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Deutsche zahnarztliche Zeitschrift最新文献

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[The dimensional stability of hydrophilic impression materials after application of a disinfectant]. [使用消毒剂后亲水压印材料的尺寸稳定性]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
R Stoll, F Segschneider, V Stachniss, R Jürgensen
{"title":"[The dimensional stability of hydrophilic impression materials after application of a disinfectant].","authors":"R Stoll,&nbsp;F Segschneider,&nbsp;V Stachniss,&nbsp;R Jürgensen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The influence of a disinfectant solution containing glutaraldehyde on the dimensional stability of 2 alginate and 4 elastomeric impression materials has been investigated. Die models were measured using a computer-controlled method and compared to the master die to assess the three-dimensional change in the impression material. After an immersion time of 10 min, a dimensional change did not occur. When using immersion times longer than 10 min, the accuracy of the alginate materials was generally more affected by the disinfecting solution than that of the elastomeric impression materials.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12979417","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
[Tensile strength of the bond to In-ceram after varying modes of surface conditioning]. [不同表面处理模式后与In-ceram的粘结强度]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
M Kern, M J Neikes, J R Strub
{"title":"[Tensile strength of the bond to In-ceram after varying modes of surface conditioning].","authors":"M Kern,&nbsp;M J Neikes,&nbsp;J R Strub","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The tensile bond strengths of six different resin-bonding-systems to the aluminium oxide ceramic In-Ceram were tested. The samples were stored in artificial saliva (37 degrees C) up to 150 days and thermocycled (5 degrees-55 degrees C, 18,750 cycles). After sandblasting or silicoating of In-Ceram the tensile bond strength of the modified Bis-GMA resin Panavia-Ex showed no significant changes within this observation period. Using the conventional Bis-GMA resin Microfill-pontic, silicoating In-Ceram with the Rocatec-system resulted in a better bond strength than the use of a silane. The used etching procedure with boiling 70% sulphuric acid was proven to be unsuitable for a long-term stable bond.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12980796","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
[Results of functional activator treatment of collum fractures in the growth period]. [功能激活剂治疗成长期脊柱骨折的结果]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
K U Schendel, A Wiesinger, G Gademann, G Komposch
{"title":"[Results of functional activator treatment of collum fractures in the growth period].","authors":"K U Schendel,&nbsp;A Wiesinger,&nbsp;G Gademann,&nbsp;G Komposch","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>29 children aged between 2 and 16 and suffering from fractures of the condylar process were treated by functional appliances, 15 of them received previous intermaxillary wiring. Clinical and radiological reexamination including nuclear magnetic resonance tomography of the TMJ revealed good results for the use of functional appliances without previous immobilization.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12979419","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
[Mechanical strength of ceramic materials for fusing on titanium restorations]. [用于钛修复体熔合的陶瓷材料机械强度]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
M C Sommer, H Schwickerath, R Marx, G Witt
{"title":"[Mechanical strength of ceramic materials for fusing on titanium restorations].","authors":"M C Sommer,&nbsp;H Schwickerath,&nbsp;R Marx,&nbsp;G Witt","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Bending, splitting tensile, and bond strengths of four ceramic systems for veneering titanium frameworks as well as the fatigue strength of the complete metal-ceramic crown were evaluated. The mechanical properties of ceramo-metallic systems are comparable with those of conventional dental ceramics. A slight increase in bending, tensile, and bond strengths when using higher firing temperatures was observed, although this did not result in an increased endurance strength of the complete system.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12980792","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
[Differential diagnosis of electronic TMJ tracings in dysfunction patients]. [功能障碍患者TMJ电子示踪的鉴别诊断]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
W Lückerath
{"title":"[Differential diagnosis of electronic TMJ tracings in dysfunction patients].","authors":"W Lückerath","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Only in a minority of cases do electronic TMJ tracings allow a clear differentiation between arthrogenous dysfunctions. To us, the major application of this recording technique appears to be the diagnosis of dislocations of the articular disk. Because of the great variability of possible dislocation patterns it is mandatory that the interpretation of electronic jaw tracings be standardized to avoid contradictory interpretations and to enhance the validity of this diagnostic tool. In trying to establish reliable, hardware-independent criteria for the evaluation of joint tracings in TMJ dysfunctions, it is the shape of the condylar inclination, the time-correlation of condylar path changes in all three planes and the direction of these changes, that are of utmost diagnostic significance: Repeated recordings of all functional movements are necessary to ensure tracings of high diagnostic value. The diagnostic potential of three-dimensional electronic jaw tracings can be further enhanced by guided jaw movements, e.g. functional compression, which result in characteristic changes of the tracings.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12979418","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
