著者

Satoshi Yamaguchi

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.67, no.1, pp.viii-ix, 2023 (Released:2023-01-06)

参考文献数

10

著者

Adriana Cláudia Lapria Faria Renata Cristina Silveira Rodrigues Rossana Pereira de Almeida Antunes Maria da Gloria Chiarello de Mattos Ricardo Faria Ribeiro

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.55, no.2, pp.69-74, 2011 (Released:2011-03-30)

参考文献数

43

被引用文献数

83

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The restoration of endodontically treated teeth is a topic that is extensively studied and yet remains controversial. This article emphasizes the characteristics of endodontically treated teeth and some principles to be observed when restorations of these teeth are planned. It was concluded that the amount of remaining coronal tooth structure and functional requirements determine the best way to restore these teeth, indicating the material to be used, direct or indirect restorations, associated or not to posts.

著者

Jun-Ichi Sasaki Satoshi Imazato

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.64, no.3, pp.239-242, 2020 (Released:2020-08-07)

参考文献数

40

被引用文献数

18

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Purpose: The present review aimed to investigate autoclave sterilization of dental handpieces based on available studies.Study selection: The sterilizing efficiency of dental handpieces with autoclave is mainly affected by the types of apparatus (N, B, and S), the packaging with sterilizing pouch, cleaning, and lubrication. These subjects were reviewed based on the in vitro experimental studies.Results: Dental handpieces can be sterilized, including inactivation of heat-resistant bacterial spores, with type B or type S sterilizers, regardless of the use of a sterilization pouch. In contrast, although type N autoclaves are capable of sterilization of general bacteria such as Streptococcus salivarius even in a sterilization pouch if instruments are washed beforehand, complete sterilization of the wrapped handpiece is not always achieved. Therefore, to achieve sterilization efficiency with type N autoclaves, processing without any packaging is recommended. As regards cleaning of handpiece, although contamination decreases with irrigation and wiping of handpieces, all reports concluded that these treatments alone do not achieve complete decontamination of reusable handpieces.Conclusion: Although type B and type S autoclaves allow us to sterilize the dental handpieces, it is important to realize that complete sterilization of the handpiece is not always achieved by type N autoclave. Understanding autoclave processing of handpieces is essential for dental practice to deliver the safe dental care.

著者

Yurina Takaoka Yosuke Akiba Masako Nagasawa Akiko Ito Yukiko Masui Nami Akiba Kaori Eguchi Haruna Miyazawa Koichi Tabeta Katsumi Uoshima

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.66, no.3, pp.438-444, 2022 (Released:2022-07-30)

参考文献数

23

被引用文献数

8

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Purpose: This study aimed to investigate the relationship between dental metal allergy, periodontitis, and palmoplantar pustulosis among patients from a dental metal allergy clinic over a period of 8 years.Methods: This study included 436 patients who visited our dental metal allergy clinic between April 1, 2009 and March 31, 2016. Diagnoses of skin diseases, periodontal records, dental metal series patch test results, and electron probe microanalysis (EPMA) data were obtained from medical records. Relative risk (RR) values were estimated from these data.Results: Of the 359 patients who underwent the patch test, 241 showed a positive reaction. Of the 187 patients who underwent EPMA, 113 had allergenic metals in their dental prostheses. These patients were suspected to have a dental metal allergy. Furthermore, 150 of the 436 patients were diagnosed with palmoplantar pustulosis (PPP). The RR of metal allergy between patients with PPP and healthy subjects was 3.88. The RR of periodontal disease between patients with PPP and PPP-negative patients in the national average was 2.54.Conclusion: In this study, both dental metal allergy and periodontitis showed a high RR for PPP.

