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Full-Text Articles in Dentistry
การบริหารลิ้นสำหรับผู้ป่วยสูงอายุที่ได้รับการรักษาทางศัลยกรรมช่องปากเพื่อเพิ่มความแข็งแรงของลิ้นและประสิทธิภาพในการกลืน, ธันย์ชนก สุพพัตพงศ์
การบริหารลิ้นสำหรับผู้ป่วยสูงอายุที่ได้รับการรักษาทางศัลยกรรมช่องปากเพื่อเพิ่มความแข็งแรงของลิ้นและประสิทธิภาพในการกลืน, ธันย์ชนก สุพพัตพงศ์
Chulalongkorn University Theses and Dissertations (Chula ETD)
ที่มาและความสำคัญ: ภาวะกล้ามเนื้อลีบจากอายุที่เพิ่มขึ้น (Age-related sarcopenia) ส่งผลให้มวลกล้ามเนื้อและความแข็งแรงของลิ้นในผู้สูงอายุลดลง ซึ่งนำไปสู่ความบกพร่องในการกลืน (dysphagia) และเพิ่มความเสี่ยงต่อภาวะทุพโภชนาการ การสำลักปอดอักเสบ และการเสื่อมถอยของสมอง การออกกำลังกายเพิ่มความแข็งแรงของลิ้น (Tongue-strengthening exercises - TSEs) สามารถช่วยเพิ่มความแข็งแรง ความหนาของลิ้น และการทำงานของการกลืนในผู้สูงอายุที่สุขภาพดีได้ วัตถุประสงค์: เพื่อศึกษาผลของการออกกำลังกายลิ้นรูปแบบต่างๆ ต่อการเพิ่มความแข็งแรง ความทนทานของลิ้นและการกลืนในผู้สูงอายุวิธีการ: ทำการสุ่มอาสาสมัครผู้สูงอายุสุขภาพดีจำนวน 36 คน ที่มีอายุ 65 ปีขึ้นไป ซึ่งเข้ารับการถอนฟันแบบง่ายเพียงซี่เดียวที่ภาควิชาศัลยศาสตร์ช่องปากและแม็กซิลโลเฟเชียล ที่คณะทันตแพทยศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย จากนั้นสุ่มแบ่งเป็น 3 กลุ่ม ได้แก่ กลุ่มลิ้นห่อ (Tongue wrap) กลุ่มลิ้นมุมปาก (Tongue corner) และกลุ่มทาสีลิ้น (Tongue paint) โดยประเมินความแข็งแรงของลิ้น (Tongue strength) ความทนทานของลิ้น (Tongue endurance) และทดสอบความสามารถในการกลืนโดยการกลืนด้วยวิธี Repetitive Saliva Swallowing Test (RSST) ใน 2 ช่วงเวลา คือก่อนเริ่มฝึก (T0) และสัปดาห์ที่ 4 หลังการฝึก (T1) ผลการศึกษา: ในกลุ่มลิ้นทาสีพบว่าความแข็งแรงของลิ้นส่วนหน้า (Anterior Tongue Strength - ATS) และความแข็งแรงของลิ้นส่วนหลัง (Posterior Tongue Strength - PTS) เพิ่มขึ้นอย่างมีนัยสำคัญหลังการฝึก 4 สัปดาห์ (p < 0.05) โดยความแข็งแรงของลิ้นทั้งส่วนหน้าและส่วนหลังในเพศชายของกลุ่มทาสีลิ้นเพิ่มขึ้นอย่างมีนัยสำคัญ (p < 0.05) ส่วนความแข็งแรงของลิ้นทั้งส่วนหน้า ส่วนหลัง และความทนทานของลิ้นส่วนหน้าในกลุ่มลิ้นห่อและกลุ่มลิ้นมุมปากเพิ่มขึ้นจากค่าเริ่มต้น แต่ไม่มีนัยสำคัญทางสถิติ สรุป: การออกกำลังกายลิ้นด้วยการทาสีลิ้นอาจเป็นวิธีที่มีประสิทธิภาพสำหรับการเพิ่มความแข็งแรงของลิ้น
Accuracy Of Intraoral Scanner For Centric Relation Record In Comparison To Vinyl Polysiloxane, Rawinan Luangsukrerk
Accuracy Of Intraoral Scanner For Centric Relation Record In Comparison To Vinyl Polysiloxane, Rawinan Luangsukrerk
Chulalongkorn University Theses and Dissertations (Chula ETD)
The study aimed to compare the accuracy of digital centric relation (CR) recordings from intraoral scanners with conventional CR bite registration through a quantitative comparison of occlusal contacts. This cross-sectional study involved 29 healthy adults. CR was recorded using the bimanual manipulation technique, guided by silicone bite indexes (Silagum-Putty; DMG, Germany). Conventional bite registrations were made with vinyl polysiloxane (O-Bite; DMG, Germany), and digital interarch relationships were captured using an intraoral scanner (iTero Element 2; Align Technologies, USA). The maxillary and mandibular arches were digitized with the intraoral scanner, and CR was recorded through the silicone bite index. Each recording …
Esthetic Evaluation Of Implant Restoration In Esthetic Zone: A Long-Term Follow-Up, Harit Muangmore
Esthetic Evaluation Of Implant Restoration In Esthetic Zone: A Long-Term Follow-Up, Harit Muangmore
