Assessment of Bone Density in the Posterior Maxilla Based on Hounsfield Units to Enhance the Initial Stability of Implants
Identifieur interne : 003762 ( Istex/Corpus ); précédent : 003761; suivant : 003763Assessment of Bone Density in the Posterior Maxilla Based on Hounsfield Units to Enhance the Initial Stability of Implants
Auteurs : Motofumi Sogo ; Kazunori Ikebe ; Tsung-Chieh Yang ; Masahiro Wada ; Yoshinobu MaedaSource :
- Clinical Implant Dentistry and Related Research [ 1523-0899 ] ; 2012-05.
English descriptors
- KwdEn :
- Bone anatomy, Bone densities, Bone density, Bone quality, Clin, Clin implant dent relat, Clinical implant dentistry, Component percentages, Cortical bone, Dentistry, Edentulous, Higher failure rates, Immediate loading, Implant, Implant stability, Implantation, Individual maxillae, Initial stability, Kazunori ikebe, Maxilla, Maxillary, Maxillary regions, Misch, Oral maxillofac implants, Oral rehabilitation, Osaka university graduate school, Posterior, Posterior maxilla, Posterior maxillae, Voxel, Voxel numbers.
- Teeft :
- Bone anatomy, Bone densities, Bone density, Bone quality, Clin, Clin implant dent relat, Clinical implant dentistry, Component percentages, Cortical bone, Dentistry, Edentulous, Higher failure rates, Immediate loading, Implant, Implant stability, Implantation, Individual maxillae, Initial stability, Kazunori ikebe, Maxilla, Maxillary, Maxillary regions, Misch, Oral maxillofac implants, Oral rehabilitation, Osaka university graduate school, Posterior, Posterior maxilla, Posterior maxillae, Voxel, Voxel numbers.
Abstract
Purpose: The poor bone quality that exists in the posterior maxilla is associated with lower initial stability and higher failure rates in implants. This study examined the bone densities of edentulous posterior maxillae by computed tomography (CT).
Url:
DOI: 10.1111/j.1708-8208.2011.00423.x
Links to Exploration step
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<profileDesc><abstract xml:lang="en" style="main"><head>ABSTRACT</head>
<p><hi rend="bold">Purpose:</hi>
The poor bone quality that exists in the posterior maxilla is associated with lower initial stability and higher failure rates in implants. This study examined the bone densities of edentulous posterior maxillae by computed tomography (CT).</p>
<p><hi rend="bold">Materials and Methods:</hi>
Based on CT images, the voxel values representing implant replacement in the posterior maxillary regions of 30 patients were calculated in the range from 150 to 2,000 Hounsfield units (HU). The bone densities of these regions were categorized according to Misch's classification and compared among individuals and between sexes.</p>
<p><hi rend="bold">Results:</hi>
The average of the median individual CT values was 495 HU (95% confidence interval: 442–547 HU) and was significantly higher in males than in females. Most of the bone in the posterior maxillae was classified as D3 (350–850 HU) or D4 (150–350 HU) according to Misch's classification, comprising 50% and 32% of the entire regions, respectively.</p>
<p><hi rend="bold">Conclusions:</hi>
More than 80% of the edentulous posterior maxillae consisted of porous cortical crest or no cortical bone according to CT, although the bone densities varied markedly among individuals. More detailed assessments of bone density may be useful to enhance initial stability of implants in the posterior maxilla.</p>
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<correspondenceTo>Dr. Kazunori Ikebe, DDS, PhD, Department of Prosthodontics and Oral Rehabilitation, Osaka University Graduate School of Dentistry, 1–8 Yamadaoka, Suita 565‐0871, Osaka, Japan; e‐mail: <email normalForm="ikebe@dent.osaka-u.ac.jp">ikebe@dent.osaka‐u.ac.jp</email>
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<titleGroup><title type="main">Assessment of Bone Density in the Posterior Maxilla Based on Hounsfield Units to Enhance the Initial Stability of Implants</title>
<title type="shortAuthors">Clinical Implant Dentistry and Related Research, Volume *, Number *, 2011</title>
<title type="short">Bone Density in Posterior Maxilla by CT Value</title>
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<familyName>Sogo</familyName>
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<creator creatorRole="author" xml:id="cr3" affiliationRef="#a3"><personName><givenNames>Tsung‐Chieh</givenNames>
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<keywordGroup xml:lang="en"><keyword xml:id="k1">bone density</keyword>
<keyword xml:id="k2">CT value</keyword>
<keyword xml:id="k3">dental implant</keyword>
<keyword xml:id="k4">Hounsfield unit</keyword>
<keyword xml:id="k5">maxillary molar region</keyword>
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<abstractGroup><abstract type="main" xml:lang="en"><title type="main">ABSTRACT</title>
<p><b>Purpose:</b>
The poor bone quality that exists in the posterior maxilla is associated with lower initial stability and higher failure rates in implants. This study examined the bone densities of edentulous posterior maxillae by computed tomography (CT).</p>
<p><b>Materials and Methods:</b>
Based on CT images, the voxel values representing implant replacement in the posterior maxillary regions of 30 patients were calculated in the range from 150 to 2,000 Hounsfield units (HU). The bone densities of these regions were categorized according to Misch's classification and compared among individuals and between sexes.</p>
<p><b>Results:</b>
The average of the median individual CT values was 495 HU (95% confidence interval: 442–547 HU) and was significantly higher in males than in females. Most of the bone in the posterior maxillae was classified as D3 (350–850 HU) or D4 (150–350 HU) according to Misch's classification, comprising 50% and 32% of the entire regions, respectively.</p>
<p><b>Conclusions:</b>
More than 80% of the edentulous posterior maxillae consisted of porous cortical crest or no cortical bone according to CT, although the bone densities varied markedly among individuals. More detailed assessments of bone density may be useful to enhance initial stability of implants in the posterior maxilla.</p>
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<abstract>Purpose: The poor bone quality that exists in the posterior maxilla is associated with lower initial stability and higher failure rates in implants. This study examined the bone densities of edentulous posterior maxillae by computed tomography (CT).</abstract>
<abstract>Materials and Methods: Based on CT images, the voxel values representing implant replacement in the posterior maxillary regions of 30 patients were calculated in the range from 150 to 2,000 Hounsfield units (HU). The bone densities of these regions were categorized according to Misch's classification and compared among individuals and between sexes.</abstract>
<abstract>Results: The average of the median individual CT values was 495 HU (95% confidence interval: 442–547 HU) and was significantly higher in males than in females. Most of the bone in the posterior maxillae was classified as D3 (350–850 HU) or D4 (150–350 HU) according to Misch's classification, comprising 50% and 32% of the entire regions, respectively.</abstract>
<abstract>Conclusions: More than 80% of the edentulous posterior maxillae consisted of porous cortical crest or no cortical bone according to CT, although the bone densities varied markedly among individuals. More detailed assessments of bone density may be useful to enhance initial stability of implants in the posterior maxilla.</abstract>
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