The Journal of prosthetic dentistry最新文献

{"title":"Use of a cross-mounting buccal index to help transfer the spatial relationships of an interim prosthesis to the definitive implant-supported prosthesis.","authors":"N. Chaimattayompol, J. Stanescu, J. Steinberg, T. Vergo","doi":"10.1067/MPR.2001.115387","DOIUrl":"https://doi.org/10.1067/MPR.2001.115387","url":null,"abstract":"This article describes a new method for the fabrication of an index for definitive implant abutment selection, framework design, and fabrication. After the interim removable restoration is esthetically and functionally accepted by the patient and dentist, it can be used as a surgical guide during implant placement as well as a guide for abutment selection, framework design, and fabrication. The concepts used in the fabrication of the cross-mounting buccal index include having a reference point, maintaining the vertical dimension of occlusion, and supplying the ability for cross mounting. This procedure allows the clinician to use a duplicate of the interim restoration to select the abutments and fabricate the framework without a new denture setup. It also accelerates both patient chairtime and laboratory time, and it enhances the prosthodontic outcome.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"119307806","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}

{"title":"In vitro TNF-alpha release from THP-1 monocytes in response to dental casting alloys exposed to lipopolysaccharide.","authors":"S. Nelson, J. Wataha, R. Cibirka, P. Lockwood","doi":"10.1067/MPR.2001.115276","DOIUrl":"https://doi.org/10.1067/MPR.2001.115276","url":null,"abstract":"STATEMENT OF PROBLEM\u0000Studies have found that lipopolysaccharide (LPS) attaches to and is eluted from dental alloys, but the biologic effects of LPS are not known.\u0000\u0000\u0000PURPOSE\u0000This study evaluated the ability of dental casting alloys pre-exposed to LPS to activate human monocytes with and without subsequent elution of the LPS.\u0000\u0000\u0000MATERIAL AND METHODS\u0000Eight types of casting alloys (n = 6 specimens per type) were exposed to LPS (Escherichia coli @ 100 micrograms/mL) for 24 hours. Controls were not exposed to LPS. Teflon (Tf) (+/- LPS) served as the material control. Treated alloys were transferred to THP-1 human monocytes for 24 hours or placed into phosphate-buffered saline (PBS) solution for 120 hours before monocyte exposure. Monocyte activation was assessed by tumor necrosis factor alpha (TNF-alpha) secretion into the medium. Alloys without LPS, with LPS but without PBS elution, and with LPS and elution were compared with ANOVA and Turkey intervals (alpha=.05).\u0000\u0000\u0000RESULTS\u0000Specimens without LPS exposure but with elution caused no detectable TNF-alpha secretion from monocytes. Specimens without elution into PBS caused low-to-moderate TNF-alpha secretion, indicating a possible false-positive result from the alloy conditioning solution used. After LPS exposure but no elution, high levels of TNF-alpha were found. When alloys were eluted for 120 hours after LPS exposure, there was no detectable TNF-alpha released.\u0000\u0000\u0000CONCLUSION\u0000In this in vitro system as in past studies, LPS appeared to adhere to and elute from the alloys. Monocytes were activated initially but not after elution into PBS for 120 hours. Alloy conditioning solutions may also have an artifactual effect on cytokine release.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128201213","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}

{"title":"A vibratory stimulation-based inhibition system for nocturnal bruxism: a clinical report.","authors":"Tatsutomi Watanabe, Kazuyoshi Baba, Kensuke Yamagata, Takashi Ohyama, Glenn T. Clark","doi":"10.1067/MPR.2001.114270","DOIUrl":"https://doi.org/10.1067/MPR.2001.114270","url":null,"abstract":"For the single subject tested to date, the bruxism-contingent vibratory-feedback system for occlusal appliances effectively inhibited bruxism without inducing substantial sleep disturbance. Whether the reduction in bruxism would continue if the device no longer provided feedback and whether the force levels applied are optimal to induce suppression remain to be determined.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128399728","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}

