Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model
While the Lapidus procedure is a widely accepted technique for treatment of hallux valgus, the optimal fixation method to maintain joint stability remains controversial. The purpose of this study was to evaluate the biomechanical properties of new Shape Memory Alloy staples arranged in different con...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-12-01
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| Series: | Frontiers in Surgery |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fsurg.2015.00065/full |
| _version_ | 1817981942744743936 |
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| author | Nicholas Alexander Russell Gianmarco eRegazzola Amiethab eAiyer Tomohiro eNomura Matthew Henry Pelletier Mark eMyerson William R Walsh |
| author_facet | Nicholas Alexander Russell Gianmarco eRegazzola Amiethab eAiyer Tomohiro eNomura Matthew Henry Pelletier Mark eMyerson William R Walsh |
| author_sort | Nicholas Alexander Russell |
| collection | DOAJ |
| description | While the Lapidus procedure is a widely accepted technique for treatment of hallux valgus, the optimal fixation method to maintain joint stability remains controversial. The purpose of this study was to evaluate the biomechanical properties of new Shape Memory Alloy staples arranged in different configurations in a repeatable 1st Tarsometatarsal arthrodesis model. Ten sawbones models of the whole foot (n=5 per group) were reconstructed using a single dorsal staple or two staples in a delta configuration. Each construct was mechanically tested in dorsal four-point bending, medial four-point bending, dorsal three-point bending and plantar cantilever bending with the staples activated at 37°C. The peak load, stiffness and plantar gapping were determined for each test. Pressure sensors were used to measure the contact force and area of the joint footprint in each group. There was a significant (p < 0.05) increase in peak load in the two staple constructs compared to the single staple constructs for all testing modalities. Stiffness also increased significantly in all tests except dorsal four-point bending. Pressure sensor readings showed a significantly higher contact force at time zero and contact area following loading in the two staple constructs (p < 0.05). Both groups completely recovered any plantar gapping following unloading and restored their initial contact footprint. The biomechanical integrity and repeatability of the models was demonstrated with no construct failures due to hardware or model breakdown. Shape memory alloy staples provide fixation with the ability to dynamically apply and maintain compression across a simulated arthrodesis following a range of loading conditions. |
| first_indexed | 2024-04-13T23:12:53Z |
| format | Article |
| id | doaj.art-4595f3034d094533aa62717e2ed457ac |
| institution | Directory Open Access Journal |
| issn | 2296-875X |
| language | English |
| last_indexed | 2024-04-13T23:12:53Z |
| publishDate | 2015-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Surgery |
| spelling | doaj.art-4595f3034d094533aa62717e2ed457ac2022-12-22T02:25:30ZengFrontiers Media S.A.Frontiers in Surgery2296-875X2015-12-01210.3389/fsurg.2015.00065171801Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical modelNicholas Alexander Russell0Gianmarco eRegazzola1Amiethab eAiyer2Tomohiro eNomura3Matthew Henry Pelletier4Mark eMyerson5William R Walsh6UNSWUNSWMercy Medical CentreUNSWUNSWMercy Medical CentreUNSWWhile the Lapidus procedure is a widely accepted technique for treatment of hallux valgus, the optimal fixation method to maintain joint stability remains controversial. The purpose of this study was to evaluate the biomechanical properties of new Shape Memory Alloy staples arranged in different configurations in a repeatable 1st Tarsometatarsal arthrodesis model. Ten sawbones models of the whole foot (n=5 per group) were reconstructed using a single dorsal staple or two staples in a delta configuration. Each construct was mechanically tested in dorsal four-point bending, medial four-point bending, dorsal three-point bending and plantar cantilever bending with the staples activated at 37°C. The peak load, stiffness and plantar gapping were determined for each test. Pressure sensors were used to measure the contact force and area of the joint footprint in each group. There was a significant (p < 0.05) increase in peak load in the two staple constructs compared to the single staple constructs for all testing modalities. Stiffness also increased significantly in all tests except dorsal four-point bending. Pressure sensor readings showed a significantly higher contact force at time zero and contact area following loading in the two staple constructs (p < 0.05). Both groups completely recovered any plantar gapping following unloading and restored their initial contact footprint. The biomechanical integrity and repeatability of the models was demonstrated with no construct failures due to hardware or model breakdown. Shape memory alloy staples provide fixation with the ability to dynamically apply and maintain compression across a simulated arthrodesis following a range of loading conditions.http://journal.frontiersin.org/Journal/10.3389/fsurg.2015.00065/fullOsteotomyBiomechanicalNitinolShape memoryStapleLapidus |
| spellingShingle | Nicholas Alexander Russell Gianmarco eRegazzola Amiethab eAiyer Tomohiro eNomura Matthew Henry Pelletier Mark eMyerson William R Walsh Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model Frontiers in Surgery Osteotomy Biomechanical Nitinol Shape memory Staple Lapidus |
| title | Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model |
| title_full | Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model |
| title_fullStr | Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model |
| title_full_unstemmed | Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model |
| title_short | Evaluation of Nitinol staples for the Lapidus arthrodesis in a reproducible biomechanical model |
| title_sort | evaluation of nitinol staples for the lapidus arthrodesis in a reproducible biomechanical model |
| topic | Osteotomy Biomechanical Nitinol Shape memory Staple Lapidus |
| url | http://journal.frontiersin.org/Journal/10.3389/fsurg.2015.00065/full |
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