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective: This study aimed to evaluate the correlation between esthetic outcomes of single-tooth implant restorations (STIRs) in the anterior maxilla, assessed by the Pink Esthetic Score (PES), White Esthetic Score (WES), and the newly introduced Esthetic Sustainable Criteria (ESC), over two follow-up periods: 5 years and 10 years. Materials and Methods: A cross-sectional retrospective study was conducted involving 22 patients treated with STIRs at the Faculty of Dentistry, Chulalongkorn University, from January 2009 to December 2024. Patient demographics, treatment protocols, and follow-up assessments were collected at both 5 and 10 years. PES and WES were utilized to evaluate esthetic outcomes, …
The Effect Of Systemic Antibiotics On Post-Surgical Complications And Patient-Reported Outcomes In Dental Implant Surgery With Simultaneous Sinus Floor Augmentation, Sutinee Tangamnuay
The Effect Of Systemic Antibiotics On Post-Surgical Complications And Patient-Reported Outcomes In Dental Implant Surgery With Simultaneous Sinus Floor Augmentation, Sutinee Tangamnuay
Chulalongkorn University Theses and Dissertations (Chula ETD)
Unnecessary antibiotic prescriptions can raise healthcare costs and affect the quality of life due to their related side effects. Objectives: Aim to assess the impact of antibiotic prophylaxis (AP) on the prevalence of postoperative complications in patients undergoing simultaneous implant placement with lateral sinus floor augmentation. Materials and Methods: A randomized, triple-blind, placebo-controlled trial was conducted involving 30 healthy patients. Participants were divided into two groups: one received 2g of amoxicillin before surgery and 500mg three times daily for three days post-surgery (antibiotic group, N=15), while the other received a placebo (N=15). Postoperative complications were evaluated at 2, 4, and …
The Influence Of Implant Thread Designs On The Secondary Stability Of Dental Implant, Rujira Charoenniwassakul
The Influence Of Implant Thread Designs On The Secondary Stability Of Dental Implant, Rujira Charoenniwassakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective: This study aimed to evaluate the secondary stability of aggressive thread design implant (BLX) comparing to nonaggressive thread design implant (BL) using Implant Stability Quotient (ISQ) values and Implant stability test (IST) values. Materials and Methods: Forty-five patients with healed edentulous areas were included and randomly allocated into test and control groups. Thirty-two BLX implants and thirty-two BL implants were used in the test and control groups, respectively. Dental implant stability was assessed using IST and ISQ values. IST values were measured immediately (T1), on day 2 (T2), and at 1 (T3), 2 (T4), 3 (T5), 4 (T6), 5 …
การศึกษาการสึกระหว่างโคบอลต์โครเมียมและวัสดุเซรามิกที่ใช้ในงานทันตกรรมดิจิตอล, มรกต ไทยรัตน์
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
Effect Of Chromium Metal Alloy Fabrication Techniques On Enamel Wear, Pattrapond Eopsirisuk
Effect Of Chromium Metal Alloy Fabrication Techniques On Enamel Wear, Pattrapond Eopsirisuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
This in vitro study aimed to investigate the effect of different chromium metal alloys on enamel wear through longitudinal observation across various simulated chewing cycles. Four groups of alloys were studied (n=10 per group): casting Ni-Cr alloys (NC), casting Co-Cr alloys (CC), SLM Co-Cr alloys (CS), and heat-treated SLM Co-Cr alloys (CS-H). The test simulated chewing of enamel cusps against the alloys in distilled water under specific conditions (49 N load, 0.7 mm sliding movement, and 1.6 Hz frequency). Enamel wear was measured at 60,000, 120,000, and 240,000 cycles by using intraoral scanner matching with open-source 3D software. Enamel wear …
ผลของการปรับสภาพพื้นผิวต่อกำลังแรงยึดเฉือนระหว่างวัสดุครอบฟันชั่วคราวกับแบร็กเกตจัดฟันโลหะ, มนนภัส เลาหะอัญญา
ผลของการปรับสภาพพื้นผิวต่อกำลังแรงยึดเฉือนระหว่างวัสดุครอบฟันชั่วคราวกับแบร็กเกตจัดฟันโลหะ, มนนภัส เลาหะอัญญา
