Association between plate location and plate removal following facial fracture repair.

Summary Background Titanium-based plates used to repair facial fractures are sometimes removed despite their high biocompatibility. Local discomfort can lead to plate removal surgery. Local discomfort may differ according to patient characteristics, tissue properties and plate thickness; however, little is known about the relationship between these conditions and plate removal. Methods We performed a hospital-based, retrospective cohort study of patients who underwent internal fixation for facial or frontal bone fracture. To identify factors associated with plate removal, we used multivariate logistic regression models. Results Data from 138 patients were analysed. All plates were made of commercially pure titanium, and all screws were made of titanium, 6% aluminium and 4% vanadium alloy. Plate thickness was 1.2 mm or 0.6 mm. Among plate locations, the frontozygomatic suture showed the highest percentage of complications (84%, 86 of 102 patients). The majority consisted of palpability and visibility. In patients who underwent plate removal ( n  = 96), all plates and screws were removed successfully. All plate-related complications were resolved after plate removal. No complications were introduced by plate removal. Plates 1.2 mm in thickness on the frontozygomatic suture had a relative risk of complications 2.48 times (95% confidence interval, 1.13–5.43) that of plates 0.6 mm in thickness. By multivariate analysis, the presence of plates on the frontozygomatic suture was a significant and independent risk factor for removal. Patients with plates on the frontozygomatic suture had a risk of plate removal 3.95 times (95% confidence interval, 1.55–10.07; P Conclusion Plates on the frontozygomatic suture have a high rate of complications. Thick plates increase these risks. Patients with plates on the frontozygomatic suture are more likely to undergo plate removal surgery than patients without plates on the frontozygomatic suture.