著者

Ting Wang Jukka Pekka Matinlinna Michael Francis Burrow Khaled Elsayed Ahmed

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.65, no.3, pp.273-283, 2021 (Released:2021-08-21)

参考文献数

84

被引用文献数

2

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Purpose Fiber-reinforced composites (FRCs) have received considerable attention, owing to their potential use in dental prostheses or bone fracture fixation applications. The aim of this systematic review was to analyze and report the biological properties of FRCs reported in the existing literature.Study selections A systematic search of four databases (PubMed/MEDLINE, Scopus, Web of Science, and Cochrane library) was performed to identify all relevant studies published between 1962 and 2019. The search was limited to laboratory-based studies published in English. Citation mining was also performed through cross-referencing of included studies and hand searching of relevant journals.Results A total of 1283 potentially relevant articles were initially identified, and thirty-three articles were full-text screened. In the final ten studies included for review, four investigated bacterial adhesion and growth abilities on FRCs, four investigated the fibroblastic cytotoxicity of different surface-treated FRCs, and two investigated the osseointegration between bone and FRCs. Owing to the heterogeneity of fiber types, FRC-coating, and lack of standardized testing protocols, a meta-analysis was not feasible. The included studies indicated that glass fibers, and in particular E-glass fibers, are superior to ceramics and other FRCs in terms of bacterial adherence, fibroblast cytotoxicity, and cell viability.Conclusions Glass-fiber-reinforced composites are cytocompatible materials that possess satisfactory biological properties and can be used in dental prosthesis and craniofacial implants. Further research is necessary to regulate the matrix ion release/degradation of FRCs to prolong the initially demonstrated properties.

著者

Ramadhan Hardani Putra Nobuhiro Yoda Eha Renwi Astuti Keiichi Sasaki

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.66, no.1, pp.29-39, 2022 (Released:2022-01-11)

参考文献数

58

被引用文献数

4 39

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Purpose: To review the current clinical studies regarding the accuracy of implant computer-guided surgery in partially edentulous patients and investigate potential influencing factors.Study selection: Electronic searches on the PubMed and Cochrane Central Register of Controlled Trials databases, and subsequent manual searches were performed. Two reviewers selected the studies following our inclusion and exclusion criteria. Qualitative review and meta-analysis of the implant placement accuracy were performed to analyze potential influencing factors. Angular deviation, coronal deviation, apical deviation, and depth deviation were evaluated as the accuracy outcomes.Results: Eighteen studies were included in this systematic review, including six randomized controlled trials, nine prospective studies, and three retrospective clinical studies. A total of 1317 implants placed in 642 partially edentulous patients were reviewed. Eight studies were evaluated using meta-analysis. Fully guided surgery showed statistically higher accuracy in angular (P <0.001), coronal (P <0.001), and apical deviation (P <0.05) compared with pilot-drill guided surgery. A statistically significant difference (P <0.001) was also observed in coronal deviation between the bounded edentulous (BES) and distal extension spaces (DES). A significantly lower angular deviation (P <0.001) was found in implants placed using computer-aided design/computer-aided manufacturing (CAD/CAM) compared to the conventional surgical guides.Conclusion: The edentulous space type, surgical guide manufacturing procedure, and guided surgery protocol can influence the accuracy of computer-guided surgery in partially edentulous patients. Higher accuracy was found when the implants were placed in BES, with CAD/CAM manufactured surgical guides, using a fully guided surgery protocol.

著者

Kae Harada Reiya Horinouchi Mamoru Murakami Yusuke Yamashita Takahiro Yanagisawa Naohiro Shimotahira Yuji Kamashita Taizo Hamada Yasuhiro Nishi Masahiro Nishimura

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_21_00286, (Released:2022-07-13)

参考文献数

42

被引用文献数

1

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Purpose: Denture adhesives improve the stability of incompatible dentures; however, complete removal of adhesives after use is difficult. Only a few studies have focused on the removal of denture adhesives. Hence, this study aimed to assess the efficacy of surfactants in removing cream denture adhesives from acrylic resin materials.Methods: Solutions of twelve surfactants with various hydrophilic-lipophilic balance (HLB) values were prepared. Two cream denture adhesives, colored for visualization, were spread onto transparent acrylic resin plates. After immersion into surfactant solutions, the effects of the surfactants on residual adhesives were evaluated. We also investigated the effect of denture cleaners (with or without the surfactants) on the removability of adhesives and artificial oily dirt, and their effects on the surface properties of denture materials. The obtained data were analyzed using appropriate statistical methods.Results: Five surfactants [BT-5, BL-4.2, BT-7, BT-9, and Triton X-100 (TX)] with HLB values in the 10.5-13.5 range effectively removed adhesives. Addition of BT-9 and TX (HLB=13.5) to denture cleaners improved the adhesives’ removal. Furthermore, the addition of TX to the cleaners did not interfere with the removal of artificial oily dirt and did not damage the denture materials’ surface.Conclusion: Surfactants with HLB values in the 10.5-13.5 range are suitable for removal of cream denture adhesives from acrylic resin materials. In particular, TX (HLB=13.5) efficiently removes adhesives without damaging denture materials or impairing original detergency.