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยมีวัตถุประสงค์เพื่อเปรียบเทียบกําลังแรงยึดเฉือนระหว่างแบร็กเกตจัดฟันโลหะกับครอบฟันชั่วคราวชนิดต่าง ๆ ที่ใช้การปรับสภาพพื้นผิวที่แตกต่างกัน เตรียมวัสดุบูรณะครอบฟันชั่วคราว 3 ชนิด ได้แก่ พอลิเมทิลเมทาคริเลตชนิดบ่มด้วยตัวเอง (Unifast™ Trad) พอลิเมทิลเมทาคริเลตชนิดแคดแคม (CADCAM VIPI Block) และเรซินคอมโพสิตชนิดบิสเอคริล (Protemp™ 4) จำนวน 4 กลุ่ม กลุ่มละ 11 ชิ้น นำวัสดุปรับสภาพพื้นผิวด้วยการทามอนอเมอร์เมทิลเมทาคริเลต การเป่าผงอะลูมินัมออกไซด์ การใช้เข็มกรอกากเพชร และกลุ่มที่ไม่ได้ถูกปรับสภาพพื้นผิวเป็นกลุ่มควบคุม นำชิ้นงานตรวจความหยาบของพื้นผิวและส่องด้วยกล้องจุลทรรศน์อิเล็กตรอนแบบส่องกราด ทำการยึดติดแบร็กเกตจัดฟันโลหะด้วยเรซินแอดฮีซีฟทรานสบอนด์ เอ็กซ์ที นำไปทดสอบค่ากำลังแรงยึดเฉือนด้วยเครื่องทดสอบอเนกประสงค์โดยใช้ความเร็วในการทดสอบที่ 1 มิลลิเมตรต่อนาที ศึกษาดัชนีส่วนเหลือของสารยึดติดด้วยกล้องจุลทรรศน์ชนิดสเตอริโอ วิเคราะห์ด้วยสถิติการวิเคราะห์ความแปรปรวนแบบสองทางที่ระดับนัยสําคัญ 0.05 และเปรียบเทียบแต่ละกลุ่มโดยใช้สถิติ Games-Howell test ผลการศึกษาพบว่าวัสดุบิสเอคริลการเป่าผงอะลูมินัมออกไซด์มีค่ากำลังแรงยึดเฉือนสูงที่สุด ตามมาด้วยการใช้เข็มกรอกากเพชร และการทามอนอเมอร์ ตามลำดับ วัสดุพอลิเมทิลเมทาคริเลตชนิดแคดแคมการเป่าผงอะลูมินัมออกไซด์มีค่ากำลังแรงยึดเฉือนสูงที่สุด ตามด้วยการทามอนอเมอร์ และการใช้เข็มกรอกากเพชร ตามลำดับ และวัสดุพอลิเมทิลเมทาคริเลตชนิดบ่มด้วยตัวเองการทามอนอเมอร์และการเป่าผงอะลูมินัมออกไซด์ มีค่ากำลังแรงยึดเฉือนสูงที่สุดโดยไม่แตกต่างกันอย่างมีนัยสำคัญทางสถิติ ตามด้วยการใช้เข็มกรอกากเพชร ดังนั้นการปรับสภาพพื้นผิวด้วยการเป่าผงอะลูมินัมออกไซด์มีประสิทธิภาพในการเพิ่มแรงยึดติดแบร็กเกตจัดฟันมากที่สุด ในพอลิเมทิลเมทาคริเลตชนิดบ่มด้วยตัวเองควรทามอนอเมอร์เมทิลเมทาคริเลตเพิ่มเติม และวัสดุบิสเอคริลมีแรงยึดติดกับแบร็กเกตจัดฟันมากที่สุดหลังปรับสภาพพื้นผิวเชิงกล
Effect Of Aprotic Solvents On The Microtensile Bond Strength Of Composite Core And Fiber-Reinforced Composite Posts, Wisarut Prawatvatchara
Effect Of Aprotic Solvents On The Microtensile Bond Strength Of Composite Core And Fiber-Reinforced Composite Posts, Wisarut Prawatvatchara
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective: The purpose of this study was to examine the effect of aprotic solvents, which were tetrahydrofuran, pyridine, and morpholine, compared to hydrogen peroxide on surface roughness of fiber-reinforced composite post and microtensile bond strength between fiber-reinforced composite post surfaces and the composite core. Material and methods: A total of 75 FRC posts plus, and 75 D.T. light posts were divided into 3 groups (non-thermocycling, 5,000-cycle and 10,000cycle thermocycling groups). Each group was divided into five subgroups according to the post-surface treatment: C: non-treatment group; H2O2: immersing with 35% hydrogen peroxide; THF: immersing with tetrahydrofuran; PY: immersing with pyridine; MP: …
A Comparison Of Crestal Bone Loss Between Healing Abutment And Customized Abutment; 6 Months Clinical Observation, Adison Jirasuwannakul
A Comparison Of Crestal Bone Loss Between Healing Abutment And Customized Abutment; 6 Months Clinical Observation, Adison Jirasuwannakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Adison Jirasuwannakul : A Comparison of crestal bone loss between healing abutment and customized abutment ; 6 months clinical observation. Advisor: Associate Professor Pravej Serichetaphongse, D.D.S., M.S . Co-advisor: Asst. Prof. Wareerat Chengprapakorn,, D.D.S., Ph.D. Objective : To compare the effect on marginal bone loss between using healing abutment and customized abutment (Definite abutment). Material and method : Thirdtyfour patients who required a single posterior implant-supported prosthesis were randomly divided into two groups which were healing abutment group (Control group)and customized titanium abutment group(Test group). Patients received one dental implant between 4.0 and 5.0 mm. diameter (Dentium Superline, Dentium, Seoul, …
