Prosthodontics and Prosthodontology Commons^™

Accuracy And Surface Roughness Of Co-Cr Partial Denture Frameworks With Different Digital Fabrication Methods, Islam Heiba

Dentistry

Statement of problem. Traditional removable partial denture (RPD) manufacture is being phased out in favor of computer-aided design and computer-aided manufacturing (CAD-CAM) techniques and rapid prototyping (RP), which provide more efficient methods of producing RPD frameworks. However, studies comparing the accuracy and surface roughness of these approaches on RPD frameworks are still scarce. Purpose. The purpose of this in vitro study was to evaluate the accuracy and surface roughness of class I cobalt chromium (Co-Cr) removable partial denture frameworks digitally constructed using 2 different CAD-CAM technologies: direct milling (DM) and selective laser melting (SLM). Material and methods. An educational maxillary …

The Effect Of Die Material On The Crown Fracture Strength Of Zirconia Crowns, Akram Sayed Ahmed, Nathaniel C. Lawson, Chin-Chuan Fu, Pranit V. Bora, Edwin Kee, Amir H. Nejat

School of Dentistry Faculty Publications

BACKGROUND: Determination of the eligibility of several tooth analog materials for use in crown fracture testing. METHODS: A standardized premolar crown preparation was replicated into three types of resin dies (C&B, low modulus 3D printed resin; OnX, high modulus 3D printed resin composite; and highest modulus milled resin composite). 0.8 mm zirconia crowns were bonded to the dies and the maximum fracture load of the crowns was tested. Twelve extracted human premolars were prepared to a standardized crown preparation, and duplicate dies of the prepared teeth were 3D printed out of C&B. Zirconia crowns were bonded to both the dies …

Alginate Dressings- Revisiting The Past, Oshine Jha, Oshine Jha

Annual Research Symposium

Wound healing in simple terms is the healing of skin which involves various mechanisms. It is not dressings themselves that heal wounds, but the careful selection of appropriate dressings that provide the optimal wound-healing environment for the individual wound. Wound dressings are prepared from biopolymers, synthetic polymers and biomaterials.

Clinical, Radiographic And Biochemical Evaluation Of One-Piece Vs Two-Piece Single Implants After 5 Years Of Functional Loading, Ippolito Caputo

Annual Research Symposium

The aim of this study was to compare the clinical and radiographic conditions and the expression of proinflammatory cytokines in peri-implant crevicular fluid (PICF) of two-piece/bone level (TP/BL) versus one-piece/tissue level (OP/TL) single implants with a laser-microgrooved collar after at least 5 years of functional loading.

Influence Of Intraradicular Restoration Technique On The Biomechanical Behavior Of Upper Canines, Ana Paula Gomes

Annual Research Symposium

This study assessed the stress distribution in endodontically treated upper canines subjected to the cementation of two types of intraradicular retainers.

Influence Of Abutments Surface (Machined Vs. Laser-Microgrooved) In Soft-Tissue Response During One Year Of Function: Clinical And Biochemical Outcomes Of A Rct With Split-Mouth Design, Elisa Maccari

Annual Research Symposium

To evaluate peri-implant soft tissue behaviour around machined vs laser-microgrooved implants/healing/prosthetic abutments during 1 year of function by assessing IL-6, IL-1b and MMP-8 levels in peri-implant crevicular fluid (PICF).

Silver Nano Particle Or Sodium Hypochlorite A Better Denture Cleanser, Dr.Tessa Kuriachan, Dr.Rahul Senan, Dr. Parvathy B, Dr. Keerthi Pt

Annual Research Symposium

Denture hygiene is compromised both due to the limitations of the denture base material as well as the lack of manual dexterity of denture wearers. Moreover, the rough tissue surface of the dentures affect the initial formation of candidal biofilms probably because it provides a greater surface area and protected sites for colonization. Among the various methods available to disinfect dentures, chemical method using Sodium hypochlorite seems to be the most effective one. Even though sodium hypochlorite is an effective denture cleanser,it has many disadvantages like the increased roughness of the denture surface and decreased colour stability. So a better …