著者

Haruto Hiraba Hiroyasu Koizumi Akihisa Kodaira Kosuke Takehana Takayuki Yoneyama Hideo Matsumura

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_21_00308, (Released:2022-05-14)

参考文献数

32

被引用文献数

1

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Purpose: To clarify the effect of a multi-purpose primer combining several functional monomers on two prosthodontic materials (cast titanium and a gold alloy) after airborne-particle abrasion.Methods: Disk-shaped adherends were prepared from cast titanium (CP Titanium JIS2) and a gold alloy (Casting Gold M.C. Type IV). A silane-containing two-liquid primer (M&C primer (MC)) and two silane-free single-liquid primers (Alloy Primer (AP) and V-Primer (VP)) were used as surface-treatment agents. The shear bond strengths were determined before and after thermocycling to evaluate the adhesive durability, and the results were compared using a non-parametric statistical analysis. The effect of airborne-particle abrasion with alumina on the titanium surface was analyzed by X-ray photoelectron spectroscopy (XPS).Results: There was no significant difference in bond strength between the MC and AP before and after thermocycling, whereas VP showed significantly lower values. XPS revealed that the titanium acquired hydrophilic properties after the airborne-particle abrasion.Conclusions: The novelty of this study is that it shows that the presence/absence of the silane had no effect on the bonding of cast titanium with an acrylic resin. The study also showed that the multi-purpose primer can be used without any problems with both cast titanium and gold alloy, in combination with airborne-particle abrasion with alumina.

著者

Wataru Komada Tasuku Inagaki Yoji Ueda Satoshi Omori Keiichi Hosaka Junji Tagami Hiroyuki Miura

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.61, no.1, pp.73-80, 2017 (Released:2017-03-22)

参考文献数

26

被引用文献数

5

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Purpose: The purpose of this study was to evaluate the influence of water immersion on the mechanical properties of three kinds of glass fiber posts and the fracture resistance of structures using resin composites with glass fiber posts.Methods: Each post was divided into three groups; a control group and two water immersion groups (30 and 90 days). Flexural strength was determined by three-point bending test. Each structure was divided into two groups; a control group and a water immersion group for 30 days. The fracture strength of structures was determined by a static loading test.Results: In the flexural strength, two kinds of post in water immersion groups showed lower values than control groups. In the fracture strength, two kinds of structures in water immersion group showed lower values than control groups.Conclusion: The prefabricated glass fiber posts and structures using resin composites with glass fiber posts were affected by water immersion.

著者

Raphael de Souza Carolina Chaves Kimia Rohani Sabrina Bouferguene Jean Barbeau Eduardo Borie Benjamin Weber Ramon Fuentes Luciana Crizostomo Claudia Silva-lovato Elham Emami

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_21_00258, (Released:2022-03-08)

参考文献数

41

被引用文献数

7

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Purpose: To determine the effectiveness of palatal brushing in the treatment of denture-related erythematous stomatitis (DES) in complete denture wearers.Methods: This two-parallel-arm RCT was conducted in three university clinics in Brazil, Canada, and Chile. Participants (n=77) were randomly allocated to receive (i) instructions for palatal brushing and standard oral/denture hygiene (“intervention”); or (ii) standard oral/denture hygiene instructions only (“control”). Data collection was carried out at the baseline and at 3 and 6 months after intervention. Outcomes included the magnitude of oral Candida carriage and the degree of inflammation of denture-bearing tissues. Groups were compared using generalized estimating equations and chi-square test (α=0.05).Results: Palatal inflammation levels were reduced significantly in the “intervention” compared to “control” group at 6 months (intervention: 70%, control: 40%; chi-square, p=0.04). There was no between-group significant difference in the Candida count from denture and palatal biofilms; however, a subgroup analysis restricted to baseline Candida carriers showed further reduction with the intervention at 6 months. No adversity was observed by trialist or reported by participants.Conclusion: Including palatal brushing in oral instructions for denture wearers has positive impact on DES-related mucosal inflammation. Thus, our findings endorse the inclusion of palatal brushing in standard oral hygiene instructions to treat DES.

