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Articles 1 - 17 of 17
Full-Text Articles in Prosthodontics and Prosthodontology
In-Vitro Evaluation Of Accuracy Of Conventional And Cad/Cam Removable Partial Denture Frameworks, Pooya Soltanzadeh
In-Vitro Evaluation Of Accuracy Of Conventional And Cad/Cam Removable Partial Denture Frameworks, Pooya Soltanzadeh
Loma Linda University Electronic Theses, Dissertations & Projects
Purpose: Computer-aided design/computer-aided manufacturing (CAD/CAM) technology is gaining popularity in dentistry, and more recently, to fabricate removable partial dentures (RPD). The purpose of this study was 1) to evaluate the overall accuracy and fit of conventional versus CAD/CAM fabricated printed RPD frameworks based on STL data analysis, and 2) to evaluate the accuracy and fit of each component of the RPD framework. Materials and Methods: A maxillary metal framework was designed for a Kennedy class III modification I situation. The master model was scanned and used to compare the fit and accuracy of the RPD frameworks. A total of 40 …
The Wear Of Acrylic Resin And Composite Resin Teeth Against Polished And Glazed Zirconia, Abdulkareem Alshehri
The Wear Of Acrylic Resin And Composite Resin Teeth Against Polished And Glazed Zirconia, Abdulkareem Alshehri
Loma Linda University Electronic Theses, Dissertations & Projects
Background: Excessive wear for the occlusal surfaces of teeth results in decreased masticatory efficiency, poor esthetics and leads to reduced the occlusal vertical dimension which could lead to the development of temporomandibular disorders, consequently, further compromise function. Very few studies have been performed on the wear resistance of zirconia against artificial denture teeth and human enamel. Aim: The purpose of this study was to investigate the influence of polished zirconia (PZ) and glazed zirconia (GZ) on the 2-body wear resistance (vertical substance loss) of seven commercially available denture teeth made of different resins. Material and Method: Eight groups (n=10) of …
Design Of Parallel Robot For Dental Articulation And Its Optimization, Abulimiti Delimulati
Design Of Parallel Robot For Dental Articulation And Its Optimization, Abulimiti Delimulati
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
A dental articulator is a mechanical device used to simulate the relative position and motion between the upper and lower jaw when constructing and testing dental prostheses. Typically, it can be adjusted to approximate patient-specific jaw kinematics in order to analogue the static relationship and specific motions of a patient’s mandible to maxilla. However, the use of dental articulators is essentially a trial-and-error method in order to fine-tune fit and function of a dental prosthesis. Some of the most advanced current dental articulators can reproduce the position and the motion passively; furthermore, dentists need special training for measuring patients’ maxillofacial …
Managing Patient Expectations With Implant Treatment, Daniel B. Kamran, Mark Booth Dds, Eduardo Gonzalez Dds, Ed Shaw Dds
Managing Patient Expectations With Implant Treatment, Daniel B. Kamran, Mark Booth Dds, Eduardo Gonzalez Dds, Ed Shaw Dds
Excellence Day
This patient came to University of the Pacific, Arthur A. Dugoni School of Dentistry to get implants and implant crowns to improve his smile, replacing his upper partial denture. Different approaches were made by the faculty to arrive at best outcomes, which took four years for the patient to receive the treatment he wanted. This abstract will further detail how the treatment was conducted and the results afterwards.
