Open Access. Powered by Scholars. Published by Universities.®

Medicine and Health Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

2001

Journal

Chulalongkorn University Dental Journal

Articles 1 - 24 of 24

Full-Text Articles in Medicine and Health Sciences

Effect Of Surface Treatments On Shear Bond Strength Of High Leucite Content Porcelain And Aluminous Porcelain, Kanchana Kanchanatawewat, Boonlert Kukiattrakoon Sep 2001

Effect Of Surface Treatments On Shear Bond Strength Of High Leucite Content Porcelain And Aluminous Porcelain, Kanchana Kanchanatawewat, Boonlert Kukiattrakoon

Chulalongkorn University Dental Journal

Objective The purpose of this study was to evaluate the shear bond strength (SBS) of high leucite content porcelain (EMP) bonded to aluminous porcelain (AP) using resin cement under different surface treatments. Materials and methods 300 EMP discs, having a diameter of 5.5 mm and a width of 1 mm, were divided into 5 types, (60 discs/type); Type A no surface treatment to be served as a control group; Type B polished with Sic paper; Type C ground with a coarse diamond bur; Type D etched with HF acid for 5 min and Type E etched with APF gel for …

Go to article

A Study Of The Relationship Between Different Median Reference Points On The Upper Dental Cast And The Upper Dental Midline, Porntip Chiewcharat, Niramol Chamnannidiadha, Chaiyasri Thunpithayakul, Teera Thammawasi, Piyarat Chalermsuksunt Sep 2001

A Study Of The Relationship Between Different Median Reference Points On The Upper Dental Cast And The Upper Dental Midline, Porntip Chiewcharat, Niramol Chamnannidiadha, Chaiyasri Thunpithayakul, Teera Thammawasi, Piyarat Chalermsuksunt

Chulalongkorn University Dental Journal

Objective The purpose of this study was to compare the relationship between upper dental midline and other reference positions, namely, frenum, incisive papilla, and midpoint of the second rugae. Materials and methods The investigation was conducted on 60 upper dental casts which were selected by purposive sampling method according to the required criteria that was deviation of upper dental midline from facial midline based on histories of patients who came for orthodontic treatment at the Department of Orthodontics, Faculty of Dentistry, Chulalongkorn University. By fixing the 4 positions mentioned above and using the posterior part of the midpalatal raphe as …

Go to article

Arch Length Required For Curve Of Spee Leveling, Porntip Chiewcharat, Korapin Mahatumarat, Kanya Hirunpanupong, Thosaporn Piyakulvorawat, Roongaroon Apinan Sep 2001

Arch Length Required For Curve Of Spee Leveling, Porntip Chiewcharat, Korapin Mahatumarat, Kanya Hirunpanupong, Thosaporn Piyakulvorawat, Roongaroon Apinan

Chulalongkorn University Dental Journal

Objective The objective of this study was to find the relationship between the arch length required and the depth of the curve of Spee in the leveling of the curve of Spee. Material and methods The study was performed in dentoform by setting the mandibular teeth in order to increase the depth of curve of Spee from normal to 11 levels which ranged from 1.55 to 6.95 millimetres. The actual arch length in each level was measured and was subtracted from the sum of mesiodistal width of teeth in mandibular arch. The result was the arch length required for each …

Go to article

Management Of Infectious Waste By Dental Assistants And Workers In Dental Clinics, Division Of Dental Health, Department Of Health, Bangkok Metropolitan Administration, Kornkamol Luksila Sep 2001

Management Of Infectious Waste By Dental Assistants And Workers In Dental Clinics, Division Of Dental Health, Department Of Health, Bangkok Metropolitan Administration, Kornkamol Luksila

Chulalongkorn University Dental Journal

Objective To study the management of infectious waste by dental assistants and workers in dental clinics. This management included the separation, collection, transportation of infectious waste, realizing the harmful risk related to the study groups, as well as the sufficiency of the necessary equipment. Materials and methods Interviewed and observed dental assistants and workers who worked in dental clinics, Department of Health, Bangkok Metropolitan Administration. Two study groups composed of 65 dental assistants and 65 workers. The interview from consisted of demographic data, type, and management of infectious waste. Results The results showed that dental assistants and workers had 91.28% …

Go to article

Esthetics For Endodontically Treated Teeth, Bhunusa Tangnamsakul, Prarom Salimee Sep 2001

Esthetics For Endodontically Treated Teeth, Bhunusa Tangnamsakul, Prarom Salimee

Chulalongkorn University Dental Journal

Discolouration of endodontically treated teeth causes noticeable esthetic problems especially in anterior teeth. It may occur as a result from a number of reasons. However, these problems can be prevented or resolved. The purpose of this article is to review techniques and new materials for restoration of endodontically treated teeth. The rationale for their use included bleaching, conventional post and core with metal-ceramic restoration and a new ceramic post and core system with all ceramic crown are discussed.

