A Comparison of Hand Tracing and Computerised Cephalometric Analysis
Citation:
Marron, Caroline Mary, A Comparison of Hand Tracing and Computerised Cephalometric Analysis, Trinity College Dublin.School of Dental Sciences, 2021Download Item:
Abstract:
The aim of this study was to determine if automated computerised cephalometric analysis
with Planmeca Romexis® (Version 5.1.1.R) dental imaging software is as accurate as
traditional hand tracing in terms of landmark identification, angular and linear
measurements.
Pre-treatment lateral cephalograms for a selection of patients undergoing comprehensive
orthodontic treatment were collected and irreversibly anonymised. Using a sample of eight
radiographs, an inter-examiner reliability investigation was carried out to measure the level
of inter-rater agreement of cephalometric analysis by hand tracing between the primary
investigator and two Consultant Orthodontists. Using a sample of thirteen radiographs, an
intra-examiner reliability investigation was carried out to measure the level of intra-rater
agreement for cephalometric analysis by hand tracing of the primary investigator against
themselves at two different time points. To compare the results of automated
computerised cephalometric analysis using Planmeca Romexis® (Version 5.1.1.R) dental
imaging software with those obtained by traditional hand tracing, 68 lateral cephalograms
were manually traced by the primary investigator to include 16 anatomical landmarks and
15 angular and linear measurements. The radiographs were then analysed by the
automated software programme. The accuracy of the computer software programme was
assessed by comparing the automated landmark locations and measurements to the hand
traced landmark locations and measurements. Accuracy for automatic landmark
identification was recorded as successful detection within a 2.0mm precision range of the
hand traced landmark. Accuracy of automatic angular and linear measurements was
recorded within 2° or 2mm of the hand traced measurements respectively. Intraclass correlation coefficients were calculated to measure the level of inter-rater agreement.
Bland-Altman plots were constructed to analyse the level of inter-rater agreement.
Planmeca Romexis® (Version 5.1.1.R) dental imaging software programme had a landmark
successful detection rate (SDR) in a 2.0mm precision range of 82.08% with a mean radial
error of 1.25 ± 0.91mm. This is comparable with the inter-rater reliability between two
clinical experts. Gonion and A-point were the least accurately identified landmarks. The
average success rate for all angular and linear measurements within 2° or 2mm respectively
was 80.98%. ICCs for all measurements ranged between 0.73 and 1.00 indicating moderate
to excellent levels of agreement.
Automated cephalometric analysis with Planmeca Romexis® (Version 5.1.1.R) dental
imaging software is suitable for clinical use, however, more accurate measurements may
be possible if landmark locations are checked and amended if necessary prior to performing
an analysis.
Description:
APPROVED
Author: Marron, Caroline Mary
Advisor:
Burns, AngusGarvey, Thérèse
Publisher:
Trinity College Dublin. School of Dental Sciences. Discipline of Dental ScienceType of material:
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