Root Analogue Implant Creation: Establishing Procedures For The General Dentist, Alicia Hazdovac, Sarah Osborne, Gary D. Richards
Root Analogue Implant Creation: Establishing Procedures For The General Dentist, Alicia Hazdovac, Sarah Osborne, Gary D. Richards
Excellence Day
The possibility of replacing damaged teeth with custom-made root analogue implants was initially suggested around 1969 and reintroduced by Lungren et al. in 1992. The latter authors created custom implants in titanium and reported good osteointegration and aesthetic results. Following this effort there has been an increasing focus on custom root analogue implants as a replacement for ‘screw-type’ implants. Given the availability of software to manipulate 3D image data and the rapid rise of 3D printing technology, the question arises as to whether a general dentist can produce their own implants. Here we test the feasibility of practitioners producing custom …
Effect Of Emergence Profile Of A Single Implant Restoration On The Health Of Peri-Implant Soft Tissue, Waleed Nasir Asiri
Effect Of Emergence Profile Of A Single Implant Restoration On The Health Of Peri-Implant Soft Tissue, Waleed Nasir Asiri
Master's Theses (2009 -)
Purpose: The specific aims of this retrospective study were 1) to compare the emergence angle of a single implant crown (SIC) of the mandibular first molar to the emergence angle of the natural contralateral tooth, 2) to evaluate the effect of the emergence angle of SIC on the health of the peri-implant soft tissue and 3) to quantify an acceptable emergence angle among SIC. Materials and methods: Ten Marquette University School of Dentistry (MUSoD) patients were included in the study. Each patient was examined clinically and plaque index (PI), probing depth (PD), and bleeding on probing (BOP) measurements were gathered …
Effect Of Different Finish Line Designs On The Marginal And Internal Fit Of Metal Copings Made By Selective Laser Melting Technology, Adel Al Maaz
Master's Theses (2009 -)
Introduction: Marginal fit has been defined as the gap between the prepared tooth and the intaglio surface of the restoration. Internal gap is the perpendicular measurement from the internal surface of the casting to the axial wall of the preparation. Selective laser melting has been used for fabrication of metal copings such as Co-Cr base alloys and Au-Pt noble alloys. The purpose of this study was to determine the effect of different finish line designs on the marginal and internal fit of metal copings made from high noble, 25% noble and base alloys manufactured by SLM technology. Material and Methods: …
Short Length Versus Conventional Implants In Rehabilitation Of Completely Edentulous Mandible, Fardos N. Rizk, Engy Tallat, Mahmoud Elhomossany, Ahmed Lasheen Dr., Hebatalla Mahmoud
Short Length Versus Conventional Implants In Rehabilitation Of Completely Edentulous Mandible, Fardos N. Rizk, Engy Tallat, Mahmoud Elhomossany, Ahmed Lasheen Dr., Hebatalla Mahmoud
Dentistry
Various bone augmentation strategies have been proposed to overcome the anatomic and physiologic limitations of implant placement in patients with atrophic edentulous ridges. The use of short implants may provide an alternative treatment to avoid complications associated with alveolar bone augmentation. However, the clinical effectiveness of short implants versus long implants was not thoroughly investigated. Marginal bone height changes around short and conventional implants were evaluated in this study Methods: Fourteen completely edentulous male patients were selected and divided into two equal groups. Group (I) Patients received conventional complete maxillary dentures opposed by mandibular overdentures supported and retained by two …
Color Stability, Water Sorption And Water Solubility Of Various Artificial Acrylic Resin Teeth, Piyaporn Foungfu
Color Stability, Water Sorption And Water Solubility Of Various Artificial Acrylic Resin Teeth, Piyaporn Foungfu
Chulalongkorn University Theses and Dissertations (Chula ETD)
Color stability, water sorption and water solubility of the acrylic resin artificial teeth are the success keys to the appearance and mechanical properties of the denture teeth. The objective of the present study was to compare the color stability, water sorption and water solubility of 3 commercial artificial teeth: linear PMMA (NEW), resin composite (CPX) and cross-linked PMMA (ANT) and 1 color-liked heat-polymerized acrylic resin (MAJ). 80 colume-shaped specimens (9 mm/ 2 mm thickness) were fabricated for color stability test using a spectrophotometer after immersing in water or coffee solution at 1, 7, 28, 56 and 84 days. 40 colume-shape …
