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Volume 42 (2004)
- Issue 5 Pages 615-
- Issue 4 Pages 491-
- Issue 3 Pages 365-
- Issue 2 Pages 183-
- Issue 1 Pages 1-
Volume 42, Issue 3
Displaying 1-15 of 15 articles from this issue
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Akira Suzuki, Maki Minami, Shigeru Watanabe, Tomoyuki Ichikawa, Seika ...2004 Volume 42 Issue 3 Pages 365-374
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSVarious salivary tests have been developed for evaluating the risk of dental caries. The aim of this study was to examine the individual variation of salivary flow rate, pH, buffer capacity, and calcium and phosphate concentrations in unstimulated and stimulated whole saliva and to compare the individual variations with the overall range.
Unstimulated and stimulated whole saliva was collected 4 times a day (9: 00,11: 00,13: 00,17: 00) for 3 days in 5 healthy young adults and was collected at 2: 00 for 3 days from 8 children (5 years of age). The subjects were seated, head down, and saliva was collected for five minutes by being allowed to drip off the lower lip into a weighed container. The subjects were then asked to chew, a stick of sugar-free gum for 10 minutes and 3 minutes saliva samples were collected. CAT 21R was used for measurement of the salivary buffer capacity. Calcium was determined using atomic absorption spectroscopy, phosphate colorimetrically, and pH electrometrically.
The individual range of the salivary flow rate, pH and the buffer capacity varied and covered 50%or more of the overall range. The variation of the calcium and phosphate concentration in stimulated saliva was smaller than those in unstimulated saliva. There was a positive correlation between the salivary flow rate and buffer capacity in all of the adult samples (p<0.05). This suggests that the salivary buffer capacity and the components based on a single salivary analysis do not represent the individual mean level.View full abstractDownload PDF (4803K) -
Masaru Yamazaki2004 Volume 42 Issue 3 Pages 375-382
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe author was interested in the reliability of diagnosing dental caries in the occlusal pit and fissure of premature first and second molars.
The teeth, diagnosed as caries free, CO and C based on inspection and examinatied with an explorer were measured and assessed using the DIAGNOdentTM value, the ratio of mutans streptococci against the total amount of streptococci in the plaque, the salivary volume and salivary buffer, respectively.
The results were as follows.
1. The accuracy of c aries diagnosis with inspection and examination using an explorer under a bright light was generally correct based on the DIAGNOdentTM value and the ratio of mutans streptococci against the total amount of streptococci in the plaque.
2. Positive relationships were found among the DIAGNOdentTM value, the ratio of mutans streptococci against the total amount of streptococci in the plaque.
The results suggested that the accuracy of c aries diagnosis by inspection and examination using an explorer under a bright light was generally correct, and the assessments of the optical and microbiological findings indicated enamel destruction and caries activity were useful for the prevention and instruction concerning early stage of caries in youngster.View full abstractDownload PDF (1291K) -
Takahisa Toyama, Akihito Otsuka, Nobuko Atsumi, Taro Inabe, Kenju Yama ...2004 Volume 42 Issue 3 Pages 383-389
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSA large amount of saliva is secreted in children, tongue movement is intense and the operation a field is narrower in comparison with adults. The rubber-dam dry field technique is necessary because it improves efficiency and can be carried out safely.
There are, however, few clamps marketed for deciduous molar teeth and they do not match the teeth very well. In addition, there are many problems pointing to a need to improve durability and sterilization as well.
Therefore we undertook the experimental production of new rubber-dam clamps for deciduous molar teeth.
Eight kinds of clamps were experimentally produced for the first and second deciduous molars for the upper, lower, left and right teeth. The prototypes were used in clinical practice and were evaluated and improved from the first to the fourth prototypes.
The size of the fourth experimental prod uction clamps was made smaller than the existing model to improve operability inside the mouth. The fitness of the beak improved the effect of moisture exclusion. The width of the beak was adjusted and is able to match the structures of various teeth. The form of the wing made it easy to hold the rubber-dam sheet and remove it after installation.
The result of the questionnaire showed, the 114 cases of the final trial product ion were found to be as good as or better than the existing model, with “stability” at 90.4%, “total balance” 95.6%, “form of the wing” 99.1% and “fitness of the beak” 93.9%.View full abstractDownload PDF (3008K) -
Keiichiro Tsujino, Kaori Kaneko, Akiko Tsubokura, Kiyoshi Mochizuki, Y ...2004 Volume 42 Issue 3 Pages 390-396
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSIt is well known that causes of permanent tooth los s are periodontal disease and dental caries. However, it is difficult to identify causes of deciduous tooth loss, because of the shedding of the deciduous teeth with growth. Clarify causes of early loss of the deciduous teeth is useful for the longterm oral health process for pedodontic patients, and for instructing the patients and their guardians. In this study,105 pedodontic patients with clear reasons for deciduous tooth extraction other than tooth exchange were selected among patients who had undergone deciduous tooth extraction at the Department of Pediatric Dentistry in the Tokyo Dental College Suidobashi Hospital since April 2000for 3 years and 3 mouths, and their age, gender, tooth types, and causes of tooth extraction were evaluated.
