en رادیولوژی دهان، فک و صورت Oral and Maxillofacial Radiology پژوهشي Research <p> <strong>Objectives</strong> To assess the influence of cone beam CT (CBCT) on treatment plan before surgical intervention of mandibular third molars and to identify radiographic factors with an impact on deciding on coronectomy. </p><p> <strong>Methods</strong> 186 mandibular third molars with an indication for surgical intervention underwent a radiographic examination with two methods: (1) panoramic imaging in combination with stereo-scanography and (2) CBCT. After the radiographic examination a treatment plan (TP) was established: either surgical removal (Sr) or coronectomy (Co). The first TP was based on the panoramic image and stereo-scanogram, while the second TP was established after CBCT was available. Logistic regression analyses were used to identify factors predisposing for Co after CBCT. </p><p> <strong>Results</strong> Treatment was performed according to the second TP. Agreement between the first and second TP was seen in 164 cases (88%), while the TP changed for 22 teeth (12%) after CBCT. Direct contact between the third molar and the mandibular canal had the highest impact on deciding on Co [odds ratio (OR) = 101.8, p < 0.001]. Direct contact was not a sufficient factor, however thus, lumen narrowing of the canal (OR = 38.9–147.2, p < 0.001) and canal positioned in a bending or a groove in the root complex (OR = 32.8, p = 0.016) were additional canal-related factors for deciding on Co. </p><p> <strong>Conclusion</strong> CBCT influenced the treatment plan for 12%. Direct contact in combination with narrowing of the canal lumen and canal positioned in a bending or a groove in the root complex observed in CBCT images were significant factors for deciding on coronectomy. </p><hr><p></p><p> <strong>Source: </strong>DentoMaxilloFacial Radiology </p><p> <a href="http://dmfr.birjournals.org/content/42/1/98870341.abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p> radiography ,coronectomy ,third molar 0 0 http://idai.ir/browse.php?a_code=A-10-32-1350&slc_lang=en&sid=1 L H Matzen louise.hauge.matzen@odontologi.au.dk 10031947532846006025 10031947532846006025 Yes Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark/Section of Oral and Maxillofacial Surgery and Oral Pathology, Department of Dentistry, Aarhus University, Aarhus, Denmark J Christensen 10031947532846006026 10031947532846006026 No Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark/Section of Oral and Maxillofacial Surgery and Oral Pathology, Department of Dentistry, Aarhus University, Aarhus, Denmark H Hintze 10031947532846006027 10031947532846006027 No Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark S Schou 10031947532846006028 10031947532846006028 No Section of Oral and Maxillofacial Surgery and Oral Pathology, Department of Dentistry, Aarhus University, Aarhus, Denmark A Wenzel 10031947532846006029 10031947532846006029 No Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark