Int J Med Robot - Validation of the femoral component placement during hip resurfacing: a comparison between the conventional jig, patient-specific template, and CT-based navigation.

Tópicos

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Resumo

CKGROUND: Appropriate insertion of a femoral guidewire is essential for hip resurfacing. A simulation study was planned using synthetic femoral bone models and the accuracy and precision of femoral guidewire alignment and insertion point were compared between conventional jigs, patient-specific templates, and computed tomography (CT) based navigation techniques.METHODS: Anteversion, stem-shaft angle, and the three-dimensional insertion point were measured postoperative with CT. Errors between planned and postoperative measurement and precision were evaluated.RESULTS: There were no statistically significant differences in error for anteversion or insertion point, although the mechanical jig showed greater error in the stem-shaft angle than the others. Patient-specific template and CT-based navigation showed good precision with high intraclass correlation (ICC) (template, 0.908 to 1.000; navigation, 0.929 to 0.995) and small root mean square error (RMSE) (0.954 to 2.969; 1.468 to 3.213). The mechanical jig group performance was inferior to the others.CONCLUSIONS: Patient-specific templates and CT-based navigation had good accuracy and precision. The mechanical jig technique was inferior to the others.

Resumo Limpo

ckground appropri insert femor guidewir essenti hip resurfac simul studi plan use synthet femor bone model accuraci precis femor guidewir align insert point compar convent jig patientspecif templat comput tomographi ct base navig techniquesmethod antevers stemshaft angl threedimension insert point measur postop ct error plan postop measur precis evaluatedresult statist signific differ error antevers insert point although mechan jig show greater error stemshaft angl other patientspecif templat ctbase navig show good precis high intraclass correl icc templat navig small root mean squar error rmse mechan jig group perform inferior othersconclus patientspecif templat ctbase navig good accuraci precis mechan jig techniqu inferior other

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