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intrusion |
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intrusion [in·tro̅o̅′zhən] Etymology: L, intrudere, to push or force in an orthodontic technique of depressing a tooth back into the occlusal plane or attempting to prevent its eruption or elongation during correction of an excessive overbite. Compare extrusion (def. 3). intrusion, n a depression; an inward projection. intrusion an orthodontic procedure in which a tooth is made to move further into the alveolus. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| They have a good handle on the properties of the River Valley Intrusive's 12-km contact and now are working to expand away from the line into the intrusive rocks. This assemblage of the sedimentary, exhalative, and intrusive rock, is common with similar belts elsewhere in the Guiana Shield of Brazil, the Guainas, and Venezuela. The geological setting of the La Reforma Mine is complex and consists of Mesozoic age, carbonate rich, meta-sedimentary and meta-volcanic rocks which are intruded by several phases of intrusive rocks from Cretaceous to Miocene time. |
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