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Title: Comparison Between Cephalometric Measurements Derived from Cone Beam Computed Tomography and Lateral Cephalogram
Authors: Mehwish Khan, Azhar Bangash Khan, Erum Amin, Fatima Ejaz, Sana Tariq, Faheem Nake Akhtar
Journal: Pakistan Armed Forces Medical Journal (PAFMJ)
Publisher: Army Medical College, Rawalpindi.
Country: Pakistan
Year: 2022
Volume: 72
Issue: Supplementary 2
Language: English
DOI: 10.51253/pafmj.v72iSUPPL-2.3465
Keywords: CephalometryCone beam computed tomographyLateral head film
Objective: To compare the mean craniofacial linear and angular measurements derived from cone beam computed tomography synthesized lateral cephalogram and those obtained from conventional cephalogram.
Study Design: Comparative cross-sectional study.
Place and Duration of Study: Armed Forces Institute of Dentistry (AFID), Rawalpindi Pakistan, from Feb 2017 to Nov 2018.
Methodology: Sample size was 32. Following linear measurements were evaluated; anterior facial height, right side and left side of mandibular length, nasal spine length, Upper and lower incisors to A-Pog distance. These measurements were obtained by both means i.e., conventional cephalogram and cone beam computed tomography synthesized cephalogram. Each of the measurement were taken twice by the single operator with a difference of two weeks.
Results: No significant difference was found among measurements obtained through lateral head film cephalograph and cone beam synthesized cephalograph except for mandibular length (for which p=0.04).
Conclusions: Cone beam computed tomography synthesized lateral cephalogram can be suggested as a substitute to conventional lateral cephalogram. Especially in conditions when cone beam computed tomography is already required for treatment planning thus reducing supplementary x- ray exposure and expenditure of an additional x-ray.
To compare the mean craniofacial linear and angular measurements derived from cone beam computed tomography synthesized lateral cephalogram and those obtained from conventional cephalogram.
Comparative cross-sectional study involving 32 participants. Linear measurements (anterior facial height, mandibular length, nasal spine length, upper and lower incisors to A-Pog distance) and one angular measurement (ANB) were obtained from both conventional cephalograms and CBCT synthesized cephalograms. Measurements were taken twice by the same operator with a two-week interval. Statistical analysis included t-tests and ANOVA.
graph TD
A["Participant Selection n=32"] --> B["Data Acquisition"];
B --> C["Conventional Cephalogram Measurement"];
B --> D["CBCT Synthesized Cephalogram Measurement"];
C --> E["Measurement Taken Twice"];
D --> E;
E --> F["Statistical Analysis t-test, ANOVA"];
F --> G["Comparison of Measurements"];
G --> H["Conclusion"];
The study suggests that CBCT synthesized lateral cephalograms can be a viable substitute for conventional lateral cephalograms, particularly when CBCT is already required for treatment planning, thereby reducing additional radiation exposure and cost. While most measurements were comparable, a significant difference was noted in mandibular length.
No significant difference was found between measurements obtained from lateral head film cephalographs and cone beam computed tomography synthesized cephalographs, except for mandibular length (p=0.04).
Cone beam computed tomography synthesized lateral cephalogram can be suggested as a substitute to conventional lateral cephalogram, especially when CBCT is already indicated for treatment planning, leading to reduced radiation exposure and expenditure.
* Sample size: 32 participants were included in the study.
* Study duration: The study was conducted from February 2017 to November 2018.
* Mandibular length difference: A significant difference (p=0.04) was found in mandibular length measurements between the two imaging modalities.
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