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Oblique lateral cephalometric radiographs of the mandible in implantology: usefulness and accuracy of the technique in height measurements of mandibular bone in vivo

Identifieur interne : 008E55 ( Main/Exploration ); précédent : 008E54; suivant : 008E56

Oblique lateral cephalometric radiographs of the mandible in implantology: usefulness and accuracy of the technique in height measurements of mandibular bone in vivo

Auteurs : Jan Willem Verhoeven [Pays-Bas] ; Marco Stephan Cune [Pays-Bas]

Source :

RBID : ISTEX:FE756772C7A979E77D3857A4EF910DF2B39AA6DC

Descripteurs français

English descriptors

Abstract

Various radiographic techniques are used for longitudinal studies of changes in the height of the mandible with implants. Advantages and disadvantages of panoramic radiographs, lateral cephalometric radiographs, periapical films and modern CT‐ and MRI‐techniques are briefly discussed. In this study, the usefulness of a conventional radiographic technique for measuring the height of the mandible, i.e. oblique lateral cephalometric radiography (OLCR) is evaluated in vivo. In 16 patients with permucosal implants in the anterior mandible OLCRs were repeated the same day. The mean total error for the radiographic procedure and analysis was 0.38 mm. The intra‐observer error for the determination of the mandibular height by means of the image analysis procedure was 0.16 mm (analysis error). In 12 other patients pairs of radiographs of the same area of the mandible were made using both a “standard” horizontal X‐ray beam direction and an individually determined “optimal” horizontal X‐ray beam direction; the maximum difference between these two angulations was plus or minus 7.5 degrees. The effect of this different angulation on the height measurements is comparable to the above‐mentioned total error of the measurement procedure (positioning error). An accurate positioning of the patient seems important for reliable measurements. The described radiographic (OLCR) and analysis (IBAS) technique can be used relatively simply for clinical studies. The described methods appear to be useful for measuring the mandibular height in longitudinal studies in patients with or without implants.

Url:
DOI: 10.1034/j.1600-0501.2000.011001039.x


Affiliations:


