PMID- 28630736
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201001
IS  - 2054-8397 (Print)
IS  - 2054-8397 (Electronic)
IS  - 2054-8397 (Linking)
VI  - 4
IP  - 2
DP  - 2017 Jul
TI  - Abnormal femoral antetorsion-a subtrochanteric deformity.
PG  - 153-158
LID - 10.1093/jhps/hnx013 [doi]
AB  - Femoral rotational malalignment is associated with pain and functional disability 
      and may be a contributing factor to hip impingement as well as to instability. In 
      general, the deformity can be addressed surgically by rotational osteotomy. 
      However, the anatomic location of the deformity is debated. The goal of the 
      present study was to narrow down the anatomic site of deformity using the lesser 
      trochanter (LT) as an additional landmark. One hundred and eight patients 
      underwent computer tomography (CT)-based rotational analysis of their lower 
      extremities. Femoral torsion (FT) and LT torsion (LTT) were measured. The 
      combined angle (CoA) between FT and LTT was calculated. Statistical evaluation 
      was done by multiple regression analysis. Ninety-seven extremities were examined 
      for FT and LTT. Average age was 41 years (SD = 16.9) with a range of 18-85 years. 
      Mean values were 20 degrees  for FT (SD = 12.2) and -16 degrees  for LTT (SD = 11.3). Mean CoA 
      was 37.2 (SD = 8.7). Statistical analysis reveals a strong linear relationship 
      between FT and LTT (y=31+0.74x) and a weaker relationship between FT and CoA 
      (y=31+0.24x). This study identifies the LT as a reliable landmark and shows a 
      strong linear relationship between the orientation of the LT and the overall 
      torsion of the femur below and above the LT with about two-thirds of torsional 
      changes occurring distal to it. These results provide a considerable indication 
      for a subtrochanteric osteotomy to address correction of femoral rotational 
      deformity at its anatomical origin. Level of Evidence: Level III, observational 
      study.
FAU - Waisbrod, Guy
AU  - Waisbrod G
AD  - Schulthess Klinik, Lengghalde 2, 8008 Zurich, Switzerland.
AD  - Clinic of Orthopaedic and Trauma Surgery, Luzerner Kantonspital, Spitalstrasse, 
      Luzern 6000, Switzerland.
AD  - Present address: Schweizer Paraplegiker Zentrum, Nottwil 6207, Switzerland.
FAU - Schiebel, Florian
AU  - Schiebel F
AD  - Clinic of Orthopaedic and Trauma Surgery, Luzerner Kantonspital, Spitalstrasse, 
      Luzern 6000, Switzerland.
FAU - Beck, Martin
AU  - Beck M
AD  - Clinic of Orthopaedic and Trauma Surgery, Luzerner Kantonspital, Spitalstrasse, 
      Luzern 6000, Switzerland.
LA  - eng
PT  - Journal Article
DEP - 20170412
PL  - England
TA  - J Hip Preserv Surg
JT  - Journal of hip preservation surgery
JID - 101643347
PMC - PMC5467415
EDAT- 2017/06/21 06:00
MHDA- 2017/06/21 06:01
PMCR- 2017/04/12
CRDT- 2017/06/21 06:00
PHST- 2016/09/26 00:00 [received]
PHST- 2017/03/16 00:00 [accepted]
PHST- 2017/06/21 06:00 [entrez]
PHST- 2017/06/21 06:00 [pubmed]
PHST- 2017/06/21 06:01 [medline]
PHST- 2017/04/12 00:00 [pmc-release]
AID - hnx013 [pii]
AID - 10.1093/jhps/hnx013 [doi]
PST - epublish
SO  - J Hip Preserv Surg. 2017 Apr 12;4(2):153-158. doi: 10.1093/jhps/hnx013. 
      eCollection 2017 Jul.