TY - JOUR
T1 - Biomechanical assessment of a novel bone lengthening plate system - A cadaveric study
AU - Jung, Tae Gon
AU - Suh, Seung Woo
AU - Lee, Sung Jae
AU - Kim, Bongju
AU - Han, Dong Wook
AU - Yang, Jae Hyuk
N1 - Funding Information:
This research and development study of a new medical device was supported by the Ministry of Knowledge Economy Affairs of the Republic of Korea (no. 70007133 ). The authors state their gratitude for this support and that they have no conflicts of interest to report.
PY - 2013/2
Y1 - 2013/2
N2 - Background Although many types of external fixators have been developed for distraction osteogenesis, all have some drawbacks. We recently developed a novel bone lengthening plate to overcome these problems. The purpose of this study is to conduct biomechanical analyses using cadavers to assess the stability of the bone lengthening plate in relation to distraction length and femoral bone mineral density. Methods We used human cadaveric femurs (n = 18) to assess the effects of distraction length and bone mineral density on the biomechanical stability of the bone lengthening plate. After establishing control (n = 6, 0 mm lengthening) and experimental groups (n = 12, 30 mm lengthening), we measured biomechanical stability (structural stiffness, ultimate load, and displacement) under a compressive load. The experimental group was subdivided into a group with normal bone mineral density (n = 6) and a group with osteoporosis (n = 6), and the biomechanical stability of these groups was compared. Finding Structural stiffness differed significantly between the control (417.6 N/mm) and combined experimental groups (185.6 N/mm, p = 0.002). Ultimate load also differed significantly between the control (1327.8 N) and combined experimental (331.4 N, p = 0.002) groups. Bone mineral density was unrelated to structural stiffness (p = 0.204), ultimate load (0.876), or displacement (0.344). In all cases, failure of the bone lengthening plate occurred at the longitudinal connectors, such as the connecting columns between the upper and lower plates, and the lengthening shaft of the bone lengthening plate. Interpretation The biomechanical stability of the bone lengthening plate was affected by the lengthening length but not by bone mineral density. In addition, biomechanical stability during lengthening was most strongly influenced by the longitudinal connectors.
AB - Background Although many types of external fixators have been developed for distraction osteogenesis, all have some drawbacks. We recently developed a novel bone lengthening plate to overcome these problems. The purpose of this study is to conduct biomechanical analyses using cadavers to assess the stability of the bone lengthening plate in relation to distraction length and femoral bone mineral density. Methods We used human cadaveric femurs (n = 18) to assess the effects of distraction length and bone mineral density on the biomechanical stability of the bone lengthening plate. After establishing control (n = 6, 0 mm lengthening) and experimental groups (n = 12, 30 mm lengthening), we measured biomechanical stability (structural stiffness, ultimate load, and displacement) under a compressive load. The experimental group was subdivided into a group with normal bone mineral density (n = 6) and a group with osteoporosis (n = 6), and the biomechanical stability of these groups was compared. Finding Structural stiffness differed significantly between the control (417.6 N/mm) and combined experimental groups (185.6 N/mm, p = 0.002). Ultimate load also differed significantly between the control (1327.8 N) and combined experimental (331.4 N, p = 0.002) groups. Bone mineral density was unrelated to structural stiffness (p = 0.204), ultimate load (0.876), or displacement (0.344). In all cases, failure of the bone lengthening plate occurred at the longitudinal connectors, such as the connecting columns between the upper and lower plates, and the lengthening shaft of the bone lengthening plate. Interpretation The biomechanical stability of the bone lengthening plate was affected by the lengthening length but not by bone mineral density. In addition, biomechanical stability during lengthening was most strongly influenced by the longitudinal connectors.
KW - Biomechanical stability
KW - Bone lengthening plate
KW - Bone mineral density
KW - Femur
KW - Keywords
UR - http://www.scopus.com/inward/record.url?scp=84875734090&partnerID=8YFLogxK
U2 - 10.1016/j.clinbiomech.2012.11.011
DO - 10.1016/j.clinbiomech.2012.11.011
M3 - Article
C2 - 23261017
AN - SCOPUS:84875734090
SN - 0268-0033
VL - 28
SP - 232
EP - 238
JO - Clinical Biomechanics
JF - Clinical Biomechanics
IS - 2
ER -