The Influence of Trabecular Microstructure on Mechanical Properties and the Pullout Strength of Suture Anchors

2010 ◽  
Author(s):  
Mariya Poukalova ◽  
Christopher M. Yakacki ◽  
Robert E. Guldberg ◽  
Angela Lin ◽  
Ken Gall
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Suture Anchor ◽  
Common Type ◽  
Tissue Fixation ◽  
Suture Anchors ◽  
Pullout Strength ◽  
Mineral Density ◽  
Trabecular Microstructure ◽  
Type Of Surgery

Suture anchors provide soft-tissue fixation, often tendons and ligaments, to bone. The most common type of surgery in which suture anchors are used is in rotator cuff repairs, where the anchor is implanted into the humerus to create a point of fixation for the supraspinatus.[1–2] Pullout strength, or the force necessary to pull the anchor from the bone, has been previously used as a metric to compare suture anchor performance. In investigating suture anchor performance, it has been suggested that pullout strength is positively correlated to bone mineral density (BMD).[2]

Does Greater Trochanter Decortication Affect Suture Anchor Pullout Strength in Abductor Tendon Repairs? A Biomechanical Study

2018 ◽  
Vol 46 (7) ◽  
pp. 1668-1673 ◽  
Author(s):  
Jill G. Putnam ◽  
Anikar Chhabra ◽  
Paulo Castañeda ◽  
J. Brock Walker ◽  
Collin C. Barber ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Density ◽  
Suture Anchor ◽  
Tendon Repair ◽  
Suture Anchors ◽  
Pullout Strength ◽  
Mineral Density ◽  
Greater Trochanter ◽  
Load To Failure ◽  
Lateral Facet

Background: Greater trochanter decortication is frequently performed at the time of abductor tendon repair to theoretically increase healing potential. No previous studies have determined the effect that greater trochanter decortication has on the pullout strength of suture anchors. Hypothesis/Purpose: The purpose of this study is to determine whether greater trochanter decortication and bone mineral density affect suture anchor pullout strength in abductor tendon repair. The authors hypothesize that both will have a significant detrimental effect on suture anchor pullout strength. Study Design: Controlled laboratory study. Methods: Nineteen cadaveric proximal femurs with accompanying demographic data and computed tomography scans were skeletonized to expose the greater trochanter. Bone density measurements were acquired by converting Hounsfield units to T-score, based on a standardized volumetric sample in the intertrochanteric region of the femur. The gluteus medius insertion site on the lateral facet of the greater trochanter was evenly divided into 2 regions, anterior-distal and posterior-proximal, and each region was randomly assigned to receive either no decortication or 2 mm of bone decortication. A single biocomposite anchor was implanted in each region and initially tested with cyclic loading for 10 cycles at 0-50 N, 0-100 N, 0-150 N, and 0-200 N, followed by load to failure (LTF) tested at 1 mm/s. For each trial, the number of cycles endured, LTF, mechanism of failure, and stiffness were recorded. Results: Greater trochanters with no decortication and 2 mm of decortication survived a mean ± SD 35.1 ± 6.4 and 28.5 ± 10.6 cycles, respectively ( P < .01). Load to failure for nondecorticated specimens was 206.7 ± 75.0 N versus 152.3 ± 60.2 N for decorticated specimens ( P < .001). In a multivariate analysis, decortication and bone density were determinants in LTF ( P < .05). Conclusion: Decortication and decreased bone mineral density significantly decreased the pullout strength of suture anchors in the lateral facet of the greater trochanter. Clinical Relevance: Bone density should be considered when determining whether to perform greater trochanter decortication in abductor tendon repairs.

The Effect of Trabecular Microstructure and Mechanical Properties on the Pullout Strength of Suture Anchors

2009 ◽  
Author(s):  
Christopher M. Yakacki ◽  
Mariya Poukalova ◽  
Robert E. Guldberg ◽  
Angela Lin ◽  
Ken Gall
Keyword(s):  
Mechanical Properties ◽  
Rotator Cuff ◽  
Soft Tissues ◽  
Flexor Tendon ◽  
Suture Anchors ◽  
Pullout Strength ◽  
Bone Anchor ◽  
Trabecular Microstructure ◽  
The Us ◽  
Tendon Ruptures

Suture anchors are a type of bone anchor designed to attach soft tissues, such as tendons and ligaments, to bone. Suture anchors are commonly used for soft tissue repairs including rotator cuff repairs, bicep tenodesis, flexor tendon repairs, and patellar tendon ruptures among others. In 2007, over 1 million suture anchors were used in 460,000 shoulder repairs in the US alone[1].