Go to article

Soft Denture Liners And Tissue Conditioners, Orapin Kaewplung Sep 2001

Soft Denture Liners And Tissue Conditioners, Orapin Kaewplung

Chulalongkorn University Dental Journal

Soft denture liners and tissue conditioners have been used in dental works for several decades. They can be defined as soft, resilient, elastic materials, which from a cushioned layer between the hard denture base and the oral mucosa. They are broadly divided into two groups of materials. The first group is the temporary soft materials which includes tissue conditioners. They are typically based on poly (ethyl methacrylate), an aromatic ester and ethyl alcohol. The second group includes the semipermanent soft lining materials based on silicone rubber or acrylic resin. Their useful properties have been studied and improved in many researches. …

Go to article

Inhibition Of Lactic Acid And Polysaccharide Formation Of Streptococcus Mutans By Tea Extract In Vitro, Kriengkrai Koompirojn, Malee Guay, Wituwan Peawchana, Anocha Suesuwan, Amonrat Ingkasate Sep 2001

Inhibition Of Lactic Acid And Polysaccharide Formation Of Streptococcus Mutans By Tea Extract In Vitro, Kriengkrai Koompirojn, Malee Guay, Wituwan Peawchana, Anocha Suesuwan, Amonrat Ingkasate

Chulalongkorn University Dental Journal

Objective The objective of this study was to determine the effects of tea extract in different concentrations on the inhibition of polysaccharide and lactic acid production of Streptococcus mutans (S. mutans) KPSK-2 in vitro. Material and Methods The Streptococcus mutans were grown in Todd-Hewitt broth containing 4% sucrose and tea extract (4.5 g of tea leaf boiled in 100 ml of distilled water for 15 minutes wad diluted into the following concentrations: 50.0, 33.3, 25.0, 20.0, 16.7 and 14.2% v/v respectively), the samples were incubated under 5% CO2 at 37°C for 48 hours and centrifuged at 3,000 rpm. The supernatant …

Go to article

Dental Treatment Demands In Dental Clinic Of Chulalongkorn University Dental Hospital, Suchada Wattanaburanon, Pongpud Hannoraseth Sep 2001

Dental Treatment Demands In Dental Clinic Of Chulalongkorn University Dental Hospital, Suchada Wattanaburanon, Pongpud Hannoraseth

Chulalongkorn University Dental Journal

Objective The purpose of this study was to investigate the dental treatment demands in Dental Clinic of Chulalongkorn University Dental Hospital in order to have an adequate planning and developing for a better dental service in Dental Clinic of Chulalongkorn University Dental Hospital. Material and methods In this study, data was collected from 11,533 dental records and chief complaint charts of dental patients attending the Dental Clinic of Chulalongkorn University Dental Hospital during July to December 1999. The population were between 13 years to over 60 years old. Results Most of the population were 21-30 years old (28.2%) and dental …

Go to article

Managing Bleeding Disorders During Dental Procedures, Ampaiwan Chuansumrit May 2001

Managing Bleeding Disorders During Dental Procedures, Ampaiwan Chuansumrit

Chulalongkorn University Dental Journal

Dental procedures in patients with bleeding disorder can be successfully performed with the cooperation of dentists and physicians. Hemostatic disorders, involving endothelium, platelet and coagulation factors, induce different manifestations of bleeding episodes. History taking, physical examination and appropriate laboratory testings are essential for identifying the cause of bleeding disorders. Then, specific treatment or replacement therapy can be provided for maintaining the hemostasis during dental procedures. Importantly, the application of dental splints and fibrin glue is a helpful measure in ascertaining the local hemostasis. As a consequence, the replacement therapy can be minimized or omitted. Another considerable aspect is the cost …

Go to article

Comparative Study Of The Physical Properties Of Cu Root Canal Sealer And Proco-Sol® Sealer, Somchai Limsombutanon, Wacharee Peeravanichkul May 2001

Comparative Study Of The Physical Properties Of Cu Root Canal Sealer And Proco-Sol® Sealer, Somchai Limsombutanon, Wacharee Peeravanichkul