著者

Katsura Ohara Yukari Isshiki Noriyuki Hoshi Akinori Ohno Norishige Kawanishi Shintaro Nagashima Makoto Inoue Daijiro Kubo Katsuhiko Yamaya Erika Inoue Katsuhiko Kimoto

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_21_00048, (Released:2022-01-27)

参考文献数

44

被引用文献数

20

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Purpose: Evidence regarding the performance of digital dentures (DDs) fabricated using 3D printing is insufficient. This study aimed to evaluate patient satisfaction with conventional dentures (CDs) and DDs fabricated using 3D printing.Methods: This randomized controlled trial was conducted between November 2017 and May 2020. In the CD-DD group, CDs were fabricated before DDs, while the protocol was reversed in the DD-CD group. The primary outcome was patient satisfaction, quantified using a 100-mm visual analog scale, which assessed chewing efficiency, pain, stability, retention, comfort, esthetics, ease of cleaning, phonetics, and general satisfaction. Secondary outcomes were quality of life (QOL), number of visits, time required for definitive denture fabrication, number of adjustment appointments, and time required for denture stabilization after denture delivery.Results: Patient satisfaction with CDs was superior in terms of phonetics, ease of cleaning, stability, comfort, and general satisfaction. Secondary outcomes such as social disability and the number of clinic visits were significantly lower in patients with DDs. However, the two groups showed no significant differences in the other outcomes. Although patient satisfaction with DDs was inferior to that with CDs, 20% of patients preferred and used DDs (12 patients preferred CDs, and three patients opted for DDs).Conclusion: Although patient satisfaction or QOL with DDs may be somewhat inferior to that with CDs, 20% of patients preferred and used DDs daily. Thus, DDs fabricated using 3D printing may have comparable practicality and efficacy to CDs.

著者

Keigo Nagashima Takeshi Kikutani Noriaki Takahashi Yoko Kato Keiichiro Sagawa Takashi Tohara Fumiyo Tamura

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_20_00290, (Released:2021-11-18)

参考文献数

33

被引用文献数

2

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Purpose: This study aimed to develop a simple screening test for mastication, “the Sakiika (squid jerky) transport test (STT), which evaluates the vertical jaw movement coordinated with the lateral tongue movement during stage I transport, and investigate the possibility of its clinical application. Methods: The study included 73 people with dysphagia (mean age, 78.5 ± 7.8 years; median age, 79.0 years; interquartile range, 75.0–84.0). The STT evaluated the ability of a participant to transport a piece of squid jerky placed on the midline of the tongue to the molar region. The STT score was defined as the number of vertical jaw movements occurring as the tongue transported food to the molars. A cutoff value was set by comparing the STT scores with masticatory function evaluated via a videofluoroscopic swallowing study and with food texture evaluated using the Food Intake LEVEL Scale (FILS). Results: The STT scores counted by the two examiners had a κ coefficient of 0.79, indicating good reliability. The STT score was significantly associated with both the presence of masticatory movement ( p = 0.019) and food texture classified by FILS ( p = 0.032) at cutoff value of “3” (3 vertical movements). The STT showed 62% sensitivity and 75% specificity for masticatory movements. Conclusion: The STT could be a useful screening test to assess the presence or absence of food transportation to the molars for mastication in older patients with dysphagia. In addition, the STT could be useful in identifying the need to modify food texture to meet functions.

著者

Jin Kitani Futoshi Komine Kosuke Kusaba Daishi Nakase Keigo Ito Hideo Matsumura

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_21_00055, (Released:2021-09-17)

