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<h1 id="firstHeading" class="firstHeading mw-first-heading">
<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Universal Numbering System</span></span>
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</style><div role="note" class="hatnote navigation-not-searchable">This article is about the dental notation system. For the metal alloy numbering system, see <a href="Unified_numbering_system" title="Unified numbering system">Unified numbering system</a>.</div>

<p>The <b>Universal Numbering System</b>, sometimes called the "American System", is a <a href="Dental_notation" title="Dental notation">dental notation</a> system commonly used in the United States.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p><p>Most of the rest of the world uses the <a href="FDI_World_Dental_Federation_notation" title="FDI World Dental Federation notation">FDI World Dental Federation notation</a>, accepted as an international standard by the <a href="International_Standards_Organization" class="mw-redirect" title="International Standards Organization">International Standards Organization</a> as ISO 3950.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> However, dentists in the United Kingdom commonly still use the older <a href="Palmer_notation" title="Palmer notation">Palmer notation</a> despite the difficulty in representing its graphical components in computerized (non-handwritten) records.
</p>
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<div class="mw-heading mw-heading2"><h2 id="Left_and_right">Left and right</h2></div>
<p>Dental charts are normally arranged from the viewpoint of a <a href="Dentist" title="Dentist">dental practitioner</a> facing a patient. The patient's right side appears on the left side of the chart, and the patient's left side appears on the right side of the chart.
</p><p>The labels "right" and "left" on the charts in this article correspond to the patient's right and left, respectively.
</p>
<div class="mw-heading mw-heading2"><h2 id="Universal_numbering_system">Universal numbering system</h2></div>
<p>Although it is named the "universal numbering system", it is also called the "American system" as it is only used in the United States.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The uppercase letters <i>A</i> through <i>T</i> are used for primary teeth and the numbers 1 - 32 are used for permanent teeth. The tooth designated "1" is the maxillary right third molar ("<a href="Wisdom_tooth" title="Wisdom tooth">wisdom tooth</a>") and the count continues along the upper teeth to the left side. Then the count begins at the mandibular left third molar, designated number 17, and continues along the bottom teeth to the right side. Each tooth has a unique <b>number</b> or <b>letter</b>, allowing for easier use on keyboards.
</p>
<table class="wikitable">
<caption>Universal numbering system table
</caption>
<tbody><tr>
<th colspan="16" align="center">Permanent dentition
</th></tr>
<tr>
<th colspan="8" align="center">upper right</th>
<th colspan="8" align="center">upper left
</th></tr>
<tr>
<td><a href="Maxillary_third_molar" class="mw-redirect" title="Maxillary third molar">1</a></td>
<td><a href="Maxillary_second_molar" title="Maxillary second molar">2</a></td>
<td><a href="Maxillary_first_molar" title="Maxillary first molar">3</a></td>
<td><a href="Maxillary_second_premolar" title="Maxillary second premolar">4</a></td>
<td><a href="Maxillary_first_premolar" title="Maxillary first premolar">5</a></td>
<td><a href="Maxillary_canine" title="Maxillary canine">6</a></td>
<td><a href="Maxillary_lateral_incisor" title="Maxillary lateral incisor">7</a></td>
<td><a href="Maxillary_central_incisor" title="Maxillary central incisor">8</a></td>
<td><a href="Maxillary_central_incisor" title="Maxillary central incisor">9</a></td>
<td><a href="Maxillary_lateral_incisor" title="Maxillary lateral incisor">10</a></td>
<td><a href="Maxillary_canine" title="Maxillary canine">11</a></td>
