All issues
Volume 44 (2006)
- Issue 5 Pages 641-
- Issue 4 Pages 493-
- Issue 3 Pages 331-
- Issue 2 Pages 161-
- Issue 1 Pages 1-
Volume 44, Issue 3
Displaying 1-19 of 19 articles from this issue
- |<
- <
- 1
- >
- >|
-
Tomonori Hoshino2006 Volume 44 Issue 3 Pages 331-336
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSViridans streptococci, including the anginosus, mitis, mutans, and salivarius groups, dominate oral microflora that consists of more than 300 species of bacteria, and are considered to be the principal indigenous microbiota in the human oral cavity. Among these, mutans streptococci are closely associated with the development of human dental caries. Mitis group streptococci, which have been identified in pre-dentate infants, are associated with infectious endocarditis and sepsis. Since dental plaque, which is biofilm in human oral cavity, is a mass of these bacteria, it is thought to be a hotbed of the above diseases. It is meaningful to resolve the mechanism of dental plaque formation and to identify the organism in dental plaque. Therefore, we have studied about the molecular analyses of glucosyltransferase, which plays an important role in the formation of plaque biofilm, and the phylogenetic analyses of streptococcal gtf genes,16 S-23 S rRNA intergenic spacer genes, and four housekeeping genes. Then from these results, we have developed the molecular and phylogenetic methods to detect and identify these streptococci, rapidly and precisely.View full abstractDownload PDF (1677K) -
[in Japanese]2006 Volume 44 Issue 3 Pages 337-340
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSDownload PDF (568K) -
[in Japanese]2006 Volume 44 Issue 3 Pages 341-346
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSDownload PDF (1728K) -
Rie Niji, Kenji Arita, Mizuho Nishino2006 Volume 44 Issue 3 Pages 347-354
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to evaluate the age of the mother as a risk factor in caries incidence in the three year old children. The subjects were 870 pairs of a mother and her first child. Caries incidence in children was examined at three and a half years of age.
The factors analyzed with logistic model analysis were as follows: the age of the mother at the birth of her first child: 22 years or less,23 years or more; frequency of between meals: 4 times or more per day,3 times,2 times,1 time or none; regularity of between meals: irregular, regular; tooth brushing by mother: none or sometimes, every day; living with grandparent(s): yes, no; working of mother: yes, no.
The results were as follows.
The risk factors showing significant correlation with the caries incidence were the age of the mother being 22 years or less (ratio of odds: 2.451, CI95: 1.623-3.702, p<0.001); frequency of between meals being 4 times or more (ratio of odds: 2.638, CI95: 1.314-5.296, p=0.006) and living with grandparent (s) (ratio of odds: 1.352, CI95: 1.024-1.786, p=0.034).
This study suggests that with the age of the mother of 22 years or less there a risk factor of caries incidence in 3 year old children.View full abstractDownload PDF (1330K) -
Using a Longitudinal Lateral CephalogramsKazuhisa Okamoto2006 Volume 44 Issue 3 Pages 355-363
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe author was of the opinion that knowing the positions of the upper and first molars in children with normal occlusion in accordance with the increase in age, as well as the craniofacial and first molar patterns of development would be of considerable value to pediatric dental clinics.
The positions of the upper and lower first molars, as well as their patterns of development of Canadian Caucasian boys and girls aged 6,9,12 and 16 having normal occlusion, were measured with a longitudinal lateral cephalogram.
The position of the upper first molar with respect to the S-N distance, and the PNS-ANS distance, as well as the position of the first lower molar the respect to the G-Me distance and their growth patterns were compared on the lateral cephalogram the respect to the gender of the children. The results showed that between the males and females there were differences in the growth pattern of the first upper molar with respect to the craniofacial autro-posterior size with the increase in age but for each age group the position of the lower first molar with respect to the craniofacial antro-posterior size was in a very narrow range.View full abstractDownload PDF (1323K) -
Naoto Kijima, Motohiro Kikuchi, Nobuyuki Seki, Yosuke Kuroki, Daisuke ...2006 Volume 44 Issue 3 Pages 364-370
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe limited cone beam X-ray CT (3 DX) is an epoch-making device that brings three dimensional analysis to the field of odontology using computed topography. The information obtained from this device, however, is the 2 dimensional fault image roentgenopraphic information but the immediate three dimensional data could not be obtained.
The authors therefore developed an application which was able to convert information from the 3 DX and construct general purpose 3 dimensional data of the radiated object. When the accuracy was measured using a large cube (all sides being 20 mm) and a small cube (all sides being 10 mm) for measurement, the following results were obtained.
