Dentistry Commons^™

Evaluation Of Porcelain To Metal Bond Strength On Use Of Recast Nickel-Chromium Alloy, Prakash Manne, Kavya Ravuri

Manipal Journal of Medical Sciences

Purpose: The objective is to assess how the bond between metal and ceramic is impacted by recasting the base metal alloy. Materials and Methods: A total of 78 metal-ceramic specimens were created using beryllium-free nickel-chromium alloy from Dentalloy International Pvt Ltd. There were 26 specimens in each of the three groups, and they were all prepared differently. The first group was cast from 100% fresh alloy and served as the control. The second group was made by mixing 50% used (once cast) alloy and 50% fresh alloy. The third group was cast using 100% reused (once-cast) alloy. All of the …

A High-Accuracy Detection System: Based On Transfer Learning For Apical Lesions On Periapical Radiograph, Yueh Chuo, Wen-Ming Lin, Tsung-Yi Chen, Mei-Ling Chan, Yu-Sung Chang, Yan-Ru Lin, Yuan-Jin Lin, Yu-Han Shao, Chiung-An Chen, Patricia Angela R. Abu

Department of Information Systems & Computer Science Faculty Publications

Apical Lesions, one of the most common oral diseases, can be effectively detected in daily dental examinations by a periapical radiograph (PA). In the current popular endodontic treatment, most dentists spend a lot of time manually marking the lesion area. In order to reduce the burden on dentists, this paper proposes a convolutional neural network (CNN)-based regional analysis model for spical lesions for periapical radiographs. In this study, the database was provided by dentists with more than three years of practical experience, meeting the criteria for clinical practical application. The contributions of this work are (1) an advanced adaptive threshold …

Revised Fdi Criteria For Evaluating Direct And Indirect Dental Restorations—Recommendations For Its Clinical Use, Interpretation, And Reporting, Reinhard Hickel, Sabine Mesinger, Niek Opdam, Bas Loomans, Roland Frankenberger, Milena Cadenaro, John Burgess, Arnd Peschke, Siegward D. Heintze, Jan Kühnisch

School of Dentistry Faculty Publications

Objectives: The FDI criteria for the evaluation of direct and indirect dental restorations were first published in 2007 and updated in 2010. Meanwhile, their scientific use increased steadily, but several questions from users justified some clarification and improvement of the living document. Materials and methods: An expert panel (N = 10) initiated the revision and consensus process that included a kick-off workshop and multiple online meetings by using the Delphi method. During and after each round of discussion, all opinions were collected, and the aggregated summary was presented to the experts aiming to adjust the wording of the criteria as …

Micro-Tensile Bond Strength Of Three Different Dual Cure Resin Composites Bonded To Dentin, Atya A. Alzarouq, Rabab Mehesen, Ashraf I. Ali

Mansoura Journal of Dentistry

Objective: To evaluate the micro-tensile bond strength (μTBS) and micro-morphological analysis of composite dentin interface of dual-cure resin composites bonded to dentin. Materials and Methods: For the micro-tensile bond strength test, sixty sound human maxillary and mandibular molars were collected. After embedding the selected molars in an acrylic resin block, the occlusal enamel and superficial dentin of each tooth were removed, exposing the mid-dentin area. They were assigned randomly into three groups (n=20) according to the restorative system. Then both groups were further divided into two subgroups; subgroup 1 for immediately tested specimens after 24 h (n=10), and subgroup 2 …

Evaluation Of Microtensile Bond Strength, Microleakage Pattern And Micromorphological Analysis Of New Functional Monomer-Based Universal Adhesive Tooth Interface, Hussain R. Khaled, Hamdi H. Hammama, Salah H. Mahmoud