The Effect Of Different Functional Monomer Of Zirconia Primer And Universal Adhesive On Shear Bond Strength Of Zirconia To Composite Resin Using Resin Cement, Pimchanok Pitakassawakul
The Effect Of Different Functional Monomer Of Zirconia Primer And Universal Adhesive On Shear Bond Strength Of Zirconia To Composite Resin Using Resin Cement, Pimchanok Pitakassawakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Zirconia has been increasing used due to its good mechanical properties but the study about the ability to bond to zirconia ceramic is still limited. The purpose of this study is to evaluate the bond strength of zirconia using MDP-containing zirconia primer and GPDM-containing universal adhesive. Twenty-one super-high translucent zirconia discs (Ceramil zolid fx White; AMANN GIRRBACH, Austria), 8.5 mm in diameter and 3.2 mm in thickness, were prepared. The specimens were divided into 3 groups (n=7) according to primer application, Group I: no primer application (control group), Group II: Z-Prime plus® (Bisco, Schaumburg, Illinois, USA) and Group III: Optibond …
M2 Macrophages In Human Periapical Lesions In Relation To Histopathological Diagnosis, Clinical Features, And Lesion Volume, Supanant Visarnta
M2 Macrophages In Human Periapical Lesions In Relation To Histopathological Diagnosis, Clinical Features, And Lesion Volume, Supanant Visarnta
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study evaluated M1 and M2 macrophage polarization in human periapical cysts and granulomas through an immunohistochemical analysis and investigated the correlation between the macrophage polarization and histopathological diagnosis, clinical features and lesion volume using cone-beam computed tomography. The periapical biopsies histopathologically diagnosed as radicular cyst (n=52) and periapical granuloma (n=51) were analyzed by immunohistochemical method. Immuno-expressions of CD68 and CD163 were quantified. The CD68/CD163 ratio was adopted to represent M1 or M2 macrophage polarization. Pathological diagnosis, patients’ age, gender, clinical signs and symptoms, tooth location of the periapical lesion, and history of root canal treatment were obtained from treatment …
Comparison Of Removal Torques Among Different Abutments In Single Implant Crowns After Cyclic Loading: An In Vitro Study, Suppanut Jongsiri
Comparison Of Removal Torques Among Different Abutments In Single Implant Crowns After Cyclic Loading: An In Vitro Study, Suppanut Jongsiri
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: To evaluate the effect of different restoration designs on the removal torque loss of implant-supported maxillary first premolar crowns after cyclic loading and to measure the impact of cyclic loading on removal torque. Materials and Methods: Thirty-two dental implants (4.0*10 mm), embedded in resin blocks and their abutments, were divided into 4 groups (n=8) based on restoration design: screwmentable group, 2 cement-retained groups: cemented with adhesive resin cement (Panavia V5) or provisional cement (RelyX Temp NE), and screw-retained one-piece titanium group. Monolithic zirconia crowns were fabricated and cemented in the first three groups. Their removal torques were recorded using …
The Alleviating Effects Of Epidermal Growth Factor On An In Vitro Oral Mucositis Model In The Presence Of Fusobacterium Nucleatum, Tien Thi Trieu Truong
