Molding Helmet Therapy for Severe Deformational Brachycephaly: Position of Eurion and Therapeutic Effect

Background: Molding helmet therapy is used routinely for moderate to severe deformational plagiocephaly. However, there have been few reports of its use for deformational brachycephaly (DB). The incidence and severity of DB are high in the Asian population, including Japanese people, but there are no reports of treatment for severe cases. The current study showed significant improvement even in severe DB with various deformities. The difference in improvement according to the morphologic classification was investigated. Methods: The study included 47 patients treated with helmet therapy for DB with a cephalic index of greater than 100%. Three-dimensional head scans were used for classification and measurement. DB was classified into four types according to the position of the eurion and the presence of deformational plagiocephaly. The therapeutic effect was determined by changes in cephalic index and cranial asymmetry. Results: Patients exhibited a mean change of 8.0% in cephalic index and 6.4 mm in cranial asymmetry. An older age at initiation was associated with less change in both cephalic index and cranial asymmetry. A significant difference in the amount of cephalic index change was observed depending on the position of the eurion when the starting age was 6 months or older (P < 0.05). Conclusions: Molding helmet therapy for severe DB results in significant morphological improvement. However, depending on the position of the eurion, the effect of treatment may be decreased if it is started too late. It is necessary to understand the difference in improvement depending on the morphology and to ensure early intervention. CLINICAL QUESTION/LEVEL OF EVIDENCE: Risk, II.