参考文献数

20

被引用文献数

3

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Purpose: This study evaluated the influence of firing procedures and layering thickness of porcelain on internal adaptation of maxillary anterior cantilever zirconia resin-bonded fixed dental prostheses (RBFDPs). Methods: The maxillary right central incisor on a model was prepared for a single-retainer zirconia RBFDP. A total of 36 frameworks of cantilever zirconia RBFDPs were classified into three groups (CB0.5, CB1.0, and CB2.0 groups) based on the thickness of the cut-back on the facial surface (0.5 mm, 1.0 mm, and 2.0 mm, respectively). Feldspathic porcelain was layered onto the facial surface of the zirconia RBFDP frameworks. Internal space widths between the abutment tooth and the framework were measured before and after porcelain firing by a replica technique. The internal space values before and after porcelain firings were compared using the paired t-test within the same group (α = 0.05). Differences in internal space values (distortion) between before and after porcelain firing were compared using one-way analysis of varianc e and Tukey multiple comparison tests. Results: For all framework designs, internal space values after porcelain firing were significantly higher than those before firing. Among all groups, the CB0.5 group showed the lowest internal distortion values for the whole measured area. The CB2.0 group showed higher distortion values than the CB1.0 group. Conclusions: Porcelain firing procedures negatively impacted the internal space in cantilever zirconia RBFDPs. In addition, the increased volume of layering porcelain had a negative effect on the internal distortion of ma xillary anterior cantilever zirconia RBFDPs.

著者

Yuya Yoshida Glenn Thomas Clark

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPOR_2019_499, (Released:2020-09-09)

参考文献数

8

被引用文献数

11

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Purpose: The aim of this study was to compare and contrast the diagnostic accuracy of multiple online symptom checkers when used for the diagnosis of orofacial pain and oral medicine related disease vignettes. The comparison condition used in this study was the diagnostic accuracy achieved by advanced specialty residents on these same vignettes using a virtual patient system. Methods: 27 individual disease vignettes were utilized. These vignettes had a variety of orofacial pain and oral medicine diseases. Post graduate orofacial pain and oral medicine residents at our University of Southern California interacted with their randomly assigned virtual patients were analyzed [n=574]. Virtual patient accuracy was based on whether the user selected the primary diagnosis as one of their top four choices after interviewing. Eleven English-language symptom checkers accuracy was based on whether the vignettes produced the primary diagnosis as one of their top four choices. Using these data, symptom checker and virtual patient accuracy rates were calculated. Results: The primary diagnosis on virtual patient encounters was found within the top four choices a mean of 67.2% of the time. The primary diagnosis for the same vignettes entered into the 11 symptom checkers was found within the top four choices a mean of 5.9% of the time. Conclusions: The accuracy of currently available symptom checkers that patient might use for self-diagnosis of common orofacial pain and oral medicine diseases was low, this result suggest that the improved diagnostic algorithms are needed.

著者

Yuya Yoshida Glenn Thomas Clark

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

vol.65, no.2, pp.186-190, 2021 (Released:2021-06-30)

参考文献数

8

被引用文献数

11

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Purpose: The aim of this study was to compare and contrast the diagnostic accuracy of multiple online symptom checkers when used for the diagnosis of orofacial pain and oral medicine related disease vignettes. The comparison condition used in this study was the diagnostic accuracy achieved by advanced specialty residents on these same vignettes using a virtual patient system. Methods: 27 individual disease vignettes were utilized. These vignettes had a variety of orofacial pain and oral medicine diseases. Post graduate orofacial pain and oral medicine residents at our University of Southern California interacted with their randomly assigned virtual patients were analyzed [n=574]. Virtual patient accuracy was based on whether the user selected the primary diagnosis as one of their top four choices after interviewing. Eleven English-language symptom checkers accuracy was based on whether the vignettes produced the primary diagnosis as one of their top four choices. Using these data, symptom checker and virtual patient accuracy rates were calculated. Results: The primary diagnosis on virtual patient encounters was found within the top four choices a mean of 67.2% of the time. The primary diagnosis for the same vignettes entered into the 11 symptom checkers was found within the top four choices a mean of 5.9% of the time. Conclusions: The accuracy of currently available symptom checkers that patient might use for self-diagnosis of common orofacial pain and oral medicine diseases was low, this result suggest that the improved diagnostic algorithms are needed.