{"title":"Simplified procedure for preparing removable dies.","authors":"L. Thornton","doi":"10.1067/MPR.2001.114272","DOIUrl":"https://doi.org/10.1067/MPR.2001.114272","url":null,"abstract":"VOLUME 85 NUMBER 3 The dual-arch impression technique has become a popular procedure for quadrant dentistry.1,2 The simple hinge articulator is considered the most practical choice for single and short-span restorations.3 Unfortunately, preparing a working cast with removable dies can be time-consuming and susceptible to technique errors. This tip describes a laboratory procedure that is consistently successful, simple, and accurate. It allows crowns to be made with ideal contacts and minimal adjustments.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126564637","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}

{"title":"Procera AllCeram laminates: a clinical report.","authors":"B. Hager, A. Odén, B. Andersson, L. Andersson","doi":"10.1067/MPR.2001.114269","DOIUrl":"https://doi.org/10.1067/MPR.2001.114269","url":null,"abstract":"The use of Procera AllCeram laminates for patients with discolored teeth has been described. In our experience, these laminates are simple to use and provide possibilities for excellent esthetics.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"118852347","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}

{"title":"Procedure for occlusal refinement of mounted definitive casts to reduce clinical time required for adjustment of occlusion.","authors":"L. G. Loos, H. Boyarsky, D. Quiring","doi":"10.1067/MPR.2001.114271","DOIUrl":"https://doi.org/10.1067/MPR.2001.114271","url":null,"abstract":"The dental technician works with rigid casts and dies that do not tip or depress. The dentist must use fixed prostheses that have been fabricated in a laboratory setting in a clinical environment that is significantly different. Periodontal ligaments permit individual teeth to move within their boney housing. Mandibles tip and bend, but articulators cannot simulate all this activity. A relatively simple technique for adjusting inclines on the mounted definitive and opposing casts can compensate for many of the differences between rigid casts and subtle clinical tooth movement. This procedure can reduce required chairtime for adjusting the occlusion on crowns and fixed partial dentures.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125317687","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}

{"title":"In vitro microleakage of luting cements and crown foundation material.","authors":"T. Lindquist, J. Connolly","doi":"10.1067/MPR.2001.113705","DOIUrl":"https://doi.org/10.1067/MPR.2001.113705","url":null,"abstract":"STATEMENT OF PROBLEM\u0000Microleakage is a concern for the long-term prognosis of a cemented crown and foundation.\u0000\u0000\u0000PURPOSE\u0000The aims of this investigation were, first, to evaluate microleakage of zinc phosphate cement and resin-reinforced glass ionomer cement under ideal (dry) versus contaminated (wet) conditions, and second, to compare 3 foundations under both ideal and contaminated conditions.\u0000\u0000\u0000MATERIAL AND METHODS\u0000One hundred forty extracted molar teeth were cleaned and mounted. Tooth preparations for complete veneer cast crowns were completed with a chamfer finish line. A mesial surface class II cavity preparation 4 mm wide buccolingually and 2 mm deep was made in each tooth. Seven restorative groups were formed: amalgam/cavity varnish, amalgam/dentinal bonding agent, and composite/dentinal bonding agent, each with dry and contaminated groups, and a seventh group of class II cavity preparations without foundations. Finish lines for crown margins were refined 1.5 mm gingival to the restoration. Artificial crowns were cast in type III gold. Treatment groups were divided into 4 cement groups: dry and contaminated zinc phosphate cement and dry and contaminated resin-reinforced glass ionomer cement. The specimens were thermocycled and immersed in erythrosine B solution for 24 hours. Subsequently, they were rinsed, and their coronal portions were embedded in clear resin. Teeth were sectioned mesiodistally, and standard photomicrographs were made. The microleakage of each restoration and crown was measured.\u0000\u0000\u0000RESULTS\u0000The least foundation microleakage was recorded for amalgam/dentinal bonding agents (ideal group) and composite/dentinal bonding agents (ideal group). The most microleakage was observed within the group without a foundation. In cement groups, the control and experiment sides were evaluated separately but displayed the same order of finding. The least leakage was recorded with resin-reinforced glass ionomer cement (ideal group); the most microleakage was noted with zinc phosphate cement (ideal group). An interaction was demonstrated on the experimental side between cements and the foundations (P=.0001).\u0000\u0000\u0000CONCLUSION\u0000Within the experimental conditions of this study, less microleakage was recorded with resin-reinforced glass ionomer cement (ideal or contaminated) than with zinc phosphate cement (ideal or contaminated). There also was less microleakage evident with a foundation of silver amalgam or composite when a dentinal bonding agent was used under ideal conditions.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124575428","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}

