Prosthodontic Research & Practice最新文献_第6页

Head Posture Distribution in the Job, Measured by a Remote Accelerometer 用远程加速度计测量工作中的头部姿势分布

Prosthodontic Research & Practice Pub Date : 2008-07-01 DOI: 10.2186/PRP.7.246

Atsuro Kaneko, Hiroshi Kobayashi, Yoshiaki Yamada, Satoshi Takeuchi, E. Yamashita

{"title":"Head Posture Distribution in the Job, Measured by a Remote Accelerometer","authors":"Atsuro Kaneko, Hiroshi Kobayashi, Yoshiaki Yamada, Satoshi Takeuchi, E. Yamashita","doi":"10.2186/PRP.7.246","DOIUrl":"https://doi.org/10.2186/PRP.7.246","url":null,"abstract":"In order to measure head posture of the working dentists, we have developed a remote measuring device. The purpose of this study is to examine the performance of the device and the availability for the actual daily works. One 2-axes accelerometer was used for the sensor of head movement. The output of the sensor was transported wirelessly with the Bluetooth protocol. The sensor was put on the left ear of a subject by a headphone type attachment. The receiver was connected to a computer and the data was stored directly. The data of the accelerometer was converted to the angle of the head rotation in the computer. The range of the sensor was ±90°with resolution of 0.18°. The axes of the sensor was set as that can measure the front-back bending and side bending movement of the head with sampling rate of 100 Hz. The subject instructed to make a desk work and a dental treatment. The device could be ready for measure within five minutes. The measurable period by one battery was more than two hours. The confirmed effective distance of the transmitter was a range of six meters. By this device we could measure enough period of the dental works and cover the movement range and detect the characteristic head movement of the jobs. With the easiness of preparation and the accuracy, we concluded that this device is available for our purpose.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116420925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Longitudinal Observation of Thin Hydroxyapatite Layers Formed on Anodic Oxide Titanium Implants after Hydrothermal Treatment in a Rat Maxilla Model 大鼠上颌骨水热处理后阳极氧化钛植入物形成羟基磷灰石薄层的纵向观察

Prosthodontic Research & Practice Pub Date : 2008-07-01 DOI: 10.2186/PRP.7.82

S. Ito, J. Takebe

{"title":"Longitudinal Observation of Thin Hydroxyapatite Layers Formed on Anodic Oxide Titanium Implants after Hydrothermal Treatment in a Rat Maxilla Model","authors":"S. Ito, J. Takebe","doi":"10.2186/PRP.7.82","DOIUrl":"https://doi.org/10.2186/PRP.7.82","url":null,"abstract":"Purpose: Highly crystalline thin hydroxyapatite (HA) layers deposited on the surface of commercially pure titanium (cpTi) by discharge anodic oxidation and hydrothermal treatment (SA treatment) enhance the value of cpTi as endosseous implants in clinical dentistry. In particular, the SA treatment affects the osteoconductive properties of cpTi. Determining whether this HA layer retains its chemical stability during osseous wound healing is crucial for its use in implants. In this study, we characterized the morphological, chemical, and structural features of HA layers on SA-treated cpTi implants in rat maxilla.Materials and methods: SA-treated cpTi implants (diameter: 1.0 mm, length: 2.0 mm) were placed in the maxilla of 8-week-old Wistar rats. After 14, 21, and 28 days, the maxilla were harvested and the implant surfaces were analyzed by scanning electron microscopy (SEM), electron probe microanalysis (EPMA), and x-ray photoelectron spectroscopy (XPS).Results: SEM analysis revealed precipitated HA crystals on the implant surface; the crystals had a typical single hexagonal columnar shape and they were highly crystalline. Implantation up to 28 days changed neither the morphology nor the crystalline features of the thin HA layer. EPMA revealed an even distribution of P and Ca in the HA layers before and after implantation in the maxilla, while XPS indicated no change in the binding energies of P and Ca in the HA crystals.Conclusion: The thin HA layer formed on the SA-treated cpTi implants remained stable during the process of jaw bone formation.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131566906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Functional Evaluation of Dental Implants after Socket Lift by Means of Osstell Osstell牙槽提升后种植体的功能评价

Prosthodontic Research & Practice Pub Date : 2008-07-01 DOI: 10.2186/PRP.7.213

Eikichi Matsumoto, Yukumi Nagata, Mitsuo Iwata, T. Etoh

引用次数: 0

Current Status of Prosthodontic Education in Japan 日本口腔修复教育现状

Prosthodontic Research & Practice Pub Date : 2008-07-01 DOI: 10.2186/PRP.7.113

K. Baba, T. Suganuma, K. Uoshima

引用次数: 0

Changes in Cerebral Function Associated with Oral Pain Caused by Dentures 假牙所致口腔疼痛的脑功能变化

