Patient-Specific Dual-Purpose Craniofacial Implants for Temporal Hollowing
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Solution Overview
Problem
Current methods for filling cranial bone voids do not adequately address soft tissue loss in the temporal region, leading to aesthetic deformities like temporal hollowing, which often require additional revision surgeries for correction.
Innovation Solution
Patient-specific dual-purpose craniofacial implants are designed using 3D modeling and alloplastic materials to fill bone voids while simultaneously augmenting the temporal area, accounting for soft tissue loss and displacement, thereby providing both bony and soft tissue reconstruction in a single procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If standard or customized alloplastic implants are used to fill bone voids, then structural soundness is achieved, but soft tissue atrophy in the temporal area is not addressed, resulting in temporal hollowing and aesthetic deformities
Solution Approach 1:
The patent combines bone void filling and soft tissue augmentation into a single dual-purpose implant. The implant has an inner surface configured to contact the dura mater and an outer surface configured to augment the temporal region, merging two separate reconstructive needs into one integrated solution that prevents temporal hollowing while providing structural support
Solution Approach 2:
The implant serves multiple functions simultaneously: it acts as both a bone void filler and a soft tissue augment. The single device addresses both the structural deficiency (bone void) and the aesthetic deficiency (soft tissue atrophy), making it a universal solution for patients requiring both types of reconstruction
2Reliability
If bone voids are filled using traditional methods, then cerebral protection is provided, but additional revision surgeries are required to correct temporal hollowing
Solution Approach 1:
The dual-purpose implant performs soft tissue augmentation in advance during the initial bone void filling surgery. By proactively addressing the soft tissue deficiency at the time of primary surgery, the implant prevents temporal hollowing before it occurs, eliminating the need for subsequent revision procedures to correct aesthetic deformities
3Ease of manufacture
If the temporalis muscle is displaced or foreshortened during craniotomy surgery, then bone void filling can be performed, but temporal hollowing and dynamic distortion during chewing occur
Solution Approach 1:
The dual-purpose implant acts as an intermediary structure that provides a new attachment site for the temporalis muscle when the original bone flap cannot be repositioned. The implant's inner surface configured to contact the dura mater serves as a mediator that allows muscle reattachment, thereby restoring mastication function while preventing temporal hollowing
Data Source
AI summary
Disclosed herein are patient-specific craniofacial implants structured for filling bone voids in the cranium as well as for simultaneously providing soft tissue reconstruction and/or augmentation for improved aesthetic symmetry and appearance. Pterional voids or defects generally result from a chromic skull deformity along with a compromised temporalis muscle or soft tissue distortion from previous surgery. When muscle atrophy occurs in the pterion, temporal hollowing generally results where there would be soft tissue but for the atrophy. The patient-specific temporal implants herein are configured to have an augmented region adjacent the temporal region of the cranium in order to account for and correct any such temporal hollowing.