Radiologic measurements of the mandible: a comparison between CT-reformatted and conventional tomographic images.
Identifieur interne : 007705 ( Main/Exploration ); précédent : 007704; suivant : 007706Radiologic measurements of the mandible: a comparison between CT-reformatted and conventional tomographic images.
Auteurs : Tomomi Hanazawa [Japon] ; Tsukasa Sano ; Kenji Seki ; Tomohiro OkanoSource :
- Clinical oral implants research [ 0905-7161 ] ; 2004.
Descripteurs français
- KwdFr :
- Analyse de variance, Cadavre, Erreurs de diagnostic, Femelle, Grossissement radiographique, Humains, Mandibule (imagerie diagnostique), Mâchoire édentée (imagerie diagnostique), Mâle, Nerf mandibulaire (imagerie diagnostique), Planification des soins du patient, Pose d'implant dentaire endo-osseux, Processus alvéolaire (imagerie diagnostique), Radiographie dentaire (), Radiographie numérisée dentaire (instrumentation), Reproductibilité des résultats, Sujet âgé, Sujet âgé de 80 ans ou plus, Tomodensitomètre, Tomodensitométrie ().
- MESH :
- imagerie diagnostique : Mandibule, Mâchoire édentée, Nerf mandibulaire, Processus alvéolaire.
- instrumentation : Analyse de variance, Cadavre, Erreurs de diagnostic, Femelle, Grossissement radiographique, Humains, Mâle, Planification des soins du patient, Pose d'implant dentaire endo-osseux, Radiographie dentaire, Radiographie numérisée dentaire, Reproductibilité des résultats, Sujet âgé, Sujet âgé de 80 ans ou plus, Tomodensitomètre, Tomodensitométrie.
English descriptors
- KwdEn :
- Aged, Aged, 80 and over, Alveolar Process (diagnostic imaging), Analysis of Variance, Cadaver, Dental Implantation, Endosseous, Diagnostic Errors, Female, Humans, Jaw, Edentulous (diagnostic imaging), Male, Mandible (diagnostic imaging), Mandibular Nerve (diagnostic imaging), Patient Care Planning, Radiographic Magnification, Radiography, Dental (methods), Radiography, Dental, Digital (instrumentation), Reproducibility of Results, Tomography Scanners, X-Ray Computed, Tomography, X-Ray Computed (methods).
- MESH :
- diagnostic imaging : Alveolar Process, Jaw, Edentulous, Mandible, Mandibular Nerve.
- instrumentation : Radiography, Dental, Digital.
- methods : Radiography, Dental, Tomography, X-Ray Computed.
- Aged, Aged, 80 and over, Analysis of Variance, Cadaver, Dental Implantation, Endosseous, Diagnostic Errors, Female, Humans, Male, Patient Care Planning, Radiographic Magnification, Reproducibility of Results, Tomography Scanners, X-Ray Computed.
Abstract
This study was carried out to compare the accuracy of determination of the mandibular contour and the position of the mandibular canal in cadaver mandibles by the multiplanar reconstruction method (MPR-CT), which has recently come to be used widely for preoperative examinations, with those by tomographic techniques and to evaluate the usefulness of MPR-CT. Using three imaging systems, i.e. Quantum CT scanner, Scanora, and OP-100, a total of 6 sites were scanned in the molar regions of 3 cadaver mandibles. The images obtained were measured twice each by 4 radiologists. The anatomic structures measured were the height and thickness of the mandible, distance from the alveolar crest to the mandibular canal, and distance from the buccal cortical bone to the mandibular canal. After scanning, the scanned areas of the mandibles were sliced at a thickness of 2 mm, and soft X-ray images of these slices were obtained. The values of the above 4 anatomic structures obtained by measurements in the soft X-ray radiograms using digital-display calipers were regarded as true values. When compared with the true values, the errors in the distance from the alveolar crest to the mandibular canal were within 1 mm (+/- 1 mm) in 93.7% of the measurements by Direct-CT, 89.6% of the measurements by MPR-CT, 87.5% of the measurements by Scanora, and 47.9% of the measurements by OP-100, and the accuracy of the 4 methods ranked in the order of Direct-CT, MPR-CT, Scanora, and OP-100. A similar tendency was observed in the measurements of other anatomic structures, and statistically significant differences were observed among the methods. Thus, MPR-CT allows more accurate measurements than by the other 2 tomographic techniques,and to be useful as a preoperative examination for implant surgery.
