TY - JOUR
T1 - Biomechanical strength of reconstruction plates when used for medial support of Med-El cochlear implants
T2 - Implications for diagnostic MRI
AU - Poetker, David M.
AU - Wackym, P. Ashley
AU - Yoganandan, Narayan
AU - Runge-Samuelson, Christina L.
AU - Firszt, Jill B.
AU - Pintar, Frank A.
PY - 2006/3/1
Y1 - 2006/3/1
N2 - Purpose: It is hypothesized that a mesh reconstruction plate designed to fit a cochlear implant (CI) internal device will provide immediate structural support to the site of the implant and that this strength far exceeds the forces induced by a 1.5-tesla MRI. Procedures: Human calvarial specimens were drilled and plated with reconstruction mesh. Force was applied until failure was reached. Results: Mean maximum force, mean force to first failure and mean displacement measures for group 1 (resorbable mesh, n = 10) were 302.9 N, 283.0 N and 3.05 mm, respectively. The mean maximum force for group 2 (0.4-mm titanium mesh, n = 10) and group 3 (0.6-mm titanium mesh, n = 8), were 121.3 and 234.0 N, respectively. Mean force of first failure was 92.0 N for group 2 and 164.8 N for group 3. Conclusions: The force required for failure of the mesh is significantly greater than the 0.17 N exerted on a CI magnet by a 1.5-tesla MRI scan.
AB - Purpose: It is hypothesized that a mesh reconstruction plate designed to fit a cochlear implant (CI) internal device will provide immediate structural support to the site of the implant and that this strength far exceeds the forces induced by a 1.5-tesla MRI. Procedures: Human calvarial specimens were drilled and plated with reconstruction mesh. Force was applied until failure was reached. Results: Mean maximum force, mean force to first failure and mean displacement measures for group 1 (resorbable mesh, n = 10) were 302.9 N, 283.0 N and 3.05 mm, respectively. The mean maximum force for group 2 (0.4-mm titanium mesh, n = 10) and group 3 (0.6-mm titanium mesh, n = 8), were 121.3 and 234.0 N, respectively. Mean force of first failure was 92.0 N for group 2 and 164.8 N for group 3. Conclusions: The force required for failure of the mesh is significantly greater than the 0.17 N exerted on a CI magnet by a 1.5-tesla MRI scan.
KW - Cochlear implant
KW - Resorbable mesh reconstruction plate
KW - Titanium mesh reconstruction plate
UR - http://www.scopus.com/inward/record.url?scp=33644928452&partnerID=8YFLogxK
U2 - 10.1159/000091118
DO - 10.1159/000091118
M3 - Article
C2 - 16432305
AN - SCOPUS:33644928452
SN - 0301-1569
VL - 68
SP - 77
EP - 82
JO - ORL
JF - ORL
IS - 2
ER -