Dentistry Commons^™

Comparison Of Early Stability Betweenaggressive And Non-Aggressive Thread Design Implant, Pawida Pataraprasit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background and objective A new type of implant with aggressive threads, called the BLX implant, has been designed to provide greater adhesion to the bone. This study investigates the early implant stability between aggressive (BLX) and non-aggressive (BL) thread implants using Implant Stability Quotient (ISQ) values and Implant stability test (IST) values.) Method BLX and BL implants were placed by block randomization (12 BLX implants, 10 BL implants) following the manufacturer protocol. The insertion torque was recorded. The Implant Stability Quotient (ISQ) values were measured immediately after placement and 6 weeks after implant placement while the Implant stability test (IST) …

Two-Body Wear Resistance Of Four Different Lithium Disilicate, One Zirconia Reinforced Lithium Silicate, And Two Zirconia Cad/Cam Materials, Suchaya Tantrachoti

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: to evaluate the volume loss of four different lithium disilicate, one zirconia reinforced lithium silicate, and two zirconia CAD/CAM materials. Methodology: The test conditions were divided into 8 experimental groups (n=6); Amber mill (AM), milled-Celtra Duo (mCD), fired-Celtra Duo (fCD), IPS emax CAD (EM), n!ce (NI), Rosetta SM (RS), Cercon xt (XT), and IPS emax ZirCAD (ZC). Flat square specimens (8 x8 x4 mm3) were prepared. A spherical steatite (D =6mm) was used as an antagonist. The simulated two-body wear was performed using a chewing simulator (120,000 cycles, 50 N, 1.34 Hz, sliding movement 0.5 mm). The volume loss …

Effectiveness Of Myofunctional Therapy With Frenectomy In Adult Patients With Obstructive Sleep Apnea And Ankyloglossia, Chanadda Preedeewong

Chulalongkorn University Theses and Dissertations (Chula ETD)

In recent years, myofunctional therapy has emerged as a noninvasive treatment modality for patients suffering from obstructive sleep apnea (OSA), owing to its lower cost and reduced risk of serious side effects compared to other therapeutic options. Furthermore, myofunctional therapy may be considered for patients who cannot tolerate continuous positive airway pressure (CPAP) or oral appliances. However, ankyloglossia, a congenital condition characterized by restricted tongue movement, has been shown to limit the exercise regimen and compromise the effectiveness of myofunctional therapy. This study aims to explore the effectiveness of myofunctional therapy combined with frenectomy for adult OSA patients with ankyloglossia. …

ความรู้และทัศนคติของทันตแพทย์ในประเทศไทย เกี่ยวกับภาวะหยุดหายใจขณะหลับจากการอุดกั้น, ทิพย์จุฑา บูรณกิจวิสูตร

Chulalongkorn University Theses and Dissertations (Chula ETD)

การศึกษานี้จึงมีวัตถุประสงค์เพื่อศึกษาระดับความรู้และทัศนคติต่อภาวะหยุดหายใจขณะหลับจากการอุดกั้นของทันตแพทย์ในประเทศไทยจำนวน 494 คน ระหว่างเดือนกรกฎาคมถึงกันยายน พ.ศ.2565 โดยใช้แบบสอบถามออนไลน์ประกอบด้วย 3 ส่วนได้แก่ ข้อมูลทั่วไป ความรู้ และทัศนคติ ผลการศึกษาพบว่าทันตแพทย์มีระดับความรู้น้อย จำนวน 275 คน (ร้อยละ 56.9) เกี่ยวกับคำจำกัดความของโรค พยาธิสรีรวิทยา การวินิจฉัยและการรักษา และผลคะแนนความรู้มีความแตกต่างอย่างมีนัยสำคัญทางสถิติที่ระดับความเชื่อมั่นร้อยละ 95 ของคะแนนความรู้ระหว่างทันตแพทย์ที่เคยฝึกอบรมและไม่เคยฝึกอบรมเกี่ยวกับภาวะหยุดหายใจขณะหลับจากการอุดกั้น ทั้งในและนอกระบบมหาวิทยาลัยทันตแพทยศาสตร์บัณฑิต และระหว่างทันตแพทย์ที่เคยมีประสบการณ์และไม่เคยมีประสบการณ์ในการตรวจคัดกรองผู้ป่วยที่มีภาวะหยุดหายใจขณะหลับจากการอุดกั้น แต่พบว่าทันตแพทย์ผู้ร่วมวิจัยส่วนใหญ่มีทัศนคติเชิงบวกต่อความสำคัญว่าภาวะหยุดหายใจขณะหลับจากการอุดกั้นอาจคุกคามถึงชีวิต และมีความมั่นใจในการตรวจคัดกรองและให้การจัดการภาวะหยุดหายใจขณะหลับจากการอุดกั้น โดยจำนวนร้อยละ 76 เห็นด้วยอย่างยิ่งว่าภาวะหยุดหายใจขณะหลับจากการอุดกั้นเป็นโรคที่มีความสำคัญเพราะอาจคุกคามถึงชีวิตได้ สรุปว่าทันตแพทย์ไทยยังมีระดับความรู้น้อยแต่มีทัศนคติที่ดีต่อภาวะหยุดหายใจขณะหลับจากการอุดกั้น บ่งชี้ให้เห็นว่าทันตแพทย์เห็นคุณค่า รวมถึงให้ความสำคัญและเต็มใจที่จะเรียนรู้เกี่ยวกับภาวะหยุดหายใจขณะหลับจากการอุดกั้น