Mansoura Journal of Dentistry

Objective: This study was intended to evaluate the micro tensile bond strength (μTBS), micro leakage pattern, and micro morphological analysis of new 10-MDP-based universal adhesive/tooth interface and compare it with other two 10-MDP-based adhesive systems before and after storage. Materials and Methods: Two Universal adhesives (Single Bond Universal Adhesive and Ambar Universal) and one all-in-one adhesive (CLEARFIL S3BOND) were used. A total of 102 permanent human molars were used in this study. The teeth were randomly divided into three groups (n=34) according to the type of used adhesive; Ambar Universal (AU), CLEARFIL S3BOND (CTS), and Single Bond Universal (SBU). Each …

Anti-Dysplastic Effect Of Nettle Extract And Its Nano-Formulation On 7,12-Dimethylbenz[A]Anthracene Induced Hamster Buccal Pouch Carcinogenesis, Samah K. Ezzat, Amira M. Elsherbini

Mansoura Journal of Dentistry

Objective: Oral squamous cell carcinoma (OSCC) is the most common malignancy in the oral cavity with no definitive cure. In this study, chitosan loaded with nettle was used for the treatment of 7,12-Dimethylbenz[a] anthracene (DMBA)-induced oral squamous cell carcinoma compared to regular chemotherapy with 5-Fluorouracil (5-FU).Material and methods: Sixty pathogen-free male Syrian golden hamsters were used. The control group served as a negative control with no intervention, while the remaining animals received DMBA for 16 weeks then they were divided equally into 5 groups as follows; DMBA group received no treatment, while the 5-FU group was treated with 15mg/kg of …

Immunohistochemical Assessment Of Angiogenesis And Cell Proliferation In Aggressive Versus Non-Aggressive Central Giant Cell Granuloma., Mena F. Mesiha, Mahmoud F. El Sherbeny, Sherif Y. El Nagdy

Mansoura Journal of Dentistry

Objective: The current study investigated the expression of MCM3 and CD31 in aggressive versus non-aggressive central giant cell granuloma (CGCG ) Materials and methods: Thirty-three paraffin blocks for CGCG cases were collected from Oral Pathology Departments, Faculty of Dentistry, Mansoura, and Alexandria Universities. The Immunohistochemical staining for CD31 and MCM 3 was performed, assessed, and scored. Results: Mean age of the studied cases was 35.6±9.1 years. The lesions that occurred in the mandible represented the majority of cases [27 cases (81.8%)]. The study revealed an association between aggressiveness and the presence of large swelling, pain, cortical perforation, root resorption, and …

Stem Cell Marker As A Factor For The Different Biological Behavior Of Ameloblastoma And Odontogenic Keratocyst, Hanan M. Sayed Ahmed, Doaa A. Esmaeil, Sherif Y. Elnagdy

Mansoura Journal of Dentistry

Objective: To investigate the immunohistochemical expression of SOX2 among the studied cases of ameloblastoma and odontogenic keratocyst in order to show if it correlates to the biological behavior of those odontogenic lesions. Materials and Methods: The study was carried out on 30 histo-pathologically confirmed cases of (15 ameloblastomas and 15 odontogenic keratocysts). These blocks were collected from archived files of the Department of Oral Pathology, Faculty of Dentistry, Mansoura University. Sections were subjected to Immunohistochemical staining by SOX2 according to a standard protocol. Results: OKCs showed higher expression of SOX2 than Ab in all epithelial layers not confined to the …

Clinicopathological Study Of Oral Plasma Cell Granuloma, Aya M. El-Bastawesi, Mona M. Ibrahim, Nadia A. El-Sissy

Mansoura Journal of Dentistry

Objective: To identify the characteristic clinical and Histopathologic features encountered in the oral lesions of PCG and thus, clarifying the variability nature of the studied oral plasma cell granulomas (OPCGS). Materials and Methods a sample of 25 retrospective paraffin blocks of the OPCGS were thoroughly investigated histopathologically. Results: the studied OPCG was mainly represented as a gingival swelling, there was a female tendency in most of the studied OPCGS (92%), ranging from 11-73 years with a mean of 42.40. the majority of the current OPCG (64%) did not express any bone changes. the OPCGS of the present work were characterized …

Immunohistochemical Expression Of Ezh2 In Mucoepidermoid Carcinoma Of Salivary Glands, Amira A. Mansour, Mona M. Ibrahim, Ahmed E. Ahmed, Azza A. El Sissi

