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2006

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Dentistry

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Articles 1 - 26 of 26

Full-Text Articles in Medicine and Health Sciences

Identification Of Porphyromonas Gingivalis From The Pocket With Advanced Periodontitis By Pcr Method, Jintakorn Kuvatanasuchati Sep 2006

Identification Of Porphyromonas Gingivalis From The Pocket With Advanced Periodontitis By Pcr Method, Jintakorn Kuvatanasuchati

Chulalongkorn University Dental Journal

Objective The purpose of this study was to confirm identification of Porphyromonas gingivalis by using the PCR method. Materials and methods Black pigmented Bacteroides (No.1, No.2 and No.3) were isolated from the pockets of three advanced periodontitis patients who came to Periodontal Department of Faculty of Dentistry, Chulalongkorn University for periodontal disease treatment. These bacterias were cultured on brain heart infusion-yeast extract blood (sheep) agar [BHI blood agar] in anaerobic chamber which contained 80% N2, 10% H2 and 10% CO2 at 37°C for 10 days. After these bacterias had already grown. DNA was isolated and amplified for using the PCR …

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Prevalence Of Medical Emergencies In Dental Practices And Emergency Management Preparedness Of Thai Dentists, Jirawan Jirakijja, Boonyarith Sa-Ardaium, Sutha Phattharasupharerk Sep 2006

Prevalence Of Medical Emergencies In Dental Practices And Emergency Management Preparedness Of Thai Dentists, Jirawan Jirakijja, Boonyarith Sa-Ardaium, Sutha Phattharasupharerk

Chulalongkorn University Dental Journal

Objective To study the types and prevalence of medical emergencies occurring in dental practices. The evidence-based data may provide a guidance in which emergencies the dentists should be competent to manage and may contribute to improvement in undergraduate training in the field of emergency care. Materials and methods The descriptive study was conducted by forwarding questionnaires to a sample of 4,000 dentists randomly selected from the Thai Dental Association's registry. The period of this postal survey was from January to February 2005. Results The were 464 returns, a response rate of 11.6%. The most frequently reported emergency was fainting or …

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Effect Of Casein Phosphopeptide - Amorphous Calcium Phosphate On Hardness Of Enamel Eroded By A Cola Drink, Hathaichanok Sukasame, Muratha Panich, Suchit Poolthong Sep 2006

Effect Of Casein Phosphopeptide - Amorphous Calcium Phosphate On Hardness Of Enamel Eroded By A Cola Drink, Hathaichanok Sukasame, Muratha Panich, Suchit Poolthong

Chulalongkorn University Dental Journal

Objective The present study was to compare hardness of enamel, eroded enamel by a Cola drink and remineralized enamel by casein phosphopeptide - amorphous calcium phosphate (CPP-ACP) and to compare remineralization effect of CPP-ACP to that of artificial saliva Materials and methods The specimens were prepared from 11 extracted human premolars, separated in 4 groups to be applied and soked in 1) CPP - ACP 2) artificial saliva 3) CPP - ACP with artificial saliva and 4) deionized water. The Vickers hardness was measured at cutting surface 200 microns away from outer surface. Baseline, eroded and after experiment hardness were …

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Exercising Behavior Of Dental Students, Yuttasak Siangchum, Rachot Klabprathum, Patita Bhuridej Sep 2006

Exercising Behavior Of Dental Students, Yuttasak Siangchum, Rachot Klabprathum, Patita Bhuridej

Chulalongkorn University Dental Journal

Objective (1) to study the exercising behavior of dental students and the relationship between years of study and exercising time and (2) to study the prevalence of neck ache and backache of dental students. Materials and methods A self-administered questionnaire was distributed to a group of dental students of Chulalongkorn University in 2005. A stratified random sampling technique was used. Results One hundred and ninety-four students returned the questionnaire giving a response rate of 100% (57 males and 137 females). Fourteen percent of them reported that they exercise regularly. The sixth-year-student had the highest frequency of exercising (27.3%) while the …

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Implant Replacement Of Bilateral Congenitally Missing Maxillary Lateral Incisors: A Case Report, Wantanee Pruksawangwong Sep 2006

Implant Replacement Of Bilateral Congenitally Missing Maxillary Lateral Incisors: A Case Report, Wantanee Pruksawangwong

Chulalongkorn University Dental Journal

A case of patient with bilateral congenitally missing maxillary lateral incisors which require an interdisciplinary treatment is presented. The orthodontic treatment is for correcting the alignment and axial inclination of the teeth and preparing appropriated space between the maxillary central incisors and canines. Then the implants are albe to restore esthetically and efficiently. This article describes the considerations regarding the proportion of the crowns and implants, the amount of space between the crowns and roots of the adjacent teeth, the quantity and quality of the alveolar bone, the periodontal health, and the orthodontic technique.

