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The Measurement of Vertical Length from the Root Tip of Maxillary Anterior Teeth to Nasal Floor, When Maxillary Anterior Implants Placed  

Jang, Hae-Man (Department of Dentistry, Graduate School, Kyungpook National University)
Kim, Jin-Wook (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyunpook National University)
Kwon, Tae-Geon (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyunpook National University)
Jang, Hyun-Joong (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyunpook National University)
Kim, Chin-Soo (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyunpook National University)
Lee, Sang-Han (Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyunpook National University)
Publication Information
Maxillofacial Plastic and Reconstructive Surgery / v.34, no.5, 2012 , pp. 326-331 More about this Journal
Abstract
Purpose: Length measurement from maxillary anterior teeth root tip to nasal floor is incorrect in panoramic radiography. Comparison of cone beam computed tomography (CBCT) and panoramic radiography should be helpful in determining the vertical length. Methods: Sixty nine patients were taken CBCT and panoramic radiography of the maxillary anterior. First measurement is length of parallel lines from the central incisor and lateral incisor root tip to nasal floor on CBCT. Second measurement is length of perpendicular lines from the central incisor and lateral incisor root tip to nasal floor on CBCT. Third measurement is length from the central incisor and lateral incisor root tip to nasal floor on panoramic radiographys. Results: In the first measurement of the maxillary central incisors, an average of $11.36{\pm}2.49$ mm in males and $10.49{\pm}2.17$ mm in females. In the second measurement of the maxillary central incisors, $10.41{\pm}2.42$ mm in males and $9.18{\pm}2.08$ mm in females. In the third measurement of the maxillary central incisors, $10.71{\pm}2.20$ mm in males and $9.27{\pm}2.10$ mm in females. In the first measurement of the maxillary lateral incisors, an average of $13.40{\pm}2.04$ mm in males and $11.96{\pm}2.20$ mm in females. In the second measurement of the maxillary lateral incisors, $11.25{\pm}1.82$ mm in males and $10.06{\pm}1.68$ mm in females. In the third measurement of the maxillary lateral incisors, $11.47{\pm}2.01$ mm in males and $10.13{\pm}1.70$ mm in females. Conclusion: The vertical length from root tip to nasal floor was longer in male than female (P>0.05). First measurement was longer than third measurement (P<0.05). This is the actual placement of the implant site measured on the vertical length than the length of the panorama means that there are a few more free. The first measurement was longer than 114% over the third measurement.
Keywords
Panoramic radiography; Cone-beam computed tomography; Nasal floor; Dental implants;
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