1. There were 172 deciduous teeth (maxillary 125 and mandibular 47 teeth).
2.52 maxillary deciduous central incisors,24 maxillary deciduous lateral incisors, and 22 maxillary deciduous first molars were frequently extracted.
3. The main reason for tooth extraction was dental caries in all tooth types in the maxilla. However, other reasons such as trauma of the deciduous central incisors, and abnormal resorption of the tooth roots of the deciduous second molars due to the ectopic eruption of the permanent first molars were noted in almost the same number of cases as dental caries. In the mandible, all the deciduous incisors in this study were extracted due to trauma, and almost all the deciduous molars were extracted due to dental caries. No extraction of the deciduous canines was performed.
4. Twenty-nine of the 105 pedodontic patients did not visit our department after tooth extraction. The ratio of patients who did not visit our department after tooth extraction was higher among patients who underwent tooth extraction due to dental caries ratio than in patients who underwent tooth extraction due to other reasons.View full abstractDownload PDF (1305K) -
Kaori Kaneko, Akiko Tsubokura, Keiichiro Tsujino, Kiyoshi Mochizuki, Y ...2004 Volume 42 Issue 3 Pages 397-403
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this survey was to investigate the actual status of the treatment for the disabled patients at the pediatric dentistry of a dental college hospital in an urban area. This survey was conducted with respect to the classification of disabilities, the age distribution, the referring institution, the status of the treatment and the behavioral management for disabled patients who visited the outpatient ward of a pediatric dentistry, Tokyo Dental College Suidobashi Hospital from April 2000 to June 2003 for 3 years and 3 mouths. During the period of the survey, the percentage of patients with disabilities in our clinic was 6.0%.
Many of the handicapped c hildren were treatable using usual dental management techniques.
The majority of the disabilities classified involved speech problems and functional mastication with disturbance of cleft lip and palate (40.5%), neuromuscular disease (28.1%) and emotional disturbance (13.0%).
About 50% involved patients 6 to less than 11 years of age.
Most of these patients were referred to from other depa rtment of Suidobashi Hospital, Tokyo Dental College.
A mong the rest of the cases of disabled patients treated, there were many cases that were treated with dental caries treatment (50.8%), dental caries prevention (27.2%), as well as undergoing surgical treatment (14.9%) and orthodontic treatment (6.0%).View full abstractDownload PDF (1158K) -
Kenji Arita, Rie Yamauchi, Remi Fukutome, Masako Tomotake, Kimiko Yama ...2004 Volume 42 Issue 3 Pages 404-411
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to investigate the relationship between the prevalence of dental caries in children three and a half years old and the frequency of consultation of dental health program and the age of the mother at childbirth. Two hundred and fifty pairs of mother and child who had four consultations for children at the ages one and a half years, two years, two and a half years, and three years; and 412 pairs of mother and child who had one consultation for children at the age one and a half years were examined.
The mother and child pairs were sorted into four groups according to the age of the mother at childbirth; G 1: 22 years and below, G 2: 23-28 years, G 3: 29-34 years, and G 4: 35 years and over.
The results were as follows:
1) In children three and a half years old, caries prevalence and mean df score in the four consultation group were 29.6% and 1.14 teeth, and those in the one consultation group were 51.9% and 4.88 teeth, respectively. Caries prevalence and mean df score in the four consultation group were significantly lower than those in the one consultation group (p<0.001).
2) In the one consultation group for children three and a half years old, caries prevalence in G 1 was 75.0% and it was significantly higher than G 2, G 3 and G 4.
3) In the four consultation group for children three and a half years old, caries prevalence and mean df score were not significantly different between each age group of the mother. In each group of the mother, the caries prevalence and mean df score of the four consultation group were lower than those of the one consultation group.
These results suggest that the age of the mother is a caries risk factor, but, a dental health program with frequent consultation including topical application of acidulated phosphate fluoride (APF) decreases the effect of the age of the mother.View full abstractDownload PDF (1365K) -
Akiko Shirasuka, Jin Asari, Mitsuko Inoue, Ryuji Sasa2004 Volume 42 Issue 3 Pages 412-417
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to investigate the incidence and the emergency care of oral trauma of children in nursery schools and kindergartens.
We sent out the questionnaires to 110 nursery schools and kindergartens (irrespective of their being private or public, certified or non-certified) concerning oral trauma occurring in one year from April 2001 to March 2002.