<td><a href="Maxillary_first_premolar" title="Maxillary first premolar">12</a></td>
<td><a href="Maxillary_second_premolar" title="Maxillary second premolar">13</a></td>
<td><a href="Maxillary_first_molar" title="Maxillary first molar">14</a></td>
<td><a href="Maxillary_second_molar" title="Maxillary second molar">15</a></td>
<td><a href="Maxillary_third_molar" class="mw-redirect" title="Maxillary third molar">16</a>
</td></tr>
<tr>
<td><a href="Mandibular_third_molar" class="mw-redirect" title="Mandibular third molar">32</a></td>
<td><a href="Mandibular_second_molar" title="Mandibular second molar">31</a></td>
<td><a href="Mandibular_first_molar" title="Mandibular first molar">30</a></td>
<td><a href="Mandibular_second_premolar" title="Mandibular second premolar">29</a></td>
<td><a href="Mandibular_first_premolar" title="Mandibular first premolar">28</a></td>
<td><a href="Mandibular_canine" title="Mandibular canine">27</a></td>
<td><a href="Mandibular_lateral_incisor" title="Mandibular lateral incisor">26</a></td>
<td><a href="Mandibular_central_incisor" title="Mandibular central incisor">25</a></td>
<td><a href="Mandibular_central_incisor" title="Mandibular central incisor">24</a></td>
<td><a href="Mandibular_lateral_incisor" title="Mandibular lateral incisor">23</a></td>
<td><a href="Mandibular_canine" title="Mandibular canine">22</a></td>
<td><a href="Mandibular_first_premolar" title="Mandibular first premolar">21</a></td>
<td><a href="Mandibular_second_premolar" title="Mandibular second premolar">20</a></td>
<td><a href="Mandibular_first_molar" title="Mandibular first molar">19</a></td>
<td><a href="Mandibular_second_molar" title="Mandibular second molar">18</a></td>
<td><a href="Mandibular_third_molar" class="mw-redirect" title="Mandibular third molar">17</a>
</td></tr>
<tr>
<th colspan="8" align="center">lower right</th>
<th colspan="8" align="center">lower left
</th></tr>
<tr>
<td colspan="16" align="center">
</td></tr>
<tr>
<th colspan="16" align="center">Primary dentition
</th></tr>
<tr>
<th colspan="8" align="center">upper right</th>
<th colspan="8" align="center">upper left
</th></tr>
<tr>
<td></td>
<td></td>
<td></td>
<td>A</td>
<td>B</td>
<td>C</td>
<td>D</td>
<td>E</td>
<td>F</td>
<td>G</td>
<td>H</td>
<td>I</td>
<td>J</td>
<td></td>
<td></td>
<td>
</td></tr>
<tr>
<td></td>
<td></td>
<td></td>
<td>T</td>
<td>S</td>
<td>R</td>
<td>Q</td>
<td>P</td>
<td>O</td>
<td>N</td>
<td>M</td>
<td>L</td>
<td>K</td>
<td></td>
<td></td>
<td>
</td></tr>
<tr>
<th colspan="8" align="center">lower right</th>
<th colspan="8" align="center">lower left
</th></tr>
<tr>
<td colspan="16" align="center">
</td></tr>
<tr>
<th colspan="16" align="center">Alternate system for primary dentition
</th></tr>
<tr>
<th colspan="8" align="center">upper right</th>
<th colspan="8" align="center">upper left
</th></tr>
<tr>
<td></td>
<td></td>
<td></td>
<td>1d</td>
<td>2d</td>
<td>3d</td>
<td>4d</td>
<td>5d</td>
<td>6d</td>
<td>7d</td>
<td>8d</td>
<td>9d</td>
<td>10d</td>
<td></td>
<td></td>
<td>
</td></tr>
<tr>
<td></td>
<td></td>
<td></td>
<td>20d</td>
<td>19d</td>
<td>18d</td>
<td>17d</td>
<td>16d</td>
<td>15d</td>
<td>14d</td>
<td>13d</td>
<td>12d</td>
<td>11d</td>
<td></td>
<td></td>
<td>
</td></tr>
<tr>
<th colspan="8" align="center">lower right</th>
<th colspan="8" align="center">lower left
</th></tr></tbody></table>
<div class="mw-heading mw-heading2"><h2 id="Tooth_numbering">Tooth numbering</h2></div>

<p>Permanent teeth and their assigned numbers (Universal Tooth Numbering System)
</p><p>Upper right
</p>
<div><ol><li>3rd molar (wisdom tooth)</li><li>2nd molar (12-yr molar)</li><li>1st molar (6-yr molar)</li><li>2nd bicuspid (2nd premolar)</li><li>1st bicuspid (1st premolar)</li><li>Cuspid (canine/eye tooth)</li><li>Lateral incisor</li><li>Central incisor</li></ol></div>
<p>Upper left
</p>
<div><ol start="9"><li>Central incisor</li><li>Lateral incisor</li><li>Cuspid (canine/eye tooth)</li><li>1st bicuspid (1st premolar)</li><li>2nd bicuspid (2nd premolar)</li><li>1st molar (6-yr molar)</li><li>2nd molar (12-yr molar)</li><li>3rd molar (wisdom tooth)</li></ol></div>