Chulalongkorn University Dental Journal

Objective The purpose of this study was to evaluate some physical properties of CU (Chulalongkorn University) root canal sealer and to compare these properties with those of Proco-Sol sealer. Materials and methods CU root canal sealer and Proco-Sol sealer were tested for some physical properties: consistency, setting time, compressive strength, film thickness and solubility. The test methods were based on International Standard ISO 6876 and Revised ANSI/ADA Specification No.30. Results The values determined for the physical properties of CU root canal sealer were as the followings: consistency = 27.57 mm, setting time = 49 h 38 min, compressive strength = …

Go to article

Effect Of Surface Finish On Flexural Strength Of Feldspathic Porcelain, Warangkana Butdee, Kanchana Kanchanatawewat May 2001

Effect Of Surface Finish On Flexural Strength Of Feldspathic Porcelain, Warangkana Butdee, Kanchana Kanchanatawewat

Chulalongkorn University Dental Journal

Objective The aim of this study was to evaluate the effect of surface finish on the flexural strength of feldspathic porcelain. Materials and methods 135 feldspathic porcelain bars were randomly divided into 9 groups, 15 bars per group. The groups consisted of 1) as-fired at 920°C under vacuum; 2) self-glazed at 910°C in air; Group 3-9 were first polished with SiC paper under a wet condition; 3) polished with SiC paper; 4) overglazed at 890°C in air; 5) ground with a coarse and a fine diamond burs under a speed of 120,000 rpm in a wet condition; Group 6-9 were …

Go to article

Impacts Of Copayment In Civil Service Medical Benefits On Dental Care Utilization Among Patients In A Extended-Hour Clinic, Chanchai Hosanguan, Niramon Deeprasertkul, Boossakorn Saison, Benjawan Lerdpunnapongse May 2001

Impacts Of Copayment In Civil Service Medical Benefits On Dental Care Utilization Among Patients In A Extended-Hour Clinic, Chanchai Hosanguan, Niramon Deeprasertkul, Boossakorn Saison, Benjawan Lerdpunnapongse

Chulalongkorn University Dental Journal

Objectives The aim of this research is to evaluate impacts of copayment in civil service medical benefits (CSMB) upon utilization of dental services among patients at the Special Care Clinic. Materials and methods During January-February 1999, patients aged 18-60 years attending the Special Care Dental Clinic, Faculty of Dentistry, Chulalongkorn University were asked to complete 468 questionnaires. 209 patients were in the civil service/enterprise group and 259 patients in the private group. Data analysis was performed to compare dental utilization among these patients. Results Rates of dental utilization and dental expense in 1998 as compared to those in 1997 were …

Go to article

The Survey Of The Patients In The Project Of Dental Aid Services For The Elderly In The Commemoration Of His Majesty The King's Six-Cycle Birthday, Prarom Salimee, Supida Anussorn-Nitisara, Jariya Pornsumalee, Puttiporn Mongkonchart, Varisa Thienthanoo May 2001

The Survey Of The Patients In The Project Of Dental Aid Services For The Elderly In The Commemoration Of His Majesty The King's Six-Cycle Birthday, Prarom Salimee, Supida Anussorn-Nitisara, Jariya Pornsumalee, Puttiporn Mongkonchart, Varisa Thienthanoo

Chulalongkorn University Dental Journal

Objectives The aim of this study is to investigate the chief complaint, clinical finding, personal medical history, and treatment received of the patients in the project of dental aid services in the commemoration of His Majesty The King's Six-Cycle Birthday and the International year for the elderly of Faculty of Dentistry, Chulalongkorn University. The data will be used for the geriatric dentistry division planning. Materials and methods The survey of the 647 patient's records about age, sex, chief complaint, clinical finding, medical history, and treatment in the individual department were recorded and analyzed. Results According to the 647 patient's records …

Go to article

Comparison Of Analgesic Effect Of Lbuprofen And Mefenamic Acid After Surgical Removal Of Impacted 3rd Mola, Wanida Tachawattanawisal, Wanvalee Jarearnkul, Waleratana Sukarawan, Wachareya Thongratanasiri, Wituwan Peawchana, Somchai Sessirisombat May 2001

Comparison Of Analgesic Effect Of Lbuprofen And Mefenamic Acid After Surgical Removal Of Impacted 3rd Mola, Wanida Tachawattanawisal, Wanvalee Jarearnkul, Waleratana Sukarawan, Wachareya Thongratanasiri, Wituwan Peawchana, Somchai Sessirisombat

Chulalongkorn University Dental Journal

Objective To compare the analgesic effect of 2 NSAIDs, ibuprofen and mefenamic acid, after surgical removal of impacted 3rd molar and to compare 2 modes of drug administration between taking the analgesic every 6 hours and when having pain. Materials and methods 40 patients underwent surgical removal of partially erupted impacted lower third molar by the 5th year dental students. After operations the patients were randomly divided into four groups and were prescribed with different analgesics and modes of drug administrations regarding the study design. All of the patients were recalled one week after operations for stitch removal and were …