Mansoura Journal of Dentistry

Objective: To disclose the variation in EZH2 expression among the different grades of MEC and to analyze the marker's immunohistochemical (IHC) expression in relation to the clinicopathologic data of all cases. Material and methods: The present study was conducted on 15 blocks diagnosed as MEC including equal numbers of different grades. These blocks were selected from the archives of the Oncology Center, Mansoura University. The specimens embedded in the retrieved paraffin blocks were all fixed in 10% formalin. Sections of 4 microns’ thickness intervals were serially cut and prepared for the EZH2 staining. Chi-square, Monte Carlo, and Fisher Exact tests …

Effect Of Food Simulating Solvents On Surface Roughness And Microhardness Of Bulk Fill Resin Composites., Hadeer M. Hal, Ashraf I. Ali, Noha A. El-Wassefy, Marmar A. Montaser

Mansoura Journal of Dentistry

Objectives: To evaluate the effect of food simulating solvents on surface roughness and microhardness of bulk fill resin composites in-vitro. Materials and methods: A total of 180 discs were made with (Filtek One bulk fill, REVEAL HD and x-tra fil bulk fill (n=60). The baseline data of surface roughness and microhardness measurements were recorded. Each group was divided into three subgroups, subgroup1 was immersed into methyl ethyl ketone (n=20), subgroup2 was immersed into ethanol (n=20) and, subgroup3 was immersed into artificial saliva (n=20) as control group. After 30 days, half of each subgroup was tested for surface roughness (n=10) by …

Mdpb-Containing Self-Etch Dental Adhesive: Antibacterial Activity And Effect Of Different Dentinal Surface Preparation, Sally N. Zaki, Ragy N. Saad, Hamdi H. Hamdan, Salah H. Mahmoud

Mansoura Journal of Dentistry

Objective: To evaluate the effect of MDBP-containing self-etch (SE) adhesive and different dentin surface pretreatments on antibacterial activity Materials and Methods: A total of forty disc shaped specimens fabricated (8 mm in diameter and 1.5 mm thickness) were divided into four main groups according to type of the surface treatment method; deionized water(control), CHX, Papin enzyme and Riboflavin. Each group was sub-divided into 2subgroups (n=5) according to the type of adhesive: classic or MDPB containing SE adhesives. Bonded specimens were stored in deionized water for 24 hr. (n=6). The plates contained dices shaped specimen was incubated at 37o C for …

Comparing Shaping Ability Of Fanta, Onecurve, And Protaper Next Ni-Ti Rotary Files Systems., Soliman N. Mansour, Maram Obeid, Tariq Yehia

Mansoura Journal of Dentistry

Objective: To compare the shaping ability of Fanta, One Curve, and Pro Taper Next Ni-Ti rotary file systems. Materials and Methods: Sixty Mandibular molars with mesiobuccal canals with curvatures ranging between 20° and 40° were divided into three groups of 20 teeth each. a group for each system as follows: group 1 was prepared by Fanta file system, group 2 was prepared by Pro Taper Next file system, and group 3 was prepared by One Curve file system. The measuring of canal curvatures was determined by Schneider's method using standardized periapical radiographs and the Image J software. Pre and post-CBCT …

Comparative Study Of Protrusive Record Accuracy With And Without George Gauge For Dentulous Cases, Aisha Z. Mostafa, Noha H. El-Shaheed

Mansoura Journal of Dentistry

Objective: This study aimed to evaluate the accuracy of the George gauge in protrusive records. Materials and Methods: This clinical trial includes a total of 12 dentulous subjects aged 20 to 40 years with no signs of muscular disease or temporomandibular joint disorders were chosen. For each patient, two different protrusive records were created, one with and one without the George gauge, using polyvinyl siloxane materials. The accuracy of these two protrusive records was evaluated by measuring the amount of midline shift in both records with a digital calliper. Then these Protrusive records were used to programme the articulator and …

