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- Publisher Website: 10.1093/ejo/cjx022
- Scopus: eid_2-s2.0-85040059122
- PMID: 28379399
- WOS: WOS:000417339800010
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Article: The nasopalatine canal, a limiting factor for temporary anchorage devices: a cone beam computed tomography data study
Title | The nasopalatine canal, a limiting factor for temporary anchorage devices: a cone beam computed tomography data study |
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Authors | |
Issue Date | 2017 |
Publisher | Oxford University Press. The Journal's web site is located at http://ejo.oxfordjournals.org/ |
Citation | European Journal of Orthodontics, 2017, v. 39 n. 6, p. 646-653 How to Cite? |
Abstract | Summary Objectives There is only little knowledge on topographical predispositions of the nasopalatine canal as a limiting factor for insertion of mid-palatal temporary anchorage devices (TAD). The purpose of the study was to assess the course of the nasopalatine canal, the adjacent vertical bone quantity, and whether it might differ among vertical facial types, using pre-existing cone beam computed tomography (CBCT) scans. Material and Methods Out of a consecutive sample collected from April 2008 to August 2012, only patient data depicting both upper and lower jaw completely were evaluated retrospectively. The linear measurements were taken on the respective midsagittal view perpendicular to the palate at the level of 1st molar/2nd premolar (5/6), 2nd premolar/1st premolar (4/5), and 1st premolar/canine (3/4). Screen-prints were used to measure the inclination of the nasopalatine canal in relation to the maxillary jaw base. Maxillary and mandibular divergence was assessed on rendered lateral cephalograms. Results Out of 3869 pre-existing consecutive CBCT scans, data from 398 patients met the inclusion criteria and could be extracted. The mean vertical bone was 4.09 mm at the 5/6 level, 5.22 mm at the 4/5 level, and 3.14 mm at the 3/4 level, respectively. A statistically significant negative correlation exists between jaw divergence and the canal angulation with regard to the maxillary base. A statistically significant negative correlation exists between the canal angulation and vertical bone measurements at the 4/5 and 3/4 levels. Conclusions Vertical bone volume is sufficient at 4/5 level for TAD placement, and bares only a small risk for neuro-sensory impairment. Therefore, only in rare cases a CBCT is justified for palatal implant placement. The course of the nasopalatine canal is negatively correlated with the vertical skeletal facial pattern pointing to the fact that in hypodivergent patients a TAD might be placed in a more distal or paramedian region. © The Author 2017. |
Persistent Identifier | http://hdl.handle.net/10722/246963 |
ISSN | 2023 Impact Factor: 2.8 2023 SCImago Journal Rankings: 0.940 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Tilen, R | - |
dc.contributor.author | Patcas, R | - |
dc.contributor.author | Bornstein, MM | - |
dc.contributor.author | Ludwig, BJÖRN | - |
dc.contributor.author | Schätzle, MARC | - |
dc.date.accessioned | 2017-10-18T08:20:04Z | - |
dc.date.available | 2017-10-18T08:20:04Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | European Journal of Orthodontics, 2017, v. 39 n. 6, p. 646-653 | - |
dc.identifier.issn | 0141-5387 | - |
dc.identifier.uri | http://hdl.handle.net/10722/246963 | - |
dc.description.abstract | Summary Objectives There is only little knowledge on topographical predispositions of the nasopalatine canal as a limiting factor for insertion of mid-palatal temporary anchorage devices (TAD). The purpose of the study was to assess the course of the nasopalatine canal, the adjacent vertical bone quantity, and whether it might differ among vertical facial types, using pre-existing cone beam computed tomography (CBCT) scans. Material and Methods Out of a consecutive sample collected from April 2008 to August 2012, only patient data depicting both upper and lower jaw completely were evaluated retrospectively. The linear measurements were taken on the respective midsagittal view perpendicular to the palate at the level of 1st molar/2nd premolar (5/6), 2nd premolar/1st premolar (4/5), and 1st premolar/canine (3/4). Screen-prints were used to measure the inclination of the nasopalatine canal in relation to the maxillary jaw base. Maxillary and mandibular divergence was assessed on rendered lateral cephalograms. Results Out of 3869 pre-existing consecutive CBCT scans, data from 398 patients met the inclusion criteria and could be extracted. The mean vertical bone was 4.09 mm at the 5/6 level, 5.22 mm at the 4/5 level, and 3.14 mm at the 3/4 level, respectively. A statistically significant negative correlation exists between jaw divergence and the canal angulation with regard to the maxillary base. A statistically significant negative correlation exists between the canal angulation and vertical bone measurements at the 4/5 and 3/4 levels. Conclusions Vertical bone volume is sufficient at 4/5 level for TAD placement, and bares only a small risk for neuro-sensory impairment. Therefore, only in rare cases a CBCT is justified for palatal implant placement. The course of the nasopalatine canal is negatively correlated with the vertical skeletal facial pattern pointing to the fact that in hypodivergent patients a TAD might be placed in a more distal or paramedian region. © The Author 2017. | - |
dc.language | eng | - |
dc.publisher | Oxford University Press. The Journal's web site is located at http://ejo.oxfordjournals.org/ | - |
dc.relation.ispartof | European Journal of Orthodontics | - |
dc.rights | Pre-print: Journal Title] ©: [year] [owner as specified on the article] Published by Oxford University Press [on behalf of xxxxxx]. All rights reserved. Pre-print (Once an article is published, preprint notice should be amended to): This is an electronic version of an article published in [include the complete citation information for the final version of the Article as published in the print edition of the Journal.] Post-print: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in [insert journal title] following peer review. The definitive publisher-authenticated version [insert complete citation information here] is available online at: xxxxxxx [insert URL that the author will receive upon publication here]. | - |
dc.title | The nasopalatine canal, a limiting factor for temporary anchorage devices: a cone beam computed tomography data study | - |
dc.type | Article | - |
dc.identifier.email | Bornstein, MM: bornst@hku.hk | - |
dc.identifier.authority | Bornstein, MM=rp02217 | - |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.doi | 10.1093/ejo/cjx022 | - |
dc.identifier.pmid | 28379399 | - |
dc.identifier.scopus | eid_2-s2.0-85040059122 | - |
dc.identifier.hkuros | 281696 | - |
dc.identifier.volume | 39 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 646 | - |
dc.identifier.epage | 653 | - |
dc.identifier.isi | WOS:000417339800010 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0141-5387 | - |