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Volume 51 (2013)
- Issue 4 Pages 429-
- Issue 3 Pages 317-
- Issue 2 Pages 153-
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Volume 51, Issue 4
Displaying 1-7 of 7 articles from this issue
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ORIGINAL ARTICLE
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Hiromi NAKAHARA, Masatoshi TAGAYA, Yoshihiro NISHIDA, Tsuguko KONDO, Y ...2013 Volume 51 Issue 4 Pages 429-439
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSThe aim of this study was to investigate the curative effects of the Muh shield functional orthodontic appliance on anterior crossbite in primary dentition.The subjects were 66 children (mean 5 years 1 month old at start of study) with anterior crossbite who were evaluated regarding the clinical effectiveness of the Muh shield and duration of treatment. Sixteen of the subjects in dental stage IIA also participated in a second study. Model (arch length,arch width, occlusal height) and cephalometric analyses were performed before and after treatments. In addition, change in palate form was evaluated by measuring the vertical section plane area of the palatine.The following results were obtained. 1) Occlusal improvement was found in 78.8% of the subjects for the duration of treatment (average 9.8 months), which was judged to be effective with no differences for duration of treatment between the initiation age and dental stage. 2) Using model analysis,significant changes were found in overjet measurements, length of both the upper and lower dental arches, inter-canine width of both the upper and lower jaws, and occlusal height (p＜0.01). As for inter-canine width, that of the upper jaw was significantly increased, while the lower was decreased (p＜0.01). 3) Cephalometric analysis revealed significant changes for the measurement items ANB,FMA, Y-Axis, and APDI (anteroposterior dysplasia indicator), as well as in U1 to FH and the SN plane angles, and L1 to MP (p＜0.01). 4) A significant increase in the longitudinal section area of the palatine was also found (p＜0.05).In conclusion, the Muh shield functional appliance was found to be effective for treatment of anterior crossbite in younger children. Furthermore, it was found to affect not only the inclination of the anterior teeth, but also the bimaxillary relationship and palatal form even without application of direct orthodontic force to the teeth.View full abstractDownload PDF (927K) -
Kimihiro WATANABE, Kiyoshi KONISHI2013 Volume 51 Issue 4 Pages 440-446
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSStudies of pathogenicity as well as screening of therapeutic and preventive agents for Agregatibacter actinomycetemcomitans, a periodontopathic bacterium, require an appropriate animal model. We examined the usefulness of Bombyx mori as a potential animal model and examined whether infection by A. actinomycetemcomitans is protected by astaxanthin, a scavenger for reactive oxygen species.The following results were obtained.1.A. actinomycetemcomitans had a silkworm-cidal effect.2.The silkworm-cidal activity of A. actinomycetemcomitans was inhibited by incorporation of astaxanthin into liposomes.3.Astaxanthin did not have an influence on growth of this bacterium.4.Astaxanthin decreased the numbers of bacteria in the silkworms.Taken together, our results indicate that the silkworm-cidal activity of A. actinomycetemcomitans was repressed by astaxanthin.View full abstractDownload PDF (696K)
CASE REPORT
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Emi INADA, Issei SAITOH, Daisuke MURAKAMI, Yoshihiko TAKEMOTO, Ken MOR ...2013 Volume 51 Issue 4 Pages 447-455
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSAlthough the number of children with caries has recently decreased, many cases with severe dental caries are still encountered, with social factors significantly related to this incongruity in caries patterns. Since the environment surrounding a child can be complex, parents may have little time to check the oral health of their children.In the present study, we report treatment of a case of severe dental caries starting in early childhood and long-term oral management until the completion of permanent dentition. At the first visit, the biomedical factors (i.e., oral hygiene, eating habits) of the patient were deteriorated due to social factors. In spite of treatment to improve the intraoral environment, caries risk remained elevated. We performed oral management and space maintenance by tooth alignment while taking into account lifestyle factors. Consequently, we were able to prevent caries and malalignment of teeth, and guide to a healthy oral environment and dentition. This comprehensive long-term management strategy in childhood was effective.It is very important for pediatric dentists to urge that children maintain good oral health from a medium- and long-term perspective while monitoring social and biomedical factors.View full abstractDownload PDF (1525K) -
Shin TAKAGI, Masaaki KOMAI, Mitsuru HIGUCHI, Hironobu TAMURA, Takashi ...2013 Volume 51 Issue 4 Pages 456-460