Dentofacial Effects Of Radiotherapy On Pediatric Population With Retinoblastoma, Kristi Truong

Annual Research Symposium

This literature review investigates the dentofacial consequences of radiotherapy in young patients with retinoblastoma by referencing current research. In addition, the management and rehabilitation of the dentofacial abnormalities, highlighting orthodontic, surgical, and prosthetic approaches, is examined. By understanding the changes of dentofacial development due to retinoblastoma treatment, effective management techniques can be implemented to resolve significant issues, relating to dental and skeletal relationship and facial appearance.

Rapid Direct Wax Up For Provisional Crown Fabrication, Debra A. Woo Dds, Ma, Chi Tran

Pacific Journal of Health

While there are numerous choices for provisionalization, this technique is advantageous when a patient presents with an immediate need for temporization and there is limited time in the schedule for both the patient and provider. Providing an efficient solution using readily available materials that address the esthetics, function and reduction of sensitivity until the patient can be appointed for definitive treatment is illustrated.

The Use Of Tissue Grafts Associated With Immediate Implant Placement To Achieve Better Peri-Implant Stability And Efficacy: A Systematic Review And Meta-Analysis, Enrico Maria Rondone, Bruno Leitão-Almeida, Miguel Silva Pereira, Gustavo Fernandes, Tiago Borges

MOSDOH Faculty Publications

Background: The goal of this systematic study and meta-analysis was to evaluate the efficacy of hard and/or soft tissue grafts associated with type-1 implants on healing and treatment outcomes. The primary outcomes studied were implant survival rate, pocket depth, marginal periimplant recession, bone loss, bone thickness (volumetric change), interproximal bone level, mesial and distal papilla migration, and radiographic evaluation; and the secondary parameters were Pink Esthetic Score (PES), vertical distance from implant shoulder and bone, Visual Analogue Score (VAS), Implant Stability Quotient (ISQ), and biological complications (fistulas, pain, mucositis, and peri-implantitis). Methods: The PICO strategy was used to formulate the …

Fibroblasts And Osteoblasts Behavior After Contact With Different Titanium Surfaces Used As Implant Abutment: An In Vitro Experimental Study, Jose Henrique Cavalcanti De Lima, Patricia Cristina Matos Robbs, Elena Mavropoulos Oliveira Tude, Piedad N. De Aza, Eleani Maria Da Costa, Antonio Scarano, Juan Carlos Prados-Frutos, Gustavo Fernandes, Sergio Alexandre Gehrke

MOSDOH Faculty Publications

Background: The goal of this in vitro study was to compare three different surfaces: two types of implant surfaces commercially available ([a] smooth/machined and [b] acid-treated surface) versus (c) anodized surface. Discs were manufactured with commercially pure titanium (CP) grade IV, which were subsequently analyzed by scanning microscopy and fibroblastic and osteoblastic cell cultures. Methods: Ninety-nine discs (5 × 2 mm) were manufactured in titanium grade IV and received different surface treatments: (i) Mach group: machined; (ii) AA group: double acid etch; and (iii) AN group: anodizing treatment. Three discs from each group were analyzed by Scanning Electron Microscopy (SEM) …

Build Angle Effect On 3d-Printed Dental Crowns Marginal Fit Using Digital Light- Processing And Stereo-Lithography Technology: An In Vitro Study, Omar Elsergany

Dentistry

Background The effect of 3D printing technology and build angle on the marginal fit of printed crowns is unclear. The objective of this research was to use digital light processing (DLP) and stereo-lithography (SLA)-based 3D printing to construct single restorations with varied build angles and to analyze the crowns′ marginal fit.

