Influence of Head Orientation in Linear Measurement for Implant Planning in Cone Beam Computed Tomography.
Use of dental implants in edentulous patients has become a common treatment modality. Treatment of such implants requires radiographic evaluation, and in most cases several different imaging techniques are necessary in order to evaluate the height, width and the structure of bone at implant site. The aim of this study was to evaluate the influence of head orientation in linear measurement for implant planning in cone beam computed tomography (CBCT).



In the present in vitro study, 11 human dry mandibles were used. The width and height of bone at the central, canine and molar teeth areas were measured on the left and right sides by using digital calipers (as gold standard) and on CBCT images with Reaxis option and no Reaxis. Data were analyzed with Statistical package for the social sciences (SPSS) 18, using pair t-test, Tukey test and intraclass correlation (ICC).



Data were collected by evaluation of 11 skulls and 66 samples on the whole. There were no significant differences in bone width in any area in both Reaxis and no Reaxis option (p > 0.05). There were significant differences in bone height in the central (p = 0.005) and molar teeth areas (p = 0.010). The results did not show any significant differences between the observers (p = 0.329).



Using the Reaxis option does not affect the measurement of bone width, while use of this option can make a significant difference for height measurements.
Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran.
Abbas
A
Shokri
Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran.
Samira
S
Khajeh
Postgraduate Student, Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran Phone: +98-9188362065, e-mail: atefehkhavid@gmail.com.
Atefeh
A
Khavid
Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran.
Sara
S
Tabari
Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran.
Shiva
S
Yarmohammadi
D000539:Alveolar Process / Q000000981:diagnostic imaging; D002508:Cephalometry / Q000379:methods*; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003481:Cuspid / Q000000981:diagnostic imaging; D003724:Dental Arch / Q000000981:diagnostic imaging; D015921:Dental Implants; D006257:Head / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D066298:In Vitro Techniques; D007180:Incisor / Q000000981:diagnostic imaging; D008334:Mandible / Q000000981:diagnostic imaging; D008963:Molar / Q000000981:diagnostic imaging; D010347:Patient Care Planning; D056888:Patient Positioning / Q000379:methods*
D015921:Dental Implants
Bone width; Bone height; CBCT; Head orientation; Reaxis option; Reslice option