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSHamartoma occurrence in the oral cavity is rare. A 7-year-old girl visited our hospital on December 28, 2006 at the age of 7 years 7 months with discomfort in the dorsum of the tongue. Intraoral findings included a hemispheric indolent soft elastic pink mass sized 17×17 mm in the posterior region of the dorsum of the tongue. After monitoring for approximately 18 months, the mass was resected on August 25, 2008 (9 years 2 months old) and diagnosed as a leiomyomatous hamartoma. At the latest examination, the course has been uneventful without recurrence for approximately 3 years (12 years 2 months old).View full abstractDownload PDF (850K) -
Case ReportKeiji MASUDA, Haruyoshi YAMAZA, Soichiro NISHIGAKI, Takako OGASAWARA, ...2013 Volume 51 Issue 4 Pages 461-466
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSHallerman-Streiff Syndrome is a rare congenital disease characterized by dyscephaly, hypotrichosis,microphthalmia, cataracts, proportionate short stature, skin atrophy, and dental anomalies. Airway management is usually difficult in affected patients, because the dyscephaly in this syndrome includes micrognathia and microstomia. We treated a 13-day-old male with Hallerman-Streiff Syndrome who was presented with a natal tooth in the anterior region of the upper jaw. The natal tooth was apparently unstable because of a small tumor-like lesion in the gingiva and X-ray images revealed no root formation. In addition, micrognathia, microstomia, and thoracocyllosis were found in association with Hallerman-Streiff Syndrome. These findings raised the possibility that the natal tooth might easily become dislodged, and then be difficult to find and remove from the oral cavity. Under local anesthesia we excised the tumorous gingiva along with the natal tooth and occluded the bleeding point with an absorbable suture. The postoperative course was satisfactory. Herein, we discuss risks and treatment of a natal tooth in patients with craniofacial anomalies, particularly micrognathia and microstomia.View full abstractDownload PDF (928K) -
Case ReportKeiji MASUDA, Takako OGASAWARA, Haruyoshi YAMAZA, Yukiko OOKUMA, Soich ...2013 Volume 51 Issue 4 Pages 467-472
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSLanger-Giedion syndrome (LGS) and trichorhinophalangeal syndrome (TRPS) type II are contiguous gene syndromes caused by loss of functional copies of the TRPS1 and EXT1 genes associated with 8 q chromosome deletion. TRPS1 gene deletion causes craniofacial dysmorphism and skeletal abnormalities, while deletion of the EXT1 gene causes multiple cartilaginous exostoses. Patients with LGS have clinical variability, depending on the loss of additional genes associated with the variability of the size of the deleted chromosomes. However, dental abnormalities have not been extensively reportedinLGS,incontrasttoTRPStypeI,whichiscausedbylossoffunctionoftheTRPS1 gene.Here, we describe dental anomalies including an impacted supernumerary tooth, delayed tooth eruption, and crowded teeth in an 11-year-old boy with LGS and mild mental retardation. A large number of carious teeth were found along with poor oral hygiene. The chief complaint was tooth pain caused by dental caries as well as crowding in the maxillary anterior teeth. Radiographic findings also revealed an impacted supernumerary tooth in the left mandibular premolar region. In the present case,there were several risk factors associated with LGS in regard to dental treatment and management,such as mental retardation, hyperflexible joints, and redundant skin. With behavior modification therapy to promote cooperation for dental treatment at our outpatient clinic, both treatment of the dental caries and extraction of the impacted supernumerary tooth were successfully performed under local anesthesia. We are continuing follow-up examinations every 3−6 months to maintain oral hygiene and observe eruption of permanent teeth.View full abstractDownload PDF (892K) -
Case ReportKeiji MASUDA, Yukiko OOKUMA, Takako OGASAWARA, Haruyoshi YAMAZA, Soich ...2013 Volume 51 Issue 4 Pages 473-478
Published: November 25, 2013
Released on J-STAGE: March 21, 2015
JOURNAL FREE ACCESSLowe syndrome (oculocerebrorenal syndrome of Lowe) is an X-linked recessive disorder caused by loss of functional mutation of the gene encoding OCRL1. The main clinical findings are congenital cataracts, mental retardation, and proximal renal tubule dysfunction (Fanconi syndrome). Various dental abnormalities have also been reported, mainly associated with rickets as a result of hypophosphatemia, one of the symptoms of Fanconi syndrome.We treated a 10-month-old boy with Lowe syndrome referred for examination of tooth mobility of erupted primary dentition. The primary central incisors had erupted in the mandible and no remarkable tooth deformity was detected. X-ray images revealed that root formation was not completed and the periodontal ligaments appeared to be slightly widened. However, disappearance of lamina dura and resorption of alveolar bone were not detected, which are usually associated with rickets. From these findings, it was difficult to evaluate whether the tooth mobility was abnormal or physiological. In addition, drug therapy had already been started for improving the metabolic defects associated with Fanconi syndrome, which was effective in preventing rickets and might explain why dental abnormalities were not clearly detected in this case. However, there is a risk of rickets-related dental abnormalities in the future as Fanconi syndrome worsens, thus long-term follow up and professional oral hygiene care are considered necessary in this case.View full abstractDownload PDF (889K)
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