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Category: Volume 07 Issue 02 February 2019
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Title: Association of Panoramic Radiograph and Lateral Cephalogram for Evaluation of Dento-Facial Characteristics- A Cross Sectional Study

Authors: Dr Chandrashekhargouda Patil M.D.S, Dr P Sunil Kumar MDS, Dr Divya Kharat PG Student, Dr Tejashwini Patil BDS, D Ortho, Dr Prashanth Y MDS, Dr Sneha Hoshing MDS

 DOI: https://dx.doi.org/10.18535/jmscr/v7i2.156

Abstract

Introduction: In orthodontic practice to provide information such as axial inclination of teeth, maturation periods and surrounding tissues panoramic radiography is frequently used. This is usually the technique of choice because of its relatively low radiation exposure, patients’ comfort and significant amount of diagnostic information which is obtained by viewing all the teeth and basal bone at once. Therefore, panoramic radiography is essential orthodontic screening tool.

Aim: To determine whether the use of panoramic radiograph can be extended for evaluating dento-facial characteristics.

Materials and Method: Panoramic radiographs (OPG) and lateral cephalograms were obtained from 30 patients who includes 10 skeletal class I, 10 skeletal Class II and 10 skeletal class III patients were obtained and compared.

Results: The measurement obtained from panoramic radiograph when compared with their lateral cephalometric alternatives showed mild statistically significant difference. But with the help of regression equations obtained from this study it is possible to determine following cephalometric parameters using their panoramic constants respectively i.e Go-Gn/S-N using OMAND, Go-Gn/S-N using OCOND and ANS-PNS/Go-Me using OCOND with predictability percentage of 34.5%, 39.6% and 39.6% respectively.

Conclusion: It can be concluded that although panoramic radiograph can be used for assessing certain dentofacial characteristics using regression equation, the predictiblity percentage has been found to be very low. But considering radiation exposure twice for panoramic radiograph and cephalogram, panaromic radiograph can be used to assess certain parameters like Go-Gn/S-N for class II and class I also ANS-PNS/Go-Me in class I. Either left or right side measurements on panoramic radiograph can be used for assessing certain parameters instead of taking into consideration both sides separately because they are not significantly different.

Keywords: Panoramic radiograph, Dento-facial characteristics.

References

  1. Akcam MO, Altiok T, Ozdiler E. Panoramic radiographs: a tool for investigating skeletal pattern. Am J Orthod Dentofac Orthop. 2003;123:175-81.
  2. Weber JSU, Renato RA, Orivaldo RA, Jose FCH. Assessment of mesio-distal axial inclination through panoramic radiography. J Clin Orthod. 1990;24(3):166-73.
  3. Friedland B. Clinical radiological issues in orthodontic practice. Semin Orthod. 1998;4:64-78.
  4. Larhetm TA, Svanaes DB. Reproducibility of rotational panoramic radiography; Mandibular linear dimensions and Angles. Am J Orthod. 1986;90:45-51.
  5. Levandoski RR. Mandibular whiplash. Part I. An extension flexion injury of the temporom-andibular joints. FunctOrthod.1993;10:26-9.
  6. Piedra I. The Levandoski panoramic analysis in the diagnosis of facial and dental asymm-etries. J ClinPediatr Dent. 1995;20:15-21.
  7. Athanasios E Athanasiou. Orthodontic Cephalometry. Mosby-Wolfe.
  8. Scarfe WC, Eraso FE, Farman AG. Characteristics of the orthopantomograph OP 100. Dentomaxillofac Radiol. 1998;27:51-7.
  9. Farman TT, Kelly MS, Farman AG. The OP 100 Digipan: evaluation of the image layer, magnification factors, and dosimetry. Oral Surg Oral Med Oral Pathol Oral RadiolEndod. 1997;83:281-7.
  10. Larheim TA, Svanaes DB. Reproducibility of rotational panoramic radiography: mandibular linear dimensions and angles. Am J Orthod Dentofacial Orthop. 1986;90:45-51.
  11. Thanyakarn C, Hansen K, Rohlin M, Akesson L. Measurements of tooth length in pano-ramic radiographs. 1. The use of indicators. Dentomaxillofac Radiol. 1992;21:26-30.
  12. Oktay H. The relation between image magnification of orthopantomograph and facial index. Ataturk Univ Dis HekDerg. 1987;2:25-30.
  13. Turp JC, Vach W, Harbich K, Alt KW, Strub JR. Determining mandibular condyle and ramus height with the help of an orthopantomogram—a valid method? J Oral Rehabil. 1996;23:395-400.
  14. Bjork A, Skieller V. Normales und anomales des unterkiefers. Inf Kieferorthop 1984;1:55-110.

Corresponding Author

Dr Chandrashekhargouda Patil M.D.S        

Professor, PDU Dental College, Solapur