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<term>Algorithm</term>
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<term>Aluminium reference wedge</term>
<term>Aluminium transformation</term>
<term>Aluminium wedge</term>
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<term>Densitometric measurements</term>
<term>Densitometry (methods)</term>
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<term>Dentomaxillofacial radiology</term>
<term>Digital subtraction radiography</term>
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<term>Image analysis</term>
<term>Image processing</term>
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<term>Intraoral periapical</term>
<term>Jaw, Edentulous (diagnostic imaging)</term>
<term>Jeffcoat</term>
<term>Jeffcoat reddy</term>
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<term>Lateral cephalometric radiographs</term>
<term>Light source</term>
<term>Longitudinal Studies</term>
<term>Longitudinal studies</term>
<term>Longitudinal study</term>
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<term>Measurement errors</term>
<term>Measurement results</term>
<term>Measurement series</term>
<term>Measurements series</term>
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<term>Oblique</term>
<term>Observer Variation</term>
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<term>Olcrs</term>
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<term>Periapical radiographs</term>
<term>Periodontal research</term>
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<term>Present study</term>
<term>Quantitative densitometric measurements</term>
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<term>Radiographic techniques</term>
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<term>Relative difference</term>
<term>Relative effect</term>
<term>Reliable measurements</term>
<term>Repositioning</term>
<term>Reproducibility of Results</term>
<term>Soft tissue correction</term>
<term>Soft tissue correction algorithm</term>
<term>Soft tissue projection</term>
<term>Soft tissues</term>
<term>Square measurement</term>
<term>Total error</term>
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<term>Biais de l'observateur</term>
<term>Céphalométrie ()</term>
<term>Densitométrie ()</term>
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<term>Reproductibilité des résultats</term>
<term>Résorption alvéolaire (imagerie diagnostique)</term>
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<term>Aluminium transformation</term>
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<term>Anterior region</term>
<term>Atrophic mandible</term>
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<term>Bone density</term>
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<term>Dentomaxillofacial radiology</term>
<term>Digital subtraction radiography</term>
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<term>Endosseous implants</term>
<term>Extraoral</term>
<term>Group patients</term>
<term>Hauteur mandibulaire</term>
<term>Height measurements</term>
<term>Horizontal angle</term>
<term>Horizontal beam direction</term>
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<term>Image acquisition</term>
<term>Image analysis</term>
<term>Image processing</term>
<term>Implant</term>
<term>Implant region</term>
<term>Implantology</term>
<term>Implants research</term>
<term>Intraoral</term>
<term>Intraoral periapical</term>
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<term>Measurement error</term>
<term>Measurement errors</term>
<term>Measurement results</term>
<term>Measurement series</term>
<term>Measurements series</term>
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<term>Oblique</term>
<term>Observer Variation</term>
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<term>Olcrs</term>
<term>Optimal projection</term>
<term>Oral maxillofacial surgery</term>
<term>Panoramic</term>
<term>Panoramic radiographs</term>
<term>Para</term>
<term>Periapical</term>
<term>Periapical radiographs</term>
<term>Periodontal research</term>
<term>Permucosal implants</term>
<term>Phantoms, Imaging</term>
<term>Posture</term>
<term>Present study</term>
<term>Quantitative densitometric measurements</term>
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<term>Radiographic Image Interpretation, Computer-Assisted</term>
<term>Radiographic technique</term>
<term>Radiographic techniques</term>
<term>Radiography</term>
<term>Reference Values</term>
<term>Relative difference</term>
<term>Relative effect</term>
<term>Reliable measurements</term>
<term>Repositioning</term>
<term>Reproducibility of Results</term>
<term>Soft tissue correction</term>
<term>Soft tissue correction algorithm</term>
<term>Soft tissue projection</term>
<term>Soft tissues</term>
<term>Square measurement</term>
<term>Total error</term>
<term>Utrecht</term>
<term>Utrecht university</term>
<term>Verhoeven</term>
<term>Verhoeven cune</term>
<term>Webber</term>
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<term>Amélioration d'image radiographique</term>
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<term>Céphalométrie</term>
<term>Densitométrie</term>
<term>Densité osseuse</term>
<term>Fantômes en imagerie</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Interprétation de radiographie assistée par ordinateur</term>
<term>Pose d'implant dentaire endo-osseux</term>
<term>Posture</term>
<term>Reproductibilité des résultats</term>
<term>Utrecht</term>
<term>Valeurs de référence</term>
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<div type="abstract" xml:lang="en">Various radiographic techniques are used for longitudinal studies of changes in the height of the mandible with implants. Advantages and disadvantages of panoramic radiographs, lateral cephalometric radiographs, periapical films and modern CT‐ and MRI‐techniques are briefly discussed. In this study, the usefulness of a conventional radiographic technique for measuring the height of the mandible, i.e. oblique lateral cephalometric radiography (OLCR) is evaluated in vivo. In 16 patients with permucosal implants in the anterior mandible OLCRs were repeated the same day. The mean total error for the radiographic procedure and analysis was 0.38 mm. The intra‐observer error for the determination of the mandibular height by means of the image analysis procedure was 0.16 mm (analysis error). In 12 other patients pairs of radiographs of the same area of the mandible were made using both a “standard” horizontal X‐ray beam direction and an individually determined “optimal” horizontal X‐ray beam direction; the maximum difference between these two angulations was plus or minus 7.5 degrees. The effect of this different angulation on the height measurements is comparable to the above‐mentioned total error of the measurement procedure (positioning error). An accurate positioning of the patient seems important for reliable measurements. The described radiographic (OLCR) and analysis (IBAS) technique can be used relatively simply for clinical studies. The described methods appear to be useful for measuring the mandibular height in longitudinal studies in patients with or without implants.</div>
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