{"title":"不同预备设计下拔牙结构的重量分析","authors":"Afnan F. Al-Fouzan","doi":"10.1016/j.sjdr.2015.03.004","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose</h3><p>To gravimetrically analyze the tooth reduction associated with different commonly used preparation designs in relation to coronal and radical parts of the tooth.</p></div><div><h3>Materials and methods</h3><p>Eighty extracted permanent human teeth (four different morphologies) were divided into eight groups according to tooth type and preparation design. Each specimen underwent a pre- and post-preparation gravimetric analysis. The mass of the tooth that was removed was analyzed. Descriptive statistics were used to compare the reduction in tooth mass by weight percent. Student’s <em>t</em>-test was used to compare the mean percentages of tooth reduction with a significance level of <em>P</em> <!--><<!--> <!-->.05.</p></div><div><h3>Results</h3><p>Significant differences in tooth reduction were noted between different types of crown coverage preparations. Complete-coverage (all-ceramic crown) preparations for mandibular first premolars required the greatest tooth reduction (40.01%). The least tooth reduction was associated with maxillary central incisors undergoing a ceramic veneer preparation (20.19%).</p></div><div><h3>Conclusion</h3><p>Tooth preparations for all-ceramic crowns require greater tooth reduction relative to ceramic veneers and onlays.</p></div>","PeriodicalId":101249,"journal":{"name":"The Saudi Journal for Dental Research","volume":"7 1","pages":"Pages 1-6"},"PeriodicalIF":0.0000,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.sjdr.2015.03.004","citationCount":"5","resultStr":"{\"title\":\"Gravimetric analysis of removed tooth structure associated with different preparation designs\",\"authors\":\"Afnan F. Al-Fouzan\",\"doi\":\"10.1016/j.sjdr.2015.03.004\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose</h3><p>To gravimetrically analyze the tooth reduction associated with different commonly used preparation designs in relation to coronal and radical parts of the tooth.</p></div><div><h3>Materials and methods</h3><p>Eighty extracted permanent human teeth (four different morphologies) were divided into eight groups according to tooth type and preparation design. Each specimen underwent a pre- and post-preparation gravimetric analysis. The mass of the tooth that was removed was analyzed. Descriptive statistics were used to compare the reduction in tooth mass by weight percent. Student’s <em>t</em>-test was used to compare the mean percentages of tooth reduction with a significance level of <em>P</em> <!--><<!--> <!-->.05.</p></div><div><h3>Results</h3><p>Significant differences in tooth reduction were noted between different types of crown coverage preparations. Complete-coverage (all-ceramic crown) preparations for mandibular first premolars required the greatest tooth reduction (40.01%). The least tooth reduction was associated with maxillary central incisors undergoing a ceramic veneer preparation (20.19%).</p></div><div><h3>Conclusion</h3><p>Tooth preparations for all-ceramic crowns require greater tooth reduction relative to ceramic veneers and onlays.</p></div>\",\"PeriodicalId\":101249,\"journal\":{\"name\":\"The Saudi Journal for Dental Research\",\"volume\":\"7 1\",\"pages\":\"Pages 1-6\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.sjdr.2015.03.004\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The Saudi Journal for Dental Research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S235200351500012X\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Saudi Journal for Dental Research","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S235200351500012X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Gravimetric analysis of removed tooth structure associated with different preparation designs
Purpose
To gravimetrically analyze the tooth reduction associated with different commonly used preparation designs in relation to coronal and radical parts of the tooth.
Materials and methods
Eighty extracted permanent human teeth (four different morphologies) were divided into eight groups according to tooth type and preparation design. Each specimen underwent a pre- and post-preparation gravimetric analysis. The mass of the tooth that was removed was analyzed. Descriptive statistics were used to compare the reduction in tooth mass by weight percent. Student’s t-test was used to compare the mean percentages of tooth reduction with a significance level of P < .05.
Results
Significant differences in tooth reduction were noted between different types of crown coverage preparations. Complete-coverage (all-ceramic crown) preparations for mandibular first premolars required the greatest tooth reduction (40.01%). The least tooth reduction was associated with maxillary central incisors undergoing a ceramic veneer preparation (20.19%).
Conclusion
Tooth preparations for all-ceramic crowns require greater tooth reduction relative to ceramic veneers and onlays.
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