Journal of Marmara University Dental Faculty最新文献_第3页

Effect of various demineralizing agents on mineral contents of cementum surfaces (an electron probe analysis). 各种脱矿剂对牙骨质表面矿物质含量的影响(电子探针分析)。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

G Atilla, H Baylas

{"title":"Effect of various demineralizing agents on mineral contents of cementum surfaces (an electron probe analysis).","authors":"G Atilla, H Baylas","doi":"","DOIUrl":"","url":null,"abstract":"The purpose of this investigation was to determine the surface morphology and mineral content of periodontally diseased cementum surfaces following root planing and conditioning with either citric acid, tetracycline HCL and minocycline HCL. Mineral contents of cementum surfaces were determined with an electron probe. All 3 demineralizing agents caused the exposure of the collagen matrix on the root surface but citric acid was the more effective. Calcium (Ca) and phosphorus (P) showed higher values in citric acid and minocycline HCL treated cementum surfaces compared to nondiseased cementum surfaces. The Ca and P were found to be in similar proportions in the tetracycline HCL treated group and nondiseased cementum surfaces. Although citric acid is a strong demineralizing agent, our specimens' cementum surfaces to which citric acid was treated showed high Ca and P content. In our opinion this difference about the effects of demineralizing agents on the surface morphology and surface element content was found to be related to the facts that whether the total amount of hypermineralized cementum as removed or not with root planing and the lacking criteria to detects the amount of this removal. Our findings suggest that these demineralizing agents can demineralize cementum surface after root planing but can not remove all of the hypermineralized diseased cementum. For this reason, it may be stated that it is more important to remove the pathologically altered cementum than applying various chemical agents.","PeriodicalId":77213,"journal":{"name":"Journal of Marmara University Dental Faculty","volume":"2 2-3","pages":"515-9"},"PeriodicalIF":0.0,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20490313","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

Evaluation of coronal microleakage of four different glass-ionomer cements in endodontically treated teeth. 四种不同玻璃离子胶合剂在牙髓治疗中冠状微渗漏的评价。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

G Görgül, K Dolar, M Uçtaşli, C Tinaz, F Cankaya, T Kinoğlu

引用次数: 0

A method for preparing collagen graft materials. 一种制备胶原移植材料的方法。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

A Yarat, F Ozçelik, N Emekli

引用次数: 0

Histobacteriology and pulp reactions to long-term dental restorations. 长期牙齿修复的组织细菌学和牙髓反应。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

A Zoellner, S Herzberg, P Gaengler

{"title":"Histobacteriology and pulp reactions to long-term dental restorations.","authors":"A Zoellner, S Herzberg, P Gaengler","doi":"","DOIUrl":"","url":null,"abstract":"The prevention of degeneration and necrosis of the endodont is one of the main goals of dental treatment. Kerschbaum and Voss (1979, 1981) described that 15% of teeth showed negative results to sensitivity testing 10 years after crown preparation. Pulpal responses to dental treatment depend on many factors including thermal injury, transsection of the odontoblastic process, vibration, desiccation of dentin, pulp exposure, smear layer, remaining dentin thickness and used materials. The knowledge concerning endodontic reactions in short and medium term observation is mainly based on research by Klötzer and Langeland. Histological assessment of reactions is a well accepted method for biocompatibility testing (i.e. ISO/TR 7405). It is consistent to apply its principles to the evaluation of endodontic reactions of teeth with long term restorations. As pulpal injury is furthermore due to microleakage between filling material and the wall of the cavity the analysis of infected dentin tubules seems to be important. A consideration of the location of the tubules and of the severity of the invasion is necessary. Using a classification (grade 1-6) comprising the parameters of degenerative and regenerative reactions and bacterial invasion, 24 teeth restored with different types of fixed prosthodontic restorations were investigated. The restorations were between 0-6, 7-12 and 13-18 years in situ. Serial sections (5 microns) were stained with haematoxylin-eosin, azan, according to Goldner and J. Hopkins. 22 of 24 teeth showed typical degenerative reactions. Negative sensitivity testing occurred in teeth with no pain and no or partial necrosis. The histobacteriological assessment showed bacterial invasion of the dentin tubules of 21 teeth. From this investigation it was concluded that the proposed classification shows sufficient sensitivity for the evaluation of progressive endodontic changes of long-term restored teeth. Furthermore it was shown that bacterial invasion must be considered as a possible co-factor for the described degenerative character of the pulpal tissue.","PeriodicalId":77213,"journal":{"name":"Journal of Marmara University Dental Faculty","volume":"2 2-3","pages":"483-90"},"PeriodicalIF":0.0,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20490309","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 relation of microbiologic data to aspartate aminotransferase enzyme activity in gingival crevicular fluid. 龈沟液中微生物学指标与天冬氨酸转氨酶活性的关系。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

