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Improving MiniHip femoral prosthesis positioning using a cross‐laser projection system in total hip arthroplasty by an anterolateral supine approach
Author(s) -
Fujii Hideki,
Hayama Tetsuo,
Abe Toshiomi,
Takahashi Motoi,
Matsushita Yohei,
Sato Ryuichi,
Otani Takuya,
Saito Mitsuru
Publication year - 2021
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.2214
Subject(s) - supine position , medicine , total hip arthroplasty , prosthesis , surgery , tilt (camera) , valgus , femoral neck , arthroplasty , mathematics , geometry , osteoporosis
Background The authors developed a cross‐laser projection system (CLP) to place a femoral neck‐sparing short stem using the minimally invasive anterolateral supine approach in total hip arthroplasty. This study aimed to verify the utility of CLP. Methods Thirty joints were assessed with the MiniHip (Corin). The authors compared femoral component implantation with a patient‐specific femoral osteotomy guide (PSG) for the femoral neck‐cut (PSG group), with the CLP attached to the rasp handle to irradiate the cross‐laser to the target of PSG (CLP group), and without PSG or CLP (control group). Results In the CLP group, the positional deviation of anteversion, anterior/posterior tilt and varus/valgus placement of the stem postoperatively were 1.8° ± 0.2°, 2.0° ± 2.0° and 2.0° ± 0.1°, respectively. The positional deviation of anteversion ( p < 0.001) and anterior/posterior tilt ( p = 0.036) were significantly smaller than those in the other groups. Conclusions CLP improves the accuracy of MiniHip femoral prosthesis placement.