1. No significant difference was found in actual length and the length that the application had calculated was roughly within a discrepancy of 0.25 mm.
2. No significant difference was found in the margin of error based on the size of the cube.
As a result, this application was able to convert the 3 DX data into 3 dimensional data with good accuracy. Due to this, it is now possible to grasp the three dimensional analysis of the radiated object and the image which had been difficult with the conventional 3 DX. It was suggested that this will further increase the utility of the 3 DX.View full abstractDownload PDF (4254K) -
Mari Tanaka, Juan Han2006 Volume 44 Issue 3 Pages 371-378
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSDuring embryo development in mammals, the primary eyelids grow and flatten over the eyes and temporarily fuse in a closed position. Failure of this normal developmental process in mice leads to the defect of open eyelid at birth. The purpose of this study was to investigate the frequency of open eyelid occurring spontaneously and in cortisone-treated mice during pregnancy between the A/WySn and C3H/He inbred mice. METHODS: A/WySn and C3H/He mice were used. Pregnant mice were injected on days 11 through 14 of gestation with 100 mg of cortisone per kg of body weight. As a control group pregnant mice were not treated with cortisone. The frequency of open eyelid was noted among embryos that attained at least Day 18 of development. RESULTS: The frequency of mice treated with cortisone and which developed open eyelid (21.9%) was significantly higher than that in mice where this occurred spontaneously (11.6%) in the A/WySn strain. In the C3H/He mice, open eyelid was not found to occur spontaneously or in those treated with cortisone. In contrast, in A/WySn mice, the frequency of open eyelid alone showed no difference when occurring spontaneously (10.8%) or in mice treated with cortisone (8.1%). However, the frequency of open eyelid and cleft palate occurring together in mice treated with cortisone was significantly higher than in instances when these occurred spontaneously. CONCLUSION: The results suggested that the occurrence of open eyelid appears to be a complex genetic trait, and the A/WySn mice may serve as a model for the genetic analysis of open eyelid thought genetic crosses between the A/WySn and C3H/He mice.View full abstractDownload PDF (2468K) -
Naoyuki Kariya, Seishi Matsumura, Omar M M Rodis, Ying Ji, Xiaopei Du, ...2006 Volume 44 Issue 3 Pages 379-384
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSProper oral health care is important for the prevention of oral disease, and it is necessary to teach appropriate oral hygiene as early as possible.
Our purpose was to evaluate the effectiveness of an S. mutans measurement kit known as the“Oral Tester (Mutans)”.
52 4-5 year-old nursery school children in Okayama participated in this study. Plaque sampling and analysis using the“Cariostat”and“Oral Tester (Mutans)”was performed by one dentist. The PCR method from prepared DNA was performed and confirmed by electrophoresis.
PCR detection of S. mutans in the high-risk samples of the Oral Tester was 95.5% while it was 50% in the low risk samples.
A significant difference (P<0.001) was seen between the high and low results of The Oral Tester (Mutans) and for the PCR detection of S. mutans.
PCR detection of S. mutans in the high-risk samples of the Cariostat was 87.1% while it was 42.9% in the low-risk samples.
A significant difference (P<0.01) was seen between the high and low results of Cariostat and the PCR detection of S. mutans.
PCR detection of S. sobrinus in the high-risk samples of the Oral Tester (Mutans) was 36.4%while it was 20% in the low risk samples.
PCR detection of S. sobrinus in the high-risk samples of Cariostat was 35.5% while it was 14.3%in the low-risk samples.
There was no statistical significance seen between the high and low risk samples for both the Oral Tester (Mutans) and Cariostat.
The specificity of the Oral Tester (Mutans) in detecting the presence of S. mutans was confirmed by PCR detection and it is therefore useful for caries risk assessment.View full abstractDownload PDF (851K) -
Yousuke Ga, Wataru Motokawa, Koji Miyazaki2006 Volume 44 Issue 3 Pages 385-395
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe aim of this study was to quantify, in vitro, the formation of calcium fluoride after the application of six acid phosphate fluoride solutions (APF solution) with various pH (2.0,2.5,3.0,3.5,4.0,5.0) and to evaluate a remineralization of the subsurface lesion of bovine enamel treated with those APF solutions using the quantitative light fluorescence method (QLF). The Quantity of alkali-soluble fluoride (CaF2) on the enamel surface increased through raising the acidity of APF solution and the largest one was an APF solution with pH 2.5. A uniform surface coating consisting of the small globules (less than 0.1μm in diameter) of calcium fluoride overlying the bovine enamel was observed after treatment with APF solution of pH 2.5. The surface morphology however changed becoming coarse and a quantity of fluoride decreased with the lowering of the acidity of the APF solution. A dispersion of fluoride into the subsurface lesion of the enamel increased through raising the acidity of the APF solution. After treatment with APF solution with pH 2.5 a large amount of fluoride dispersed into a depth of 30-40μm from the enamel surface. The highest recovery of the mineral of the surface layer occurred in APF solution with pH 2.5 followed by APF solution with pH 3.5; the least recovery was in the control (without APF solution).View full abstractDownload PDF (3542K) -
Kozue Miura, Hisami Nakae, Junji Suzuki, Miyuki Nakaoka, Hideaki Amano ...2006 Volume 44 Issue 3 Pages 396-402
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe aim of the present study was to clarify the status of dental treatment for mentally disabled patients in the Department of Pediatric Dentistry, Hiroshima University Hospital from April 2004 to March 2005.