The Alleviating Effects Of Epidermal Growth Factor On An In Vitro Oral Mucositis Model In The Presence Of Fusobacterium Nucleatum, Tien Thi Trieu Truong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: 5-fluorouracil (5-FU) is commonly used as a chemotherapy drug for head and neck cancers. However, it often produces an adverse cytotoxic effect on the oral epithelia leading to oral mucositis (OM) in cancer patients. Thus, reversing this cytotoxic effect locally with novel bioactive drugs or factors is necessary. This study aimed to investigate the rescue effect of Nicotiana benthamiana plant-derived epidermal growth factor (P-EGF) on human normal oral keratinocytes (NOKs) exposed to 5-FU-induced cytotoxicity in the presence of Fusobacterium nucleatum (Fn). Materials and Methods: Cytotoxicity and ATP-dependent proliferation and metabolism of NOK monolayer cultures were assessed after 48 hours …
Effects Of Self-Adhesive Resin Cements On Human Gingival Fibroblasts, Kittipat Termteerapornpimol
Effects Of Self-Adhesive Resin Cements On Human Gingival Fibroblasts, Kittipat Termteerapornpimol
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: To investigate the response of primary human gingival fibroblasts (HGFs) to self-adhesive resin cement (SARC) extracts. Methods: Two types of SARCs, RelyXTM U200 (RX) and Maxcem EliteTM Chroma (MC), were polymerized using various curing methods (light-cured, light-cured through 1- or 2-mm zirconia, and self-cured) (n=9/group). HGFs were exposed to cement extracts at different concentrations. Treated HGFs were assessed for cell viability, vitality, wound healing, and gene expression at different time points. Results: Dual-cured MC left self-cured and MC cured through 2 mm zirconia at high concentration significantly decreased the viability of HGFs. Delayed wound healing was observed in MC …
Efficacy Of Nanogel From Grafted Hyaluronic Acid Saliva Substitutes In The Treatment Of Dry Mouth, Nongnapat Eakpunyakul
Efficacy Of Nanogel From Grafted Hyaluronic Acid Saliva Substitutes In The Treatment Of Dry Mouth, Nongnapat Eakpunyakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objective of this study was to evaluate the efficacy of HA-pNIPAM spray or Hy-N spray in treating dry mouth and to evaluate patient satisfaction with Hy-N spray. This study was a randomized double-blind crossover study conducted on patients with dry mouth. They were given three saliva substitutes: Hy-N, placebo, and Biotène spray, which were randomly allocated in a different order. Each spray was used for 1 week, followed by a 3-day wash-out period. The instruction was to use the sprays four times a day. A total of twenty-nine patients completed the study. A significant increase in unstimulated whole saliva …
Comparing Medium To Long-Term Esthetic, Clinical And Patient-Reported Outcomes Between Freehand And Computer-Assisted Dental Implant Placement, Sun Heng
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective: The aim of the study was to compare medium to long-term clinical and patient reported outcomes between implants placed with Computer-assisted Implant Surgery (CAIS) and freehand protocols. Materials and Methods: Thirty dental implants in the anterior maxillary region with an average of 4 years after loading were assessed by means of Pink Esthetic Scores (PES), Marginal Bone Level (MBL), clinical and patient reported outcomes. Results: CAIS significantly outperformed freehand placement with regards to PES scores (p=0.011). Likewise, implants placed with CAIS showed significantly higher marginal bone levels (p<0.001). Bleeding on Probing, Probing depth and prevalence of mucositis did not differ between the groups, while no peri-implantitis was diagnosed. Conclusions: The use of CAIS lead to superior outcomes in terms of esthetics and marginal bone levels for implants placed in the aesthetic zone as observed in medium to long-term follow-up. No difference was however observed with regards to peri-implant mucosa inflammation.
