Trimming of Absorbable Plates and Screws through Smoothing by Multiple Sonic Activation Procedures Can Increase Local Tissue Reactions in Children with Cranial Fixations.

OBJECTIVE: The aim of this paper was to investigate the local reactions due to the melting of absorbable plates and screws after trimming through smoothing by multiple sonic activation procedures (MSAP). BACKGROUND: Drilling or smoothing by MSAP is performed for the trimming of the absorbable plates and screws for cranial fixation in children. Compared to drilling, smoothing by MSAP is suspected to more commonly cause local tissue reactions; thus, the issue was examined herein. METHODS: For 90 children with smoothing by MSAP and 83 children with drilling procedures who underwent cranial fixation using absorbable plates and screws, the type, time of onset, and incidence of the local reactions were investigated. RESULTS: Swelling was the most common reaction, followed by inflammatory reactions with itching, heating, skin-penetrating drainage, and pus formation. The mean time of onset of the local reaction was 10.0 ± 2.3 months after surgery. Local reactions occurred in 30% of the children in the group with smoothing by MSAP, and in 7.2% of the children in the group with drilling, showing a statistically significant difference between the two groups (p < 0.001). CONCLUSION: It was concluded that drilling rather than smoothing by MSAP to change the shapes of the absorbable plates and screws in cranial fixation can reduce the local reactions.

Correlation of Neonatal Birth-Associated Greenstick Skull Fractures with Perinatal Factors and Long-Term Outcome: Children with a Greater Number of Greenstick Skull Fractures Showed Poor Results in Terms of Long-Term Neurodevelopment.

OBJECTIVE: Skull fractures caused by birth injury are mainly compression and linear fractures, but the incidence is known to be rare. It has been recently suggested, however, that greenstick fractures (GSFs) are more common than compression or linear fractures that are detected through 3-dimensional reconstructed computed tomography. Therefore, this study was conducted to determine the correlation of GSF with perinatal factors, the accompanying head injury factors, and the long-term outcomes in neonates. METHODS: A retrospective study was conducted on correlations between GSF and perinatal and head injury factors for 295 neonates. In 160 neonates, the correlation with long-term outcome was investigated. RESULTS: In 295 neonates, 47 cases had 3 or fewer GSFs, 66 cases had 4-6, 82 cases had 7-9, and 100 cases had 10 or more. The number of GSFs was significantly associated with gestational age and mode of delivery among the perinatal factors, with brain swelling and cephalohematoma among the head injury factors. It was also associated with long-term outcomes. The cut-off value of the number of GSFs for a poor outcome by the area under the receiver operating characteristic curve was 6 or greater. CONCLUSIONS: It was concluded that GSF most commonly occurs as a birth-related skull fracture and that birth-related GSF is associated with perinatal factors, birth-related head injuries, and deterioration of long-term development. Therefore, efforts should be made to prevent GSF at birth.