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Is micro‐computed tomography reliable to determine the microstructure of the maxillary alveolar bone?

Identifieur interne : 000418 ( Istex/Corpus ); précédent : 000417; suivant : 000419

Is micro‐computed tomography reliable to determine the microstructure of the maxillary alveolar bone?

Auteurs : Raúl González-García ; Florencio Monje

Source :

RBID : ISTEX:7142F354623B50630689404D2E7A8043A3E31986

English descriptors

Abstract

To analyze the reliability of micro‐computed tomography (micro‐CT) to assess bone density and the microstructure of the maxillary bones at the alveolar process in human clinics by direct comparison with conventional stereologic‐based histomorphometry.

Url:
DOI: 10.1111/j.1600-0501.2012.02478.x

Links to Exploration step

ISTEX:7142F354623B50630689404D2E7A8043A3E31986

Le document en format XML

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Objectives
<p>To analyze the reliability of micro‐computed tomography (micro‐
<hi rend="fc">CT</hi>
) to assess bone density and the microstructure of the maxillary bones at the alveolar process in human clinics by direct comparison with conventional stereologic‐based histomorphometry.</p>
Materials and methods
<p>Analysis of osseous microstructural variables including bone volumetric density (
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
) of 39 biopsies from the maxillary alveolar bone was performed by micro‐
<hi rend="fc">CT</hi>
. Conventional stereologic‐based histomorphometry of 10 bone biopsies was performed by optic microscopy (
<hi rend="fc">OM</hi>
) and low‐vacuum surface electronic microscopy (
<hi rend="fc">SEM</hi>
). Percentages of bone between micro‐
<hi rend="fc">CT</hi>
and conventional stereologic‐based histomorphometry were compared.</p>
Results
<p>Significant positive correlations were observed between
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
and the percentage of bone (%Bone) analyzed by
<hi rend="fc">SEM</hi>
(
<hi rend="italic">r</hi>
 = 0.933,
<hi rend="italic">P</hi>
 < 0.001), by toluidine blue staining
<hi rend="fc">OM</hi>
(
<hi rend="italic">r</hi>
 = 0.950,
<hi rend="italic">P</hi>
 < 0.001) and by dark field
<hi rend="fc">OM</hi>
(
<hi rend="italic">r</hi>
 = 0.667,
<hi rend="italic">P</hi>
 = 0.05). The high positive correlation coefficient between
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
and trabecular thickness illustrates that a value of
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
upper than 50% squares with a bone presenting most of their trabecules thicker than 0.2 mm. The high negative correlation between
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
and trabecular separation shows that values of
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
upper than 50% squares with a bone presenting most of their trabecules separated less than 0.3 mm each other.</p>
Conclusion
<p>
<hi rend="fc">BV</hi>
/
<hi rend="fc">TV</hi>
assessed by micro‐
<hi rend="fc">CT</hi>
correlates with the percentage of bone assessed by conventional stereologic‐based histomorphometry. Micro‐
<hi rend="fc">CT</hi>
is a reliable technique to determine the bone density and the microstructure of the maxillary alveolar bone at the site of dental implant insertion.</p>
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<title type="main">Objectives</title>
<p>To analyze the reliability of micro‐computed tomography (micro‐
<fc>CT</fc>
) to assess bone density and the microstructure of the maxillary bones at the alveolar process in human clinics by direct comparison with conventional stereologic‐based histomorphometry.</p>
</section>
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<title type="main">Materials and methods</title>
<p>Analysis of osseous microstructural variables including bone volumetric density (
<fc>BV</fc>
/
<fc>TV</fc>
) of 39 biopsies from the maxillary alveolar bone was performed by micro‐
<fc>CT</fc>
. Conventional stereologic‐based histomorphometry of 10 bone biopsies was performed by optic microscopy (
<fc>OM</fc>
) and low‐vacuum surface electronic microscopy (
<fc>SEM</fc>
). Percentages of bone between micro‐
<fc>CT</fc>
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<title type="main">Results</title>
<p>Significant positive correlations were observed between
<fc>BV</fc>
/
<fc>TV</fc>
