Safe zone for bone harvesting from the interforaminal region of the mandible
Aims The mandibular incisive nerve can be subjected to iatrogenic injury during bone graft harvesting. Using cone beam computed tomography (CBCT), this study aims to determine a safe zone for bone graft harvesting that avoids injuring this nerve. Methods Sixty CBCT examinations of patients were incl...
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Published in | Clinical oral implants research Vol. 24; no. sA100; pp. 115 - 121 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Denmark
Blackwell Publishing Ltd
01.08.2013
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Subjects | |
Online Access | Get full text |
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Summary: | Aims
The mandibular incisive nerve can be subjected to iatrogenic injury during bone graft harvesting. Using cone beam computed tomography (CBCT), this study aims to determine a safe zone for bone graft harvesting that avoids injuring this nerve.
Methods
Sixty CBCT examinations of patients were included in this study. The examinations were taken using the i‐CAT CBCT imaging system, applying a standardized exposure protocol. Image reconstruction from the raw data was performed using the SimPlant dental implant software. The distances of mandibular incisive canal (MIC) to the inferior border and the labial and lingual cortices of the mandible were measured at 3, 5, 7 and 9 mm mesial to the mental foramen.
Results
The MIC was visible in all (100%) CBCT images. The median distance and interquartile range from the lower border of the mandible was 9.86 (2.51) mm, curving downwards toward the inferior mandibular border at the symphysis menti. It was located closer to the buccal border of the mandible (3.15 [1.28] mm) than lingual cortex (4.78 [2.0] mm). The MIC curves toward the lingual side at the symphysis menti. There was gender difference in a number of these measurements. Current recommendation for chin bone graft harvesting can be applied to Asian subjects.
Conclusions
While acknowledging that there is human variability, this study provides an accurate anatomic location of the MIC, which in turn helps to determine a safe zone for chin bone graft harvesting. This information can become a useful guide in centers where CBCT is not available. |
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Bibliography: | istex:D73C409B3B3F442F5D79A1CB506C8C66785E7241 ark:/67375/WNG-LC64FLJM-K ArticleID:CLR2393 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0905-7161 1600-0501 |
DOI: | 10.1111/j.1600-0501.2011.02393.x |