Methods A prepared resin first molar was scanned utilizing an optical scanner. Three build orientations were used to construct the specimens: 0, 45, and 90o. DLP and SLA technology were used to produce the casting patterns. A digital microscope was used to measure the marginal gaps. The effect of …

Minimally Invasive Periodontal Regeneration With The Buccal Approach: A Systematic Review And Meta-Analysis Of Clinical Studies, Elisa Pasqualini, Filipe Castro, Denise Curado, Ana Martelete, Artak Heboyan, Muhammad H. Saleh, Juliana Campos Hasse Fernandes, Gustavo Fernandes

MOSDOH Faculty Publications

OBJECTIVE: The aim of this study was to investigate clinical periodontal parameters after treatment using the Minimally Invasive Surgical Technique (MIST), Modified Minimally Invasive Surgical Technique (M-MIST), and/or any technique for papilla preservation, such as Entire Papilla Preservation (EPP), modified-papilla preservation technique (M-PPT), or simplified-papilla preservation technique (SPPT). METHODS: The focus question was “For patients with periodontal intrabony defects (P), what is the best minimally invasive regenerative approach (I), comparing MIST, M-MIST, and papilla preservation techniques’ outcomes (C) to improve PD, CAL, GR, and periodontal stability (O)?” An online search was conducted on PubMed, Cochrane Library, and Embase. Only randomized …

Is The Facial Bone Wall Critical To Achieving Esthetic Outcomes In Immediate Implant Placement With Immediate Restoration? A Systematic Review, Sergio Charifker Ribeiro Martins, Marcio Da Costa Marques, Michael Gomes Vidal, Pedro Henrique Moreira Paulo Tolentino, Roberto Galvão Dinelli, Gustavo Fernandes, Jamil Awad Shibli

MOSDOH Faculty Publications

Background. Rehabilitation in the anterior region requires specific conditions for success, such as the presence of papilla, emergence profile, and balance between pink and white esthetic. Objectives. This systematic review aimed to evaluate the esthetic risk associated with immediate implant placement with immediate restoration in the anterior superior area, where the facial bone plate may be absent or deficient. Materials and methods. The search was done in PubMed, Embase, Cochrane, Lilacs, Scopus, Scielo, and Google Scholar databases. The investigation involved clinical studies and observational studies published between January 2012 and July 2023. Studies were excluded if there was less than …

Critical-Size Defects Reconstruction With Four Different Bone Grafts Associated With E-Ptfe Membrane: A Histomorphometric Experimental In Vivo Study, Gustavo Fernandes, Filipe Castro, Rafael Martins Pereira, Wendel Teixeira, Sergio Gehrke, Julio Cesar Joly, Juan Blanco Carrion, Juliana Campos Hasse Fernandes

MOSDOH Faculty Publications

Objectives: The goal of this study was to assess the newly formed bone and the remnant biomaterial by comparing four different bone grafts used to treat critical-size defects, associated or not with the non-resorbable membrane.

Materials and methods: Two calvaria critical-size bone defects were created in 50 male Wistar rats. They were divided into blood (G1), autogenous (G2), bioglass (G3), hydroxyapatite (G4), and xenograft (G5) groups, associated or not with e-PTFE. The experimental periods were 15 and 45 days. Sections were prepared for histomorphometric assessment. All data were analyzed by the mixed-effects model with multiple comparisons (significance level, p < .05).

Results: …

Effect Of Different Implant Materials On Stresses Transmitted To Peri-Implant Areas Of Implant-Retained Mandibular Overdenture, Diaa Mohamed Zahran Future University In Egypt, [email protected], Aya Fawzy Associate Professor Of Prosthodontics, Future University In Egypt, [email protected], Salah Hegazy Professor Of Prosthodontics, Faculty Of Dentistry, Mansoura University, [email protected], Sara M. Shabaan Lecturer At Removable Prosthodontic Department, Faculty Of Oral And Dental Medicine , Badr University, Cairo, Egypt, Ahmed A.Elwahed Shaaban Associate Professor Of Prosthodontics, Future University In Egypt, [email protected]