One hundred and forty five male and sixty female (205 patients in total) who had mentally disabilities underwent dental treatment during the test period. The percent of mentally disabled patients among the total number of patients in our clinic was 8.6. Those in the age group between 7 and 12years of age were the most numerous (40.5%). Although half of patients had come to our clinic for less than 5 years,22.4% of The patients had continuously visited for more than 16 years. Each patient visited the clinic 5.4 times on average during this test period. The most common diseases of the patients were autism (41.5% of all patients), mental retardation (35.1%), and then Down syndrome (9.3%). Half of patients had been restrained at least once during dental treatment during the test period. The patients were restrained with hands of the assistant (55.8%), restrainer® (31.7%) or a bath towel (10.6%). The most common dental treatments were scaling and cavity filling.View full abstractDownload PDF (961K) -
An Investigatioinn to Actual Statuso f the Disabled Children(1997-2001)Yukiko Muneta, Keiko Shioya, Kumiko Kobari, Noboru Yamashita, Mitsuko ...2006 Volume 44 Issue 3 Pages 403-408
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSWe investigated the actual status of outpatients at the Pediatric Dental Clinic of Showa University Dental Hospital.
In this survey the subjects were 1,010 disabled children who had first visited the Dental Hospital between January 1997 to December 2001.
The results were as follows:
1. The proportion of disabled children was 24.9% of all new patients who had visited our department during the 5 year period.
2. They were classified into 4 groups according to their disorder. There were 23.7% children with physically or mentally handicaps,7.7% children with systemic disease,58.6% children with cleft lip and palate and 10.0% children with severe allergy.
3. As for the age of the subjects at the first visit,1 year old and 2 year old children represented the largest percentage (53.5%). Their average age was 4 years 5 months.
4. The percentage of the outpatients who lived in the area around our Hospital was 77%, except for children with cleft lip and palate.
5. Concerning chief complaints, most outpatients came for caries treatment, care of malocclusion and oral examination.
6. General anesthesia was selected for children with a high df and DF score.View full abstractDownload PDF (1011K) -
Hiroki Matumoto, Hatsue Kakuta, Rikako Harada, Junko Akamatsu, Reiko A ...2006 Volume 44 Issue 3 Pages 409-415
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSIn order to inform the patients about the importance of t he recall system in dentistry and to have the system accepted by numerous patients, and additionally with the purpose of getting to know the awareness of recall system,271 guardians of child patients were surveyed using the questionnaire method. The following results were obtained.
1. 92% of the guardians was satisfied with our recall system.
2. The interval of recall in our clinic was two to three months, which was the interval considered suitable by the guardians.
3. Toothbrushing instruction in our clinic was evaluated as being easy to understand by about 90% of the guardians, and seemed to be mastered sufficiently.
4. Major expectations the guardians had for the recall system were“prevention of tooth decay”and“dental checkups”. The degree of expectation was low for“toothbrushing instruction”and“on eating habits instruction.”