著者

Namrath Chatchaiyan Kaoru Koide Makoto Tsuchimochi Hajime Tanji Eiichiro Asano Hironobu Ishii Toshihide Sato Mami Ishii Atsuko Kondo Keishi Ohta

出版者

Japan Prosthodontic Society

雑誌

Prosthodontic Research & Practice (ISSN:13477021)

巻号頁・発行日

vol.7, no.2, pp.222-224, 2008 (Released:2008-11-05)

参考文献数

5

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The purpose of this study was to achieve optimal contrast of imaging characteristics in 4 dimensional MR images of the temporomandibular joint (TMJ) for evaluating the TMJ structures during mandibular movement. Twelve TMJs from six subjects without any TMJ dysfunction were studied. MRI was performed using a 1.5 MR system with an eight-channel phased array coil. The images were acquired using a balanced steady-state free precession (b-SSFP) sequence. The optimal flip angle was determined for differentiation for the main anatomical structures of the TMJ; the posterior band of the articular disc, the retrodiscal tissues, the condylar head, and the lateral pterygoid muscle, by examining the signal intensity (SI-d) of TMJ structures on b-SSFP MR images obtained using various flip angles. Repeated measures two-way analysis of variance (ANOVA) was performed, followed by Bonferroni's multiple comparison analysis. The main anatomical structures of the TMJ had the highest SI-d at flip angles of 30 degrees and 40 degrees, and there were the most significant differences between the SI-d of the articular disc and all other structures at a flip angle of 40 degrees, followed by a flip angle of 30 degrees. These data suggest that a flip angle of approximately 30 degrees to 40 degrees is appropriate for obtaining the optimal contrast of imaging characteristics for 4 Dimensional MR images of the TMJ with b-SSFP sequence.

著者

Simonne Salazar Yoko Hasegawa Satsuki Kikuchi Koh Kaneda Hiroyuki Yoneda Takashi Nokubi Kazuhiro Hori Takahiro Ono

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_20_00045, (Released:2020-10-06)

参考文献数

40

被引用文献数

15

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Purpose: This study investigated the impact of the renewal of a removable prosthesis on the masticatory function by subjective and objective measures and its variation among the types of occlusal support. Methods: Seventy-eight patients who received newly fabricated removable denture patients participated in this study. For the objective assessment, masticatory performance was measured using test gummy jelly. For the subjective assessment, standardized questionnaires about food acceptability and the oral health-related quality of life (OHRQoL) were used. Pre- and post-insertion assessments were performed for each subject. Subjects were divided into three groups according to their posterior occlusion: with posterior occlusion (w/PO), without posterior occlusion (w/o PO) and edentulous. Wilcoxon’s signed rank test was used to compare the pre- and post-treatment measurements of each assessment. The analysis of covariance and a multiple comparison were used to assess the effect of new dentures and differences due to occlusal support. Results: The masticatory performance, OHRQoL and food acceptability following prosthodontic treatment were significantly improved by new denture insertion. The masticatory performance among groups varied to a relative degree. The rate of masticatory performance improvement for edentulous subjects was twice that in w/PO subjects. The OHRQoL was significantly lower in the w/o PO and edentulous groups with old denture than patients w/PO. The food acceptability improved most markedly in the edentulous group. Conclusions: The improvement in the masticatory performance by new denture insertion varied among types of occlusal support. Re-establishing the occlusal support of edentulous patients may help restore their OHRQoL and improve food acceptability.

著者

Hisashi Koshino Toshihiro Hirai Yoshifumi Toyoshita Yuichi Yokoyama Maki Tanaka Kazuo Iwasaki Toshio Hosoi

出版者

Japan Prosthodontic Society

雑誌

Prosthodontic Research & Practice (ISSN:13477021)

巻号頁・発行日

vol.7, no.1, pp.12-18, 2008 (Released:2008-02-22)

参考文献数

17

被引用文献数

19 40

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Purpose: The purpose of this study was to reduce the number of food items for ease of use, and to eliminate the influence of food preferences (likes and/or dislikes) on an earlier version of the food intake questionnaire method for evaluating the ability of mastication in complete denture wearers which had been previously developed by the authors.Methods: The subjects were 262 complete denture wearers (average age: 76.7±6.1 years old, male: 128 persons, female: 134 persons). The food intake questionnaire composed of a list of 35 food items which were used in the study. All subjects were asked to assign a mark to each type of food according to one of five categories (easily eaten, eaten with difficulty, cannot be eaten, do not eat because of dislike, have not eaten since starting to wear dentures). In order to reduce the number of the initial 35 food items in the questionnaire, the correlation coefficient of the masticatory score, representing the masticatory ability before and after elimination of foods, was examined in all the subjects. The masticatory performance (MP) was also evaluated by a sieving method in all subjects.Results: In the questionnaire with 5 categories composed of 25 foods, the reliability coefficient (Cronbach’s α) was 0.939. There was significant correlation between the masticatory score using the 35 food item list and the new masticatory score using the new 25 food item list (r=0.95, P<0.01). There was significant correlation between the MP using the sieving method and the N-MS using the 25 food item list (r=0.62, P<0.01).Conclusion: It was confirmed that the new food intake questionnaire method, with a revised 25 food item list, was both valid and reliable.

