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ePaper created 2014-10-07, 09:31:41 | version 1.30.01
I opinion _ CBCT in orthodontics airway passages on the 3-D images. This allows the clinician to study the airway changes that occur with growth, or the modifications of the airway volume induced by various pathologies or treatment.9 _Placement sites for temporary skeletal anchorage devices Cortical bone thickness and bone depth are the criteria usually used to assess sites for the placement of temporary anchorage devices. Based on these criteria, various studies suggest various placement sites.10, 11 For an individualised and patient-oriented approach, the bone quality and the distances between adjacent teeth can be deter- mined based on the patient’s initial CBCT data, with noneedforanyfurtherradiographicinvestigations (Figs. 15 & 16). _Surgical treatment planning for orthodontic surgical cases Another important clinical application of CBCT in orthodontics concerns surgical predictability with 3-D. Orthodontic surgical cases are very challenging, and 3-D images allow the clinician to plan the treatment virtually and to predict the changesinthehardandsofttissuewithmoreaccu- racy than with 2-D radiographs. CBCT images allow thesurgeontoperformvirtualsurgicalosteotomies and to translate the bone segments to the desired position for better control and predictability of the results.9 _Various endodontic findings Occasionally various endodontic findings, such as internal or external root resorption, apical peri- odontitis or retained root tips, can be observed based on the CBCT data taken for the orthodontic diagnosis and treatment planning (Fig. 17). These are important findings in the diagnostic phase of treatment because they can influence the treat- ment plan.1 _Conclusion It is now easy to accept the advantages that CBCT has over 2-D images. In the context of new technological achievements, 3-D images give the clinician information that is more detailed com- pared with that of 2-D radiographs and at a lower dose of radiation. Because of its lower radiation dose and growing availability, CBCT is likely to be- come the modality of choice for the evaluation of, diagnosis of and treatment planning for ortho- dontic patients._ Editorial note: A complete list of references is available fromthepublisher. Fig. 16_Mini-screw placement assessed with CBCT images. Fig. 17_Large endodontic lesion. 20 I cone beam3_2014 DrAndreiIacobgraduated fromtheFacultyofDentistryof theGrigoreT.PopaUniversity ofMedicineandPharmacyin IașiinRomania.Heisaspecialist inorthodonticsanddentofacial orthopaedics.DrIacobhas participatedinnumerous postgraduatetrainingprogrammesinRomaniaand abroad.HeisamemberoftheRothWilliamsInternational SocietyofOrthodontists,CharlesH.TweedInternational FoundationforOrthodonticResearchandEducation, andSocietyofEstheticDentistryinRomania. TRIDENTDENTALCLINIC Dr.Leonte8 050465Bucharest Romania andrei.iacob@clinicatrident.ro cone beam_contact Fig. 17 Fig. 16 CBE0314_16-20_Iacob 30.09.14 14:15 Seite 5