PubMed: 15008935
Affiliations:
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Le document en format XML
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last="Seki">Kenji Seki</name></author><author><name sortKey="Okano, Tomohiro" sort="Okano, Tomohiro" uniqKey="Okano T" first="Tomohiro" last="Okano">Tomohiro Okano</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2004">2004</date><idno type="RBID">pubmed:15008935</idno><idno type="pmid">15008935</idno><idno type="wicri:Area/PubMed/Corpus">002C63</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">002C63</idno><idno type="wicri:Area/PubMed/Curation">002C63</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">002C63</idno><idno type="wicri:Area/PubMed/Checkpoint">002C63</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">002C63</idno><idno type="wicri:Area/Ncbi/Merge">001270</idno><idno type="wicri:Area/Ncbi/Curation">001270</idno><idno type="wicri:Area/Ncbi/Checkpoint">001270</idno><idno type="wicri:doubleKey">0905-7161:2004:Hanazawa 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Tsukasa" sort="Sano, Tsukasa" uniqKey="Sano T" first="Tsukasa" last="Sano">Tsukasa Sano</name></author><author><name sortKey="Seki, Kenji" sort="Seki, Kenji" uniqKey="Seki K" first="Kenji" last="Seki">Kenji Seki</name></author><author><name sortKey="Okano, Tomohiro" sort="Okano, Tomohiro" uniqKey="Okano T" first="Tomohiro" last="Okano">Tomohiro Okano</name></author></analytic><series><title level="j">Clinical oral implants research</title><idno type="ISSN">0905-7161</idno><imprint><date when="2004" type="published">2004</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aged</term><term>Aged, 80 and over</term><term>Alveolar Process (diagnostic imaging)</term><term>Analysis of Variance</term><term>Cadaver</term><term>Dental Implantation, Endosseous</term><term>Diagnostic Errors</term><term>Female</term><term>Humans</term><term>Jaw, Edentulous (diagnostic imaging)</term><term>Male</term><term>Mandible (diagnostic imaging)</term><term>Mandibular Nerve (diagnostic imaging)</term><term>Patient Care Planning</term><term>Radiographic Magnification</term><term>Radiography, Dental (methods)</term><term>Radiography, Dental, Digital (instrumentation)</term><term>Reproducibility of Results</term><term>Tomography Scanners, X-Ray Computed</term><term>Tomography, X-Ray Computed (methods)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Analyse de variance</term><term>Cadavre</term><term>Erreurs de diagnostic</term><term>Femelle</term><term>Grossissement radiographique</term><term>Humains</term><term>Mandibule (imagerie diagnostique)</term><term>Mâchoire édentée (imagerie diagnostique)</term><term>Mâle</term><term>Nerf mandibulaire (imagerie diagnostique)</term><term>Planification des soins du patient</term><term>Pose d'implant dentaire endo-osseux</term><term>Processus alvéolaire (imagerie diagnostique)</term><term>Radiographie dentaire ()</term><term>Radiographie numérisée dentaire (instrumentation)</term><term>Reproductibilité des résultats</term><term>Sujet âgé</term><term>Sujet âgé de 80 ans ou plus</term><term>Tomodensitomètre</term><term>Tomodensitométrie ()</term></keywords><keywords scheme="MESH" qualifier="diagnostic imaging" xml:lang="en"><term>Alveolar Process</term><term>Jaw, Edentulous</term><term>Mandible</term><term>Mandibular Nerve</term></keywords><keywords scheme="MESH" qualifier="imagerie diagnostique" xml:lang="fr"><term>Mandibule</term><term>Mâchoire édentée</term><term>Nerf mandibulaire</term><term>Processus alvéolaire</term></keywords><keywords scheme="MESH" qualifier="instrumentation" xml:lang="en"><term>Radiography, Dental, Digital</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Radiography, Dental</term><term>Tomography, X-Ray