Go to article

Collagen Type I : Synthesis And Regulation, Pasutha Thunyakitpisal May 2001

Collagen Type I : Synthesis And Regulation, Pasutha Thunyakitpisal

Chulalongkorn University Dental Journal

Type I collagen is the major insoluble fibrous protein that found in bone, dentin, dermis and tendon. In this review, we focus on the mechanisms of type I collagen synthesis and regulation including transcription, translocation of mRNA from nucleus to cytoplasm, translation from nucleotide codon to amino acid as well as post-translation modifications which are necessary for the collagen. The participation of nuclear transcription factors such as Sp1, NF-I, CBF and NP/NMP4 in the COL1A1 transcription is also described in here. The experiments that leaded to the tissue-specific regulation of type I collagen hypothesis are also included in this review. …

Go to article

Plane Of Maxillary Anterior Teeth In A Group Of Thai Dental Students (Frontal View), Janevit Chaopatipharn, Kosit Phensukjai, Chuthinat Intakanok, Sunphat Namano May 2001

Plane Of Maxillary Anterior Teeth In A Group Of Thai Dental Students (Frontal View), Janevit Chaopatipharn, Kosit Phensukjai, Chuthinat Intakanok, Sunphat Namano

Chulalongkorn University Dental Journal

Objective Interpupillary line has been used to guide the arrangement of upper anterior teeth in prosthodontics works. The occlusal plane of upper anterior teeth should be parallel to the interpupillary line. However, in reality, these two planes may not be parallel. This study was designed to investigate the relationship between the occlusal plane of upper anterior teeth and interpupillary line. Materials and methods Sixteen male students and twenty-nine female students who never received orthodontic treatment were participated in this study. By using the digital camera, the photos of their eyes and plane of upper anterior teeth while biting balsar wood …

Go to article

Activation Of Mmp-2 By Bacterial Supernate Cultivated From Periodontal Pockets, Kassara Pattamapun, Thanathorn Tungtong, Thanaphum Osathanon, Woraphat Liwchulaschan, Jintakorn Kuvatanasuchati, Tussanee Darongsuwan, Prasit Pavasant Jan 2001

Activation Of Mmp-2 By Bacterial Supernate Cultivated From Periodontal Pockets, Kassara Pattamapun, Thanathorn Tungtong, Thanaphum Osathanon, Woraphat Liwchulaschan, Jintakorn Kuvatanasuchati, Tussanee Darongsuwan, Prasit Pavasant

Chulalongkorn University Dental Journal

Objective The aim of this study is to focus on the effect of bacterial supernate, cultivated from the patients' periodontal pocket, on the activation of MMP-2 from cultured human gingival fibroblasts. Materials and methods Anaerobic bacteria from periodontal pockets were cultivated for 5 days. Bacterial supernate, either heat inactivated or non-heated, was added into the culture medium of human gingival fibroblasts for 48 hours in serum-free condition. The cytotoxicity of the supernate was assayed by MTT, while the level of MMP-2 activation was measured by gelatin zymography. In another experiment, the effect of bacterial supernate was studied in the presence …

Go to article

Effects Of The Remaining Calcium Hydroxide On Apical Leakage, Mettachit Nawachinda, Peraya Puapichartdumrong Jan 2001

Effects Of The Remaining Calcium Hydroxide On Apical Leakage, Mettachit Nawachinda, Peraya Puapichartdumrong

Chulalongkorn University Dental Journal

Objective The purpose of this study was to study effects of Ca (OH)2 dressings on apical leakage at 30 and 60 days after the root canal was filled. Materials and methods An in vitro investigation was performed using a dye leakage and clearing method. Extracted human teeth with single and straight root canal (n=60) were instrumented to #40 of master apical file and flared to #60. Having been randomly divided into two groups for Ca(OH)2-and non-dressing purposes, the teeth were subsequently selected for the period after obturation in association with 30 or 60 days. After that, the specimens were placed …

Go to article

Caries Prevalence Of 2-12 Year Old Children At The Department Of Pediatric Dentistry, Chulalongkorn University From 1994-1999, Wacharaporn Tasachan, Pariyakamon Taworanun Jan 2001

Caries Prevalence Of 2-12 Year Old Children At The Department Of Pediatric Dentistry, Chulalongkorn University From 1994-1999, Wacharaporn Tasachan, Pariyakamon Taworanun

