Measurement of the consistency of patellar-tendon-bearing cast rectification

P. Convery, A. W. P. Buis, R. Wilkie, S. Sockalingam, A. Blair, B. McHugh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The quality of fit of a trans-tibial patellar-tendon-bearing (PTB) socket may be influenced by consistency in casting, rectification or alignment. This paper quantifies, for the first time, the variations in the rectified casts between two experienced prosthetists and the variation between the rectified casts of each individual prosthetist. Prosthetists A and B observed the hand casting of a typical trans-tibial amputee. Each prosthetist was supplied with 5 previously measured duplicated plaster models. The two prosthetists rectified the supplied plaster models based on their own interpretation of basic rectification guidelines. Both prosthetists operated in isolation. The re-measured rectified plaster model data was compared with the unrectified data. The extent of rectification at each of 1800 locations per plaster model was calculated. In zones of major rectification, the mean difference between prosthetists was quantified as 2mm and the standard deviation (SD) about that mean was ±1mm for each prosthetist. The co-ordinates of the apex of the fibular head for the 10 modified casts indicated that the maximum variation was in the axial direction with a SD of 4.3mm for prosthetist A and a SD of 2.8mm for prosthetist B. The lengths of the 5 plaster models rectified by prosthetist A indicated a SD of 0.2mm whereas the lengths of the 5 plaster models rectified by prosthetist B indicated a SD of 2.9mm.

LanguageEnglish
Pages207-213
Number of pages7
JournalProsthetics and Orthotics International
Volume27
Issue number3
DOIs
Publication statusPublished - 1 Dec 2003

Fingerprint

Bearings (structural)
Plaster
Amputees
Patellar Ligament
Tendons
Hand
Head
Guidelines
Casting
Direction compound

Keywords

  • patellar-tendon-bearing
  • rectified casts
  • prosthetics

Cite this

Convery, P. ; Buis, A. W. P. ; Wilkie, R. ; Sockalingam, S. ; Blair, A. ; McHugh, B. / Measurement of the consistency of patellar-tendon-bearing cast rectification. In: Prosthetics and Orthotics International. 2003 ; Vol. 27, No. 3. pp. 207-213.
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Measurement of the consistency of patellar-tendon-bearing cast rectification. / Convery, P.; Buis, A. W. P.; Wilkie, R.; Sockalingam, S.; Blair, A.; McHugh, B.

In: Prosthetics and Orthotics International, Vol. 27, No. 3, 01.12.2003, p. 207-213.

Research output: Contribution to journalArticle

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