For the oral health, home care such as regular eating habits and regular oral hygiene is important in addition to periodical professional dental care. It will now be necessary, for us to try to inform the patients about the importance of periodical oral care and to raise the awareness of the need for further dental health.View full abstractDownload PDF (1191K) -
Kensuke Matsune, Katsumi Miyoshi, Kiyoshi Arai, Isao Shibuya, Yuriko T ...2006 Volume 44 Issue 3 Pages 416-421
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSDental treatment with the laser leads to less emotional st ress than when using an air turbine or an electric motor. The purpose of this study was to evaluate the selective removal of carious regions using an Nd-YAG laser. It was suggested that selective removal of the carious region was possible with a 300mJ or 600mJ Nd YAG laser beam with an irradiation angle of 90°. As for the radiation conditions, radiation was conducted under the conditions of a fiber diameter of 600μ(silica, no finishing),1 second (5 pps), and 300 mJ or 600 mJ, and liquid titanium oxide solution of different density was inserted between the tooth and the fiber. No significant discrepancy in removal of dentin was seen due to a change in the density of the titanium oxide. When conducting laser radiation of 300 mJ and 600 mJ using a titanium oxide solution, it was found possible to remove the carious region selectively with both. Furthermore, with 300 mJ, in spite of the fact that there was little AgF effect, when irradiating with 600 mJ with an output which had become high, it was found that a large amount of the AgF section which had reacted with the healthy dentin could also possibly be removed. What this means is that when dentin is removed in daily clinical practice, in cases in which AgF is used on the surface of the tooth, and the output of the laser is high, the ability to remove the carious region selectively decreases, and a large amount of healthy dentin could also possibly be removed.View full abstractDownload PDF (2523K) -
Tatsuo Matsubara, Yoshiaki Ono, Hisano Osada, Makiko Sawada, Chiho Kub ...2006 Volume 44 Issue 3 Pages 422-427
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSEvaluation of the masticatory function in children is important in pediatric dentistry to diagnose whether a patient has any dysfunction in mastication. Newly developed color changeable chewing gum has been used for the evaluation of masticatory performance in adults. The purpose of the present study was to determine the optimum time and adequate volume of the gum for chewing for the evaluation of mastication in children. Forty children (6.8±1.8yrs) and ten adults (27.8±2.0yrs) were selected as the subjects. The subjects were instructed to chew two different volumes (full volume and half volume) of color changeable chewing gum for four different time periods (30 sec,1 min,1.5 min and 2 min). The change in color was measured based on the a* value using a photocolor reader and by referring to the color scale which was printed on the package of the gum. The a* value increased with the increase in chewing time.
The a* v alue did not reach over 20 in the case of chewing using a full volume of the gum, which was not suited for the evaluation of child masticatory performance. On the contrary, the average a* value was 21.0 in the case of chewing using a half volume of the gum for 2 minutes of chewing. The gums were not well-mixed in the case of chewing using a full volume of the gum for 1.5 minutes or less and were not measurable in such cases. Using a half volume of the gum, all of the subjects reached the color scale value of 4 or over after chewing for 2 minutes.
Overall, it is sugg ested that the optimum gum volume and chewing time for children were different than those for adults.View full abstractDownload PDF (1785K) -
Part 3 A Situation for Pacifier Use and Image of ParentsKina Takada, Tomoho Ishikawa, Yasuko Shibuya, Jin Asari, Mitsuko Inoue ...2006 Volume 44 Issue 3 Pages 428-433
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSWe conducted a survey on the usage of the pacifier involving parents of children based on a questionnairea total of 1207 infants 1 y 2 m,2 y 6 m who had a dental check up in the public health office and health center of K city, Tokyo metropolitan for the period from April,2003 to March,2004.
The results were as follows
1. Usage of the pacifier; the most numerous response of each age group was “Not used”. Current users; 26.9% of 1 y 2 m,11.1% of 2 y 6 m.
2. Impetus for use; common responses were “Others” and “Without special reasons”. The common response among retarded users of 2 y 6 m was “Prevention of finger sucking”.
3. As for continued use; common responses from parents of 1 y 2 m were “I want to get him (or her) to stop before long” and “I will wait and watch him (or her) a little longer”, from parents of 2 y 6 m were “I want to get him (or her) to stop before very long”.
4. The reasons for no use; the major reasons of each age group was “I let him (or her) try it, but he (or she) did not use it”.
5. As for stopping use and the impetus for stopping use; “He (or she) got tired of the pacifier” decreased and “I got him (or her) to stop using the pacifier” increased at the higher age levels.
6. The reaction of the infants when stopping the use of the pacifier; at the higher ages, “He (or she) got tired of the pacifier” decreased, while “I made him (or her) stop” increased.
7. Allergic reactions based on the condition of the pacifier; the most numerous response of each age group was “None”. No relationship between using condition of pacifier and allergic reactions was recognized in any age group.View full abstractDownload PDF (950K) -
Part 4 A Situation for Pacifier Use and Occlusal Relation in 2 y 6 m ChildrenTomoho Ishikawa, Kina Takada, Yasuko Shibuya, Jin Asari, Mitsuko Inoue ...2006 Volume 44 Issue 3 Pages 434-438
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSWe conducted a survey on the occlusal relationship and the usage of the pacifier for a parent questionnaire - a total of 459 children 2 y 6 m who had a dental check-up in public health office and center of K city, Tokyo Metropolitan Area during the period from April,2003 to March,2004.