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Salivary Flow Rates And Candida Albicans In Subjects With Geographic Tongue, Pornpan Piboonratanakit, Teerawat Chanbanjon, Pakvouttinun Yonokpant, Lakana Luangjarmekorn Sep 2006

Salivary Flow Rates And Candida Albicans In Subjects With Geographic Tongue, Pornpan Piboonratanakit, Teerawat Chanbanjon, Pakvouttinun Yonokpant, Lakana Luangjarmekorn

Chulalongkorn University Dental Journal

Objective To determine characteristics, symptoms and the correlation of salivary flow rates and detection of Candida albicans in subjects with geographic tongue. Materials and methods Analytical and experimental study in 25 and 21 subjects with and without geographic tongue, respectively. Data about characteristics, symptoms and numbers of geographic tongue were compared by descriptive analysis. Unstimulated and stimulated saliva were spitted and C. albicans were detected by Periodic-Acid-Schiff stain and culture. Analytic statistics in umpaired t test was used to compare salivary flow rates. The correlations of symptoms, salivary flow rates and detection of Candida were analyzed by chi-square test. Results …

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Fluoride Promotes Human Pulp Cell Proliferation Through P38 Kinase Pathway, Kritchai Bespinyowong, Prasit Pavasant May 2006

Fluoride Promotes Human Pulp Cell Proliferation Through P38 Kinase Pathway, Kritchai Bespinyowong, Prasit Pavasant

Chulalongkorn University Dental Journal

Objective To study the effects of fluoride on cell proliferation in cultured human pulp cells and investigate the mechanism of fluoride on cell proliferation. Materials and methods Effect of fluoride on cell proliferation was analysed by methylene blue and MTT assay. For determining the intracellular pathway, cells were treated with fluoride in the presence of MAPK inhibitors. The results were statistically analysed by using One-way Analysis of Variance. Results The cytotoxic effect of fluoride on human pulp cells was observed at ≥ 25 ppm (p < 0.05). In contrast, 1 and 10 ppm of fluoride significantly stimulated dental pulp cell proliferation (p < 0.05). The proliferative effect of fluoride may occur through p38 kinase since the inhibitor of p38 kinase inhibited fluoride-induced dental pulp cell proliferation. Conclusion Fluoride concentration higher than 25 ppm has cytotoxic effect on human pulp cells, whereas fluoride at 1 and 10 ppm promote human pulp cell proliferation via p38 kinase.

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Effect Of Mangosteen Pericarp Extract On Cell Viability In Human Gingival Fibroblasts, Kitti Torrungruang, Suchada Chutimaworapan May 2006

Effect Of Mangosteen Pericarp Extract On Cell Viability In Human Gingival Fibroblasts, Kitti Torrungruang, Suchada Chutimaworapan

Chulalongkorn University Dental Journal

Objective The aim of this study was to investigate the toxicity of mangosteen pericarp extract to human gingival fibroblasts in vitro. Materials and methods Human gingival fibroblasts were exposed to mangosteen extract at the concentrations of 0, 100, 200, 400, 800 or 1,600 µg/ml for 24 or 48 hours. The changes in cell viability were observed by inverted phase contrast microscopy and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Results MTT assay showed that mangosteen extract at the concentrations of 200 µg/ml or less did not significantly affect cell viability. The extract at 400 µg/ml did not affect the number of viable cells …

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The Development Of A Pcr Assay For The Detection And Identification Of Candida In Oral Samples, Oranart Matangkasombut, Jarumon Siraprapa, Issara Wongpraparatana May 2006

The Development Of A Pcr Assay For The Detection And Identification Of Candida In Oral Samples, Oranart Matangkasombut, Jarumon Siraprapa, Issara Wongpraparatana

Chulalongkorn University Dental Journal

Objective To 0.07develop a PCR-based method for the detection and identification of Candida albicans and C. glabrata in oral samples, with a comparison of sample preparations by DNA extraction and boiling. Materials and methods Oral rinse samples were collected from 10 healthy volunteers. A portion of the samples was used for cultivation and species identification by growth on Chromogenic Candida agar, chlamydospore formation and biochemical assays. The second portion was subjected to DNA extraction, while the third portion was washed and boiled for 10 minutes. The samples were than tested by PCR using fungal specific primers (ITS) and species specific …

