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:: Volume 2, Issue 1 (March- 2013) ::
Caspian J Dent Res 2013, 2(1): 25-31 Back to browse issues page
Accuracy of mandibular vertical linear measurement in panoramic and tomography images
Ehsan Moudi , Sina Haghanifar , Hoora Hadian * , Ali Bijani , Mirmahmood Safinia, Nika Bahemmat
,Department of Oral & Maxillofacial Radiology, Shahid Beheshti University of Medical Sciences, Tehran-Iran. , h.haadian@yahoo.com
Abstract:   (8966 Views)

Introduction: The measurement precision of jaw is important for surgery or installing implants. Preimplant radiographs are important part of clinical evaluations before implant surgery. For choosing location, we should consider the important anatomical structures like mental foramen, inferior alveolar canal, nasal cavity and maxillary sinus.It is important to know the measurement accuracy of radiographic techniques. The purpose of this study was to compare mandibular vertical linear measurement in panoramic and tomography images.

Methods: Three forms of mandible from dry adult human skulls were used in this study (triangle, square and ellipse). For each mandible, surgical stent was made using transparent with gold standard.acryl. A thin tube was placed in the stents in three regions (incisors, premolars and molars) to set gutta-percha. Then, the panoramic view and conventional tomography were obtained. Four oral and maxillofacial radiologists measured the vertical dimension in panoramic and conventional tomography. Finally, each mandible was sectioned in the marked sections and was measured by a digital caliper (gold standard) and compared with conventional tomography and panoramic view .The obtained data was analyzed using SPSS18 software and student t-test, Pearson correlation coefficient and non parametric Mann-Whitney Test.

Results: The mean difference between the panoramic and gold standard linear vertical dimension values in premolar and molar regions was above 1mm and above 2mm in incisor region. The mean difference between conventional tomography and gold standard measurements in all three regions was 1mm.

Conclusions: The linear measurement of vertical dimension in conventional tomography was more precise than panoramic. The use of a 2.0 mm safety margin in the evaluation of implant sites was recommended.In incisor area, the other radiography methods like CBCT was suggested.

Keywords: Implant, Panoramic, Radiography, Conventional tomography
Full-Text [PDF 412 kb]   (1797 Downloads)    
Type of Study: Original Article | Subject: Oral & Maxillofacial Radiology
* Corresponding Author Address: Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran-Iran.
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Moudi E, Haghanifar S, Hadian H, Bijani A, Safinia M, Bahemmat N. Accuracy of mandibular vertical linear measurement in panoramic and tomography images. Caspian J Dent Res. 2013; 2 (1) :25-31
URL: http://cjdr.ir/article-1-68-en.html

Volume 2, Issue 1 (March- 2013) Back to browse issues page
مجله تحقیقات دندانپزشکی کاسپین Caspian Journal of Dental Research
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