Micro-Computed Tomography Analysis Of Bone Regeneration Using Mrna Encoding Bone Morphogenetic Protein-2 With Implant Placement In Rat Femur, Nopparada Lawtrakulngam

Chulalongkorn University Theses and Dissertations (Chula ETD)

Bone morphogenetic protein-2 (BMP-2) has a potential for enhancing bone regeneration and osseointegration around implant materials. However, the drawback of rhBMP-2 protein delivery is instability. Therefore, high doses of rhBMP-2 need to be used clinically, which results in higher costs and more side effects. Although gene-based therapy, can overcome these limitations. Recent clinical studies on BMP-2 mRNA regarding bone regeneration around implant materials are lacking. This study aims to investigate the differences in bone regeneration after implant placement with or without mRNA encoding BMP-2 (m1ᴪ-BMP-2 mRNA) in micro-computed tomography analysis after implant placement in rat femur defects. Forty implant titanium …

Human Epidermal Growth Factor Release From Hyaluronic Acid-Based Platforms Towards In Vitro Expansion Of Salivary Gland Cells, Toan Phan Van

Chulalongkorn University Theses and Dissertations (Chula ETD)

Off-the-shelf recombinant growth factors are increasingly used as signaling cues to optimize organoid biofabrication and shorten the in vitro culture time. These factors are mainly produced in prokaryotic systems but lack post-translational modifications. To overcome such limitations and the high production costs related to these common systems, plant molecular farming is a novel, easy adaptable and feasible alternative. Epidermal growth factor (EGF) is a known signaling cue essential for epithelial organogenesis and organoid biofabrication particularly in exocrine glands. This study aims to develop an EGF delivery in vitro platform with Nicotiana benthamiana plant-derived EGF (P-EGF) encapsulated on hyaluronic acid/alginate (HA/Alg) …

Accuracy Assessment Of 3d Tooth Reconstruction With Novel Segmentation Technique, Thanatchaporn Permwatanachai

Chulalongkorn University Theses and Dissertations (Chula ETD)

In modern medicine, three-dimensional (3D) reconstruction has innovative new applications by building cost-effective patient-specific surgical models and prostheses. Concurrently, 3D reconstruction is useful in dental and maxillofacial disciplines for pre-operative planning and surgical simulation. During the 3D reconstruction process, one of the significant procedures is segmentation, which involves extracting interesting structures from undesirable surroundings. In this case, if the digital segmentation is inaccurate, the physical model generated by the virtual model will not properly represent anatomy of the structure, resulting in a discordance between treatment plan and outcome. The study aims to assess the segmental accuracy of the new threshold-based …

Factors Associated With Success Rate Of Alveolar Bone Graft For Dental Implant Rehabilitation: An Up To 10-Years Retrospective Study, Kaung Zaw Win

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Nowadays, rehabilitating edentulous areas using dental implants has become a reliable treatment choice. However, insufficient bone volume is the most common clinical problem in dental implant rehabilitation, indicating the requirement of reconstructive bone surgeries to increase bone availability. Objective: To identify the factors that potentially associate with success in alveolar bone graft surgery for dental implant rehabilitation, along with the bone graft success rate for dental implant rehabilitation, implant survival rate and marginal bone loss (MBL) around implants Materials and methods: Treatment outcomes of the patients with alveolar bone grafts for dental implant rehabilitation were audited between January 2007 …

Effects Of Nutritional Therapy On Nutritional Status In Patients Undergoing Orthognathic Surgery: A Randomised Clinical Trial, Naratorn Prachasartta

Chulalongkorn University Theses and Dissertations (Chula ETD)