scholarly journals Jumping exercise preserves bone mineral density and mechanical properties in osteopenic ovariectomized rats even following established osteopenia

2017 ◽  
Vol 28 (4) ◽  
pp. 1461-1471 ◽  
Author(s):  
R . Okubo ◽  
L. S. Sanada ◽  
V. A. Castania ◽  
M. J. Q. Louzada ◽  
F. J. A. de Paula ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Bone Mineral ◽  
Ovariectomized Rats ◽  
Mineral Density ◽  
Jumping Exercise

scholarly journals Heterogeneity of Bone Mineral Density and Fatigue Failure of Human Vertebrae

2012 ◽  
Author(s):  
Yener N. Yeni ◽  
Laila M. Poisson ◽  
Michael J. Flynn
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Vertebral Fracture ◽  
Bone Mineral ◽  
Vertebral Fractures ◽  
Important Determinant ◽  
Fatigue Properties ◽  
Static Properties ◽  
Mineral Density ◽  
Significant Interest

Bone qualities that are measurable via clinically available modalities and that can explain fracture risk beyond what is explainable by bone mineral density (BMD) are of significant interest. Evidence from literature suggests that the heterogeneity of BMD within a vertebra, in addition to the average BMD, may be an important determinant of the mechanical properties of a vertebra 1–3 and risk of a clinical vertebral fracture 4. Much of the experimental evidence comes from tests, in which vertebrae are monotonically loaded and relates BMD heterogeneity to the quasi-static properties of a vertebra 1, 3. The appearance of clinical vertebral fractures is in the form of progressive deformities indicating that fatigue processes are involved. However, the relationships between BMD heterogeneity and fatigue properties of a vertebra are not well-understood.

Newly Formed Bone around Implanted New Titanium Alloy: Ti-15%Zr-4%Nb-4%Ta

2007 ◽  
Vol 361-363 ◽  
pp. 661-664
Author(s):  
Hiroshi Nakada ◽  
Yasuko Numata ◽  
Taketoshi Suwa ◽  
Y. Okazaki ◽  
Racquel Z. LeGeros ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Titanium Alloy ◽  
Surface Treatment ◽  
Bone Mineral ◽  
Ti Alloy ◽  
Micro Ct ◽  
Mineral Density ◽  
Biological Safety ◽  
Biological Performance

We have developed a new Ti alloy, Ti-15%Zr-4%Nb-4%Ta alloy (Ti-15-4-4) that showed higher biological safety and mechanical properties than the currently used Ti-6%Al-4%V alloy. The purpose of this study is to determine the biological performance of the new alloy. Ti-15-4-4 implants (machined or blasted) were placed in surgically created defects in rabbit femurs. The rabbits were sacrificed after 4, 8, 16, 24 and 48 weeks. Bone mineral density (BMD) and area of newly formed bone around the implants were measured using micro-CT. Results showed that the Ti-15-4-4 alloy is biocompatible and forms new bone around the Ti-15-4-4 implant, regardless of the surface treatment. The BMD and area of newly formed bone around the blasted implant surfaces were significantly greater than those around the machined surfaces. These results indicate that the new Ti-15-4-4 alloy has a potential for use as implants and has the advantage of improved mechanical properties described in earlier studies.

Trabecular Bone Structures in the Edentulous Diastema of Osteoporotic Sheep

2008 ◽  
Vol 87 (9) ◽  
pp. 866-870 ◽  
Author(s):  
G. Dvorak ◽  
R. Gruber ◽  
C.D. Huber ◽  
J. Goldhahn ◽  
G. Zanoni ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Trabecular Bone ◽  
Bone Mineral ◽  
Structural Parameters ◽  
Mineral Density ◽  
Trabecular Bone Mineral Density ◽  
Trabecular Microstructure ◽  
Embryonic Origin ◽  
Bone Structures ◽  
Maxillary Region