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Microleakage Between Fluoridated And Non-Fluoridated Resin Sealants, Wanna Lowphruckmanee, Thipawan Tharapiwattananon May 2006

Microleakage Between Fluoridated And Non-Fluoridated Resin Sealants, Wanna Lowphruckmanee, Thipawan Tharapiwattananon

Chulalongkorn University Dental Journal

Objective To compare microleakage between fluoridated and non-fluoridated resin sealants. Materials and methods Thirty human upper permanent premolars were randomly assigned to fluoridated resin sealant (Helioseal F) and non-fluoridated resin sealant (Helioseal) groups of 15 each. Sealants were applied and specimens were immersed in distilled water at 37 °C for 24 hours before being subjected to thermocycling (5°-55°C, 30 second dwell time, 500 times). They were immersed in 1% methylene blue solution for 24 hours. The penetrating depth of dye in comparison to the sealant depth was measured by stereomicroscope at 40x magnification and analyzed with T-test at 95% confidence …

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The Comparison Of Shear Bond Strength Between Fluoridated And Non-Fluoridated Resin Sealants, Wanna Lowphruckmanee, Thipawan Tharapiwattananon May 2006

The Comparison Of Shear Bond Strength Between Fluoridated And Non-Fluoridated Resin Sealants, Wanna Lowphruckmanee, Thipawan Tharapiwattananon

Chulalongkorn University Dental Journal

Objective To compare the shear bond strength between fluoridated and non-fluoridated resin sealants. Materials and Methods Fifteen human permanent molars were used. The teeth were sectioned equally in buccolingual direction and randomly assigned to fluoridated resin sealant (Helioseal F) and non-fluoridated resin sealant (Helioseal). After sealants were placed, the specimens were immersed in distilled water at 37 °C for 24 hours. Then, the shear bond strength was tested with the Instron Universal Testing Machine at a crosshead speed of 0.5 millimeter per minute and analyzed using paired T-test at 95 % confidence interval. Results The mean and standard deviation of …

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Enamel Fluoride Retention After Application Of Fluoride Gel: An In Vitro Study, Pichian Angchanpen, Supathra Amatyakul, Chalida Nakalekha, Supachai Kiatsakuntong, Nuingrutai Tuksinmanee May 2006

Enamel Fluoride Retention After Application Of Fluoride Gel: An In Vitro Study, Pichian Angchanpen, Supathra Amatyakul, Chalida Nakalekha, Supachai Kiatsakuntong, Nuingrutai Tuksinmanee

Chulalongkorn University Dental Journal

Objective The preliminary in vitro study was performed to determine the fluoride retention on enamel surface after topical application with 1.23 % acidulated phosphate fluoride (APF) gel. Materials and methods Thirty caries-free human third molars were used in this study. The teeth were cross sectioned at 2 millimeters below cervical line. Five specimens were randomly chosen as a control group. The fluoride content of the enamel surface was measured by using scanning electron microscope and energy dispersive spectroscopy. Other 25 specimens were topically applied with APF gel for 4 minutes and suspended in artificial saliva. Each five randomized specimens were …

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Morphology Of Furcation Roof Of The Mandibular First Molar, Sanutm Sutdhibhisal, Suphot Tamsailom, Sukanya Wanmahinthara, Vipawee Bunruang May 2006

Morphology Of Furcation Roof Of The Mandibular First Molar, Sanutm Sutdhibhisal, Suphot Tamsailom, Sukanya Wanmahinthara, Vipawee Bunruang

Chulalongkorn University Dental Journal

Objective: The purpose of this investigation was to study the morphology of bifurcation roof of mandibular first molars which cause difficulties in periodontal instrumentation and plaque control in teeth with furcation defects. Materials and Methods: One hundred mandibular first molars were randomly selected from a collection of extracted human teeth. These molars were examined for the prevalence three morphologies of bifurcation roof: the intermediate bifurcation ridge, the bifurcation roof concavities and the flat bifurcation roof. Then, the dimensions of bifurcation roof were measured using the Digimatic Indicator by two examiners. Results: Statistical analyses revealed that the intra-examiner and inter-examiner reliabilities …

