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Titanium Mesh Implant Exposure Due To Pressure Gradient Fluctuation
Nobutaka Yoshioka1, Shinsuke Tominaga2
1Department of Craniofacial Surgery and Plastic Surgery, Tominaga Hospital, Osaka, Japan.
Delayed titanium mesh implant exposure after craniotomy is linked to atmospheric pressure changes. Fluctuations create stress, damaging tissue and leading to implant exposure, particularly with expanded dura.
Area of Science:
- Neurosurgery
- Biomaterials Science
- Medical Device Engineering
Background:
- Titanium mesh implants (TMIs) are utilized in craniotomy procedures.
- Delayed implant exposure and skin thinning are known complications of TMIs.
- The underlying mechanism for TMI exposure remains unclear.
Observation:
- A retrospective review of 14 patients with delayed titanium implant exposure post-craniotomy (2009-2018).
- Exposed implants included TMIs (4), titanium mesh plates (6), and titanium fixation plates (4).
- Exposure occurred in the temporal (7) and frontal (6) regions, with a mean ulcer size of 1.95 cm².
Findings:
- Patients with TMI exposure showed expanded dura and no epidural space on CT scans.
- Conversely, titanium mesh plate or fixation plate exposure revealed epidural dead space on CT.
- The interval between craniotomy and exposure ranged from 5 to 27 years.
Implications:
- Proposed mechanism: pressure gradient between atmosphere and intracranial space causes dynamic stress.
- Tissue damage within mesh holes and adjacent areas leads to implant exposure.
- Understanding this mechanism may inform strategies to prevent TMI complications.
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