title: Effect of Body Mass Index on Digital Templating for Total Hip Arthroplasty.
abstract: Digital templating is becoming more prevalent in orthopedics. Recent investigations report high accuracy using digital templating in total hip arthroplasty (THA); however, the effect of body mass index (BMI) on templating accuracy is not well described.
  
  
  
  Digital radiographs of 603 consecutive patients (645 hips) undergoing primary THA by a single surgeon were digitally templated using OrthoView (Jacksonville, FL). A 25-mm metallic sphere was used as a calibration marker. Preoperative digital hip templates were compared with the final implant size. Hips were stratified into groups based on BMI: BMI <30 (315), BMI 30-35 (132), BMI 35-40 (97), and BMI >40 (101).
  
  
  
  Accuracy between templating and final size did not vary by BMI for acetabular or femoral components. Digital templating was within 2 sizes of the final acetabular and femoral implants in 99.1% and 97.1% of cases, respectively.
  
  
  
  Digital templating is an effective means of predicting the final size of THA components. BMI does not appear to play a major role in altering THA digital templating accuracy.
authors: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois.
authors: Robert A
authors: RA
authors: Sershon
authors: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois.
authors: Alejandro
authors: A
authors: Diaz
authors: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois.
authors: Daniel D
authors: DD
authors: Bohl
authors: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois.
authors: Brett R
authors: BR
authors: Levine
mesh_terms: D000077:Acetabulum / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip; D015992:Body Mass Index; D002138:Calibration; D005269:Femur / Q000601:surgery; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D011300:Preoperative Care; D011859:Radiography / Q000592:standards* / Q000706:statistics & numerical data; D012189:Retrospective Studies
keywords: body mass index; digital templating; obesity; total hip arthroplasty