title: Pre-operative digital templating in cemented hip hemiarthroplasty for neck of femur fractures.
abstract: Pre-operative digital templating allows the surgeon to foresee any anatomical anomalies which may lead to intra-operative problems, and anticipate appropriate instruments and implants required during surgery. Although its role is well-established in successful elective total hip arthroplasty, little work has been done on its use in hip hemiarthroplasty in neck of femur fractures. We describe our initial experience of digital templating in 40 consecutive patients who have undergone cemented hip hemiarthroplasty, assessing templating accuracy between templated implant sizes to actual implant sizes. 81% of implanted heads were templated to within two head sizes, and 89% of implanted stems were templated to within two sizes. Although there was a moderately strong correlation of 0.52 between templated and actual head sizes, this correlation was not demonstrated in femoral stem sizes. Mean leg length discrepancy was -2.5mm (S.D. 8.5), and the mean difference in femoral offset between the operated and non-operated hip was -1mm (S.D. 4.4). Digital templating is a useful adjunct to the surgeon in pre-operative planning of hip hemiarthroplasty in the restoration of leg length and femoral offset. However, its accuracy is inferior to that of elective total hip arthroplasty.
authors.affiliation: Colchester General Hospital, Turner Road, Colchester, Essex, CO4 5JL, United Kingdom. Electronic address: iriskwokhy@hotmail.com.
authors.forename: Iris H Y
authors.initials: IH
authors.lastname: Kwok
authors.affiliation: Colchester General Hospital, Turner Road, Colchester, Essex, CO4 5JL, United Kingdom.
authors.forename: Scott J C
authors.initials: SJ
authors.lastname: Pallett
authors.affiliation: Colchester General Hospital, Turner Road, Colchester, Essex, CO4 5JL, United Kingdom.
authors.forename: Edward
authors.initials: E
authors.lastname: Massa
authors.affiliation: Colchester General Hospital, Turner Road, Colchester, Essex, CO4 5JL, United Kingdom.
authors.forename: Duncan
authors.initials: D
authors.lastname: Cundall-Curry
authors.affiliation: Colchester General Hospital, Turner Road, Colchester, Essex, CO4 5JL, United Kingdom.
authors.forename: Mark D
authors.initials: MD
authors.lastname: Loeffler
mesh_terms: D000077:Acetabulum / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000601:surgery; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005265:Femoral Neck Fractures / Q000000981:diagnostic imaging* / Q000601:surgery; D062785:Hemiarthroplasty / Q000379:methods; D006621:Hip Joint / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D007870:Leg Length Inequality / Q000175:diagnosis / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care; D011474:Prosthesis Design; D017755:Prosthesis Fitting; D011856:Radiographic Image Enhancement; D011859:Radiography; D015203:Reproducibility of Results; D012189:Retrospective Studies
keywords: Femoral neck; Fractures; Hemiarthroplasty; Hip; Templating