<p>Lower left
</p>
<div><ol start="17"><li>3rd molar (wisdom tooth)</li><li>2nd molar (12-yr molar)</li><li>1st molar (6-yr molar)</li><li>2nd bicuspid (2nd premolar)</li><li>1st bicuspid (1st premolar)</li><li>Cuspid (canine/eye tooth)</li><li>Lateral incisor</li><li>Central incisor</li></ol></div>
<p>Lower right
</p>
<div><ol start="25"><li>Central incisor</li><li>Lateral incisor</li><li>Cuspid (canine/eye tooth)</li><li>1st bicuspid (1st premolar)</li><li>2nd bicuspid (2nd premolar)</li><li>1st molar (6-yr molar)</li><li>2nd molar (12-yr molar)</li><li>3rd molar (wisdom tooth)</li></ol></div>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Dental_notation" title="Dental notation">Dental notation</a></li>
<li><a href="FDI_World_Dental_Federation_notation" title="FDI World Dental Federation notation">FDI World Dental Federation notation</a></li>
<li><a href="Palmer_Notation_Method" class="mw-redirect" title="Palmer Notation Method">Palmer Notation Method</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20061102074427/http://www.ada.org/public/topics/tooth_number.asp">"Tooth Numbering Systems"</a>. <i>Oral Health Topics A–Z</i>. American Dental Association. Archived from <a rel="nofollow" class="external text" href="http://www.ada.org/public/topics/tooth_number.asp">the original</a> on November 2, 2006<span class="reference-accessdate">. Retrieved <span class="nowrap">2014-05-26</span></span>.</cite> (www.archive.org link)</span>
</li>
<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite id="CITEREFAmerican_Dental_Association2022" class="citation web cs1">American Dental Association (August 2022). <a rel="nofollow" class="external text" href="https://www.ada.org/-/media/project/ada-organization/ada/ada-org/files/publications/cdt/ada_utds_value_set_v1_2022_aug.pdf">"Universal Tooth Designation System"</a> <span class="cs1-format">(PDF)</span>. <i>ValueSet - Universal Tooth Designation System ada.org</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230306005239/https://www.ada.org/-/media/project/ada-organization/ada/ada-org/files/publications/cdt/ada_utds_value_set_v1_2022_aug.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2023-03-06<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-03-10</span></span>.</cite></span>
</li>
<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://standardsforum.com/iso-3950/">ISO 3950 Updated – Dentistry Designation System</a></span>
</li>
<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.inkling.com/read/histology-michael-ross-and-wojciech-pawlina-6th/chapter-16/folder-16-2">"Histology: A Text and Atlas by Michael H. Ross • Wojciech Pawlina"</a>.</cite></span>
</li>
</ol></div></div>
<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
<ul><li><a rel="nofollow" class="external text" href="http://www.drbunn.com/faq/tooth-numbering">Dr. Bunn page on dental notations</a>.</li>
<li><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=i5Ihx2aV7VA&amp;t=51s">Video regarding the Universal Numbering System</a></li></ul>
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</style><div id="Dental_anatomy122" style="font-size:114%;margin:0 4em"><a href="Dental_anatomy" title="Dental anatomy">Dental anatomy</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Nomenclature</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Glossary_of_dentistry" title="Glossary of dentistry">Glossary of dentistry</a></li>
</ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Human_tooth" title="Human tooth">Teeth</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Permanent_teeth" title="Permanent teeth">Permanent</a>
<ul><li><a href="Incisor" title="Incisor">incisor</a></li>
<li><a href="Canine_tooth" title="Canine tooth">canine</a></li>
<li><a href="Premolar" title="Premolar">premolar</a></li>
<li><a href="Molar_(tooth)" title="Molar (tooth)">molar</a></li></ul></li>