The results were as follows:
1. Open bite cases were obviou sly higher among current users than non users.
2. The incidence of open bite cases was low among past users.
3. The incidence of open bite cases was high among long time users regardless of when they started using the pacifier.
4. Some children who have oral habits were fewer in number among current users than non users.
5. There were very few children who used pacifier and had sucking habits.
6. Open bite cases showed higher rate, wider range, and were the worse case among current users of only the pacifier than users who had only sucking habits.View full abstractDownload PDF (776K) -
Effect on Eruptive Permanent SuccessorsKuniko Ikeda, Yukie Shimada, Akinori Fukumoto, Rei Higashi, Yuko Suzuk ...2006 Volume 44 Issue 3 Pages 439-443
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to investigate the effects that traumatic decidous teeth have on the permanent successors, especially with respect to the time of eruption.
The subjects were 100 children with a total of 157 traumatized decidous central incisors observed from 1992 to 2000 until their permanent successors erupted. Their traumatized decidous central incisors were treated according to the degree of the traumatic injuries. We used medical records and radiographs for the investigation. The controls were the opposite site central incisors and the first molars at the time of eruption.
There was a larger of boys in 1.7: 1 than girls. The average age was 3 years 3 months, while there were numerous 2-4 year olds in the age distribution.7.5% had permanent successors at the time of eruption. We noted in particular, early eruption and delayed eruption of the permanent successors which were found to be injured in children 1 year old in particular. As to the traumatic injuries, we noted that permanent successors showed root fracture inclination and embedment at the time of eruption. Additionally, permanent successors at the time of eruption showed pulp exposure, and crown fracture.
In conclusion, we found that there were no limits to the extent of the traumatic injuries. We suggest that deciduous teeth with traumatic injuries should be observed up to the time when the permanent incisors erupt.View full abstractDownload PDF (707K) -
Mina Hirose, Daisuke Matsumoto, Shoko Yahata, Yoshihiko Maeyama, Yuko ...2006 Volume 44 Issue 3 Pages 444-452
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSWe have revised some of the training concerning basic practices in pediatric dentistry in order to promote the both ability to solve problems as well as communication skills with respect to the patients. We made inquiries among the 96 fourth-year dental students regarding their understanding and satisfaction levels of this basic practice to evaluate the new training after having revised them. More than 80% of the students were able to understand the contents of the textbook and engage in handson practice while grasping each of the following topics; topical application of fluoride, rubber-dam exclusion of moisture, pit and fissure sealant, pulpotomy of primary teeth, preformed crown for primary teeth restoration and drafting of treatment planning including prevention of oral disease. More than 80% of the students participating in the tutorial practice responded positively according to their self-assessment. It seems, however, that there is room for reexamination of this tutorial because 16%of the students were not able to participate in it in this manner. As for acquiring patient management skills, about 30% of students thought that talking to a mannequin assuming it to be a real patient was not useful. We therefore have to have the students change their awarenss concerning basic practice in pediatric dentistry.View full abstractDownload PDF (1441K) -
Keiko Hirano, Sagiri Ogata, Yuka Kimura, Tsutomu Shimono, Tadayuki Tok ...2006 Volume 44 Issue 3 Pages 453-459
Published: June 25, 2006
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSA 16-year girl who had undergone orthodontic treatment with multi brackets Attached, had initial dental caries (white spots) on most of her teeth. All of the cavities were filled and the white spots monitored under a regular recall program. The findings are as follows:
1. The caries activity test (Cariostat®) showed mostly high values during this treatment.
2. The regular period of recall program was undertaken for 470 days. The patient was instructed to use fluoridated dual component dentifrice when brushing at home, while application of fluoride and professional mechanical cleaning was performed at the clinic 17 times.
To evaluate the effect of this treatment, we used the light-in duced fluorescence method.
We recorded the upper right and left central incisors using normal and light-in duced fluorescence photography and analyzed the demineralized areas.
The percentage of the demineralized area o f both teeth gradually decreased.
The average luminance of the demineralized area of both teeth was lowest in first time, and was highest while 247 days after treatment started, finally, the rate was a little lower than the highest.3. We evaluated remineralization of these teeth using normal photography mainly beside the cervical. We checked it more clearly however by using Light-induced fluorescence photography.View full abstractDownload PDF (3558K)
- |<
- <
- 1
- >
- >|