title: Comparison of Intracranial Volume and Cephalic Index After Correction of Sagittal Synostosis With Spring-assisted Surgery or Pi-plasty.
abstract: BACKGROUND
  The aim of the current study was to determine the intracranial volume (ICV) and cephalic index (CI) in patients operated for sagittal synostosis, and to compare the outcome of 2 different surgical techniques: craniotomy combined with springs and modified pi-plasty.
  
  
  METHODS
  The authors studied all patients who had been operated for isolated sagittal synostosis and registered in the Gothenburg Craniofacial Registry until the end of 2012 and who had undergone a preoperative and/or postoperative (at 3 years of age) computed tomography examination. Sex- and age-matched controls were identified from children who had undergone computed tomography for other reasons.
  
  
  RESULTS
  Craniotomy combined with springs increased the ICV and CI from 802 ± 127 mL (mean ± SD) and 70.1 ± 4.0 to 1300 ± 158 mL and 73.1 ± 3.3, respectively. The corresponding values for controls were 796 ± 136 mL and 83.6 ± 7.3 preoperatively and 1334 ± 136 mL and 80.0 ± 4.5 at 3 years of age. Pi-plasty increased the ICV and CI from 1014 ± 115 mL and 69.7 ± 3.3 to 1286 ± 122 mL and 74.1 ± 2.6, respectively. Corresponding values for controls were 1043 ± 153 mL and 83.4 ± 7.0 preoperatively and 1362 ± 122 mL and 79.6 ± 3.9 at 3 years of age.
  
  
  CONCLUSIONS
  There was no significant difference between craniotomy combined with springs in children younger than 6 months and pi-plasty in older children regarding the efficacy of improving ICV and CI. Neither of the techniques fully normalized the head shape.
authors.affiliation: *Department of Plastic Surgery †Department of Radiation Physics, Institute for Clinical Sciences, Sahlgrenska Academy, Sahlgrenska University Hospital, Gothenburg University, Gothenburg, Sweden.
authors.forename: Sara
authors.initials: S
authors.lastname: Fischer
authors.forename: Giovanni
authors.initials: G
authors.lastname: Maltese
authors.forename: Peter
authors.initials: P
authors.lastname: Tarnow
authors.forename: Emma
authors.initials: E
authors.lastname: Wikberg
authors.forename: Peter
authors.initials: P
authors.lastname: Bernhardt
authors.forename: Lars
authors.initials: L
authors.lastname: Kölby
mesh_terms: D002508:Cephalometry / Q000379:methods*; D002675:Child, Preschool; D003398:Craniosynostoses / Q000175:diagnosis / Q000601:surgery*; D003399:Craniotomy / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011184:Postoperative Period; D012042:Registries; D014057:Tomography, X-Ray Computed