Comparison Of Learning Curve In Novice And Experienced Operators Between Anterior And Posterior Implant Placement Using Dynamic Computer Assisted-Surgical Implant Placement: Randomized Controlled Trials, Pitsinee Kundaechanont
Comparison Of Learning Curve In Novice And Experienced Operators Between Anterior And Posterior Implant Placement Using Dynamic Computer Assisted-Surgical Implant Placement: Randomized Controlled Trials, Pitsinee Kundaechanont
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives: To observe the equivalence of learning curve between anterior and posterior implant placement and between novice and experienced operators using dynamic computer assisted-surgical implant placement (CAIS) with type-III bone model simulated maxilla. Materials and Methods: Eight participants, including four novices and four experienced operators, were randomly assigned in blocks to either anterior or posterior placement group. Prior to the experiment, participants underwent video-training. Each participant performed four single implant placements per session with a 7±1 days wash-out period, totaling five attempts. The operating time, coronal, depth, and angle deviations in each attempt were recorded and analyzed by a blind …
Analysis Of Gene Expression And Histology Of Bone Regeneration Using Mrna Encoding Bone Morphogenetic Protein-2 In Rat Femur, Duangporn Yongyosrungrueng
Analysis Of Gene Expression And Histology Of Bone Regeneration Using Mrna Encoding Bone Morphogenetic Protein-2 In Rat Femur, Duangporn Yongyosrungrueng
Chulalongkorn University Theses and Dissertations (Chula ETD)
The quality of bone healing is an important factor in dental implant treatment. Currently, there is only limited research on using mRNA encoding BMP-2 to improve the quality and quantity of bone. This study aimed to evaluate the effectiveness of bone healing in rat femur defect after delivery of dPBS, rhBMP-2 and mRNA-encoding BMP-2 (BMP-2 mRNA-LNP). Histology approach was used to measure the quantity of newly formed bone. RT-qPCR was used to study gene expression levels of BMP-2, OCN, BSP and TNF-α. Subsequently, RNA-Seq analysis was performed at six weeks post-operation. Histological study revealed that BMP-2 mRNA-LNP group had significantly …
The Effect Of Different Self-Adhesive Resin Cements On Shear Bond Strength Of Hybrid Ceramic And Dentin, Rattawich Hoonsuwan
The Effect Of Different Self-Adhesive Resin Cements On Shear Bond Strength Of Hybrid Ceramic And Dentin, Rattawich Hoonsuwan
Chulalongkorn University Theses and Dissertations (Chula ETD)
ActivaTM bioactive is the first developed of dual cured, self-adhesive resin cement. For this in vitro study was to compare and evaluate the three differentsshear bond strength among ActivaTM bioactive, Maxcem EliteTM and RelyXTMU200 cement, when used as adhesive between CAD-CAM hybrid ceramic; Vita EnamicTM and dentin surface. The Vita EnamicTM block was designed and fabricated into forty-two discs shaped with CAD software. Forty-two extracted third maxillary molars was also collected. The all teeth were free of dental caries, restoration and cracked line were mounted vertically in the epoxy resin with exposedthe occlusal surface. Dentin surfaces were flatted surface by …
Micro-Computed Tomography And Mechanical Test Of Bone Regeneration Using Mrna Encoding Bone Morphogenetic Protein-2 With Implant Placement In Rat Femur, Kanoksiri Jriyasetapong
Micro-Computed Tomography And Mechanical Test Of Bone Regeneration Using Mrna Encoding Bone Morphogenetic Protein-2 With Implant Placement In Rat Femur, Kanoksiri Jriyasetapong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research evaluates the effectiveness of a modified mRNA encoding bone morphogenetic protein-2 (m1Ψ-BMP-2 mRNA) with N1-methylpseudouridine modifications on bone regeneration and integration after implantation into rat femur defects. In the study, twelve femurs from six Sprague-Dawley rats underwent titanium wire insertation. These femur defects were then filled with either 5 μg of m1Ψ-BMP-2 mRNA, 15 μg of m1Ψ-BMP-2 mRNA, or Dulbecco's phosphate-buffered saline (dPBS) in a randomized manner (N=4 each group) Six weeks post-implantation, the rats were euthanized for evaluation using micro-computed tomography and a mechanical push-out test. The Micro-CT analysis focused on several parameters including total bone volume, …
Effect Of Different Implant Angulations And Insertion-Removal Cycles On The Retentive Force Of Locator And Locator R-Tx Attachments, Jidapha Tangtrongmit
