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Volume 49 (2007)
- Issue 4 Pages 283-
- Issue 3 Pages 189-
- Issue 2 Pages 109-
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Volume 49, Issue 4
Displaying 1-7 of 7 articles from this issue
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A Foreword
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Toshihiko NagataArticle type: A Foreword
2007 Volume 49 Issue 4 Pages 283-284
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSDownload PDF (148K)
Original Work
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Naoki Kakudate, Manabu Morita, Masako Fujisawa, Masato Nagayama, Masam ...Article type: Original Work
2007 Volume 49 Issue 4 Pages 285-295
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSThis research was aimed at developing a task-specific self-efficacy scale for self-care (SESS) for periodontal disease patients and examining its reliability and validity. In the preliminary stage, a scale consisting of 43 items was designed and applied to 61 periodontal disease patients, and subsequently, 15 items were selected for inclusion in the SESS. A survey using this scale was further conducted on 189 periodontal disease patients in order to verify the reliability and validity of the SESS. Three factors were extracted from the factor analysis, as follows : “self-efficacy for dentist consultations”, “self-efficacy for brushing of the teeth”, and “self-efficacy for dietary habits.” The SESS showed sufficient internal consistency(Cronbach's α = 0.86). Significant correlations in the scores of the SESS were observed between tests and re-tests (r = 0.73), indicating that the scale is highly reliable. The SESS score showed significant correlations with the General Self-Efficacy Scale (GSES) scores (r = 0.44), which suggests concurrent validity. The mean % reduction in the Plaque Control Record following instructions on brushing of teeth was significantly higher in the patients with high SESS scores than in those with low scores (p<0.05). This result is indicative of the predictive validity of SESS. Since patients in the maintenance phase had significantly higher SESS scores than the initial-visit patients (p<0.001), the construct validity of the scale was inferred. These results suggest that the SESS has a high reliability and validity and will endure research applications in clinical practice.
Nihon Shishubyo Gakkai Kaishi (J Jpn Periodontol) 49 : 285 - 295, 2007.View full abstractDownload PDF (1081K) -
Akihito Kato, Hirofumi Miyaji, Tsutomu Sugaya, Masamitsu KawanamiArticle type: Original Work
2007 Volume 49 Issue 4 Pages 296-304
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSThis study evaluated periodontal regeneration after the application of BMP-2 to root dentin surface in 1-wall infrabony defects.
The mandibular first and third premolars in seven beagle dogs were extracted prior to experimental surgery. Eight weeks after the extraction, the periosteum was removed from the alveolar bone following the retraction of a partial thickness of the muco-gingival flap. Subsequently, 1-wall infrabony defects (5 mm in height, 3 mm in width) were surgically created in the mesial and distal sides of the mandibular second premolars, and in the mesial sides of the mandibular fourth premolars. Then, the periodontal ligament and the cementum on the exposed root surface were thoroughly removed. The denuded root surface was demineralized with 24% EDTA for 3 minutes. In the BMP group, BMP-2 solution (1000 μg/m) was applied to the root surface, and the flap was repositioned. BMP-2 was not applied in the control group. Histological and histometrical analyses were performed at four and eight weeks after surgery.
At eight weeks,new bone formation, new cementum formation and ankylosis were significantly greater in the BMP group than in the control group (p<0.01). The down-growth of the junctional epithelium in the BMP group was significantly smaller than that in the control group (p<0.05).
These findings suggest that periodontal regeneration was enhanced by the application of BMP-2 to the root dentin surface in 1-wall infrabony defects.
Nihon Shishubyo Gakkai Kaishi (J Jpn Periodontol) 49 : 296-304, 2007.View full abstractDownload PDF (711K) -
Tetsuya Watanabe, Masayuki Momiyama, Masahiko Goto, Keiichi Kanayama, ...Article type: Original Work
2007 Volume 49 Issue 4 Pages 305-315
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSHyaluronan (HA) is a component of the extracellular matrix that is associated with inflammatory reactions. Application of HA can effect the wound healing of soft tissue. However the effect of HA on bone metabolism is unclear. The purpose of this study was to evaluate the usefulness of application of HA to cranial bone defects on bone formation in rats. We investigated the effect of application of different molecular weights (9×105,25×105) of HA to calvarial bone defects in the rat. The control bone defects were filled with PBS. The experimental sites were examined by standardized radiological analysis after surgery. Rats were sacrificed 1, 2, or 3 weeks after surgery, and the cranial tissue was removed and the experimental site was sectioned for histological study. Paraffin sections were stained with hematoxylin and eosin, and for tartrate-resistant acid phosphatase and alkaline phosphatase. The area of the newly formed bone was measured under a microscope,and the effect of gelatin as a scaffold for HA delivery was assessed at the same time. At 3 weeks after surgery there was significantly more new bone formation in the bone defect in the HA groups than in the control group. The localization of TRAP positive site was seen most strongly on the bone margin one week after surgery. There was less new bone formation in the HA with gelatin group than in the HA without gelatin group. There were no significant differences between the concentrations of HA. The gelatin as a scaffold for HA inhibited bone formation. HA enhances cranial bone formation in rats, and HA may be useful for alveolar bone regeneration.