and the percentage of bone (%Bone) analyzed by
<fc>SEM</fc>
(
<i>r</i>
 = 0.933,
<i>P</i>
 < 0.001), by toluidine blue staining
<fc>OM</fc>
(
<i>r</i>
 = 0.950,
<i>P</i>
 < 0.001) and by dark field
<fc>OM</fc>
(
<i>r</i>
 = 0.667,
<i>P</i>
 = 0.05). The high positive correlation coefficient between
<fc>BV</fc>
/
<fc>TV</fc>
and trabecular thickness illustrates that a value of
<fc>BV</fc>
/
<fc>TV</fc>
upper than 50% squares with a bone presenting most of their trabecules thicker than 0.2 mm. The high negative correlation between
<fc>BV</fc>
/
<fc>TV</fc>
and trabecular separation shows that values of
<fc>BV</fc>
/
<fc>TV</fc>
upper than 50% squares with a bone presenting most of their trabecules separated less than 0.3 mm each other.</p>
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<p>
<fc>BV</fc>
/
<fc>TV</fc>
assessed by micro‐
<fc>CT</fc>
correlates with the percentage of bone assessed by conventional stereologic‐based histomorphometry. Micro‐
<fc>CT</fc>
is a reliable technique to determine the bone density and the microstructure of the maxillary alveolar bone at the site of dental implant insertion.</p>
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<note numbered="no" xml:id="clr2478-note-0001">This study is part of the doctoral thesis by Dr Raúl González‐García, MD, PhD, presented at the Universidad Autónoma de Madrid (Spain), School of Medicine, Department of Surgery, entitled: “Predictibilidad de la densidad ósea radiológica (DOR) en la determinación de las propiedades micro‐estructurales de los huesos maxilares en el sitio de colocación de implantes dentales: Análisis mediante tomografía computerizada (TC) de haz cónico y micro‐TC.” Year: 2011. PID: 41026.
<url href="http://hdl.handle.net/10486/7130">http://hdl.handle.net/10486/7130</url>
. The main author wants to thank all the Board members.</note>
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<abstract>To analyze the reliability of micro‐computed tomography (micro‐CT) to assess bone density and the microstructure of the maxillary bones at the alveolar process in human clinics by direct comparison with conventional stereologic‐based histomorphometry.</abstract>
<abstract>Analysis of osseous microstructural variables including bone volumetric density (BV/TV) of 39 biopsies from the maxillary alveolar bone was performed by micro‐CT. Conventional stereologic‐based histomorphometry of 10 bone biopsies was performed by optic microscopy (OM) and low‐vacuum surface electronic microscopy (SEM). Percentages of bone between micro‐CT and conventional stereologic‐based histomorphometry were compared.</abstract>
<abstract>Significant positive correlations were observed between BV/TV and the percentage of bone (%Bone) analyzed by SEM (r = 0.933, P < 0.001), by toluidine blue staining OM (r = 0.950, P < 0.001) and by dark field OM (r = 0.667, P = 0.05). The high positive correlation coefficient between BV/TV and trabecular thickness illustrates that a value of BV/TV upper than 50% squares with a bone presenting most of their trabecules thicker than 0.2 mm. The high negative correlation between BV/TV and trabecular separation shows that values of BV/TV upper than 50% squares with a bone presenting most of their trabecules separated less than 0.3 mm each other.</abstract>
<abstract>BV/TV assessed by micro‐CT correlates with the percentage of bone assessed by conventional stereologic‐based histomorphometry. Micro‐CT is a reliable technique to determine the bone density and the microstructure of the maxillary alveolar bone at the site of dental implant insertion.</abstract>
<note type="funding">Fundación Caja de Badajoz</note>
<note type="funding">FEDICOM (Fundación para el Estudio de la Implantología y la Cirugía Oral y Maxilofacial)</note>
<note type="funding">FUNDESALUD (Fundación para la Formación y la Investigación de los Profesionales de la Salud de Extremadura): Proyect PRIS - No. 05093; </note>
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<topic>bone architecture</topic>
<topic>bone density</topic>
<topic>bone micro‐structure</topic>
<topic>dental implants</topic>
<topic>histomorphometry</topic>
<topic>maxillary bones</topic>
<topic>micro‐computed tomography</topic>
<topic>optic microscopy</topic>
<topic>stereology</topic>
<topic>surface electronic microscopy</topic>
<topic>trabecular bone</topic>
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