Lubinus SP II stems are cemented either line-to-line with the largest broach or one-size undersized. The purpose of this study was to compare both implantation techniques. We used 18 polymeric stem replicas cemented line-to-line and undersized in paired cadaveric femora and analyzed them with CT scan images. Cementing Lubinus stems line-to-line resulted in higher medullary canal-filling indices (28.26 ± 4.10%), thinner cement mantles (3.29 ± 0.40 mm), more cement defects (5.12 ± 1.69%) and more areas of thin cement (23.81 ± 7.13%) than undersizing (respectively : 23.61 ± 4.24%, 3.62 ± 0.43 mm, 1.48 ± 2.04%, 15.11 ± 5.93%). In both settings, over 80% of areas of thin or deficient cement were supported by cortex. Using a line-to-line technique, adequate stem alignment was achieved without distal centralizer. Undersizing the stem and using a distal centralizer reduced the incidence of distal cement defects by a factor 10. While stems cemented line-to-line might have mechanical advantages, undersizing and using distal centralizers reduced potential pathways for debris migration to the bone-cement interface.
Scheerlinck, T, De Mey, J & Deklerck, R 2009, 'Impact of stem-broach sizing on the cement mantle of Lubinus SP II stems. A CT scan analysis.', Acta Orthopædica Belgica, vol. 75, pp. 346-353.
Scheerlinck, T., De Mey, J., & Deklerck, R. (2009). Impact of stem-broach sizing on the cement mantle of Lubinus SP II stems. A CT scan analysis. Acta Orthopædica Belgica, 75, 346-353.
@article{6e56a5b60d83488d8d2c140b41036af1,
title = "Impact of stem-broach sizing on the cement mantle of Lubinus SP II stems. A CT scan analysis.",
abstract = "Lubinus SP II stems are cemented either line-to-line with the largest broach or one-size undersized. The purpose of this study was to compare both implantation techniques. We used 18 polymeric stem replicas cemented line-to-line and undersized in paired cadaveric femora and analyzed them with CT scan images. Cementing Lubinus stems line-to-line resulted in higher medullary canal-filling indices (28.26 ± 4.10%), thinner cement mantles (3.29 ± 0.40 mm), more cement defects (5.12 ± 1.69%) and more areas of thin cement (23.81 ± 7.13%) than undersizing (respectively : 23.61 ± 4.24%, 3.62 ± 0.43 mm, 1.48 ± 2.04%, 15.11 ± 5.93%). In both settings, over 80% of areas of thin or deficient cement were supported by cortex. Using a line-to-line technique, adequate stem alignment was achieved without distal centralizer. Undersizing the stem and using a distal centralizer reduced the incidence of distal cement defects by a factor 10. While stems cemented line-to-line might have mechanical advantages, undersizing and using distal centralizers reduced potential pathways for debris migration to the bone-cement interface.",
keywords = "hip arthroplasty, femoral stem, cement mantle, Lubinus SP2, computed tomography, cementing technique",
author = "Thierry Scheerlinck and {De Mey}, Johan and Rudi Deklerck",
year = "2009",
month = jun,
language = "English",
volume = "75",
pages = "346--353",
journal = "Acta Orthop{\ae}dica Belgica",
issn = "0001-6462",
publisher = "ARSMB-KVBMG",
}