Effect Of Different Polishing Systems, Forces, And Durations On Surface Roughness And Phase Transformation Of Monolithic Zirconia, Songsak Munkongsujarit
Effect Of Different Polishing Systems, Forces, And Durations On Surface Roughness And Phase Transformation Of Monolithic Zirconia, Songsak Munkongsujarit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to determine the effect of polishing systems, forces and durations on the surface roughness and phase transformation of zirconia. 72 pieces of fully sintered zirconia size 7 x 5 x 4 mm were fabricated with CAD/CAM, then divided into nine groups depending on the polishing systems and forces. All specimens were ground with fine diamond bur as the control, and initial surface roughness (Ra) was measured. The samples were then polished with one of the zirconia polishing systems (Diazircon or Komet ZR) or porcelain polishing system (Ceramaster), with forces at 1, 2 and 3 newtons. The polishing …
Gene Expression Of Bcl2a1 และ Cxcl9 In Soft Tissue Covering Bone Grafting Materials, Borwonluk Taveedach
Gene Expression Of Bcl2a1 และ Cxcl9 In Soft Tissue Covering Bone Grafting Materials, Borwonluk Taveedach
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study was to assess the expression of Bcl2a1 and Cxcl9 genes in soft tissues covering bone grafted with demineralized freeze-dried bone allograft (DFDBA) and deproteinized bovine bone mineral (DBBM) in comparison with ones covering without grafting. The animals were randomly separated into three groups of treatment. Calvarial defect models were created on parietal bones. Bare defect models without bone graft as a control group. After one and three months, animals were sacrificed. Soft tissues covering the defected area were collected by punch technique. RNA was isolated and proceeded to Real-time reverse transcription quantitative polymerase chain reaction (RT-qPCR). Statistical analysis …
Fracture Resistance Of Non-Ferruled Endodontically Treated Teeth Restored With Different Fiber Post And Core Methods After Five Years Fatigue Loading, Puriwat Malakorn
Fracture Resistance Of Non-Ferruled Endodontically Treated Teeth Restored With Different Fiber Post And Core Methods After Five Years Fatigue Loading, Puriwat Malakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The aim of this study was to compare the fracture resistance and failure mode of non-ferruled ETT restored with different fiber post and core methods after five years in vitro fatigue loading. Forty-eight uniradicular lower first premolar teeth were decoronated, endodontically treated and prepared for the post space. The prepared specimens were divided into four groups (n=12): single fiber-reinforced composite (FRC) post and flowable resin composite core (Group I), FRC post with an accessory fiber post and flowable resin composite core (Group II), resin composite relined FRC post and resin composite core (Direct anatomic post)(Group III), and resin composite relined …
Effect Of Methyl Formate-Methyl Acetate Treatment On Flexural Strength Between Denture Base And Self-Cured Hard Reline Materials, Mongkol Puangpetch
Effect Of Methyl Formate-Methyl Acetate Treatment On Flexural Strength Between Denture Base And Self-Cured Hard Reline Materials, Mongkol Puangpetch
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purpose of this study was to evaluate the effect of methyl formate-methyl acetate (MF-MA) surface treatment on the flexural strength between denture base and hard reline materials. 180 heat-cured acrylic denture base (Meliodent®) specimens were prepared according to ISO 20795-1 (2013) and divided into 18 groups with various autopolymerizing hard reline materials. Group I-III: relined with Unifast Trad®, Group IV-VI: relined with Kooliner® Group VII-IX: relined with Tokuyama® Rebase II Fast (without adhesive, with hardener), Group X-XII: relined with Tokuyama® Rebase II Fast (with adhesive and hardener), Group XIII-XV: relined with Tokuyama® Rebase II Fast (without adhesive and hardener), …
Effect Of Citric Acid On Color Stability And Surface Roughness Of Translucent Monolithic Zirconia With Different Staining Techniques, Panisa Rinthong