著者

齋藤 隆哉 小出 馨 浅沼 直樹 西巻 仁 植木 誠

出版者

Japan Prosthodontic Society

雑誌

日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society (ISSN:03895386)

巻号頁・発行日

vol.46, no.2, pp.195-202, 2002-04-10

参考文献数

32

被引用文献数

1

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目的: 咬合採得および咬合調整を行う際の基準となる筋肉位に対して, 表情筋の緊張が及ぼす影響を明らかにすることを目的として, 表情筋により口角を後方へ強く牽引したときの下顎の偏位を測定した.<BR>方法: 顎口腔系に機能異常を認めない被験者13名に座位で自然頭位をとらせ, アンテリアジグを装着し, 上下歯列の接触による影響を排除して実験を行った. 筋肉位で閉口した状態から口角を後方へ強く牽引したとき, その後さらにタッピングを行ったときの下顎の偏位を継続的に光学系非接触方式の三次元6自由度下顎運動測定装置であるナソヘキサグラフ®に改良を加えて測定し, 比較した.<BR>結果: 筋肉位と比較して口角牽引時には, 切歯点で後方へ平均0.18mm, 左側顆頭点で平均0.00mm, 右側顆頭点で後方へ平均0.04mmの偏位が認められ, 前後方向に大きなばらつきがみられた.筋肉位と比較して口角牽引状態でのタッピング時には, 切歯点で後方へ平均0.50mm, 左側顆頭点で後方へ平均0.25mm, 右側顆頭点で後方へ0.36mmの偏位が認められた.<BR>結論: 表情筋を緊張させることにより口角を後方へ強く牽引すると, 筋肉位に対して下顎は偏位を示し, 前後方向に大きなばらつきがみられた. 口角牽引状態でタッピングを行うと, 下顎は筋肉位より著明に後方へ偏位することが明らかとなった.

著者

平井 敏博 越野 寿

出版者

Japan Prosthodontic Society

雑誌

日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society (ISSN:03895386)

巻号頁・発行日

vol.50, no.3, pp.353-362, 2006-07-10

参考文献数

26

被引用文献数

2 6

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歯科補綴学は生命科学や健康科学をベースとする実学であり, 人々の健康・福祉の向上に貢献する役割を担っている. そして, その臨床の特徴は, 齲蝕や咬合・咀嚼障害などの疾患や障害に対しての「予防」と「治療」の面と, 歯などの喪失により損なわれた形態的・機能的障害の改善や回復を目指す「リハビリテーション」の面を併せ持っていることである. 歯科補綴学研究は, 健康科学, 生命科学の視点からの種々の研究によって, 必ずや補綴歯科治療の健康・福祉への重要性を明確に証明するであろう. 三叉神経が関与する咬合・咀嚼と高次脳機能や生体情報伝達系との関係など, 脳研究の進展が期待されるところである. また, 人口動態からみても, 本学会の学術研究活動は, まさに21世紀に求められる主要な医療のための活動の一つであるといえる.<BR>補綴歯科臨床の観点からは, 診察法, 検査法を含む診断学の充実が望まれる. 診断には, 補綴治療後の機能回復の程度を予測することも含まれる. このためには, 咀嚼機能評価法とともに, 顎口腔系を構成する各器官・組織の評価法の確立が待たれるところである.<BR>社団法人としての本学会の公益・社会活動も重要である. 専門医のみならず歯科医師全体の診療能力の向上による良質な医療の提供を図るとともに, 補綴歯科臨床の意義に関する活発な啓発活動を実践し, 「健康科学としての歯科補綴学」を広く国民に認識させるための方策を考え, 実行すべきである.