Nihon Shishubyo Gakkai Kaishi (J Jpn Periodontol) 49 : 305-315, 2007.View full abstractDownload PDF (1058K)
Case Report
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Chiemi Mori, Hiromi Okochi, Eiko Koide, Kyoko Yamaba, Kazuyo Yamada, K ...Article type: Case Report
2007 Volume 49 Issue 4 Pages 316-322
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSA 23-year-old woman with a noncontributory medical history was referred to our hospital in December 1992 with a chief complaint of anterior crowding. A complete oral examination revealed the pronounced loss of periodontal attachment in most parts of the dentition, anterior spacing, and crowding with collapse of the posterior occlusion. Initial periodontal therapy was started after a diagnosis of generalized aggressive periodontitis with pathologic migration of the anterior teeth arising from secondary occlusal trauma, leading to midline diastema and posterior bite collapse. Following the completion of the initial periodontal therapy by both the periodontist and the dental hygienist,periodontal surgeries-including a guided tissue regeneration technique for the progressive deep pockets-were performed for teeth 13, 14, 15,16, 17, 24, 25, 26, and 27. Tooth 14 was extracted during supportive periodontal therapy (SPT). After the healing of the periodontal tissue, orthodontic treatment based on an edgewise technique-including bite opening, the correction of crowding and space closure-was applied to reestablish esthetic and physiologic occlusion. After 1 year of orthodontic treatment, prosthetic treatment was performed for teeth 13∼15 and 44∼46. The patient returned for SPT about 15 years after the initial visit. The mean attachment level, probing depth (PD) and the number of sites with a PD of more than 4 mm were decreased from 5.2 mm, 4.5 mm and 107 sites (61.5%) and maintained at 4.9 mm, 2.9 mm and 18 sites (12.0%) in February 2006, respectively. The outcome of this case demonstrates the resolution of periodontal tissue destruction and malocclusion, with gains in the clinical attachment levels and a successful esthetic and functional final result.
Nihon Shishubyo Gakkai Kaishi (J Jpn Periodontol) 49 : 316-322, 2007.View full abstractDownload PDF (786K) -
Satomi Nanba, Junichi Tatsumi, Kenji Katsurayama, Akihiko Kitazume, Ki ...Article type: Case Report
2007 Volume 49 Issue 4 Pages 323-331
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSIn the current implant therapy scenario, many patients desire sensuousness as well esthetics as much as functionality. The patient was a 17-year-old Japanese female in good general health, who required implant treatment for a root fracture sustained in a traffic accident. Esthetic satisfaction was provided by adjustment of the soft tissues carrying by provisional restoration and immediate placement of an implant. Beta-tricalcium phosphate and platelet-rich plasma were used for the guided bone regeneration(GBR) in the protocol. Before GBR, we used the surgical index technique was used for provisional restoration, and this restoration was immediately used after the 2nd surgery. Five months after the implantation, the provisional restoration was delicately adjusted to obtain an esthetic soft tissue form. Coordinative provisional restoration was used as reference for the final restoration. In this case, an esthetically satisfying result was obtained by maintenance of the soft tissue surrounding the defect site, and inducing a soft tissue profile.
Nihon Shishubyo Gakkai Kaishi (J Jpn Periodontol) 49 : 323-331, 2007.View full abstractDownload PDF (602K)
Research Report
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Kozue Okayasu, Yukiyasu Kanamori, Ginko Osawa, Hiroki Kawamura, Hirosh ...Article type: Research Report
2007 Volume 49 Issue 4 Pages 332-339
Published: 2007
Released on J-STAGE: February 13, 2008
JOURNAL FREE ACCESSScaling and root planing are considered as amongst the most important and frequently conducted procedures in periodontal therapy. The condition of the cutting edges of the curette affect the efficiency of scaling and root planning. It is important in periodontal treatment to maintain the cutting edges properly Thus, sharpening of curettes is an essential procedure. Therefore, we undertook a preclinical exercise to impart training in sharpening using dull instruments, and then evaluated the shape of the instruments and the effects of the sharpening.
Fourth grade students of Nippon Dental University participated in this study. They practiced methods for sharpening dull instruments in accordance with the scaling and root planing practices with Gracey curettes. The students sharpened the instruments twice in class. The cutting edges were evaluated by the instructors and graded as follows; “excellent”, “fair”, “poor”. In addition,a questionnaire survey was also conducted.
In regard to the evaluation of the cutting edges, the frequency of “excellent” and “fair” was increased, and that of “poor” was decreased at the second evaluation as compared with the corresponding frequencies in the first evaluation. The questionnaire survey showed that most students considered that sharpening of the curettes was a difficult task, that it was important to understand the structure of the curettes, and that they understood how to sharpen curettes.
Use of dull instruments for training in sharpening of instruments made the students understand the structure of curettes, methods of sharpening and the importance of sharpening better. In conclusion, use of dull instruments for training in sharpening methods is very effective.
Nihon Shishubyo Gakkai Kaishi (J Jpn Periodontol) 49 : 332-339, 2007.View full abstractDownload PDF (1283K)
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