Chulalongkorn University Dental Journal

Objective To study average dmf, DMF in different age groups and sexes of children registered at the Department of Pediatric Dentistry, Faculty of Dentistry, Chulalongkorn University in 1994-1999, and compare to the results from a study done in 1993. Materials and methods Retrospective study of clinical examination records and bitewing radiographs of 1,650 children, age 2-12 years, examined at the Department of Pediatric Dentistry, Faculty of Dentistry, Chulalongkorn University in 1994-1999. The average dmft, dmfs, DMFT and DMFS in both sexes were calculated and statistical analyzed by using t-test. Results From 1994 to 1999, the average dmft and dmfs of …

Go to article

Evaluation Of Thai Dental Students' Attitudes Toward Elderly Patients, Chanchai Hosanguan Jan 2001

Evaluation Of Thai Dental Students' Attitudes Toward Elderly Patients, Chanchai Hosanguan

Chulalongkorn University Dental Journal

Objective The purposes of this investigation were to evaluate dental students' attitudes toward the elderly and to develop measuring instruments for these attitudes. Materials and methods Self-administered questionnaires were obtained from 188 first year dental students and 138 sixth year dental students from 4 dental schools. Attitudes toward the elderly were measured on (1) stereotypes, (2) affect toward the elderly in general, (3) affect toward the elderly patients, and (4) behavioral intention. Factor analysis was employed to analyze measurement properties of attitude indexes. Comparisons of attitudes between student groups were performed with non-parametric tests. Results Thai dental students hold positive …

Go to article

The Study Of Peel Resistance Of Silicone Elastomer Bonded With Polyurethane Sheet Fabricated From Liquid Polyurethane When Using 3 Primers, Piyawat Phankosol, Niyom Thamrongananskul, Jaruwan Jirathongcomshote, Nirin Ratanapob, Sirima Limchaichana Jan 2001

The Study Of Peel Resistance Of Silicone Elastomer Bonded With Polyurethane Sheet Fabricated From Liquid Polyurethane When Using 3 Primers, Piyawat Phankosol, Niyom Thamrongananskul, Jaruwan Jirathongcomshote, Nirin Ratanapob, Sirima Limchaichana

Chulalongkorn University Dental Journal

Objective The purpose of this study was to determine the peel resistance of silicone elastomer bonded with polyurethane sheet fabricated from liquid polyurethane when using 3 primers: 1205, S-2260 and A-4040. Materials and methods The liquid polyurethane was fabricated into sheet by pouring in gypsum mold. The experiment was divided into 4 groups, each group was 30 specimens, three experimental groups and one control group. Each experimental group was treated with primer : 1205, S-2260 and A-4040, respectively. Triacetoxy silane silicone elastomer was packed. Lloyd universal testing machine (Model LR 10 K) was used for measuring peel resistance according to …

Go to article

Different Surface Topography Of Dental Implant, Viritpon Srimaneepong Jan 2001

Different Surface Topography Of Dental Implant, Viritpon Srimaneepong

Chulalongkorn University Dental Journal

In order to achieve the osseointegration, the surface of endosseous is considered as one factor determining the formation of bone-implant interface. Commercially pure (Cp) titanium implant has been widely to restore the missing teeth, however, nowadays there are many different surface treated implants in dentistry. They have shown the various clinical success and failure rates. Although the high success rate of using Cp machined titanium umplant is well documented, the rough surface implant has also been shown to have a crucial role on the osseointegration. Rough surface can be created by coating with hydroxyapatite, titanium or by removing titanium surface …

Go to article

Technique In Restoring Short Teeth, Suvit Limpattamapanee, Issarawan Boonsiri Jan 2001

Technique In Restoring Short Teeth, Suvit Limpattamapanee, Issarawan Boonsiri

Chulalongkorn University Dental Journal

The most common cause of short clinical crown affecting multiple teeth is severe toothwear. Decision making and treatment planning are complex. This article provides etiologies of short teeth, location of attrition teeth in the mouth, severity of toothwear, and the factors effecting the treatment planning include guidline for selection methods of restoring short teeth by increasing retention for instances grooves, slots, crown lengthening with perio-surgery, orthodontic extrusion, raising vertical dimension by fixed or removable prosthesis. This article also describes the suitable treatment consideration for each patient.

Go to article

All-Ceramic Restoration, Chalermpol Leevailoj Jan 2001

All-Ceramic Restoration, Chalermpol Leevailoj

Chulalongkorn University Dental Journal

Recently porcelains or ceramics have been developed to be used as the all-ceramic restorations. The strength and esthetic of the ceramics were improved to match the natural human dentition. This review describes the methods used to improve the quality of porcelain and includes the guideline for clinicians to choose the proper ceramic system and luting cement for dental works.

Go to article