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Esthetics Of The Adult Thai Women Assessed From Lateral Facial Silhouettes And Photographs: The Reliability Of The Esthetic Score Evaluated By A Panel Of Judges, Paiboon Techalertpaisarn, Somsak Chengprapakorn, Sarilthorn Pongvarapa, Anyanee Sanghirunsook May 2006

Esthetics Of The Adult Thai Women Assessed From Lateral Facial Silhouettes And Photographs: The Reliability Of The Esthetic Score Evaluated By A Panel Of Judges, Paiboon Techalertpaisarn, Somsak Chengprapakorn, Sarilthorn Pongvarapa, Anyanee Sanghirunsook

Chulalongkorn University Dental Journal

Objective The purposes of this study were 1) to verify the reliability of the esthetic scores of the profile of the lateral facial silhouettes and photographs evaluated by a panel of judges 2) to study the correlation between esthetic scores of facial silhouettes and photographs and 3) to compare the esthetic scores among groups with various degrees of facial convexity. Materials and methods Thirty-one facial photographs on the lateral view were taken from adult Thai female participants, who were 20 to 24 years old and had various degrees of facial convexity. All pictures were scanned and saved into JPEG format. …

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Factors Influencing Friction In Orthodontics, Rugrath Sitdhichoke, Sirima Petdachai May 2006

Factors Influencing Friction In Orthodontics, Rugrath Sitdhichoke, Sirima Petdachai

Chulalongkorn University Dental Journal

In fixed orthodontic therapy, tooth must be moved during leveling, alignment or retraction into an extraction area. During these procedures, friction is considered between archwires and brackets in sliding mechanics. Friction must be controlled so that the proper force can be applied to obtain tooth movement, to maintain anchorage and to optimize biologic tissue response. The purpose of this article is to review studies which have been carried out to evaluate the factors that influence frictional resistance. These include brackets, orthodontic wires and biologic factors. These factors should be considered for proper tooth movement in orthodontic treatment.

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Caries Status Of A Minority Group Living In Doi Tung, Patita Bhuridej, Surasit Kietpongsarn, Suntarapong Rapisuwon, Pagaporn Pisarnturakit May 2006

Caries Status Of A Minority Group Living In Doi Tung, Patita Bhuridej, Surasit Kietpongsarn, Suntarapong Rapisuwon, Pagaporn Pisarnturakit

Chulalongkorn University Dental Journal

Objective To study the caries status of a minority group living in Doi Tung, Chiang Rai province in Northern Thailand. Materials and methods In 2000, the Faculty of Dentistry, Chulalongkorn University surveyed the oral health status of 5}958 people living in Doi Tung area. The World Health Organization (1997) caries criteria were used. The caries data of 2,727 subjects aged 3, 5-6, 12, 35-44, and 60 and older were analyzed and presented in this study. Results Sixty-eight percent of 3-year-old children (n=155) had dental caries and the mean dmft was 3.39 (s.d.=4.07). Six percent of children aged 5-6 (n=341) had …

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Virginia Dental Journal (Vol. 83, No. 4, 2006) Jan 2006

Virginia Dental Journal (Vol. 83, No. 4, 2006)

Virginia Dental Journal

No abstract provided.

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Virginia Dental Journal (Vol. 83, No. 2, 2006) Jan 2006

Virginia Dental Journal (Vol. 83, No. 2, 2006)

Virginia Dental Journal

No abstract provided.

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Virginia Dental Journal (Vol. 83, No. 3, 2006) Jan 2006

Virginia Dental Journal (Vol. 83, No. 3, 2006)

Virginia Dental Journal

No abstract provided.

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Biaxial Flexural Strength Of Restorative Resin Composites, Kamala Kritopakan, Rangsima Sakoolnamarka, Suchit Poolthong Jan 2006

Biaxial Flexural Strength Of Restorative Resin Composites, Kamala Kritopakan, Rangsima Sakoolnamarka, Suchit Poolthong

Chulalongkorn University Dental Journal

Objective To compare the biaxial flexural strengths of five current restorative resin composites which contain different types of filler and resin matrix. Materials and methods Five resin composites, namely Admira (Voco), CeramX (Dentsply), Filtek Supreme translucent (3M ESPE), Filtek Supreme standard (3M ESPE) and Z250 (3M ESPE), were used. Fifteen resin composite discs (13 mm in diameter and 2 mm thick) were prepared for each product and stored in 37 °C distilled water prior to testing. The biaxial flexural tests were conducted using the universal testing machine at a cross head speed of 0.5 mm per minute. The statistical analysis …

