Comprehensive intermaxillary tooth width proportion of Bangkok residents
Proper occlusion depends on the correct width ratio between upper and lower teeth, known as Bolton's ratio. In fact, this ratio can be calculated for each pair of teeth from the central incisor to the first permanent molar. This set of ratios, known as comprehensive cumulative percentage ratios...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Pesquisa Odontológica
2011-04-01
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| Series: | Brazilian Oral Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000200005 |
| _version_ | 1819200035928145920 |
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| author | Somchai Manopatanakul Narumon Watanawirun |
| author_facet | Somchai Manopatanakul Narumon Watanawirun |
| author_sort | Somchai Manopatanakul |
| collection | DOAJ |
| description | Proper occlusion depends on the correct width ratio between upper and lower teeth, known as Bolton's ratio. In fact, this ratio can be calculated for each pair of teeth from the central incisor to the first permanent molar. This set of ratios, known as comprehensive cumulative percentage ratios (CPRs), can be used not only to determine which tooth or teeth have a tooth width discrepancy, but can also enable the partial graphical analysis of tooth width discrepancy when there is agenesis of certain permanent teeth. Although CPRs have been calculated for Caucasians, tooth width is known to vary depending on racial origin. Therefore, a test of differences between racial groups should be carried out. If these ratios of the Caucasians and Bangkokians are significantly different, the ratio of the Bangkokians is recommended. The objective of this study was to measure tooth size disproportion for Thai patients and to calculate a corresponding set of CPRs. Thirty-seven pairs of dental models were made from a group of Bangkok residents with normal occlusion. Mesiodistal tooth width was measured for each model. The intra- and inter-examiner measurement errors were ascertained as insignificant (p > 0.05). CPRs were then calculated and compared to those derived from other studies. Ten of thirteen CPRs were significantly different from corresponding values derived from Caucasians. We conclude that tooth width ratios vary between different racial groups, and therefore that these should be calculated specifically for each patient racial group. |
| first_indexed | 2024-12-23T03:25:50Z |
| format | Article |
| id | doaj.art-603b4d6b84994b209938182da260fff1 |
| institution | Directory Open Access Journal |
| issn | 1806-8324 |
| language | English |
| last_indexed | 2024-12-23T03:25:50Z |
| publishDate | 2011-04-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj.art-603b4d6b84994b209938182da260fff12022-12-21T18:01:50ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1806-83242011-04-0125212212710.1590/S1806-83242011000200005Comprehensive intermaxillary tooth width proportion of Bangkok residentsSomchai ManopatanakulNarumon WatanawirunProper occlusion depends on the correct width ratio between upper and lower teeth, known as Bolton's ratio. In fact, this ratio can be calculated for each pair of teeth from the central incisor to the first permanent molar. This set of ratios, known as comprehensive cumulative percentage ratios (CPRs), can be used not only to determine which tooth or teeth have a tooth width discrepancy, but can also enable the partial graphical analysis of tooth width discrepancy when there is agenesis of certain permanent teeth. Although CPRs have been calculated for Caucasians, tooth width is known to vary depending on racial origin. Therefore, a test of differences between racial groups should be carried out. If these ratios of the Caucasians and Bangkokians are significantly different, the ratio of the Bangkokians is recommended. The objective of this study was to measure tooth size disproportion for Thai patients and to calculate a corresponding set of CPRs. Thirty-seven pairs of dental models were made from a group of Bangkok residents with normal occlusion. Mesiodistal tooth width was measured for each model. The intra- and inter-examiner measurement errors were ascertained as insignificant (p > 0.05). CPRs were then calculated and compared to those derived from other studies. Ten of thirteen CPRs were significantly different from corresponding values derived from Caucasians. We conclude that tooth width ratios vary between different racial groups, and therefore that these should be calculated specifically for each patient racial group.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000200005OdontometryOrthodontics, CorrectiveDentition, Permanent |
| spellingShingle | Somchai Manopatanakul Narumon Watanawirun Comprehensive intermaxillary tooth width proportion of Bangkok residents Brazilian Oral Research Odontometry Orthodontics, Corrective Dentition, Permanent |
| title | Comprehensive intermaxillary tooth width proportion of Bangkok residents |
| title_full | Comprehensive intermaxillary tooth width proportion of Bangkok residents |
| title_fullStr | Comprehensive intermaxillary tooth width proportion of Bangkok residents |
| title_full_unstemmed | Comprehensive intermaxillary tooth width proportion of Bangkok residents |
| title_short | Comprehensive intermaxillary tooth width proportion of Bangkok residents |
| title_sort | comprehensive intermaxillary tooth width proportion of bangkok residents |
| topic | Odontometry Orthodontics, Corrective Dentition, Permanent |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000200005 |
| work_keys_str_mv | AT somchaimanopatanakul comprehensiveintermaxillarytoothwidthproportionofbangkokresidents AT narumonwatanawirun comprehensiveintermaxillarytoothwidthproportionofbangkokresidents |