Program including abstracts as pdf available here
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Program including abstracts as pdf available here
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P 77<br />
Title<br />
COMPARISON OF HARD TISSuE MEASuREMENTS ON DIFFERENT TyPE OF CEPHALOMETRIC<br />
IMAGES<br />
Authors<br />
I. GAuRAV 1 , K. S. AHLuWALIA 2 , W. bRANTLEy 3<br />
Affiliations<br />
1 NIMS DENTAL COLLEGE, JAIPUR, INDIA, 2 JAIPUR DENTAL COLLEGE, OHIO STATE UNIVERSITY,<br />
USA, JAIPUR, INDIA, 3 OHIO STATE UNIVERSITY, COLUMBUS, USA<br />
Body<br />
OBJECTIVE: Aim of the study w<strong>as</strong> to compare various hard tissue me<strong>as</strong>urements done on various<br />
types of cephalometric images- hard, soft, scanned and photographed versions.<br />
METHODS: 60 lateral cephalograms were selected b<strong>as</strong>ed on inclusion & exclusion criteria, the<br />
same were evaluated and compared using 78 points,20 linear and angular parameters which<br />
comprised of 10 each dental and skeletal parameters. The radiographs films were <strong>as</strong>sessed in 4<br />
ways: manual (methods 1), soft copy of digital radiograph (method 2) scanned copy of digital<br />
radiograph (method 3) and photographed image of digital radiograph (method 4). For method<br />
2, 3,4 the <strong>as</strong>sessment of radiograph w<strong>as</strong> done using Digital Imaging Software. Ten cephalometric<br />
radiographs were retraced (manual tracing) and same radiographs were re-digitized using<br />
Vista Dent OCTM Digital Imaging Software to evaluate reproducibility of the landmarks and<br />
parameters.<br />
RESULTS: Angular & linear me<strong>as</strong>urements between soft copy and hard copy images (scanned<br />
version & digital photography version) have revealed statistically insignificant differences.<br />
Maxillary b<strong>as</strong>al length (Co-A), mandibular b<strong>as</strong>al length (Co-Pog) and lower facial height (ANS-<br />
Me) have revealed statistically significant differences between manual & digital tracings.The<br />
magnification error between soft & hard copy appears to have affected the larger linear me<strong>as</strong>urement<br />
w<strong>here</strong><strong>as</strong> smaller linear me<strong>as</strong>urements have revealed statistically insignificant values.<br />
Moreover,angular & linear me<strong>as</strong>urements among three different versions of digital cephalograms<br />
have revealed statistically insignificant differences.<br />
CONCLUSION:Soft copy, scanned & photographic versions of a digital lateral head cephalogram<br />
can be used for orthodontic diagnosis and treatment planning with same reliability <strong>as</strong> hard<br />
copy version of lateral cephalograms.<br />
Keywords<br />
ORAL DIAGNOSIS,CEPHALOMETRICS,COMPUTER IMAGEING<br />
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