Future Dental Journal

Aim this in vitro study was conducted to evaluate the effect of mechanical loading on different implant materials on supporting structures materials and methods: a total of three implant retained overdentures were used in this study, retained by two implants each (Titanium, polyetheretherketon and zirconia) were placed in epoxy resin casts at the canine area using a surgical guide. Soft liner material was used at the distal extension area to mimic the soft tissues. Two linear strain gauges were bonded buccal and lingual to each implant to measure the peri-implant strains during unilateral and bilateral loading. Results: during bilateral loading …

Effect Of Scan Body Design On The Accuracy Of The Implant Position In Implant Supported Prosthesis, Ahmed Safwat Elghazally ,Future University In Egypt, [email protected], Bassem Mohsen Associate Professor Of Prosthodontics, Future University In Egypt, [email protected], Amr Hosny Professor Of Prosthodontics, Faculty Of Dentistry – Cairo University In Egypt, [email protected], Hussien G. Elcharkawi Professor Of Prosthodontics, Future University In Egypt, [email protected]

Future Dental Journal

Background: Several treatment options are planned for completely edentulous patients rehabilitation which were developed to meet patients desires and requirements, starting from conventional complete denture till implant supported fixed full arch cases. Each technique has its own indication and limitations. Passive fit is an important factor for the long-term success of implant- prosthesis, which necessitate accurate transfer of the implant position. Recently, digital impressions have been introduced in dental implant treatment. By the use of scan body and different optical scanning methods, the position of scan bodies can be transferred to a virtual implant position within the dental arch. Material …

Effect Of Different Surface Characterizations On Color Stability And Surface Roughness Of Provisional Materials After Toothbrushing, Sarasinee Sattawatthamrong

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to evaluate the surface roughness of 5 provisional materials with different surface characterization methods after simulating 1 year of toothbrushing. Specimens were fabricated from autopolymerized polymethyl methacrylate (UNIFAST Trad), autopolymerized bis-acryl composite resin (Protemp 4), light-activated composite resin (REVOTEK LC), milled polymethyl methacrylate block (DD provi P HI), and 3-dimensionally printed methacrylate oligomer (Nextdent C&B MFH). Each material was divided into 3 groups: polishing, application of Lite Art and Resin Glaze, and application of OPTIGLAZE color. After 5,000 and 10,000 toothbrushing cycles, surface roughness was measured. A 3-way repeated measures ANOVA was conducted to analyze the effects …

The Effect Of Cement Thickness On Shear Bond Strength Of Zirconia With Three Different Self-Adhesive Resin Cements, Thofun Ieamsuwantada

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This study aimed to evaluate the influence of resin cement thickness on the shear bond strength (SBS) to zirconia using different self-adhesive resin cements (SAC). Materials and Methods: One hundred twenty irconia specimens were prepared, air abraded with 50 μm aluminium oxide particles and divided into 12 groups (n  = 10), according to the cement thickness (50, 100, 150, and 200 μm) and SAC (RelyXTM U200, PANAVIATM SA LUTING Multi, MaxcemTM Elite Chroma). The specimens were cemented to resin composite blocks with SAC, stored in water at 37°C for 24 hours and subjected to the SBS test. Mode of …

Effect Of Chairside Silicone Polishing Systems On The Surface Roughness Of Cad/Cam Milled And Conventional Denture Base Materials, Sarita Apiromwijit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Purpose: The objective of this study was to evaluate the effect of two commercial chairside polishing systems compared with conventional laboratory polishing on the surface roughness of two types of denture base materials. Methods: Square-shaped specimens (8x8x5 mm) were fabricated from CAD/CAM milled and heat-polymerized denture base materials. Each specimen was ground with tungsten carbide and then divided into three groups according to polishing techniques(n=8): Exa technique, AcryPoint, and conventional laboratory polishing. The roughness (Ra) values were measured using a non-contact profilometer after finishing with tungsten carbide bur, every 30 seconds with each subsequent polisher (rough, medium, and fine) of …