The edentulous ovine diastema represents a suitable region for implantological research. Due to distinctive embryonic origin and mechanical loading, the edentulous diastema may respond differently to osteoporosis than tooth-bearing areas. To test this assumption, we subjected geriatric sheep to ovariectomy, calcium-/vitamin-D-restricted diet, and methylprednisolone administration. Adult control sheep remained untreated. Structural parameters and bone mineral density were determined by microcomputed tomography and conventional computed tomography, respectively. We report that the trabecular microstructure in the diastema was preserved from catabolic changes. In contrast, the premolar maxillary region of osteoporotic sheep had diminished trabecular bone mineral density, with the corresponding structural deteriorations. These results suggest that maxillary trabecular bone of the edentulous diastema does not respond to catabolic changes which occur in the tooth-bearing area in osteoporosis. Our findings imply that regional anatomic domains must be considered in the planning of pre-clinical studies, taking osteoporotic changes into account.

scholarly journals The effect of the trabecular microstructure on the pullout strength of suture anchors

2010 ◽  
Vol 43 (10) ◽  
pp. 1953-1959 ◽  
Author(s):  
Christopher M. Yakacki ◽  
Mariya Poukalova ◽  
Robert E. Guldberg ◽  
Angela Lin ◽  
Minn Saing ◽  
...  
Keyword(s):  
Suture Anchors ◽  
Pullout Strength ◽  
Trabecular Microstructure

scholarly journals Relationship Between Mechanical Properties and Bone Mineral Density of Human Femoral Bone Retrieved from Patients with Osteoarthritis

2012 ◽  
Vol 6 (1) ◽  
pp. 458-463 ◽  
Author(s):  
Yvonne Haba ◽  
Tobias Lindner ◽  
Andreas Fritsche ◽  
Ann-Kristin Schiebenhöfer ◽  
Robert Souffrant ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Bone Density ◽  
Bone Mineral ◽  
Mechanical Load ◽  
Load Capacity ◽  
Quantitative Computed Tomography ◽  
Hip Osteoarthritis ◽  
Femoral Bone ◽  
Mineral Density

The objective of this study was to analyse retrieved human femoral bone samples using three different test methods, to elucidate the relationship between bone mineral density and mechanical properties. Human femoral heads were retrieved from 22 donors undergoing primary total hip replacement due to hip osteoarthritis and stored for a maximum of 24 hours postoperatively at + 6 °C to 8 °C. Analysis revealed an average structural modulus of 232±130 N/mm2 and ultimate compression strength of 6.1±3.3 N/mm2 with high standard deviations. Bone mineral densities of 385±133 mg/cm2 and 353±172 mg/cm3 were measured using thedual energy X-ray absorptiometry (DXA) and quantitative computed tomography (QCT), respectively. Ashing resulted in a bone mineral density of 323±97 mg/cm3. In particular, significant linear correlations were found between DXA and ashing with r = 0.89 (p < 0.01, n = 22) and between structural modulus and ashing with r = 0.76 (p < 0.01, n = 22). Thus, we demonstrated a significant relationship between mechanical properties and bone density. The correlations found can help to determine the mechanical load capacity of individual patients undergoing surgical treatments by means of noninvasive bone density measurements.

scholarly journals Bone Mineral Densities and Mechanical Properties of Retrieved Femoral Bone Samples in relation to Bone Mineral Densities Measured in the Respective Patients

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Yvonne Haba ◽  
Ralf Skripitz ◽  
Tobias Lindner ◽  
Martin Köckerling ◽  
Andreas Fritsche ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Femoral Head ◽  
Bone Mineral ◽  
Hip Replacement ◽  
Dual Energy ◽  
Femoral Bone ◽  
Mineral Density ◽  
X Ray

The bone mineral density (BMD) of retrieved cancellous bone samples is compared to the BMD measuredin vivoin the respective osteoarthritic patients. Furthermore, mechanical properties, in terms of structural modulus (Es) and ultimate compression strength (σmax) of the bone samples, are correlated to BMD data. Human femoral heads were retrieved from 13 osteoarthritic patients undergoing total hip replacement. Subsequently, the BMD of each bone sample was analysed using dual energy X-ray absorptiometry (DXA) as well as ashing. Furthermore, BMDs of the proximal femur were analysed preoperatively in the respective patients by DXA. BMDs of the femoral neck and head showed a wide variation, from1016±166 mg/cm2to1376±404 mg/cm2. BMDs of the bone samples measured by DXA and ashing yielded values of315±199 mg/cm2and347±113 mg/cm3, respectively.Esandσmaxamounted to232±151 N/mm2and6.4±3.7 N/mm2. Significant correlation was found between the DXA and ashing data on the bone samples and the DXA data from the patients at the femoral head (r=0.85and 0.79, resp.).Escorrelated significantly with BMD in the patients and bone samples as well as the ashing data (r=0.79,r=0.82, andr=0.8, resp.).

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