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Assement of the Precision of Horizontal Measurements on Orthopantomographic Radiographs

Amir Ćatić ; Dom zdravlja “Dubrava”, Zagreb, Hrvatska
Asja Čelebić ; Zavod za mobilnu protetiku Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Malita VALENTIĆ PERUZOVIĆ ; Zavod za mobilnu protetiku Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Adnan Ćatović ; Zavod za fiksnu protetiku Stomatološkog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Ivan Vinter ; Zavod za anatomiju Medicinskog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Ivana Muretić ; Dom zdravlja “Črnomerec”, Zagreb, Hrvatska

Sažetak

Objectives: The aim o f this study was to evaluate the precision of
the horizontal dimensional measurements on orthopantomographic images by the Orthophos D3200® (Siemens, Germany), and therefore to evaluate their dimensional reliability. Material and Methods: Different distances denoted by metal markers were measured on 25 dry mandibles. The same mandibles were then positioned in an orthopantomographic machine Orthophos D3200®
(Siemens, Germany) and their radiographic images were made. Measurements o f the same distances were repeated on the panoramic images and compared to the results o f the measurements on the dry mandibles. All results were statistically analyzed. Results: The calculated magnification factors for the horizontal measurements,
not traversing the midline o f the mandible, ranged between 0.97 and 1.065. These values were smaller than those declared by the manufacturer o f the X-ray device (1.22x), with a statistically significant difference between the indices. The calculated magnification factors for the horizontal measurements traversing the midline of the mandible ranged from 1.45 to 1.85, which was significantly larger than the declared values by the manufacturer o f the orthopantomographic machine. Conclusion: Measurements made only on one side o f the mandible were very close to actual dimensions of dry mandibles, and therefore representative for those distances. The measurements which extended across the midline o f the mandible were greatly enlarged, due to a large magnification factor. Thus, the distances which traverse the midline o f mandible should not be measured.

Ključne riječi

panoramic radiography; magnification index

Hrčak ID:

97763

URI

https://hrcak.srce.hr/97763

Datum izdavanja:

15.3.1998.

Podaci na drugim jezicima: hrvatski

Posjeta: 1.045 *