Orthognathic surgery can limit oral intake postoperatively, leading to the loss of weight and muscle mass, which can weaken the immunity. To ensure proper perioperative care, it is crucial to provide adequate nutrition and mitigate surgical stress-induced catabolism. However, research on nutrition therapy for orthognathic surgery patients is limited. Therefore, our study aimed to investigate the nutritional status of patients who received nutritional therapy. Thirty-four patients were randomly assigned into two groups: one receiving nutritional counselling only and the other receiving nutritional counselling with an oral nutritional supplement. We collected data on weight, muscle mass, fat mass, handgrip strength, biomarkers, …

The Outcomes Of Using Thai Biphasic Calcium Phosphate For Bone Augmentation In Implant Dentistry, Sirida Arunjaroensuk

Chulalongkorn University Theses and Dissertations (Chula ETD)

Aims: The aim of this randomized, double-blind, clinical trial was to compare the stability of the horizontal dimensions (facial bone thickness) of augmented bone using Biphasic Calcium Phosphate (BCP) with hydroxyapatite/ β-tricalcium phosphate ratio of either 60/40 or 70/30. Materials and Methods: Sixty dental implants placed with contour augmentation in the esthetic zone were randomized to 60/40 BCP (n=30) or 70/30 BCP (n=30). Cone-Beam Computed Tomographic was used to assess facial bone thickness post-implantation and 6 months later at implant platform and 2, 4, and 6 mm apical to it. Results: The percentage of horizontal dimension reduction was 23.64%, 12.83%, …

Use Of Passive Immobilization During Oral Conscious Sedation: Parental Perceptions And Utilization By Pediatric Dentists In The United States, Jennifer N. Levine

Theses and Dissertations

Use of Passive Immobilization During Oral Conscious Sedation: Parental Perceptions and Utilization by Pediatric Dentists in The United States, Levine J, Caudill, C (Virginia Commonwealth University School of Dentistry, Richmond, VA)

Research supported by the Alexander Fellowship

Purpose: To assess change in parental attitudes of passive immobilization after viewing an informational video and evaluate how pediatric dentists are currently using passive immobilization during oral conscious sedations (OCS).

Methods: A survey consisting of six statements on a 5-point Likert scale was completed by parents at their child’s OCS consultation appointment before and after viewing an educational video demonstrating benefits of passive …

The Effect Of Crowding On The Accuracy Of 3d Printed Aligners, Tonya Spangler

Theses and Dissertations

Purpose: To evaluate the accuracy of three-dimensionally (3D) printed aligners compared to conventional vacuum-formed thermoplastic aligners with varying levels of dental crowding.

Methods: Digital intraoral scans of 10 different cases were assigned to their respective groups (n=10, each, 30 total) as follows: no crowding (control), moderate crowding, and severe crowding. Using 3Shape software, digital aligner samples were created in standard tessellation language (STL) file format and randomly 3D printed. The same STL files of each case were also sent to a dental laboratory for the fabrication of vacuum-formed samples, which is the current technology used for manufacturing aligners. The intaglio …

The Value Of Educating Teachers, Coaches, And Athletic Trainers On The Management Of Dental Trauma., Laura Satoski

Theses and Dissertations

Purpose: The aim of this study is to investigate the baseline knowledge and assess the benefit of educating teachers, coaches, and athletic trainers about the management of sports-related dental injuries.

Methods: Teachers, coaches, and athletic trainers working in youth sports activities across the city of Richmond and the Greater Richmond Region were recruited via email. Participants answered a pre-seminar survey to evaluate their baseline knowledge and determine whether they experienced dental trauma with their athletes previously. The survey also indicated whether they participated in a public or private sports facility. The participants watched a pre-recorded virtual seminar educating them on …

Peri-Implantitis Incidence And Effect Of Supportive Periodontal Therapy On Outcomes: Retrospective Cohort Study, Michael Ha

Theses and Dissertations

Purpose: Management of peri-implantitis is becoming an increasing component of dental practice. Dental implants can develop peri-implantitis lesions which occur in a non‐linear and accelerating pattern compared to a gradual periodontitis lesion. It is crucial to diagnose and treat this disease early, or ideally prevent it. Contemporary implants have a rough surface texture which is difficult to properly decontaminate as a crucial component for treatment prognosis. Evidence on the long-term effects of Periodontal implant maintenance therapy (PIMT) on implants is limited. This study aims to investigate the effect of periodontal maintenance on peri-implant tissue health.