Effect Of Different Implant Angulations And Insertion-Removal Cycles On The Retentive Force Of Locator And Locator R-Tx Attachments, Jidapha Tangtrongmit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aims to assess the implant of varying angulations and insertion-removal cycles on the retentive force of 2 denture attachments. The blocks were produced via 3D printing and divided into 2 groups: the LOCATOR attachment with orange retentive inserts and the LOCATOR R-Tx attachment with pink retentive inserts. Each group was divided into 3 subgroups based on implant angulation at 0-, 15-, and 30-degree implant angulation. The insertion-removal cycles were performed in 37 ±1°C deionized water using an INSTRON E1000 machine. Retentive force tests were conducted using a universal testing machine at baseline, after 270, 540, 810, 1080, 2160, …
The Effect Of Water Sorption And Solubility On Surface Properties Of Cad/Cam Materials, Chatchalanya Wansudon
The Effect Of Water Sorption And Solubility On Surface Properties Of Cad/Cam Materials, Chatchalanya Wansudon
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objective of this research was to examine sorption, solubility, and surface properties of three widely used CAD/CAM materials: resin composite (Cerasmart; CS), polymer-infiltrated ceramic network (Vita Enamic; VE) and lithium disilicate glass ceramic (IPS e.max CAD; LS). 45 rectangular-shaped specimens were prepared and immersed in deionized water for varying durations. These specimens were then subjected to evaluate their water sorption, solubility, surface roughness, and surface hardness. The results showed that immersion time significantly impacted water sorption of the tested materials (P.05). The 2-way ANCOVA revealed that water immersions had significant effects on surface hardness among tested CAD/CAM blocks (P.05). …
The Effect Of Universal Adhesives On Repairability Of Four Cad/Cam Blocks, Tanyaporn Treyasorasai
The Effect Of Universal Adhesives On Repairability Of Four Cad/Cam Blocks, Tanyaporn Treyasorasai
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to assess the repairability among four CAD/CAM blocks repaired with different universal adhesives after aging. The CAD/CAM blocks evaluated were polymer infiltrated ceramic network (VE), zirconium-reinforced lithium silicate ceramic (VS), feldspathic ceramic (VM), and lithium disilicate ceramic (IE). Each original block was prepared to create 120 specimens. After 10,000 cycles of thermocycling, surface pretreatment of each specimen was carried out by grinding and etching with a 9% hydrofluoric acid. Subsequently, specimens were divided into three groups: Clearfil™ TRI-S BOND (CUB), Scotchbond Universal Plus® (SUP), and Monobond N® (MN). Resin composite was then applied. All samples underwent another …
Microleakage Of Class Ii Restoration Using Short-Fiber Reinforced Flowable Resin Composite, Parichat Panyawisitkul
Microleakage Of Class Ii Restoration Using Short-Fiber Reinforced Flowable Resin Composite, Parichat Panyawisitkul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective. With short-fiber reinforced resin composite (SFRC), improved mechanical strength and good workability could be achieved within a single material. However, there remains concerns related to microleakage, which could restrict the application of this material in certain clinical situations. Materials and Methods. Class II cavities were prepared in 80 premolars. Each group, consisting of 10 specimens, was restored with different materials: flowable bulk-fill SFRC (EverX Flow, EXF), bulk-fill SFRC (EverX Posterior, EXP), flowable bulk-fill (Tetric N-Flow, TNF), and conventional resin composite (Z350 XT, Z350). The specimens were divided into two subgroups: one underwent thermocycling of 20,000 cycles, while the other …
Gene Expression Of Soft Tissue Covering Bone Grafted With Xenograft In Human, Atithan Termworasin
Gene Expression Of Soft Tissue Covering Bone Grafted With Xenograft In Human, Atithan Termworasin
Chulalongkorn University Theses and Dissertations (Chula ETD)
Soft tissue is one of many factors that influence the esthetic success of dental implants. This study explores soft tissue reaction between soft tissue covering bone grafted with xenograft and soft tissue in normal healing by analyzing the levels of inflammatory cytokine including TNF-α, IL-6, IL-8 and NF-kB1. Soft tissues are collected after 4 to 6 months of healing and analyzed by reverse transcription quantitative polymerase chain reaction (RT-qPCR). The result shows that the relative gene expression of TNF-α, IL-6, IL-8, and NF-kB1 are not significantly different in soft tissue covering xenograft compared to the ones in soft tissue covering …
