PURPOSE: Limited data exist for the reconstructive potential of short bone-preserving stems in THA using a minimal invasive posterolateral approach. Our study aim was to assess the effect of stem design on the reconstruction of hip offset and leg length in MIS posterolateral THA. METHODS: This retrospective consecutive single-surgeon study compares hip offset and leg length, as well as acetabular component positioning (cup anteversion; inclination) of 129 THAs with a cementless standard-length stem (Synergy®) and 143 THAs with a cementless short bone-preserving stem (Trilock®). RESULTS: In reference to the contralateral side, the mean difference in hip offset was 0.9 mm (p = 0.067) for the standard stem and 0.1 mm (p = 0.793) for the short stem, respectively. Leg-length discrepancy was 0.7 mm (Synergy®) and 0.9 mm (Trilock®), respectively. A total of 233 (86 %) acetabular components fell within the target zone for anteversion and inclination. CONCLUSION: Accurate component positioning in MIS posterolateral approach THA is possible and is not influenced by the type of stem.
PURPOSE: Limited data exist for the reconstructive potential of short bone-preserving stems in THA using a minimal invasive posterolateral approach. Our study aim was to assess the effect of stem design on the reconstruction of hip offset and leg length in MIS posterolateral THA. METHODS: This retrospective consecutive single-surgeon study compares hip offset and leg length, as well as acetabular component positioning (cup anteversion; inclination) of 129 THAs with a cementless standard-length stem (Synergy®) and 143 THAs with a cementless short bone-preserving stem (Trilock®). RESULTS: In reference to the contralateral side, the mean difference in hip offset was 0.9 mm (p = 0.067) for the standard stem and 0.1 mm (p = 0.793) for the short stem, respectively. Leg-length discrepancy was 0.7 mm (Synergy®) and 0.9 mm (Trilock®), respectively. A total of 233 (86 %) acetabular components fell within the target zone for anteversion and inclination. CONCLUSION: Accurate component positioning in MIS posterolateral approach THA is possible and is not influenced by the type of stem.
Authors: Daniel J Berry; Richard A Berger; John J Callaghan; Lawrence D Dorr; Paul J Duwelius; Mark A Hartzband; Jay R Lieberman; Dana C Mears Journal: J Bone Joint Surg Am Date: 2003-11 Impact factor: 5.284
Authors: Christian Merle; George Grammatopoulos; Wenzel Waldstein; Elise Pegg; Hemant Pandit; Peter R Aldinger; Harinderjit S Gill; David W Murray Journal: J Bone Joint Surg Am Date: 2013-11-20 Impact factor: 5.284
Authors: Wenzel Waldstein; Ulrich Koller; Bernhard Springer; Paul Kolbitsch; Wolfram Brodner; Reinhard Windhager; Richard Lass Journal: Bone Joint Res Date: 2020-05-16 Impact factor: 5.853