B Kuru, U Noyan, S Yilmaz, T Kadir, O Acar, E Büget

{"title":"The relation of microbiologic data to aspartate aminotransferase enzyme activity in gingival crevicular fluid.","authors":"B Kuru, U Noyan, S Yilmaz, T Kadir, O Acar, E Büget","doi":"","DOIUrl":"","url":null,"abstract":"Gingival crevicular fluid (GCF), reflects the immune and inflammatory reactions and is itself a location for specific host-microbe interactions that lead to periodontal diseases. Aspartate aminotransferase (AST) is one of the components of GCF that is released as a result of cell death. In this study, 40 periodontal sites in 10 early onset periodontitis patients before and after nonsurgical periodontal therapy, with and without local metronidazole administration, were first examined for the AST enzyme levels in GCF and then evaluated for microbiological and clinical variables. In each patient, 4 sites (one site/quadrant) with a probing depth of > or = 5 mm were selected and treated with separate treatment protocols. Certain microbial species including Prevotella intermedia, Porphyromonas gingivalis, and Actinobacillus actinomycetemcomitans(A. a.) were found more often and/or in higher levels in AST active sites (36/40 first measurement--9/36 second measurement), while other species (Streptococcus and Actinomyces) were found more often and/or in higher levels in AST inactive sites (4/40 first measurement--8/36 second measurement). Eight post-treatment AST active sites revealed 1.5 mm of attachment loss, whereas 8 post-treatment AST inactive sites showed 1.37 mm of attachment gain. AST activity and microbiological-clinical data presenting such an agreement suggests that, AST level assessment would be beneficial as an adjunctive method alongside other clinical criteria, in guiding the clinician in periodontal treatment.","PeriodicalId":77213,"journal":{"name":"Journal of Marmara University Dental Faculty","volume":"2 2-3","pages":"491-9"},"PeriodicalIF":0.0,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20490310","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

In vivo and in vitro evaluation of marginal integrity in ceramic inlays. 陶瓷镶嵌体边缘完整性的体内和体外评价。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

D Gemalmaz, A Sertgöz, M Ozcan, A B Yoruç, H N Alkumru

{"title":"In vivo and in vitro evaluation of marginal integrity in ceramic inlays.","authors":"D Gemalmaz, A Sertgöz, M Ozcan, A B Yoruç, H N Alkumru","doi":"","DOIUrl":"","url":null,"abstract":"The marginal integrity is an important factor for the long-term success of ceramic inlays. The long term clinical performance of porcelain inlays depends on a number of factors of which the marginal adaptation is of significant interest. The aim of this study was to determine the margin quality of adhesively luted sintered porcelain inlays both in vivo and in vitro. MOD cavities without bevels were prepared on 10 extracted human mandibular molar teeth. Using the Ducera inlay system, inlays were fired on refractory dies and luted with a dual-curing composite resin. After polishing, each, tooth was sectioned in buccal/lingual and mesial/distal directions and marginal adaptation was assessed microscopically. The mean marginal gap of 78.77 +/- 14.85 microns recorded for occlusal margins was significantly smaller than that of 128.85 +/- 34.34 microns seen at the approximal margins. For in vivo evaluation, 25 fired porcelain inlays, including 7 onlays, were placed in Class II cavities. The assessment of the marginal adaptation of inlays was made according to the scaling system used by Aberg et al. (Acta Odontol Scand 1994; 52:140-149). In 19 of the clinical cases, the restoration was contiguous with the existing anatomic form. Both in vivo and in vitro evaluations showed the margin quality of porcelain inlays to be high.","PeriodicalId":77213,"journal":{"name":"Journal of Marmara University Dental Faculty","volume":"2 2-3","pages":"465-9"},"PeriodicalIF":0.0,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20491047","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 use of a resin-ionomer in varying restorative procedures: case reports. 树脂单体在不同修复过程中的应用:病例报告。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

W Scherer

{"title":"The use of a resin-ionomer in varying restorative procedures: case reports.","authors":"W Scherer","doi":"","DOIUrl":"","url":null,"abstract":"Unlabelled: The purpose of this paper is to describe the subgingival placement of a resin-ionomer for several restorative procedures, namely, root resorption, endodontic perforation, and root fracture. After endodontic therapy, a combination scallop flap (in attached gingiva)-full thickness flap (at affected tooth only) was raised to gain access to the lesion and root defect. The root defects were prepared with ultra-sonic instruments under an operating microscope and the preparations treated with Tenure Dentin Conditioner (DenMat Corporation, Santa Maria, CA). The preparations were washed and lightly air-dried, and the Tenure All-Purpose Bonding System (Den Mat Corporation, Santa Maria, CA) was placed in the prepared areas. Geristore resin-ionomer (DenMat Corporation, Santa Maria, CA) was then syringed into the preparations and either light-activated or allowed to undergo a chemical set. Once set, the material was finished with fine diamonds under water spray. The flap was then sutured to place with Gore-Tex sutures when a non-resorbable Gore-Tex membrane (Gore Corporation, Flagstaff, AZ) was used or 4-0 nylon sutures when resorbable Guidor membranes (Butler Company, Bensenville, IL) were used. The sutures were removed after two days. The patients were observed weekly for the first month and then monthly until released. No untoward effects have been observed during the time frame of this project. All of the cases have been responding satisfactorily.Clinical significance: The cases presented indicate that a resin ionomer, Geristore, may be used as a subgingival restorative, and may be placed in lesions thought to be unrestorable. Thus, teeth may be saved that were previously designated to be extracted.","PeriodicalId":77213,"journal":{"name":"Journal of Marmara University Dental Faculty","volume":"2 2-3","pages":"479-82"},"PeriodicalIF":0.0,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20491050","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

Salivary sialic acid and cancer. 唾液酸与癌症。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

L Koç, A Yarat, N Emekli, S Serdengeçti, B Berkarda

引用次数: 0

An investigation of the effects of the local use of 1:25 dihydroxycholecalciferol (1:25 D) on tension sites during experimental tooth movement in rats. 局部使用1:25二羟基胆骨化醇(1:25 D)对大鼠实验性牙齿运动中张力部位影响的研究。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

S Baran, O Hamamci, M Akalar

引用次数: 0

Nonenzymatic glycosylation of tissue and blood proteins. 组织和血液蛋白的非酶糖基化。

Journal of Marmara University Dental Faculty Pub Date : 1996-09-01

N Emekli

{"title":"Nonenzymatic glycosylation of tissue and blood proteins.","authors":"N Emekli","doi":"","DOIUrl":"","url":null,"abstract":"A brief description of the phenomenon of nonenzymatic glycosylation will be presented, some examples given from the literature and then a brief summary of the results of laboratory research conducted in this area by myself and coworkers since 1981. Excessive glycosylation causes undesirable changes in proteins. Such glycosylation also occurs to collagen in oral tissue. In a study on induced experimental diabetes in rats we observed a defective platelet aggregation curve for gingival collagen. Glycosylation of proteins is known to result in functional defects, for example hemoglobin acquires an increased affinity for oxygen. Glycosylation of rat and bovine lens crystallins has been reported as being an important genesis of cataracts in diabetes. Increased glycosylation of submandibular collagen has been shown to occur in diabetes. However collagen from normal subjects has also been found to show an age related advanced glycosylation end product pigment. Increased platelet membrane protein glycosylation has been reported and the hyperaggregation typically observed in these cases thought to be due to glycosylation. The presence of red cell membrane proteins has also been reported and the impairment of red cell function in diabetes has been reported in cases of excessive glycosylation. According to some investigators cataract formation is prevented by some specific drug which inhibits the glycosylation of lens crystallins. Vitamin C has lowering effects on nonenzymatic glycation. Dentists should take into account the possibility of glycosylation of oral proteins such as collagen in cases of impaired gingiva tooth connection.","PeriodicalId":77213,"journal":{"name":"Journal of Marmara University Dental Faculty","volume":"2 2-3","pages":"530-4"},"PeriodicalIF":0.0,"publicationDate":"1996-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20491534","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