<li><a href="Deciduous_teeth" title="Deciduous teeth">Deciduous</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Maxilla" title="Maxilla">Maxillary</a> teeth</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Incisor</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Maxillary_central_incisor" title="Maxillary central incisor">Central incisor</a></li>
<li><a href="Maxillary_lateral_incisor" title="Maxillary lateral incisor">Lateral incisor</a></li>
<li><a href="Maxillary_canine" title="Maxillary canine">Canine</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Premolar</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Maxillary_first_premolar" title="Maxillary first premolar">First premolar</a></li>
<li><a href="Maxillary_second_premolar" title="Maxillary second premolar">Second premolar</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Molar</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Maxillary_first_molar" title="Maxillary first molar">First molar</a></li>
<li><a href="Maxillary_second_molar" title="Maxillary second molar">Second molar</a></li>
<li><a href="Wisdom_tooth" title="Wisdom tooth">Third molar</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Mandible" title="Mandible">Mandibular</a> teeth</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Incisor</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Mandibular_central_incisor" title="Mandibular central incisor">Central incisor</a></li>
<li><a href="Mandibular_lateral_incisor" title="Mandibular lateral incisor">Lateral incisor</a></li>
<li><a href="Mandibular_canine" title="Mandibular canine">Canine</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Premolar</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Mandibular_first_premolar" title="Mandibular first premolar">First premolar</a></li>
<li><a href="Mandibular_second_premolar" title="Mandibular second premolar">Second premolar</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Molar</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Mandibular_first_molar" title="Mandibular first molar">First molar</a></li>
<li><a href="Mandibular_second_molar" title="Mandibular second molar">Second molar</a></li>
<li><a href="Wisdom_tooth" title="Wisdom tooth">Third molar</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Human_tooth#Parts" title="Human tooth">Parts</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Crown23" scope="row" class="navbox-group" style="width:1%"><a href="Crown_(tooth)" title="Crown (tooth)">Crown</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Cusp_(anatomy)" title="Cusp (anatomy)">Cusp</a>
<ul><li><a href="Cusp_of_Carabelli" title="Cusp of Carabelli">Cusp of Carabelli</a></li></ul></li>
<li><a href="Zuckerkandl's_tubercle_(teeth)" title="Zuckerkandl's tubercle (teeth)">Zuckerkandl's tubercle</a></li></ul>
</div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Pulp_(tooth)" title="Pulp (tooth)">Pulp</a></li>
<li><a href="Root_canal" title="Root canal">Root canal</a>
<ul><li><a href="Apical_foramen" title="Apical foramen">Apical foramen</a></li></ul></li></ul>
</div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Cementoenamel_junction" title="Cementoenamel junction">Cementoenamel junction</a></li>
<li><a href="Tooth_enamel" title="Tooth enamel">Enamel</a></li>
<li><a href="Dental-enamel_junction" class="mw-redirect" title="Dental-enamel junction">Dental-enamel junction</a></li>
<li><a href="Dentin" title="Dentin">Dentin</a></li>
<li><a href="Dental_papilla" title="Dental papilla">Dental papilla</a></li></ul>
</div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Mamelon_(dentistry)" title="Mamelon (dentistry)">Mamelon</a></li></ul>
</div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Dental_alveolus" title="Dental alveolus">Dental alveolus</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr></tbody></table></div></div><!--htdig_noindex--><div><div class="zim-footer">
This article is issued from <a class="external text" title="Last edited on 2023-11-28" href="https://en.wikipedia.org/wiki/?title=Universal_Numbering_System&amp;oldid=1187383001">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
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