The following results were obtained:
1. Most of the subjects had been injured by “striking against other's head” with the actual location unimportant.
2. The time of injury: In nursery schools, first in frequency was in the morning, second in frequency was between nap time and going home. There was no significant difference among these in kindergartens.3.
97% of the subjects had been given first aid.
4. Most of the subjects in kindergarten washed well and wrapped the teeth which had fallen off in tissue paper.
5.58% of the nursery schools and 80% of the kindergartens had no manual for emergency measures for oral trauma.
6. It is indicated that there was a luck of information concerning the prevention of trauma and concerning first aid or references to dental offices for traumatic accidents occurring in nursery schools and kindergartens.View full abstractDownload PDF (814K) -
Yuko Kitaoka, Yukiko Kori, Kimiko Yamaguchi, Mizuho Nishino2004 Volume 42 Issue 3 Pages 418-429
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to clarify the relationship between the development of occlusal contact and stomatognathic functions in children at different dental age stages.
The subjects were 10 children with normal occlusion. Five children were at Hellman's dental age IIIA (mean age 9.0 years) and 5 children were at IIIC (mean age 12.4 years). All of the subjects had their jaw movement measured at six degrees of freedom using a jaw tracking device and the three dimensional morphology of tooth surface using three dimensional contact digitizer. The data for the jaw movement and the tooth surface morphology corresponded. The occlusal contacts during lateral excursion were analyzed and visualized on a terminal graphic.
The results were as follows:
1. The sagittal angles of the incisal and condylar path during jaw movement increased, and the distance of the working condylar path during lateral excursion significantly decreased.
2. The subjects at stage IIIA had two patterns of occlusal contact during lateral excursion. One had occlusal contacts at the permanent lateral incisor and primary canine, and the other had them at the every tooth on the working side. The subjects at stage IIIC had an occlusal contact pattern which showed contacts at the canine and premolars on the working side.
3. Although subjects at stage HI A with the right-and-left difference in the distance of the working condylar path and occlusal contact area on the working side during lateral excursion was larger than that of subjects at stage IIIC.
These results suggest that permanent teeth, especially canines, play a role in developmental change of condylar movement during lateral excursion.View full abstractDownload PDF (5919K) -
Nonaka Toshiya, Yoshida Masafumi, Iwasaki Makiko, Kijima Naoto, Uchida ...2004 Volume 42 Issue 3 Pages 430-435
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSIn order to clarify the characteristics of the ingestion and swallowing function in patients with serious mental retardation, we investigated the shape of the food in meals for the patients in a welfare institution. The shape of the food was classified into six degrees based on difficulty of deglutition. The shape of the food was also examined with respect to the grade of oral dysfunction and ADL (activity of daily living) quantitatively.
The grade of oral dysfunction was evaluated based on the score changed into dysfunction of the lips and tongue in eating. ADL was evaluated using FIM (functional independence measure).
1) There was a significant positive correlation between the degree of the shape of the food and oral dysfunction.
2) There was a significant positive correlation between the degree of the shape of the food and the FIM items.View full abstractDownload PDF (999K) -
(1) The relationship between the force of lip closure and ageYoshinari Yoshida, Akihito Otsuka, Shiho Sakai, Misato Manabe, Yoshiko ...2004 Volume 42 Issue 3 Pages 436-440
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe authors felt that the effects of forces of lip closure on the oral function of children plays an important role. We therefore examined the effects of forces of lip closure on the oral functions of children from various angles current as of this time. For the purpose of examining forces of lip closure at various ages, which would become the basis of our study, we selected as our subjects elementary school students and kindergarten children in the city of Nagoya. There were a total of 621 subjects, ranging from 3 to 12 years of age, composed of 316 males, and 305 females. What follows are the results of measuring the forces of lip closure using the LIP DE CUM®(CosmIon struments).
1. No significant differences in forces of lip closure were found between the males and females.
2. As the age increased, forces of lip closure also showed an increase. Significant differences were found in the 3-4 year old,4-5 year old, and 6-7 year old age brackets. No significant differences were found for the other ages.View full abstractDownload PDF (1494K) -
(2) The relationship between the force of lip closure and occlusionToshiaki Ono, Yoshinari Yoshida, Akihito Otsuka, Tetsuya Aoyama, Norih ...2004 Volume 42 Issue 3 Pages 441-446
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe aim of the present study was to investigate the relationship between the forces of the lip closure and the occlusion through the process of dentition. The subjects in this study were 560 nursery school and primary school children from II A to IV A according to Hellman's dental stage. The forces of the lip closure were measured using the “LIP DE CUM®”. The following results were obtained:
1. The forces of the lip closure were related to the Hellman's dental stage and the occlusion.
2. The forces of the lip closure increased with the dental stage.
3. The forces of the lip closure with the anterior openbite and the maxillary protrusion was significantly lower than the normal occlusion and another malocclusion after III A.
