis Of Thymol-Modified Maxillofacial Silicone Material, Manar Hussein Ramadhan, Faiza M. Abdul-Ameer

Maaen Journal for Medical Sciences

The longevity of any prosthesis depends on the materials from which it was fabricated, which is why defects in the material properties may reduce the service life of the prosthesis and necessitate its replacement. This study aims to test the influence of incorporating different weight percentages of thymol micro-powder into the maxillofacial silicone matrix on Shore A hardness of the silicone. Room-temperature vulcanised VST-50 maxillofacial silicone was used to prepare the study specimens. Thymol micro-powder was incorporated into the silicone matrix in two percentages (0.75 wt.% and 1 wt.%). 30 specimens were prepared and then subdivided equally into three groups, …

Use Of A 3d Intraoral Scanner For Prosthetic Rehabilitation Of Cocaine-Induced Oronasal Fistula, Anita Agarwal Bds, Dmd, Mph, Timothy Levine Dmd, Victor Badner Dmd, Mph

The New York State Dental Journal

A novel method using a 3D intraoral scanner (IOS) is used to overcome difficulties in obtaining conventional impressions to fabricate an obturator for a posteriorly located oronasal fistula secondary to chronic nasal cocaine use.

N Y State Dent J November 2023

The New York State Dental Journal

In the November 2023 issue, the reader will find the following feature articles:

• Verruciform Xanthoma
• Use of a 3D Intraoral Scanner for Prosthetic Rehabilitation of Cocaine-Induced Oronasal Fistula
• Adenoid Ameloblastoma with Dentinoid

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 Back Page Commentary: Let’S Talk About The Real World, Danielle Gehlert Dds

The Journal of the Michigan Dental Association

Dr. Danielle Gehlert, a private practitioner, writes that in the realm of continuing education for dental professionals, there's a need for a shift in focus from idealized, "sexy" cases to real-world patient scenarios. This commentary calls for seminars and programs emphasizing long-term restorative planning, including successes and failures. The practical considerations of patient financial limitations and willingness to engage in dental care must be integral to treatment plans. Real-world cases should reflect the diverse situations dental practitioners encounter and the ethical responsibility to provide affordable and effective treatment options.

Hollow Bulb Definitive Obturation Of A Post-Covid Mucormycosis Maxillectomy Defect – A Case Report., Ravi M B, Prakash P, Sai Pranathi Putta, Anupama Aradya, Rashmi S, Dhakshaini M R

International Journal of Health and Allied Sciences

The novel Coronavirus, also known as SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2), causes COVID-19.In the wake of COVID-19, incidences of mucormycosis were rising alarmingly, especially rhino-orbital-cerebral mucormycosis.Most cases required surgical intervention followed by the fabrication of obturators.A hollow obturator is the most practical, convenient, and cost-effective solution for prosthodontic rehabilitation. A patient with pain overthe maxillary region (left) reported to the department of Prosthodontics and Crown & Bridge. His past medical history revealed that he tested and recovered from SARS-CoV-2. Clinical, radiographic, and smear tests confirmed rhino-cerebral mucormycosis with post covid pneumonia. Surgical left partial maxillectomy performed 4 months …

Fabrication And Characterization Of Nylon 6 Fiber Via Wet Spinning Method For Application As A Reinforcing Material For A Direct Dental Bridge, Dissa Kirana Wijaya, Nina Djustiana, Yanwar Faza, Arief Cahyanto, Andri Hardiansyah

Makara Journal of Science

Nylon is a biocompatible thermoplastic polymer that is well known for its excellent fracture resistance, making it suitable for fabricating fiber-reinforced composite (FRC)-based dental bridges. FRC is widely used in dentistry. This study aimed to investigate the structural and morphological characteristics of the nylon 6 fiber prepared using five different weights of nylon 6 dissolved in formic acid. The nylon 6 fiber was successfully fabricated via a simple wet spinning method using water as a coagulant. The fiber was then characterized using Fourier transform infrared (FTIR) spectroscopy, optical microscopy, and scanning electron microscopy. FTIR spectroscopy confirmed the presence of nylon …

Bond Strength Of Reline Materials To 3d-Printed Provisional Crown Resins, Jorge Palavicini, Sherrod L. Quin, Wael Zakkour, Karim Zakkour, Safa Manafi Varkiani, Xiaoming Xu, Nathaniel C. Lawson, Amir Hossein Nejat

School of Dentistry Faculty Publications

(1) Purpose: The aim of the present study was to compare the bond strength between two 3D-printed resins designed for long-term provisional crowns and three different reline materials. (2) Materials and Methods: Rectangular specimens were prepared from two 3D-printed resins (Envision Tech and NextDent C&B) and a conventional self-cure PMMA. Transparent tubes filled with three different reline materials including composite resin, Bis-acryl, and PMMA were bonded to the 3D-printed specimens (n = 11 per group, total of 6 study groups). Tubes filled with PMMA were bonded to the prepared PMMA specimens which served as the control group (n = 11, …

Comparison Of Two Different Intraoral Scanners For Determination Of Caries Related Volume Loss In Caries Removal, Merve Şeker, Elif Alkan, Dilek Tağtekin, Bora Korkut, Funda Yanıkoğlu

Journal of Dentistry Indonesia

Objective: The study aimed to compare cavity volume data obtained with two different intraoral scanners. Methods: One hundred extracted molar teeth were divided into groups according to ICDAS-II classification, and scanned with Cerec Omnicam (Dentsply Sirona) and iTero Element Flex (Align Technology). The caries-infected tissues were removed regarding either minimally invasive or conventional cavity principles. Samples were scanned again and volumetric data were assessed by Meshmixer 3.5 (Autodesk) 3D modeling software. Statistical evaluations were performed with Mann Whitney U test and Spearman’s Correlation test. The significance level was α=0.05. Results: Although there was a significant difference between obtained …

The Effects Of Boric Acid On The Water Solubility Of Glass Ionomer Cements, Banu Cukurluoz Bayındır, İrem Bağ

Journal of Dentistry Indonesia

Changing the water solubility property of glass ionomer cement (GIC), which is frequently used in pediatric dentistry, is the starting point of this study. Objective: To evaluate the effects of boric acid on the water solubility (WS) of GIC. Methods: The samples were prepared as n=12 in each of four groups: GIC-Conventional glass ionomer cement; BGIC with 1:3 boric acid added to conventional GIC powder; RMGIC-resin-modified glass ionomer cement; BRMGIC with 1:3 boric acid added to RMGIC powder. Weight changes were compared 1, 3 and 24 h after keeping in distilled water. One sample in each group was …