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Radiographic interproximal angulations: implications for rotational panoramic radiography
W C Scarfe1, P Nummikoski, W D McDavid
1Department of Diagnosis and General Dentistry, University of Louisville, KY.
Oral Surgery, Oral Medicine, and Oral Pathology
|November 1, 1993
Summary
Optimal dental radiography beam angulation varies significantly. Current panoramic machines show discrepancies, particularly in the premolar region, with specific models showing less deviation from optimal angles.
Area of Science:
- Dentistry
- Radiology
- Medical Imaging
Background:
- Accurate dental radiography is crucial for diagnosis and treatment planning.
- Panoramic dental X-ray machines aim for optimal beam angulation but may have limitations.
Purpose of the Study:
- To determine optimal beam angulations for dental radiography.
- To compare the angulations of current panoramic machines with optimal angles.
Main Methods:
- Axial radiographs of 160 subjects were analyzed.
- Intermeatal and midsagittal lines were used to establish coordinate axes.
- Interproximal tangents and angulations were digitized and calculated.
Main Results:
- Interproximal angulations varied greatly but averaged around 90 degrees.
- Optimal beam angulations differed from current panoramic machine central ray angulations.
- Discrepancies in premolar region angulation ranged from 15 to over 40 degrees.
Conclusions:
- OrthOralix SD and PM 2002 CC showed least deviation from optimal angulation.
- Planmeca PM 2002 CC offered better angulation in the canine/premolar region.
- OP5/10 was comparable to OrthOralix SD in the molar region.