4. The forces of the lip closure with the anterior openbite showed almost no increase after III A.
5. A close relationship was observed between the morphology of the dentition and the function of the muscle in orally after the eruption of the anterior permanent teeth.View full abstractDownload PDF (1651K) -
Yoshihiro Hayashi, Akira Katakura, Mika Kurosu, Kenichi Matsuzaka, Mas ...2004 Volume 42 Issue 3 Pages 447-452
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSWe experienced a rare case of calcifying odontogenic cyst (COC) associated with odontoma in a 6year-old boy. The COC appeared in the deciduous molar region of the mandible. Radiographic findings showed that the cystic radiolucent area was observed being surrounded by a compound odontoma-like radiopaque structure.
The COC was surgically removed together with the odontoma-like mass.
Through histopathological examination, we observed the appearance of ghost cells, well calcified tissues on the epithelial layer of the cyst wall in this cyst and also observed compound odontoma.
The COC is thought to recur sometimes, and even after removal, possibly variously harmful to the normal growth and development of the dental arch and occlusion, after eruption of teeth. From the oral surgical and pediatric dental points of view, we consider that we need to extend the follow up of this case over an extended period.View full abstractDownload PDF (4877K) -
Tomomi Kawakami, Saori Sugiyama, Hiroyuki Karibe, Ayako Nara, Kiyokazu ...2004 Volume 42 Issue 3 Pages 453-457
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThis report describes two cases of foreign bodies in incomplete primary dentitions.
Children were referred, by dentists, for consultation concerning the abnormal shapes of their teeth. The first case was an 1 year 7 months old girl. The mandibular primary central incisors were slightly mobile while gingival inflammation and recessions were observed. The second case was an 1 year 9months old boy. Clinical examinations revealed that the left deciduous maxillary incisor was slightly mobile and some gingival inflammation was evident.
Both cases were diagnosed as having impacting foreign bodies around the teeth, because there was mobility on palpation of the substances and not evidences of radiopaque materials. The prognoses after removing the foreign bodies were good. The objects were small plastic tubes, and identified as some pieces of polyethylene tubes in pillows which their parents used.
When dentists find changes of periodontal tissues caused by unknown factors, they should pay attention to the possible existence of an intraoral foreign body. It is also necessary to inform parents and the community about dental accidents which may occur when children swallow a foreign body. Manufacturers should more seriously consider the prevention of accidents and design products accordingly.View full abstractDownload PDF (3316K) -
Makoto Saito, Mitsuro Tanaka, Zenzo Miwa, Yuzo Takagi, Hisashi Suzuki2004 Volume 42 Issue 3 Pages 458-463
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSA case of temporomandibular joint disorders in a young child with the oral habit of mandibular protrusion, was reported. A 4 year 2 month old girl visited us with the chief complaints of mandibular protrusion, clicking and pain. She had had the habit of mandibular protrusion since she was around 2 years old. She has had pain and clicking of the right TMJ before going to bed since the age of 3 years and 6 months. Thereafter the frequency of the protrusion continued to increase. She has no pain and clicking of the right TMJ, however. The interincisal opening distance was 45 millimeters. She had clicking and no pain at the right TMJ. The over-bite was 1.5 millimeters. The over-jet was 1.0 millimeters. She had no other habits except this mandibular protrusion. Roentogengraphic examination revealed no abnormality on her condylar heads. The jaw-opening and closing pathways of the incisor point movement was in disorder. Also the trace of the frontal movement was asymmetry. The patient and her parents were instructed not to allow protrusion of the mandible. The symptoms and the oral habit disappeared after 9 months.View full abstractDownload PDF (1896K) -
Ichiro Yamamoto, Yoshinori Fujita, Yuri Fujiwara, Satoru Tobiume2004 Volume 42 Issue 3 Pages 464-474
Published: June 25, 2004
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSSpeech appliances are mainly used for the treatment of articulation disorders due to velopharyngeal inadequacy caused by cleft palate, and cerebro-vascular -accidents and congenital velopharyngeal inadequacy. The dental laboratory technique is useful for the construction of the appliances. However, few dental practitioners are qualified to make the appliance because of the high level of specialization required.
In this study, we report on four cases which were treated with the speech appliances in order to promote the understanding of the appliances among dental practitioners.
The types of the cases were 1) post surgical unilateral cleft lip and palate,2) submucouse cleft palate,3) post surgical cleft palate, and 4) congenital velopharygeal inadequacy. The former three cases were treated with PLP and the last one with Bulb-PLP. Treatment using speech appliances was proven to be effective for the resolution of the speech problems in all of our cases. It is considered that private dental practitioners like us can become involved in the treatment of speech problems due to velopharyngeal inadequacy by constructing speech appliances.View full abstractDownload PDF (10195K)
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