Prosthodontic Research & Practice Pub Date : 2008-07-01 DOI: 10.2186/PRP.7.180

S. Kasahara, Toshinori Kato, K. Kimura

引用次数: 1

Clinical Evaluation of In-Ceram Crowns Fabricated Using GN-I System : Preliminary Results after 24-39 Months of Use gn - 1系统制备In-Ceram冠的临床评价:使用24-39个月的初步结果

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.265

Y. Kokubo, M. Tsumita, Yuki Nagayama, S. Sakurai, Samito Yamazaki, M. Kuga, C. Ohkubo, S. Fukushima

{"title":"Clinical Evaluation of In-Ceram Crowns Fabricated Using GN-I System : Preliminary Results after 24-39 Months of Use","authors":"Y. Kokubo, M. Tsumita, Yuki Nagayama, S. Sakurai, Samito Yamazaki, M. Kuga, C. Ohkubo, S. Fukushima","doi":"10.2186/PRP.6.265","DOIUrl":"https://doi.org/10.2186/PRP.6.265","url":null,"abstract":"Purpose: This study prospectively evaluated the clinical performance of CAD/CAM-generated In-Ceram alumina core crowns.Methods: The GN-I system was used to fabricate the 101 In-Ceram crowns with aluminum copings placed in 39 patients. Using a modified quality assessment system developed by the California Dental Association (CDA), the crowns were evaluated at baseline and at all follow-up examinations.Results: The mean service time of the crowns was 28.7 months. Six crowns fractured or were removed; a maxillary first molar crown and a mandibular second premolar crown fractured after 17 months and 22 months, respectively. Others were removed due to esthetic complications, endodontic therapy, root fracture, and so on. A small chip was detected in a mandibular canine crown after functioning for 6 months. After 39 months, the cumulative survival rate of the crowns was 93.9%. According to the modified CDA criteria, most crowns were rated as “satisfactory” during the observation period.Conclusion: Despite the 2 fractures, In-Ceram Alumina crowns with copings fabricated using CAD/CAM (GN-I system) showed excellent results during the observation period.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123690403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Guideline for Denture Relining 义齿修补指南

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.209

H. Shiga, Y. Terada, K. Ikebe, Y. Akagawa, T. Hirai, H. Inoue

{"title":"Guideline for Denture Relining","authors":"H. Shiga, Y. Terada, K. Ikebe, Y. Akagawa, T. Hirai, H. Inoue","doi":"10.2186/PRP.6.209","DOIUrl":"https://doi.org/10.2186/PRP.6.209","url":null,"abstract":"With the increasing attention to oral health in recent years, the number of residual teeth retained by individuals has been increasing with each generation. According to the survey of dental diseases in 2005, the percentage of individuals between 80 and 84 years of age retaining 20 or more teeth was 21.1%, thus exceeding 20% for the first time since this survey was started. The survey in 2005, however, showed that there was still a high percentage of individuals with multiple missing teeth, i.e., individuals using dentures. It is well known that the alveolar ridge inevitably undergoes resorption with advancing age, irrespective of whether or not the individual uses dentures. For this reason, dentures are destined to show deterioration in fit no matter how well they are initially prepared. Means available to deal with loss of denture fit are fabricating new dentures or relining. Relining can reduce the frequency of a patient’s visits and medical expenses as compared to fabricating new dentures. Under such circumstances, the Japan Prosthodontic Society decided to prepare relining guidelines. When preparing this set of guidelines, we followed the procedures for preparing evidencebased clinical practice guidelines. However, because of the specific nature of dental treatment and dentistry, it is difficult to conduct studies designed to provide the evidence for each treatment in this field. Because of these limitations, we prepared this set of guidelines on the basis of limited evidence obtained by searching for scientific papers and consensus among specialists. This guideline will have to be periodically modified when additional rationales or clinical findings are revealed in scientific clinical studies.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129695795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Professional Oral Health Care Frequency on the Dependent Elderly 专业口腔保健频率对赡养老年人的影响

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.225

Asako Tamaki, Kayoko Ito, A. Toyosato, S. Nomura

{"title":"The Effect of Professional Oral Health Care Frequency on the Dependent Elderly","authors":"Asako Tamaki, Kayoko Ito, A. Toyosato, S. Nomura","doi":"10.2186/PRP.6.225","DOIUrl":"https://doi.org/10.2186/PRP.6.225","url":null,"abstract":"Purpose: Our research aimed at shedding light on the effective frequency of professional oral care for those who require nursing care from oral health specialists.Methods: Thirty-eight residents (average age, 80.0±9.4 years) of Niigata Prefecture who required nursing care agreed to participate in our study. They were divided into 3 groups; a control group (13 persons), provided with no professional oral health care: Group A (15 persons), provided with professional oral care once or twice per month: and Group B (10 persons), provided with professional oral care 4 times per month (once a week). Three dentists investigated the general health status and oral conditions such as dental formula, gingivitis index (GI), gingival bleeding index (GBI), degree of coating of on the tongue, and the type of pneumonia-causing pathogens on the pharyngeal mucosa. Professional oral care was provided by 14 dental hygienists for 3 months.Results: Multiple comparison tests revealed that subjects in Group B showed a statistically significant improvement in GI and GBI compared to the controls. Although there was a trend showing some improvement associated with care frequency between pre- and post-intervention, no statistically significant difference was found eventually. Further, no significant difference was found before intervention with regard to the types of pneumonia-causing pathogens on the pharyngeal mucosa. Only Group B manifested a tendency of decreasing number pathogens when compared to the pre-intervention numbers, although it was not statistically significant.Conclusion: Considering the limited time, cost, and manpower, a frequency of 4 times per month may be the most effective, but a higher frequency is recommended to prevent inflammations of the respiratory system.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"98 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129623581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Relation Between the Piezoelectric Pulse Transducer Waveforms and Food Bolus Passage during Pharyngeal Phase of Swallow 咽部吞咽时压电脉冲传感器波形与食物丸通过的关系

