Investigating the cause of late deformity following fronto-orbital remodelling for metopic synostosis using 3D CT imaging
| Autor: | David Dunaway, Naiara Rodriguez-Florez, Noor Ul Owase Jeelani, Sylvia Schievano, Richard Hayward, Aran Florez-Tapia |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Bone thickness
Adolescent Temporal Muscle Temporalis muscle Temporal muscle Craniosynostoses 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Deformity Humans Metopic synostosis Medicine Child business.industry Skull Infant Soft tissue 030206 dentistry Anatomy Plastic Surgery Procedures medicine.anatomical_structure Otorhinolaryngology Child Preschool 030220 oncology & carcinogenesis Frontal Bone Surgery Bone Remodeling Oral Surgery medicine.symptom Ct imaging Tomography X-Ray Computed business |
| Zdroj: | Journal of Cranio-Maxillofacial Surgery. 47:170-178 |
| ISSN: | 1010-5182 |
| Popis: | Purpose Late deformity/indentation is well-recognised following fronto-orbital remodelling (FOR) for metopic synostosis. We hypothesise that if damage to temporalis muscle were a contributor, the thickness of soft tissue and bone in the affected area would be reduced. Materials and methods Soft tissues and bone were separately segmented and reconstructed three-dimensionally from computed tomograms of 8 patients 1.5–18 years post-FOR performed at 16 ± 2 months for metopic synostosis and from 8 age-matched controls. Soft tissue (taken as proxy for temporalis muscle) and bone thickness overall and in the indented areas were computed. Results Post-FOR, three-dimensional soft tissue thickness maps demonstrated temporalis extending upwards but falling short of the indented area. Overall skull thickness increased with age post-FOR (logarithmic fit R2 = 0.71) and for controls (R2 = 0.90). Although immediately post-FOR the future indented area had a thickness of 98% of control, it decreased linearly to 64% 16 years later (Pearson's r = 0.84). Conclusion These findings suggest that late post-FOR deformity/indentation is enhanced by limited upward extension (or retraction downwards) of temporalis muscle, while bone thickness in the affected area gradually decreases. This supports the hypothesis that aberrant re-attachment of the temporalis muscle makes a material contribution to late deformity following FOR for metopic synostosis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect