Ahmad Ghahremanloo, Mahdieh Seifi, Jalil Ghanbarzade, Seyyed Mohammad Abrisham, Rashid Abdolah Javan
{"title":"聚乙烯烷黏度对种植体印模精度的影响。","authors":"Ahmad Ghahremanloo, Mahdieh Seifi, Jalil Ghanbarzade, Seyyed Mohammad Abrisham, Rashid Abdolah Javan","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Objectives: </strong>The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS).</p><p><strong>Materials and methods: </strong>Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42). To measure the accuracy of impressions, drift, horizontal, and vertical angles of the implants, as well as the hex rotation of the implants in casts were evaluated using a digitizer device (1μm accuracy), in comparison with master arch. Data were analyzed using five-factor two-way ANOVA and Tukey's post-hoc test.</p><p><strong>Results: </strong>The accuracy of impressions was assessed and the results showed that direct technique was not significantly different from indirect technique (P>0.05). Also, there were no significant differences between the mentioned viscosities except for the horizontal angle (P=0.006).</p><p><strong>Conclusions: </strong>Viscosity of impression materials is of high significance for the accuracy of dental impressions.</p>","PeriodicalId":30286,"journal":{"name":"Journal of Dentistry of Tehran University of Medical Sciences","volume":"14 1","pages":"40-47"},"PeriodicalIF":0.0000,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5557995/pdf/","citationCount":"0","resultStr":"{\"title\":\"Effect of Polyvinyl Siloxane Viscosity on Accuracy of Dental Implant Impressions.\",\"authors\":\"Ahmad Ghahremanloo, Mahdieh Seifi, Jalil Ghanbarzade, Seyyed Mohammad Abrisham, Rashid Abdolah Javan\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objectives: </strong>The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS).</p><p><strong>Materials and methods: </strong>Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42). To measure the accuracy of impressions, drift, horizontal, and vertical angles of the implants, as well as the hex rotation of the implants in casts were evaluated using a digitizer device (1μm accuracy), in comparison with master arch. Data were analyzed using five-factor two-way ANOVA and Tukey's post-hoc test.</p><p><strong>Results: </strong>The accuracy of impressions was assessed and the results showed that direct technique was not significantly different from indirect technique (P>0.05). Also, there were no significant differences between the mentioned viscosities except for the horizontal angle (P=0.006).</p><p><strong>Conclusions: </strong>Viscosity of impression materials is of high significance for the accuracy of dental impressions.</p>\",\"PeriodicalId\":30286,\"journal\":{\"name\":\"Journal of Dentistry of Tehran University of Medical Sciences\",\"volume\":\"14 1\",\"pages\":\"40-47\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5557995/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Dentistry of Tehran University of Medical Sciences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Dentistry of Tehran University of Medical Sciences","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of Polyvinyl Siloxane Viscosity on Accuracy of Dental Implant Impressions.
Objectives: The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS).
Materials and methods: Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42). To measure the accuracy of impressions, drift, horizontal, and vertical angles of the implants, as well as the hex rotation of the implants in casts were evaluated using a digitizer device (1μm accuracy), in comparison with master arch. Data were analyzed using five-factor two-way ANOVA and Tukey's post-hoc test.
Results: The accuracy of impressions was assessed and the results showed that direct technique was not significantly different from indirect technique (P>0.05). Also, there were no significant differences between the mentioned viscosities except for the horizontal angle (P=0.006).
Conclusions: Viscosity of impression materials is of high significance for the accuracy of dental impressions.