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Effect Of Filled-Resin Desensitizing Agent On The Prevention Of Dentin Abrasion Caused By Tooth Brushing, Chompoonuch Sangpanich, Suvapa Prapakamol, Suchit Poolthong Jan 2006

Effect Of Filled-Resin Desensitizing Agent On The Prevention Of Dentin Abrasion Caused By Tooth Brushing, Chompoonuch Sangpanich, Suvapa Prapakamol, Suchit Poolthong

Chulalongkorn University Dental Journal

Objective The purpose of this in vitro study was to evaluate the effect of filled-resin desensitizing agent on the prevention of dentin abrasion caused by tooth brushing. Materials and methods Forty root dentin segments were prepared from 40 extracted premolar teeth by using diamond bur cut and cementum layer removed. The 40 root dentin segments were treated with radiation and kept until use, and randomly assigned to 4 groups according to the agents treated the dentin surfaces. Group 1 was treated with filled-resin agent Seal&Protect™, group 2 with unfilled-resin Seal&Protect™ agent which had the same composition like group 1 but …

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Microbiological And Clinical Changes After Utilizing Minitip Curet-Like Ultrasonic Tips, Ichaya Yiemwattana Jan 2006

Microbiological And Clinical Changes After Utilizing Minitip Curet-Like Ultrasonic Tips, Ichaya Yiemwattana

Chulalongkorn University Dental Journal

Objective To evaluate the changes in subgingival bacterial counts and proportions and clinical parameters after subgingival scaling with ultrasonic minitip curet-like tips in the patients with chronic periodontitis. Materials and methods Twelve patients with a total of 97 sited of 3.1-5.0 mm - pocket depth and 43 sites of 5.1 - 7.0 mm - pocket depth participated in this study. Microbiological monitoring was carried out with phase-contrast microscopy and clinical measurements consisting of probing depth (PD) and clinical attachment level (CAL) for 8 weeks. Microbiological assessment of the subgingival flora counts was transformed by the logarithm base 10 to stabilize …

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Relationship Between The Widths Of Maxillary Anterior Teeth, Interalar Width And Inner Canthal Distance, Sittidej Nincharoen Jan 2006

Relationship Between The Widths Of Maxillary Anterior Teeth, Interalar Width And Inner Canthal Distance, Sittidej Nincharoen

Chulalongkorn University Dental Journal

Objective The aim of this descriptive study was to determine the relationship between the width of maxillary anterior teeth, the interalar width and inner canthal distance. The present study was conducted to determine whether the interalar width and inner canthal distance could be used us a guide for selection of proper width of maxillary anterior artificial denture teeth. Since ethnicities of the population studied in the past were Caucasians and Arabians, the present study would like to investigate if this relationship can be suggested in Thai Population or not. Materials and methods A total of 303 Thai subjects, 141 men …

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Virginia Dental Journal (Vol. 83, No. 1, 2006) Jan 2006

Virginia Dental Journal (Vol. 83, No. 1, 2006)

Virginia Dental Journal

No abstract provided.

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A Maxillary Protraction Facemask Therapy, Chawasri Poonvitikul, Sirima Petdachai Jan 2006

A Maxillary Protraction Facemask Therapy, Chawasri Poonvitikul, Sirima Petdachai

Chulalongkorn University Dental Journal

Protraction facemask has been used in the treatment of growing patients with Class III malocclusion derived from maxillary deficiency. Both maxillary complex and upper anterior teeth can be displaced anteriorly by this protraction. Maxillary expansion is advocated to compensate the constriction at the anterior portion of the maxillary during traction even without pretreatment narrow maxilla. A forward and downward protraction force from the anterior portion of maxilla can minimize the counterclockwise rotation of the midface. The facemask therapy may be the most effective for orthopedic change in patients before the peak of puberty. Orthopedic effects require greater forces than do …

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Form And Widths Of The Dental Arch, Saknarin Krabuanrat, Piyarat Apivatanagul Jan 2006

Form And Widths Of The Dental Arch, Saknarin Krabuanrat, Piyarat Apivatanagul

Chulalongkorn University Dental Journal

One of the most important things in orthodontic treatment planning is to establish the dental arch form, which consists of anteroposterior position of the incisors and dental arch widths: intercanine width and intermolar width. Today, it is known that only a limited amount of posterior dental arch width change is possible, and a change in the region of the canines is particularly limited. In this article, basic knowledge of form and widths of dental arch were reviewed. Treatment considerations to determine stability of the form and widths of dental arch were also mentioned.

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