{"title":"Masticatory muscle activity assessment and reliability of a portable electromyographic instrument.","authors":"J. Bowley, D. Marx","doi":"10.1067/MPR.2001.114142","DOIUrl":"https://doi.org/10.1067/MPR.2001.114142","url":null,"abstract":"STATEMENT OF PROBLEM\u0000Masticatory muscle hyperactivity is thought to produce muscle pain and tension headaches and can cause excessive wear or breakage of restorative dental materials used in the treatment of prosthodontic patients. The quantification and identification of this type of activity is an important consideration in the preoperative diagnosis and treatment planning phase of prosthodontic care.\u0000\u0000\u0000PURPOSE\u0000This study investigated the quantification process in complete denture/overdenture patients with natural mandibular tooth abutments and explored the reliability of instrumentation used to assess this parafunctional activity.\u0000\u0000\u0000MATERIAL AND METHODS\u0000The nocturnal EMG activity in asymptomatic complete denture/overdenture subjects was assessed with and without prostheses worn during sleep. Because of the large variance within and between subjects, the investigators evaluated the reliability of the 3 instruments used to test nocturnal EMG activity in the sample.\u0000\u0000\u0000RESULTS\u0000Electromyographic activity data of denture/overdenture subjects revealed no differences between prostheses worn versus not worn during sleep but demonstrated a very large variance factor. Further investigation of the instrumentation demonstrated a consistent in vitro as well as in vivo reliability in controlled laboratory studies.\u0000\u0000\u0000CONCLUSION\u0000The portable EMG instrumentation used in this study revealed a large, uncontrollable variance factor within and between subjects that greatly complicated the diagnosis of parafunctional activity in prosthodontic patients.","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"266 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117761908","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}

{"title":"Residual dentin thickness in mandibular premolars prepared with gates glidden and ParaPost drills.","authors":"R. Pilo, A. Tamse","doi":"10.1016/S0022-3913(00)70059-X","DOIUrl":"https://doi.org/10.1016/S0022-3913(00)70059-X","url":null,"abstract":"","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120426277","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}

{"title":"Implant stability related to insertion torque force and bone density: An in vitro study.","authors":"J. Tricio, D. van Steenberghe, D. Rosenberg, L. Duchateau","doi":"10.1097/00008505-199600530-00031","DOIUrl":"https://doi.org/10.1097/00008505-199600530-00031","url":null,"abstract":"Seventy-five implants were installed in 12 fresh ethanol-treated bovine ribs by use of a torque gauge manometer to measure the force needed to screw the implants fully into the bone. Digital radiographs were taken and a density histogram of the bone at the implant/bone interface was obtained. The damping characteristics of the implant/bone interface were assessed by tapping the abutment with the Periotest (PT) device. Abutments of several lengths screwed at 20 N/cm were used to conduct PT measurements and the PT values (PTVs) were related to the insertion torque force, the bone density, and implant and abutment length. The results indicated that high correlations exist between PTVs and insertion torque force (R value -0.74579), and PTVs and bone density (R value -0.83031). There was also a significant difference (p 0.001) among the PTVs of the different abutment lengths used. Implant length did not demonstrate influence on PTVs (p 0.3847).","PeriodicalId":185384,"journal":{"name":"The Journal of prosthetic dentistry","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133837044","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}