Effect Of Variations In Translucency Of Cad/Cam Lithium-Disilicate Ceramic And Abutment Color On Optical Color Of Veneer Restoration, Wichaya Likitnuruk
Effect Of Variations In Translucency Of Cad/Cam Lithium-Disilicate Ceramic And Abutment Color On Optical Color Of Veneer Restoration, Wichaya Likitnuruk
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to evaluate the optical color of different translucencies of CAD/CAM lithium-disilicate ceramics on backgrounds with different values. Low translucency (LT) and medium translucency (MT) rectangular-shaped specimens (0.6 mm thickness, shade A1) were fabricated from IPS e.max CAD (EMC; Ivoclar Vivadent) and Amber Mill (AM; HASS). Six specimens of EMC-MT, EMC-LT, AM-MT, and AM-LT were fabricated, resulting in 24 specimens in total. The specimens were placed on six background colors (1M1(reference), 1M2, 2M2, 3M2, 4M2, and 5M2) made of light-cured resin composite (Vita VM LC Base Dentine, Vita Zahnfabrik) using glycerine as a medium. The CIE L*a*b* coordinates …
The Effect Of Surface Treatment And Types Of Translucent Monolithic Zirconia On The Shear Bond Strength Of Porcelain Repaired To Zirconia, Karnkanith Hansomwong
The Effect Of Surface Treatment And Types Of Translucent Monolithic Zirconia On The Shear Bond Strength Of Porcelain Repaired To Zirconia, Karnkanith Hansomwong
Chulalongkorn University Theses and Dissertations (Chula ETD)
In the event of proximal contact loss in a zirconia crown on an implant, the zirconia crown can be modified by adding porcelain to recreate the proximal contact. This study investigated the shear bond strength between translucent zirconia (4Y-PSZ) and veneering porcelain compared to conventional zirconia (3Y-TZP). Zirconia substructures were treated with airborne-particle abrasion with Al2O3. The results of the shear bond strength test were analyzed by One-way ANOVA and post-hoc comparisons with Tukey’s honest significant difference (HSD) test. The shear bond strengthranged from 21.87 and 27.79 MPa. The failure mode was mixed failure in all groups. From the results, …
Influence Of Ceramic Translucency, Ceramic Thickness, And Shades Of Luting Resin Cement On Final Color Of Cad/Cam Lithium Disilicate Veneers, Ploypailin Radeesujalitkul
Influence Of Ceramic Translucency, Ceramic Thickness, And Shades Of Luting Resin Cement On Final Color Of Cad/Cam Lithium Disilicate Veneers, Ploypailin Radeesujalitkul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Purpose. To evaluate the effect of ceramic translucency, ceramic thickness, and cement color on the final optical color of a CAD/CAM lithium disilicate ceramic. Methods. A total of 180 ceramic specimens were prepared into two thicknesses, 0.5 and 1.0 mm, from high translucency (HT), medium translucency (MT), and low translucency (LT) CAD/CAM lithium disilicate ceramics (IPS e.max CAD; Ivoclar Vivadent) in shade A1. Substrates were fabricated from resin composite in shade A3. Two shades of light-cure resin cement, neutral and light plus (Variolink Esthetic LC; Ivoclar Vivadent), were used for cementation, whereas glycerine was used for the control groups. CIE …
A Comparison Of Fracture Load After Mechanical Cyclic Loading Between 3 Different Materials And 2 Designs On Implant-Supported Crown : An In Vitro Study, Thanus Liwwattanakorn
A Comparison Of Fracture Load After Mechanical Cyclic Loading Between 3 Different Materials And 2 Designs On Implant-Supported Crown : An In Vitro Study, Thanus Liwwattanakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objective: To compare the fracture resistance among ultra-translucent zirconia, lithium disilicate, and composite resin implant-supported maxillary premolar crowns with cement-retained or combined cement- and screw-retained designs after cyclic loading simulation. Materials and Methods: Forty-eight maxillary first premolar crowns and their abutments were attached on dental implants (ø4.0 x 10 mm) embedded in epoxy resin blocks. All specimens were equally divided into 6 groups (n=8) based on monolithic crown material (ultra-translucent zirconia (Z), lithium disilicate (L), and composite resin (C)) and restoration design (cement-retained and combined cement- and screw-retained). Each specimen was subjected to 500,000 cycles of cyclic loading. Subsequently, a …