Effect Of Citric Acid On Color Stability And Surface Roughness Of Translucent Monolithic Zirconia With Different Staining Techniques, Panisa Rinthong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background and rationale: Translucent monolithic zirconia is developed to solve the problem of esthetic in the conventional generation of zirconia with high opacity. When these materials are used for anterior restoration in the oral cavity, they can contact with foods and beverages that are acidic, which may affect the color stability and surface roughness of the material at different levels. Objective: The objective of this study was to determine the effects of citric acid on color stability and surface roughness of translucent monolithic zirconia with different staining techniques. Materials and Methods: A total of 80 disc specimens of VITA YZ® …
Comparison Of The Efficacy Of Chemical Cleaning Methods In Removing Candida Albicans From Polymethyl Methacrylate, Thanaporn Thanamee
Comparison Of The Efficacy Of Chemical Cleaning Methods In Removing Candida Albicans From Polymethyl Methacrylate, Thanaporn Thanamee
Chulalongkorn University Theses and Dissertations (Chula ETD)
The proper denture hygiene is important to reduce the risk of denture stomatitis. Mechanical cleaning is not sufficient to remove the dental plaque from acrylic denture base, accordingly chemical cleaning is needed. The purpose of this study was to compare the efficacy of chemical cleaning methods in removing Candida albicans from polymethyl methacrylate (PMMA) by comparing the remaining viable cells after cleaning. The total of 120 specimens were prepared. Candida albicans was cultured in broth to log phase. All specimens were randomly placed in 24-well tissue culture plate with 1 ml of Candida albicans cultured for biofilm formation at 37 …
Effect Of Various Curing Conditions In Pressure Cooker On Flexural Strength Of Denture Hard Relining Materials, Thassanee Suwannachote
Effect Of Various Curing Conditions In Pressure Cooker On Flexural Strength Of Denture Hard Relining Materials, Thassanee Suwannachote
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study evaluated the effect of various curing conditions in pressure cooker on flexural strength of hard chairside reline resins (UnifastTM Trad, Tokuyama® Rebase II Fast with and without Hardener®). For each material, 70 specimens were prepared and divided into 7 groups consists of control group and 6 experimental groups: cured in 2 bars air or nitrogen pressure cooker at 55ºC for 10, 15 and 20 min respectively. For Hardener® groups, specimens were soaked in Hardener® for 3 min after curing. The flexural strength was tested using a Universal testing machine. The data were analyzed using Three-way ANOVA, One-way ANOVA …
ผลของกาวติดฟันเทียมต่อประสิทธิภาพการบดเคี้ยวและแรงบดเคี้ยวสูงสุดในผู้ป่วยที่ใส่ฟันเทียมทั้งปาก, หยาดฝน พลศรี
ผลของกาวติดฟันเทียมต่อประสิทธิภาพการบดเคี้ยวและแรงบดเคี้ยวสูงสุดในผู้ป่วยที่ใส่ฟันเทียมทั้งปาก, หยาดฝน พลศรี
Chulalongkorn University Theses and Dissertations (Chula ETD)
วัตถุประสงค์เพื่อศึกษาผลของกาวติดฟันเทียมต่อประสิทธิภาพการบดเคี้ยว (masticatory performance) และแรงบดเคี้ยวสูงสุด (maximum occlusal force) ของผู้ป่วยฟันเทียมทั้งปาก ผู้ป่วยสันเหงือกว่างที่ใส่ฟันเทียมทั้งปากบนและล่างจำนวน 65 คน อายุเฉลี่ย 68.9±7.2 ปี เป็นเพศชาย 39 คน เพศหญิง 26 คน มีคุณภาพฟันเทียมอยู่ในระดับที่ยอมรับได้ (กลุ่ม A) และยอมรับไม่ได้ (กลุ่ม UA) จำนวน 44 และ 21 คน ตามลำดับ มีลักษณะของเนื้อเยื่อรองรับฟันเทียมตามระบบของ American College of Prosthodontists กลุ่ม I, II, III และ IV จำนวน 19 30 11 และ 5 คนตามลำดับ ผู้ป่วยเข้ารับการทดสอบประสิทธิภาพการบดเคี้ยวด้วยการเคี้ยวถั่วลิสงจำนวน 20 รอบวงเคี้ยว ถั่วลิสงที่ผ่านการเคี้ยวแล้วจะถูกร่อนผ่านเครื่องสั่น ด้วยตะแกรงทดสอบมาตรฐานจำนวน 12 ชั้น เพื่อวิเคราะห์หาขนาดอนุภาคกลางของถั่วลิสง (median particle size) และเข้ารับการทดสอบแรงบดเคี้ยวสูงสุดด้วยการกัดแผ่นฟิล์มที่อ่อนไหวต่อความดัน (pressure sensitive film) โดยวางแผ่นฟิล์มระหว่างด้านบดเคี้ยวของฟันเทียมบนและล่างในตำแหน่งสบสนิทที่สุด (maximum intercuspal position) วิเคราะห์และแปรผลด้วยโปรแกรมสถิติสำเร็จรูป เพื่อเปรียบเทียบประสิทธิภาพการบดเคี้ยวและแรงบดเคี้ยวสูงสุดระหว่างก่อน (T1) และหลังการใช้กาวติดฟันเทียมอย่างต่อเนื่องเป็นระยะเวลา 1 เดือน (T2) สถิติที่ใช้ในการทดสอบคือ paired t-test ที่ระดับความเชื่อมั่นร้อยละ 95 ผลการศึกษาพบว่าเมื่อเปรียบเทียบก่อนและหลังการใช้กาวติดฟันเทียม ประสิทธิภาพการบดเคี้ยวเพิ่มขึ้นอย่างมีนัยสำคัญในกลุ่ม A (P = 0.035) แต่ไม่มีความแตกต่างอย่างมีนัยสำคัญทางสถิตในกลุ่ม UA (P = 0.313) แรงบดเคี้ยวสูงสุดลดลงอย่างมีนัยสำคัญในกลุ่ม A (P = 0.020) แต่ไม่มีความแตกต่างอย่างมีนัยสำคัญทางสถิติในกลุ่ม UA (P …