Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study
Dentin is the fundamental substrate of restorative dentistry and its properties and characteristics are key determinants of nearly all restorative, preventive and disease processes of the teeth. The intrinsic permeability of dentin is responsible for permitting bacterial or chemical substances to di...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2010-09-01
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| Series: | Journal of Indian Society of Pedodontics and Preventive Dentistry |
| Subjects: | |
| Online Access: | http://www.jisppd.com/article.asp?issn=0970-4388;year=2010;volume=28;issue=3;spage=167;epage=172;aulast=Chowdhary |
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| author | Chowdhary N Subba Reddy V |
| author_facet | Chowdhary N Subba Reddy V |
| author_sort | Chowdhary N |
| collection | DOAJ |
| description | Dentin is the fundamental substrate of restorative dentistry and its properties and characteristics are key determinants of nearly all restorative, preventive and disease processes of the teeth. The intrinsic permeability of dentin is responsible for permitting bacterial or chemical substances to diffuse across the dentin and irritate the pulpal and periradicular tissues. Improved understanding of the dentin structure and nature will have important consequences for today′s dental procedures. The aims of the study were to observe the direction of dentinal tubules, interglobular dentin, incremental lines of dentin and the dead tracts. <b>Materials and Methods:</b> A total of 30 teeth (15 primary and 15 permanent molars), unrestored, noncarious, hypoplastic extracted molars were used. Longitudinal ground sections of teeth were obtained using hard tissue microtome. <b>Results:</b> Examination of ground sections of the primary teeth dentin showed "<i>s</i>"-shaped curvature in four (26.7%) specimens and a straight course of dentinal tubules in 11 (73.3%) specimens out of 15 teeth examined whereas in permanent teeth, all 15 (100%) specimens showed an "<i>s</i>"-shaped curvature. These results are statistically highly significant (P < 0.001). <b>Conclusion:</b> Dentinal tubules followed an "<i>s</i>"-shaped course in all the 15 (100%) permanent molars and in four (26.7%) primary molars. There was no significant difference in the occurrence of interglobular dentin of primary and permanent molars. But, they were at angles in the primary teeth. |
| first_indexed | 2024-12-23T05:12:16Z |
| format | Article |
| id | doaj.art-1739431699a04127936444eecb7f798b |
| institution | Directory Open Access Journal |
| issn | 0970-4388 1998-3905 |
| language | English |
| last_indexed | 2024-12-23T05:12:16Z |
| publishDate | 2010-09-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Indian Society of Pedodontics and Preventive Dentistry |
| spelling | doaj.art-1739431699a04127936444eecb7f798b2022-12-21T17:58:56ZengWolters Kluwer Medknow PublicationsJournal of Indian Society of Pedodontics and Preventive Dentistry0970-43881998-39052010-09-01283167172Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> studyChowdhary NSubba Reddy VDentin is the fundamental substrate of restorative dentistry and its properties and characteristics are key determinants of nearly all restorative, preventive and disease processes of the teeth. The intrinsic permeability of dentin is responsible for permitting bacterial or chemical substances to diffuse across the dentin and irritate the pulpal and periradicular tissues. Improved understanding of the dentin structure and nature will have important consequences for today′s dental procedures. The aims of the study were to observe the direction of dentinal tubules, interglobular dentin, incremental lines of dentin and the dead tracts. <b>Materials and Methods:</b> A total of 30 teeth (15 primary and 15 permanent molars), unrestored, noncarious, hypoplastic extracted molars were used. Longitudinal ground sections of teeth were obtained using hard tissue microtome. <b>Results:</b> Examination of ground sections of the primary teeth dentin showed "<i>s</i>"-shaped curvature in four (26.7%) specimens and a straight course of dentinal tubules in 11 (73.3%) specimens out of 15 teeth examined whereas in permanent teeth, all 15 (100%) specimens showed an "<i>s</i>"-shaped curvature. These results are statistically highly significant (P < 0.001). <b>Conclusion:</b> Dentinal tubules followed an "<i>s</i>"-shaped course in all the 15 (100%) permanent molars and in four (26.7%) primary molars. There was no significant difference in the occurrence of interglobular dentin of primary and permanent molars. But, they were at angles in the primary teeth.http://www.jisppd.com/article.asp?issn=0970-4388;year=2010;volume=28;issue=3;spage=167;epage=172;aulast=ChowdharyDentinal tubulesincremental linesinterglobular dentin |
| spellingShingle | Chowdhary N Subba Reddy V Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study Journal of Indian Society of Pedodontics and Preventive Dentistry Dentinal tubules incremental lines interglobular dentin |
| title | Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study |
| title_full | Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study |
| title_fullStr | Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study |
| title_full_unstemmed | Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study |
| title_short | Dentin comparison in primary and permanent molars under transmitted and polarised light microscopy: An <i>in vitro</i> study |
| title_sort | dentin comparison in primary and permanent molars under transmitted and polarised light microscopy an i in vitro i study |
| topic | Dentinal tubules incremental lines interglobular dentin |
| url | http://www.jisppd.com/article.asp?issn=0970-4388;year=2010;volume=28;issue=3;spage=167;epage=172;aulast=Chowdhary |
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