[Nickel release of dental alloys as a function of the pH value of the corrosive solution]. [牙科合金中镍的释放与腐蚀溶液pH值的关系]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
P Pfeiffer, H Schwickerath
{"title":"[Nickel release of dental alloys as a function of the pH value of the corrosive solution].","authors":"P Pfeiffer,&nbsp;H Schwickerath","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Ni-59-65Cr26-23Mo11-9 alloys released distinctly lower quantities of nickel in lactic acid/saline solutions at pH 2.3, 4.2, or 6.5 than type Ni66-85Cr15-13Mo7-0 alloys for a period of 1 day and, subsequently, periods of 3 days over a total period of 33 days. While nickel solubility was similarly high at pH 2.3 and 4.2 (varying between 0.1 microns/cm2 d and 222 microns/cm2 d depending on the type of alloy), a maximum of 2 microns/cm2 d of nickel dissolved from all tested alloys at a pH value of 6.5.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12980794","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
[Corrosion behavior of dental alloys coated with titanium niobium oxinitride]. [氧化铌钛涂层牙科合金的腐蚀行为]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
R Thull
{"title":"[Corrosion behavior of dental alloys coated with titanium niobium oxinitride].","authors":"R Thull","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Dental alloys coated with (Ti,Nb)ON using the ion are PVD technique exhibit galvanic corrosion current densities of considerably less than Jg = 1 microA/cm2. These measurements were taken on plane surfaces. The results show no signs of local corrosion, which might impair the long-term intraoral stability of dental constructions or the health of the patients. Irrespective of the dental alloys used, the coatings exhibit pores extending down to the alloy. The alloy thus wetted on the one hand, and the coated areas on the other, act as galvanic elements with high source resistances and very low short circuit currents. It may therefore be concluded that the coating will effectively reduce allergic reactions to the components of the dental alloys.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12979416","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
[Does temporary cementing have an effect on the bond strength of definitively cemented crowns?]. 临时固井是否会影响最终固井冠的粘结强度?
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
H Stark
{"title":"[Does temporary cementing have an effect on the bond strength of definitively cemented crowns?].","authors":"H Stark","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>To establish whether or not temporary cementing with zinc oxide-eugenol (ZOE) cement affects the bond strength of the subsequent zinc phosphate cement, 60 standardized metal blocks with cylindrical drill holes were produced. 50 specimens were coated with ZOE cement and subjected to different cleansing techniques (mechanical, with alcohol or organic solvent, soap, Al2O3) in groups of ten. After examination of the cleansed surfaces under the light microscope, amalgam cylinders manufactured according to a standardized procedure were cemented into the cavities using zinc phosphate cement and pressed out. Only the Al2O3 jet-cleaned surfaces were free of ZOE cement residues. With high statistical significance the knock-through test revealed lower bonding strength values for the specimens cleaned either with alcohol or organic solvents.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12979913","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
[Frequency of tooth agenesis in CLP patients with eruption of all four third molars]. 【四颗第三磨牙全部萌出的CLP患者牙齿发育不全的发生率】。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
P Roth, U Hirschfelder
{"title":"[Frequency of tooth agenesis in CLP patients with eruption of all four third molars].","authors":"P Roth,&nbsp;U Hirschfelder","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Tooth agenesis was investigated in 101 patients with complete unilateral or bilateral cleft lip and palate presenting four third molars. The prevalence was found to be six times higher than in the control group. The most commonly missing teeth were the upper second premolars and the upper lateral incisors. With the exception of one patient, tooth agenesis in the mandible was only found in combination with congenital absence of teeth in the maxilla.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12980789","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
[Ceramo-metallic bond of cast titanium]. [铸造钛的陶瓷金属结合]。
Deutsche zahnarztliche Zeitschrift Pub Date : 1991-11-01
K Böning, M Walter
{"title":"[Ceramo-metallic bond of cast titanium].","authors":"K Böning,&nbsp;M Walter","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The ceramo-metallic bond strength of cast titanium was tested according to DIN draft 13927. While the specimens failed in the bending tests, they clearly passed the 3-point bending test after removal of the surface reaction layer prior to firing. Light microscopy and SEM showed a satisfactory wetting of the titanium surface by the ceramic material. The result of X-ray analyses suggest that titanium particles are retained in the ceramic material when this layer is broken off its metallic substructure.</p>","PeriodicalId":11244,"journal":{"name":"Deutsche zahnarztliche Zeitschrift","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12980793","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
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