Please activate JavaScript!
Please install Adobe Flash Player, click here for download

DTME1010

Additionally, in cases in which teeth are assessed after trauma and in emergency cases, its appli - cation can be a useful aid in reaching a proper diagno- sis and treatment ap- proach.46,55,73–74 Recently, owing to its reliabil- ity and accuracy, CBCT has also been used to evaluate the canal preparation in different instru- mentation techniques.75–76 Implantology With increased demand for replacing missing teeth with dental implants, accurate meas- urements are needed to avoid damage to vital structures. This was achievable with conven- tional CT. However, with CBCT giving more ac curate measure- ments at lower dosages, it is the preferred option in implant den- tistry today (Figs. 4a & b).2,6,11,18,70,77–89 With new software that con- structs surgical guides, damage is also reduced further.77,84,90–93 Heiland et al.94 describe a tech- nique in which CBCT was used inter-operatively in two cases to navigate the implant insertion following microsurgical bone transfer. CBCT enables the assess- ment of bone quality and bone quantity.18,26,70,80–81,85,88,95–97 This leads to reduced implant failure, as case selection can be based on muchmorereliableinformation. This advantage is also used for post-treatment evaluation and to assess the success of bone grafts (Figs. 5a–d).18,88 Orthodontics Orthodontists can use CBCT images in orthodontic assess- ment and cephalometric analy- sis. 6,70,84,98–99 Today, CBCT is al- ready the tool of choice in the as- sessment of facial growth, age, airway function and distur- bances in tooth eruption.100–103 CBCT is a reliable tool in the assessmentoftheproximitytovi- tal structures that may interfere with orthodontic treatment.104–105 In cases in which mini-screw im- plants are placed to serve as a temporary anchorage, CBCT is useful for ensuring a safe inser- tion106–108 and to assess the bone density before, during and after treatment (Fig. 6).109–110 Having different views in one scan, such as frontal, right and left lateral, 45-degree views and sub-mental, also adds to the ad- vantagesofCBCT.111,124 Astheim- ages are self-corrected from the magnification to produce or- thogonal images with 1:1 ratio, higher accuracy is ensured. CBCT is thus considered a better option for the clinician.113 Temporomandibular joint disorder One of the major advantages of CBCT is its ability to define the truepositionofthecondyleinthe fossa, which often reveals possi- ble dis - location of the disk in the joint, and the extent of transla- tion of the condyle in the fossa.18,56,114 With its accuracy, measurements of the roof of the glenoid fossa can be done eas- ily.115–116 Another advantage of some of the available devices is their ability to visualise soft tis- sue around the TMJ, which may reduce the need for magnetic resonance imaging in these cases.117 Owing to these advantages, CBCT is the imaging device of choice in cases of trauma, pain, dysfunction, fibro-osseous anky- losis and in detecting condylar cortical erosion and cysts.70,87,118–120 With the use of the 3-D features, the imageguided puncture technique, which is a treatment modality for TMJ disk adhesion, can safely be per- formed.121 Periodontics CBCT can be used in assess- ing a detailed morphologic de- scription of the bone because it has proved to be accurate with only minimal error margins.56,122 The measurements proved to be as accurate as direct measure- ments with a periodontal probe.56,123 Furthermore, it also aids in assessing furcation in- volvements.20,56,116 CBCT can be used to detect buccal and lingual defects, which was previously not possi- ble with conventional 2-D radi- ographs.56,124 Additionally, owing to the high accuracy of CBCT measurements, intra-bony de- fectscanaccuratelybemeasured and dehiscence, fenestration de- fects and periodontal cysts as- sessed.56,125–127 CBCT has also proved its superiority in evaluat- ing the outcome of regenerative periodontal therapy.124 General dentistry Based on the available litera- ture, CBCT is not justified for use DENTALTRIBUNE Middle East & Africa Edition Media CME 7 Dental Tribune Middle East & Africa in collaboration with CAPP introduce to the market the new project mCME - Self Instruction Program. mCME gives you the opportunity to have a quick and easy way to meet your continuing education needs. mCME offers you the flexibility to work at your own pace through the material from any location at any time. The content is international, drawn from the upper echelon of dental medicine, but also presents aregionaloutlookintermsofperspectiveandsubject matter. How can professionals enroll? They can either sign up for a one-year (10 exercises) by subscription for the magazine for one year ($65) or pay ($20) per article. After the payment, partici- pants will receive their membership number and will be able to attend to the program. How to earn CME credits? Once the reader attends the distance-learning pro- gram, he/she can earn credits in three easy steps: 1. Read the articles. 2. Take the exercises 3. Fill in the Questionnaire and Submit the answers by Fax (+971 4 36868883) or Email :info@cappmea.com After submission of the answers, (name and mem- bership number must be included for processing) theywillreceivetheCertificatewithuniqueIDNum- ber within 48 to 72hours. Articles and Questionnaires will be available in the website after the publication. www.cappmea.com MEDIA CME Self-Instruction Program For more information: e-mail: info@dental-tribune.ae, Tel: + 971 4 391 0257, Fax: + 971 4 366 4512 Mob: + 971 50 6625011 Fig. 6Fig. 5d Intra-oral (F speed, rectangular collimator) 0.001 mSv Intra-oral (E speed, round collimator) 0.004 mSv Full-mouth set (E speed, round collimator) 0.080 mSv Lateral cephalogram (F speed, rare-earth screen) 0.002 mSv Dental panoramic technique (F speed, rare-earth screen) 0.015 mSv CBCT (both jaws) 0.068 mSv Hospital CT scan (both jaws) 0.6 mSv Table II Fig. 5d_Total buccal plate destruction is evident in this CBCT image. Fig. 6_CBCT image to assess the bone density during treatment. Fig. 5a Fig. 5b Fig. 5c Fig. 5a_Clinical picture of multiple implants placed in 2005. Fig. 5b_Peri-apical radiograph for the implants replacing teeth #8 and #9. Little data can be collected from such an image. Fig. 5c_The CBCT image clearly demonstrates the amount of bone loss. Table II_Typical doses of various dental radiological procedures.