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Publication Open Access Interfacial fracture resistance of ceramic-resin composite bilayer.(2013-09) Chanavut Asvanund; ชนวุตม์ อัศวนันท์; Premwara Triwatana; เปรมวรา ตรีวัฒนา; Kallaya Suputtamongkol; กัลยา ศุพุทธมงคล; Jutamast Thepchai; จุฑามาศ เทพไชย; Kallaya Suputtamongkol; กัลยา ศุพุทธมงคล; Mahidol University. Faculty of Dentistry. Prosthodontics Departmentmodel analysis for bilayered structure should be useful for characterizing the interfacial fracture resistance of dental bilayered specimens.Publication Open Access Clinical performance and failures of zirconia-based fixed partial dentures: a review literature.(2012-05) Premwara Triwatana; เปรมวรา ตรีวัฒนา; Noppavan Nagaviroj; นพวรรณท์ นาควิโรจน์; Chantana Tulapornchai; ฉันทนา ตุลาพรชัย; Chantana Tulapornchai; Mahidol University. Faculty of Dentistry. Department of ProsthodonticsFPDs ranged between 73.9% - 100% after 2 - 5 years. The causes of failure were veneer fracture, ceramic core fracture, abutment tooth fracture, secondary caries, and restoration dislodgment. CONCLUSION. The overall performance of zirconia FPDs... was satisfactory according to either USPHS criteria or CDA evaluations. Fracture resistance of core and veneering ceramics, bonding between core and veneering materials, and marginal discrepancy of zirconia-based restorations were discussed as the causesPublication Open Access ผลของความยาวเดือยฟันชนิดผสมเส้นใยต่อความต้านทาน การแตกหักของฟันที่รักษาคลองรากฟัน(2015-01) เขมจิรา ลอบันดิส; Khemjira Lawbundis; นาฏยา วงษ์ปาน; Nataya Vongphan; อมรา ม่วงมิ่งสุข; Amara Muangmingsuk; พิศลย์ เสนาวงษ์; Pisol Senawongse; นาฏยา วงษปาน; Nataya Vongphan; มหาวิทยาลัยมหิดล คณะทันตแพทยศาสตร์ ภาควิชาทันตกรรมหัตถการและวิทยาเอ็นโดดอนต์Objectives: The objective of this study was to compare the fracture resistance of endodontically treated teeth restored with different fiber post lengths. Materials and methods: Human first lower premolars with one root canal were collected..., Group 3: restored with fiber post with the length of a half distance from buccal cusp tip to 3 mm below the CEJ level and Group 4: restored with fiber post with the length of clinical crown below CEJ. The fracture resistance of specimens was evaluatedPublication Open Access Tensile strength of bilayered ceramics and corresponding glass veneers.(2014-06) Chuchai Anunmana; ชูชัย อนันต์มานะ; Tharee Champirat; ธารี จำปีรัตน์; Bundhit Jirajariyavej; บัณฑิต จิรจริยาเวช; Chuchai Anunmana; ชูชัย อนันต์มานะ; Mahidol University. Faculty of Dentistry. Department of Prosthodontics; Mahidol University. Faculty of Dentistry. Department of Advanced General Dentistryof these two veneers (IPS e.max® Ceram and Lava™ Ceram; n = 30/group) were also prepared. The obtained microbars were tested in tension until fracture, and the fracture surfaces of the microbars were examined with fluorescent black light and scanning electron... tensile strength of monolithic IPS e.max® Ceram. CONCLUSION: Because fracture site occurred mostly in the glass veneer and most failures were away from the interfacial zone, microtensile bond test may not be a suitable test for bonding integrityPublication Open Access Interfacial toughness of bilayer dental ceramics based on a short-bar, chevron-notch test.(2010-02) Chuchai Anunmana; ชูชัย อนันต์มานะ; Anusavice, Kenneth J.; Mecholsky, Jr., John J.; Mahidol University. Faculty of Dentistry. Department of ProsthodonticsObjective—The objective of this study was to test the null hypothesis that the interfacial toughness of each of two types of bonded core-veneer bilayer ceramics is not significantly different from the apparent fracture toughness of the control...). Specimens were kept in distilled water for 30 days before testing in tension. Eight glass veneer bars were prepared for the analysis of fracture toughness test using the indentation-strength technique. Results—The mean interfacial toughness of the LC/GVPublication Open Access Prevalence of cracked tooth in a group of patients at the Faculty of Dentistry, Mahidol University.(2014-09) Siribang-on Piboonniyom Khovidhunkit; สิริบังอร พิบูลนิยม โขวิฑูรกิจ; Sirikwan Songmanee; สิริขวัญ ทรงมณี; Siribang-on Piboonniyom Khovidhunkit; สิริบังอร พิบูลนิยม โขวิฑูรกิจ; Mahidol University. Faculty of Dentistry. Department of Advanced General DentistryObjective: The purpose of this study was to investigate the prevalence of cracked tooth and associated behavioral factors in a group of patients at the Faculty of Dentistry, Mahidol University. Materials and methods: A group of patients who attended the Advanced General Dentistry or Special clinics were invited to participate in this study. Two hundred patients (43 males and 157 females) were enrolled. Informed consent was reviewed and signed by each patient. Medical history and associated risk behaviors which can induce cracked tooth were recorded. Subsequently, all the remaining teeth of each patient were examined. Cracked tooth