Soft Metal Versus Laser Melting Metal Framework Used For Mandibular All On Four Implant Supported Fixed Complete Denture, Noha H. Rashed, Noha H. El Shaheed, Wael M. Said Ahmed, Salah A. Hegazy

Mansoura Journal of Dentistry

Objective: To radiographically evaluate the peri-implant bone height changes eri-implantin mandibular all on-four implant supported fixed complete denture (ISFCD) regarding metal framework fabrication technique either with milling from soft metal block or additive manufacturing using laser melting. Materials and Methods: Ten completely edentulous patients were rehabilitated with mandibular all on-four ISFCD. Computer-guided surgical procedures were followed for placement of implants. Patients were allocated randomly into two groups according to the framework fabrication technique. Group I frameworks were milled from soft metal block and group II frameworks were fabricated with additive manufacturing using laser melting. Vertical bone height changes around supporting …

Acute Invasive Fungal Rhinosinusitis Related Orbital Infection Secondary To Odontogenic Infection, Dennis Levy, Melvyn Yeoh

Oral Health Science Faculty Publications

A 64-year old male presented to our institution with painful ophthalmoplegia. The initial differential diagnosis included orbital apex disorders, such as orbital apex syndrome (OAS), cavernous sinus thrombosis (CST), and superior orbital fissure syndrome (SOFS). Ultimately, the diagnosis was acute invasive fungal rhinosinusitis (AIFRS) secondary to an odontogenic infection from carious teeth in the maxilla. Significant overlap exists between AIFRS and orbital apex disorders, making it prudent to include AIFRS in the differential diagnosis for painful ophthalmoplegia. The purpose of this review is to detail this specific patient's presentation and hospital course along with a brief review of AIFRS and …

Factors Influencing The Treatment Outcome Of Intentional Replantation On Teeth With Periapical Periodontitis: A Systematic Review And Meta-Analysis, Teng Kai Ong, Daniel Lim, Maharaj Singh, Alissa V. Fial

Library Faculty Research and Publications

Objectives

The purpose of this review was to appraise the quality of evidence of the existing publications on IR, and to perform a meta-analysis on the treatment outcomes of IR.

Methods

The specific PIO questions were as follows: Population: Patients with periapical periodontitis either before or after nonsurgical endodontic therapy. Intervention: IR performed with retrograde preparation and retrograde filling. Outcomes: the healing, treatment complications, and the factors influencing these outcomes after IR. Electronic and hand searches were performed in the Web of Science, PubMed, CINAHL, and Cochrane Library databases. Two authors independently screened the titles and abstracts for eligibility. The …

2022 Author/Title Index To The Journal Of The Michigan Dental Association, Jackie Hammond

The Journal of the Michigan Dental Association

The Journal of the Michigan Dental Association annually publishes an index of the year’s articles listed by title and author. This resource is intended to aid in content searches.

Staff Matters: What Will Be The Impact Of Changes To Michigan’S New Paid Sick Leave Law?, Jodi Schafer Sphr, Shrm-Scp

The Journal of the Michigan Dental Association

Michigan's paid sick leave law has seen several changes in recent years, and the latest updates, if upheld, will go into effect in February 2023. The original ballot-initiated law requires most employers to provide paid sick leave to employees. Employers need to be proactive in understanding the potential impact of these changes, including accrual rates, usage limits, notice requirements, and supporting documentation. It's crucial to review current leave policies and prepare for compliance if the law takes effect.

Resolving Echoes From Dentistry’S Past, Christopher J. Smiley Dds

The Journal of the Michigan Dental Association

This editorial discusses a 1939 concept of dental disease prevention and the resistance it faced from some in the dental profession due to potential economic self-interest. It draws parallels to current issues in the dental field, such as the Centers for Medicare & Medicaid Services (CMS) rules on dental coverage. The CMS rules link dental services to medical outcomes, opening the door for future expansion. However, the editorial highlights gaps in coverage, particularly for cancer patients and those with diabetes. The new CMS rule signifies progress in integrating oral health into healthcare, echoing a goal set in 1939.