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ePaper created 2015-09-29, 13:02:58 | version 1.38.0
case report _ CBCT in diagnostic and treatment planning I The follow-up control took place 21 months post- operatively. At the clinical examination, the tooth appeared to be symptomless and the intraoral status was stated to be normal. For radiological examina- tion, a low dose CBCT scan was taken (CRANEX 3Dx, FOV 5x5,90kV,4mA,1,17s,DAP 40,5mGy/cm2)and it showed good healing in the apical area (Fig. 3). _Conclusion and discussion In this case, CBCT imaging technique was of great assistance to the dental team while making thetreatmentplanandfollowingupwiththepatient. The radiological findings confirmed the suspected pathosesandgaveafirmbasisforaccuratediagnosis and treatment planning. CBCT has turned out to be an ideal diagnostic tool in endodontics, which is a sensitive playfield of tiny details, where each move has to be carefully consid- ered and justified. CBCT literally provides endodon- tists with another dimension, and therefore greatly contributes to the efficiency of the clinical work. The benefits of CBCT may be summarised as follows: _Gives diagnostic confidence. _Acts as a navigator during the treatment process. _Makes clinical work safer. Concerning low-dose imaging programmes, low resolutionhasgenerallynotbeenanoptionforendo- dontic imaging due to the accuracy and precision of required image quality. The current advanced recon- struction algorithms, however, enable good enough image quality even with a low radiation dose, which makes the low dose programmes a reasonable alter- native to be considered when endodontic follow-up cases are concerned. Inthiscase,thelow-doseCBCTimagewasshownto be good enough for following up the healing process. The effective radiation dose was 4µSv, whereas the dosewiththesameFOV(5x5)andstandardresolution would have been five times higher, 20µSv, equaling thus the radiation dose of a native panoramic image. However, dose sensitivity did not come at the expense oftheimagequality,buttheneededdiagnosticdatafor thefollow-upevaluationwaswellprovidedbythelow doseoption._ Fig. 2_Axial, sagittal and coronal views of d17. Fig. 3_Follow-up CBCT with SOREDEX Minidose solution. I 27cone beam3_2015 Dr Sirpa Pöyry,DDS, Specialist in endodontics and cariology at Qmedical, Dental and OMF Clinic, Helsinki,Finland. cone beam_author Fig. 2 Fig. 3