Computed</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Aged, 80 and over</term><term>Analysis of Variance</term><term>Cadaver</term><term>Dental Implantation, Endosseous</term><term>Diagnostic Errors</term><term>Female</term><term>Humans</term><term>Male</term><term>Patient Care Planning</term><term>Radiographic Magnification</term><term>Reproducibility of Results</term><term>Tomography Scanners, X-Ray Computed</term></keywords><keywords scheme="MESH" qualifier="instrumentation" xml:lang="fr"><term>Analyse de variance</term><term>Cadavre</term><term>Erreurs de diagnostic</term><term>Femelle</term><term>Grossissement radiographique</term><term>Humains</term><term>Mâle</term><term>Planification des soins du patient</term><term>Pose d'implant dentaire endo-osseux</term><term>Radiographie dentaire</term><term>Radiographie numérisée dentaire</term><term>Reproductibilité des résultats</term><term>Sujet âgé</term><term>Sujet âgé de 80 ans ou plus</term><term>Tomodensitomètre</term><term>Tomodensitométrie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study was carried out to compare the accuracy of determination of the mandibular contour and the position of the mandibular canal in cadaver mandibles by the multiplanar reconstruction method (MPR-CT), which has recently come to be used widely for preoperative examinations, with those by tomographic techniques and to evaluate the usefulness of MPR-CT. Using three imaging systems, i.e. Quantum CT scanner, Scanora, and OP-100, a total of 6 sites were scanned in the molar regions of 3 cadaver mandibles. The images obtained were measured twice each by 4 radiologists. The anatomic structures measured were the height and thickness of the mandible, distance from the alveolar crest to the mandibular canal, and distance from the buccal cortical bone to the mandibular canal. After scanning, the scanned areas of the mandibles were sliced at a thickness of 2 mm, and soft X-ray images of these slices were obtained. The values of the above 4 anatomic structures obtained by measurements in the soft X-ray radiograms using digital-display calipers were regarded as true values. When compared with the true values, the errors in the distance from the alveolar crest to the mandibular canal were within 1 mm (+/- 1 mm) in 93.7% of the measurements by Direct-CT, 89.6% of the measurements by MPR-CT, 87.5% of the measurements by Scanora, and 47.9% of the measurements by OP-100, and the accuracy of the 4 methods ranked in the order of Direct-CT, MPR-CT, Scanora, and OP-100. A similar tendency was observed in the measurements of other anatomic structures, and statistically significant differences were observed among the methods. Thus, MPR-CT allows more accurate measurements than by the other 2 tomographic techniques,and to be useful as a preoperative examination for implant surgery.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région de Kantō</li></region><settlement><li>Tokyo</li></settlement></list><tree><noCountry><name sortKey="Okano, Tomohiro" sort="Okano, Tomohiro" uniqKey="Okano T" first="Tomohiro" last="Okano">Tomohiro Okano</name><name sortKey="Sano, Tsukasa" sort="Sano, Tsukasa" uniqKey="Sano T" first="Tsukasa" last="Sano">Tsukasa Sano</name><name sortKey="Seki, Kenji" sort="Seki, Kenji" uniqKey="Seki K" first="Kenji" last="Seki">Kenji Seki</name></noCountry><country name="Japon"><region name="Région de Kantō"><name sortKey="Hanazawa, Tomomi" sort="Hanazawa, Tomomi" uniqKey="Hanazawa T" first="Tomomi" last="Hanazawa">Tomomi Hanazawa</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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