Methods: A retrospective chart review …

Removal Of Prefabricated Zirconia Crowns From Primary Anterior Teeth With Er,Cr:Ysgg Laser Compared To A High-Speed Handpiece: An In- Vitro Study, Andrew Crowell

Theses and Dissertations

Purpose: The aim of this study was to compare the time and pulpal temperature changes associated with the removal of prefabricated zirconia crowns from primary anterior teeth using an Er,Cr:YSGG laser compared to a rotary hand-piece.

Methods: This in-vitro study was conducted using extracted primary incisors. Teeth were prepared and restored with prefabricated zirconia crowns (NuSmile^®, Houston, TX, USA) sizes 4 and 5 cemented with resin-modified glass-ionomer cement. Restored teeth were stored in a humidor for at least 48 hours prior to removing crowns from the teeth using either an air-rotary hand-piece (HG, N=17) or erbium, chromium: …

Exploring Dynamic Navigation For Palatally Impacted Canine Uncovery Surgery., Daniel Joseph Hall

Theses and Dissertations

Purpose: The objective of this study was to compare the exposure/uncovery of palatally impacted canines via the use of dynamic navigation guidance to the traditional freehand approach. Outcomes evaluated include the time to plan and perform exposure, area/size of initial access to locate the impacted tooth and the final size of the osteotomy to completely uncover the impacted tooth.

Methods: In order to simulate various frequently encountered clinical scenarios, three different model types were used. Six plastic models of each model type were fabricated from epoxy resin. Each model contained 2 bilaterally, palatally impacted canines, that were randomly embedded in …

Detection And Reporting Of Child Abuse And Neglect: A Survey Amongst Pediatric Dental Care Providers In The United States, Daniel J. Lander

Theses and Dissertations

Purpose: The purpose of this study is to survey pediatric dental care providers in the United States to evaluate their knowledge in the detection and reporting of child abuse and neglect (CAN). Methods: This study has been modeled as a cross sectional- survey based research study. Email invitations were sent to pediatric dentists, orthodontists, and others who work in pediatric dental practices in the United States through email lists of the American Association of Pediatric Dentists (AAPD) and the American Association of Orthodontists (AAO). The survey completion page included sample text and the public survey link for providers to use …

Knowledge, Attitudes, And Expectations Among Certified Nursing Assistants Providing Oral Care To Individuals With Alzheimer's Disease Or Another Form Of Dementia Utilizing Music Therapy, Gina Dunn

EWU Masters Thesis Collection

Purpose: Current literature was aimed to explore CNAs attitudes, knowledge, and expectations on the use of music for individuals with Alzheimer’s Disease (AD)/dementia while providing oral care.

Methods: A single survey, 5-point Likert scale survey that included demographic and qualitative questions, was posted on a private CNA Facebook group page. The survey was posted to explore attitudes, knowledge, and expectations of CNAs towards the use of music therapy. Data was analyzed using descriptive statistics, Chi-square, and thematic coding.

Results: A convenience sample of (N = 55) CNAs participated in the study. IBM SPSS® version 28.0.1 was used to analyze the …

Cytotoxic Effects Of Potential Irrigants For Endodontic Surgery, Kaiying Haggard

Graduate Theses, Dissertations, and Problem Reports (ETD)

Purpose: The aim of this study is to investigate if hypochlorous acid (Vashe and Endocyn), Ozone, sodium hypochlorite (0.5% NaOCl), chlorhexidine (0.12% CHX), and MTAD can be used as a disinfectant for endodontic surgery without causing bone tissue toxicity by comparing their cytotoxic effects to saline on osteoblasts in vitro.

Methods: Human Fetal Osteoblast Cells (hFOB 1.19, ATCC CRL-11372) were used. The cells viability after 10-minute exposure of Vashe, Endocyn, Ozone, NaOCl (0.5%), CHX (0.12%), MTAD, and saline at concentrations of 10, 30, 60, 90 % volume ratio were measured using CCK8 analysis and the absorbance were measured at 450 …

Squamous Cell Carcinoma Arising In An Epidermal Inclusion Cyst, Suzanne Alkul, Christopher N Nguyen, Nisha S Ramani, Mahmud Alkul, Ida Orengo, Ikue Shimizu, Bhuvaneswari Krishnan

Faculty, Staff and Students Publications

Squamous cell carcinoma (SCC) arising from an epidermal inclusion cyst (EIC) is uncommon. We present a case of a 70-year-old man with a scalp nodule with persistent discharge that was resected based on the clinical impression of an EIC. Histopathologic exam showed an infundibular EIC with an epidermal type of squamous epithelium; however, some of the cyst lining and lumen was replaced by squamous proliferation with malignant features. There are 56 cases of SCC arising in EICs reported in the English literature. Though suspected EICs are commonly benign, a thorough pathologic evaluation is required to rule out malignancy.