A statistic approach to electronic moulding versus traditional plaster moulding
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Transcript of A statistic approach to electronic moulding versus traditional plaster moulding
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A statistic approach to electronic moulding versus traditional
plaster moulding
Jean Claude de Mauroy, Frédéric Barral, Cyril Lecante
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BackgroundElectronic moulding tends to gradually replace the
plaster moulding. Is it as effective?There is no study on the results obtained by this
process for the scoliosis. In the department of orthopaedic medicine of the
Clinique du Parc - Lyon, the electronic moulding replaced the traditional plastered moulding in May, 2008.
Are the radiological angular corrections better in brace?
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Adjusting position
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Comparing virtual vertebral reconstruction and real X ray
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Full 3D Electronic Moulding
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automatic modification of the shape
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Methodology
The angular correction of 166 plaster moulding scoliosis was compared with the correction of 117 electronic moulding scoliosis (random).
Both mouldings were made by the same physician. The electronic moulding has been produced using
the full 3D system ORTEN. The curves have been grouped into thoracic
(n=127), thoracolumbar(n=65) and lumbar(n=206).
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Init Plaster cast
Lumbar brace
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Results
• The average initial angle is: 28,19 (+-9,21) for thoracic, 28,11 (+-9,34) for thoraco-lumbar and 25,86 (+-7,04) for lumbar curves.
• The angular reducibility is 54 % in braces for the thoracic curvatures, 69 % for the thoraco-lumbar curvatures and of 73 % for the lumbar curvatures, which corresponds to the usual results of the Lyon management.
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Lomb
Thor
Th-Lom
73 %
206 curves127 curves
65 curves
69 %
54 %
Anatomo-radiological classification
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In Brace angular reducibility
ThoracicThor-Lumb
Lumbar
0
10
20
30
40
50
60
70
80
Total
> 30°
classification Pe
rcen
tage
54 % 69 % 73 %
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Comparative resultsN= 166 – Traditional moulding N = 117 cad-cam moulding
Thoracic before treatment 28,70 (+-8.85 ) 27,75 (+-9.60 )
Thoracic in plaster cast 13,33 (+-8.15 ) 15,72 (+-8.83 )
Thoracic in brace 14,43 (+-8.47 ) 13,19 (+-7.88 )
Thor-lumbar before treatment 28,21 (+-9.38 ) 28,61 (+-9.12 )
Thor-lumbar in plaster cast 8,82 (+-8.94 ) 9,35 (+-8.43 )
Thor-lumbar in brace 11,37 (+-9.82 ) 8,88 (+-8.37 )
Lumbar before treatment 26,31 (+-6.86) 25,31 (+-7.10 )
Lumbar in plaster cast 8,02 (+-6.69 ) 8,23 (+- 7.70)
Lumbar in brace 8,78 (+-7.70 ) 6,85 (+7.34- )
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Electronic versus Plaster Moulding
ThoracicThor-Lumb
Lumbar
0
1
2
3
4
5
6
Total
> 30°
Electronic Moulding is better im
prov
emen
t
3.63°3.02°
2.14°
5.44°4.75°
3.89°
But nonsignificant
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Conclusion
Such results are in favour of the electronic moulding which remains however delicate and require:
a precise position of the patient during the surface topography and
well trained orthotic technicians.