comparison of linear dimensions and angular measurements on panoramic images taken with two machines

نویسندگان

tahmineh razi

sedighe razi

چکیده

background and aims. panoramic radiography is a method widely used because of low absorbed dose in patients (approximately 10 times less than that in the full mouth survey), reasonable cost and time. disadvantages of this radiography technique are magnification and distortion as a result of unequal magnification, which can influence dimensional and angular measurements used in clinical dentistry to determine root length, dental arch space, relative angulations of teeth, and implant site assessment. the aim of this study was comparison of linear dimensions and angular measurements on panoramic images taken with two machines (planmeca and panoura). materials and methods. twenty radiographs taken with each apparatus from a human dry skull were scanned. horizontal, vertical and angular dimensions were measured on the skull, which were compared along with the images using corel draw software, v13. results. independent t-test analysis showed that horizontal magnification assessed on images from panoura was more than that from planmeca (p < 0.00025). there were no significant differences between the two groups in vertical dimensions (p = 0.66). mean magnification of angular measurements assessed on images from panoura was less than that from planmeca (p < 0.00025). independent t-test analysis showed that distortion of planmeca images were more than that of panoura. one sample t-test showed that angular measurements were more reliable than linear dimensions. conclusion. panoramic radiography technique can be used for evaluation of angles but it is better to use other radiography techniques for vertical and horizontal measurements.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Comparison of Linear Dimensions and Angular Measurements on Panoramic Images Taken with Two Machines

BACKGROUND AND AIMS Panoramic radiography is a method widely used because of low absorbed dose in patients (ap-proximately 10 times less than that in the full mouth survey), reasonable cost and time. Disadvantages of this radiography technique are magnification and distortion as a result of unequal magnification, which can influence dimensional and angular measurements used in clinical dentistr...

متن کامل

Evaluation of the accuracy of linear and angular measurements on panoramic radiographs taken at different positions

PURPOSE This study assessed the accuracy of linear and angular measurements on panoramic radiographs taken at different positions in vitro. MATERIALS AND METHODS Two acrylic models were fabricated from a cast with normal occlusion. Straight and 75° mesially and lingually angulated pins were placed, and standardized panoramic radiographs were taken at standard position, at an 8° downward tilt ...

متن کامل

Accuracy of linear and angular measurements on panoramic radiographs taken at various positions in vitro.

The accuracy of measurement of tooth length and angulation on dental panoramic tomograms (DPTs) is thought to be highly dependent on head positioning technique. A model representing the dentition and the functional occlusal plane was designed using an acrylic framework and stainless steel wires. The aim was to investigate whether varying the position of the model affects the linear and angular ...

متن کامل

a comparison of teachers and supervisors, with respect to teacher efficacy and reflection

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...

15 صفحه اول

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
journal of dental research, dental clinics, dental prospects

جلد ۳، شماره ۱، صفحات ۷-۱۰

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023