was defined as a tooth having either craze or cracked line(s) or both. Prevalence rates of cracked tooth according to the number of patients and the number of teeth were reported. Results: The age of the subjects ranged from 12-80 years old (mean 40.9 years). Out of 200 patients, 194 (97%) patients had at least one cracked tooth. In addition, out of 5,096 teeth investigated, 1,932 (37.9%) teeth had either craze or cracked line(s) or both. The most common cracked teeth found on both arches were first permanent molars. The most common associated risk behavior was accidental biting of hard objects. Conclusion: This study showed a high prevalence of at least one cracked tooth in a group of patients at the Faculty of Dentistry, Mahidol University. Dental professionals should be aware of this common problem and advise patients about prevention and proper treatment of cracked tooth.Publication Open Access The effect of zirconia framework design on the failure of all-ceramic crown under static loading.(2015-04-23) Somchai Urapepon; สมชาย อุรพีพล; Pakamard Taenguthai; ผกามาศ แตงอุทัย; Somchai Urapepon; Mahidol University. Faculty of Dentistry. Prosthodontics Departmentat the lingual incline of the buccal cusp until fracture using a universal testing machine with cross-head speed 0.5 mm/min. The load to fracture values (N) was recorded and statistically analyzed by independent sample t-test. RESULTS: The mean and standardPublication Open Access ความต้านทานต่อการแตกหักของฟันที่รักษาคลองรากและบูรณะด้วยเรซินคอมโพสิตชนิดบ่มตัวด้วยแสงร่วมกับปฏิกิริยาเคมีในคลองรากที่ระดับความลึกต่างกัน(2014-01) ปิยาภรณ์ คู่ศรีสมทรัพย์; Piyaporn Kusrisomsup; นาฏยา วงษ์ปาน; Nataya Vongphan; อมรา ม่วงมิ่งสุข; Amara Muangmingsuk; พิศลย์ เสนาวงษ์; Pisol Senawongse; นาฏยา วงษ์ปาน; Nataya Vongphan; มหาวิทยาลัยมหิดล. คณะทันตแพทยศาสตร์. ภาควิชาทันตกรรมหัตถการและวิทยาเอ็นโดดอนต์; Mahidol University. Faculty of Dentistry. Thai Board of Endodontics Faculty of Dentistry; Mahidol University. Faculty of Dentistry. Thai Board of Operatve DentistryObjective: The objective of this study was to compare the fracture resistance of endodontically treated teeth restored with a dual-cured resin composite core material within the root canal at different depths. Materials and methods: Endodontic... with a dual-cured composite resin. The teeth were subjected to a vertical loading in a universal testing machine until the fracture occurred. Data were analyzed by using one-way ANOVA and multiple comparison Tukey’s test (p 0.05). The fracture patternsPublication Open Access ความชุกและปัจจัยที่เชื่อมโยงกับการเกิดอุบัติเหตุต่อฟันแท้ในเด็กที่รับการรักษาที่คลินิกทันตกรรมเด็ก คณะทันตแพทยศาสตร์ มหาวิทยาลัยมหิดล: การศึกษาย้อนหลัง 6 ปี(2012-01) เข็มทอง มิตรกูล; Kemthong Mitrakul; มาลี อรุณากูร; Malee Arunakul; อัฐพงศ์ ฮวกนิล; Atthaphong Huagnil; เจษฎา ธุวไมตรี; Jessada Tuwamaitee; วีรวัฒน์ สุขชม; Weerawat Sukchom; พิชญะ พิมลวงษาภรณ์; Phichaya Phimonwongsaphorn; เข็มทอง มิตรกูล; Kemthong Mitrakul; มหาวิทยาลัยมหิดล. คณะทันตแพทยศาสตร์. ภาควิชาทันตกรรมเด็กหกล้ม (ร้อยละ 68) โดยส่วนมากเกิดที่บ้าน (ร้อยละ 52) อุบัติเหตุต่อฟันมีความชุกสูงสุดคือ การแตกหักของเคลือบฟันและเนื้อฟันที่เผยเนื้อเยื่อในโพรงฟัน (complicated/uncomplicated crown fracture) โดยคิดร้อยละ 55 โดยฟันตัดแท้ซี่กลางบนเป็นซี่ที่ได้รับ... presented the highest TDI prevalence (38%). Falling is the most common cause (68%). Most of the incidence happened at home (52%). Complicated/uncomplicated crown fracture was the most common (55%). Maxillary central incisors were the most affected (75Publication Open Access Incidence of diabetes in Asian population and diabetic bone quality.(2015-05) Mahjabeen Hossain; Dutmanee Seriwatanachai; ดุษมณี เสรีวัฒนาชัย; Mahidol University. Faculty of Dentistry. Department of Oral BiologyDiabetes mellitus (DM) is characterized by high blood glucose levels and divided into two types, type 1diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM). T2DM known as non-insulin dependent diabetes, which is due to insulin resistance and relative deficiency. World Health Organization (WHO) estimated the prevalence of diabetes for all age groups worldwide will be doubled in in 2030. Shockingly, the Bureau of Non Communicable Disease of Thailand found similar trend for Thai population. They claimed that it could be caused by changes of the style of food consumption specially popularity of the western like diets that contain high fat and sugar. Apart from the classical complication of diabetes such as cardiac failure, diabetic nephropathy, peripheral neuropathy, adverse effects associated with bone health become increasing apparently. Despite a number of studies in biological alteration of skeleton affected by chronic hyperglycemic diabetes, the association between DM and osteoporosis remained controversial. This review focused on the incidence of diabetes mellitus in Asian population as well as the metabolic abnormalities of DM potentially affecting bone metabolism, structures and mineral density.