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.272

A. Toyosato, S. Nomura, A. Igarashi, Naoko, A. Nomura

{"title":"A Relation Between the Piezoelectric Pulse Transducer Waveforms and Food Bolus Passage during Pharyngeal Phase of Swallow","authors":"A. Toyosato, S. Nomura, A. Igarashi, Naoko, A. Nomura","doi":"10.2186/PRP.6.272","DOIUrl":"https://doi.org/10.2186/PRP.6.272","url":null,"abstract":"Purpose: Since a Piezoelectric Pulse Transducer (PPT) detects finger peripheral pulse-waves, the PPT has already been used to simply record the laryngeal upward-downward movements. However, a relation between the sensor output and movements of the pharynx, larynx, and esophagus was not clear. This study was aimed to elucidate a relation between the PPT waveforms and food bolus passage during the pharyngeal phase of swallow. Methods: The laryngeal movements by the PPT, surface electromyography of the geniohyoideus muscle, and videofluorography were simultaneously recorded. To synchronize VF, the PPT waveforms, and EMG, we touched the neck surface lightly using a small metal ball both before and after swallowing, thereby putting marks on the VF and the waves of the PPT. Then, features in the waveform of the PPT were analyzed with a personal computer. Results: The swallowed food bolus was stopped for a moment on the epiglottic vallecula, as observed by VF. This stop was also observed in the PPT waveform as a return to the baseline. The epiglottis returned to the original position at the end of swallowing, as can be observed by VF and by a small peak in the PPT waveform. The food bolus passage was divided into two periods on the PPT waveform: TA (transit period from the base of the tongue to the epiglottic vallecula), and TB (transit period from the epiglottic vallecula to the esophagus). Conclusion: The PPT waveforms could detect bolus passage from the base of the tongue through the epiglottic vallecula to the esophagus.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129039573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Influence of Body and Head Posture on Deviation of the Incisal Point Undergoing Dental Treatment 体位和头位对牙科治疗中切牙点偏差的影响

Prosthodontic Research & Practice Pub Date : 2007-10-01 DOI: 10.2186/PRP.6.217

Mami Ishii, K. Koide, M. Ueki, Naoki Asanuma

{"title":"Influence of Body and Head Posture on Deviation of the Incisal Point Undergoing Dental Treatment","authors":"Mami Ishii, K. Koide, M. Ueki, Naoki Asanuma","doi":"10.2186/PRP.6.217","DOIUrl":"https://doi.org/10.2186/PRP.6.217","url":null,"abstract":"Purpose: The objectives of this study were to determine how changes in body and head position undergoing dental treatment affect mandibular position, and to develop a set of standards for patient posture.Methods: Mandibular position was investigated in 8 subjects with normal occlusion and not suffering any stomatognathic dysfunction. This was done by measuring the location of the tapping point on the incisal point using a Gnathohexagraph (a 3-dimensional jaw movement measurement device with 6 degrees of freedom), with the subject’s head in 4 different positions while sitting, and the body and head in 16 different positions with the subject supine, and then comparing deviation from the reference position in each of these positions. Statistical analysis of data was performed using first, repeated measures of 1-way ANOVA (α=.05), second Bonferroni’s multiple comparison test was undertaken in seated positions. In supine positions, repeated measures of 2-way ANOVA was performed, and followed by Bonferroni’s multiple comparison test was performed.Results: The incisal point deviated significantly in the anteroposterior direction due to changes in head and body position. With the subjects seated, the incisal point tended to move backwards when the subjects were asked to lean backwards from the reference position. The incisal point tended to move forward when the subjects were asked to lean forward. With the subjects in a supine position, the incisal point was inclined backwards. The degree of backwards inclination of the incisal point tended to decline as the head position was varied from 10 degrees backwards to 20 degrees forward, regardless of the degree of backwards inclination of the body.Conclusion: Changes in body and head posture undergoing dental treatment affect incisal point deviation.","PeriodicalId":306414,"journal":{"name":"Prosthodontic Research & Practice","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125122383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4