Objective: To determine if measurements obtained from digital models from cone beam computed tomography (CBCT) images were comparable to the traditional method of digital study models by impressions.
Materials and Methods: Digital models of 30 subjects were used. InVivoDental (Anatomage, San Jose, Calif) software was used to analyze CBCT scans taken by a Galileos cone beam scanner (Sirona, Charlotte, NC) with a field of view of 15 3 15 3 15 cm3 and a voxel resolution of 0.125 mm. OrthoCAD (Cadent, Fairview, NJ) software was used to analyze impression scans of patients at different stages of orthodontic treatment. Impressions were taken using alginate and were mailed to OrthoCAD for digital conversion. The scans were then electronically returned in digital format for analysis. Continue reading Evaluation of CBCT Digital Models and Traditional Models Using the Little’s Index
By : Dr. Hani Alhebshi.
A systematic review is simply a structured and organized way to review many articles on specific topic and collecting their results and analyzing them with or without statistical methods; to reach a better conclusion on that topic under investigation.
If statistical methods were used ; It is called “Meta-analysis“.
For example :
If we want to make a systematic review on whether there is a relation between third molar impaction and late lower arch crowding , we raise the question : Is there a relation between them ?
Then we determine inclusion and exclusion criteria of papers that we are going to collect. They must be relevant to our topic. If articles found during our search has not matched our inclusion criteria ; they are ignored to others that match.
Then we organize data in tabular forms and analyze their results.
Analysis can summerize the net conclusion of whether they support or refute presence of any relation between molar impaction and lower arch crowding. Continue reading How Systematic reviews are conducted?
This is a general guideline of the sequence of archwires during treatment which can be modified according to the clinical situation.
( Summerized from a lecture of Dr. Zuhair Bakhsh ).
*For 0.018 x 0.025 slot brackets
Phase I (Alignment&Leveling):
Continue reading Sequence of archwires of 2 bracket prescriptions (0.018 and 0.022 slots)
Your final personal opinion about any scientific paper can be based on the collective answers of the following questions :
1. Title : is it appropriate and clear ?
2. Abstract : is it representative of the article and in correct form?
3. Purpose of the article : is it clearly stated ?
4. Errors of established facts or errors of interpretation of other’s work.
5. Is all the discussion relevant?
6. Are references the auther cited relevant to the topic?
7. Have any ideas been overemphasized or under emphasized?
Continue reading How to Critique an article ..
Tips by Prof. Ali Habeeb :
When patients comes to clinic in early mixed dentition and after addressing the problems that patient has , we should ask :
Is this the RIGHT TIME to start treatment?
if not , then we should just go for two phases of treatment plan.
1st phase is to just interfere to prevent future problems like correcting anterior crossbite or urgently provide space for delayed unerrupted upper lateral incisor or using a lingual arch or TPA to prevent mesial migration of permenant molars if early loss of upper Es has occured ….etc.
Continue reading TIPS : Interceptive Treatment
Toma AM, Zhurov A, Playle R, Ong E, Richmond S. Reproducibility of facial soft tissue landmarks on 3D laser- scanned facial images. Orthod Craniofac Res 12:33-42, 2009.
Background – The three-dimensional (3D) measuring technology is useful to inspect facial shape in three planes of space (X, Y, and Z). Recent work has been directed to analyse craniofacial morphology using facial soft tissue landmarks to identify facial differences among population. The reproducibility of facial landmarks is almost necessary to ensure accurate 3D facial measurements.
Objective – The aim of this study is to assess the reproducibility of facial soft tissue landmarks using laser-scan 3D imaging technology.
Subjects and Methods – Facial landmarks were assessed for 30 15½-year-old British-Caucasian children (15 males and 15 females). The sample was recruited from the Avon Longitudinal Study of Parents and Children (ALSPAC). The 3D facial images were acquired for each subject using two high-resolution Konica ⁄ Minolta laser scanners. Twenty-one facial landmarks (63 X, Y, and Z coordinates) were identiﬁed and recorded on each 3D facial image by two examiners. The reproducibility of landmarks identiﬁcation at 2-week interval was assessed for one of the examiners (intra-examiner). In addition, the reproducibility of landmarks was assessed between the two examiners (inter-examiner). Using Bland-Altman plots, both intra- and inter-examiner assessments had evaluated landmarks reproducibility in three dimensions for the sample divided by gender. The reproducibility of the 3D-coordinates for each landmark was considered under three categories (<0.5 mm, <1 mm, and >1 mm) for both intra- and inter- examiner reproducibility assessments.
Continue reading Reproducibility of facial soft tissue landmarks on 3D laser- scanned facial images.
Korbmacher H, Kahl-Nieke B, Schöllchen M, Heiland M. Value of two cone-beam computed tomography systems from an orthodontic point of view. J Orofac Orthop 68:278- 289, 2007.
SUMMARY by Dr. DALIA BASYONI :
* CBCT cannot replace OPG, which remains our primary imaging modality.
* In complex cases involving multiple findings in different regions, CBCT is more desirable than conventional radiographs.
* Standard operating procedures (SOP) to use CBCT:
• clefts of the lip, jaw and palate and cases of impacted teeth. Continue reading Value of two cone-beam computed tomography systems from an orthodontic point of view.
بسم الله الرحمن الرحيم والصلاة والسلام على أشرف الأنبياء والمرسلين سيدنا محمد وعلى آله وصحبه أجمعين.
In the name of Allah, the most compassionate the most merciful.
In the beginning, I would like to welcome all visitors of our specialized blog.This blog was mainly created to post , discuss and share scientific issues in Orthodontics especially what is related to periodic meetings held in King Abdulaziz University in Jeddah (Saudi Arabia ) as a part of the 4 to 5 years Saudi Board of Orthodontics program.The idea that led us to create this blog was inspired by our Professor ; Dr.Ali Habib who always spends his efforts for the success of this program.
In our weekly meetings we have a book review , literature review and one or two case presentations presented by the orthodontic residents and supervised by our great instructors.Summary of the articles presented as well as other scientific issues that were raised during the meetings will be posted in this blog and left open for comments.
I hope this blog will expand to include more activities in the future as well as find a way to benefit all orthodontists all over the world.
ENJOY Orthodontics .. It is a wonderful specialty 🙂
Dr. Hani Alhebshi
Orthodontist : )