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Book: The nonsurgical treatment of fractures in contemporary orthopedics

Sarmiento, Augusto / Latta, Loren L.

2011

Author's details	Augusto Sarmiento ; Loren L. Latta
Language	English
Size	XII, 411 S. : zahlr. Ill., graph. Darst.
Publisher	Jaypee
Publishing place	New Delhi
Publishing country	India
Document type	Book
HBZ-ID	HT016900440
ISBN	978-0-07-175921-2 ; 0-07-175921-2
Database	Catalogue ZB MED Medicine, Health

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2011 A 2795	order for loan	Magazin

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Book: Functional fracture bracing

Sarmiento, Augusto / Latta, Loren L.

a manual

2002

Author's details	Augusto Sarmiento ; Loren L. Latta
Keywords	Braces ; Humeral Fractures / therapy ; Fractures / therapy ; Tibial Fractures / therapy ; Ulna Fractures / therapy
Language	English
Size	XII, 177 S. : zahlr. Ill.
Publisher	Lippincott Williams & Wilkins
Publishing place	Philadelphia, Pa
Publishing country	United States
Document type	Book
HBZ-ID	HT013370204
ISBN	0-7817-3729-X ; 978-0-7817-3729-6
Database	Catalogue ZB MED Medicine, Health

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2002 A 2905	order for loan	Magazin

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Book: Orthopädische Technik

Latta, Loren L. / Stoltze, Klaus-Dieter / Hohmann, Dietrich

18 Tabellen

2005

Author's details	hrsg. von Dietrich Hohmann ... Mit Beitr. von Loren L. Latta und Klaus-Dieter Stoltze
Keywords	Orthese
Subject	Orthopädisches Hilfsmittel
Language	German
Size	VIII, 567 S. : Ill., graph. Darst.
Edition	9., überarb. und neu gestaltete Aufl.
Publisher	Thieme
Publishing place	Stuttgart u.a.
Publishing country	Germany
Document type	Book
HBZ-ID	HT013895648
ISBN	3-13-135929-3 ; 978-3-13-135929-2
Database	Catalogue ZB MED Medicine, Health

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2004 A 4847	order for loan	Magazin
2004 A 8768	order for loan	Magazin

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Article ; Online: Posterior atlantoaxial fixation of osteoporotic odontoid fracture: biomechanical analysis of the Magerl versus harms techniques in a cadaver model.

Mike-Mayer, Austin / Lam, Kendrick / Morris, Randal P / Barghouthi, Abeer Al / Travascio, Francesco / Latta, Loren L / Lindsey, Ronald W

The spine journal : official journal of the North American Spine Society

2024

Abstract: Background context: Odontoid fractures are among the most common cervical spine fractures in the elderly and are associated with increased morbidity and mortality. Clinical evidence suggests improved survival and quality of life after operative ... ...

Abstract	Background context: Odontoid fractures are among the most common cervical spine fractures in the elderly and are associated with increased morbidity and mortality. Clinical evidence suggests improved survival and quality of life after operative intervention compared to nonoperative treatment. Purpose: This study seeks to examine the stability of an osteoporotic Type II odontoid fracture following posterior atlantoaxial fixation with either the Magerl transarticular fixation technique or the Harms C1 lateral mass screws C2 pedicle screw rod fixation. Study design: Biomechanical cadaveric study. Methods: Eighteen cadaveric specimens extending from the cephalus to C7 were used in this study. Reflective marker arrays were attached to C1 and C2 and a single marker on the dens to measure movement of each during loading with C2-C3 and occiput-C1 being allowed to move freely. A biomechanical testing protocol imparted moments in flexion-extension, axial rotation, and lateral bending while a motion capture system recorded the motions of C1, C2, and the dens. The spines were instrumented with either the Harms fixation (n=9) or Magerl fixation (n=9) techniques, and a simulated Type II odontoid fracture was created. Motions of each instrumented spine were recorded for all moments, and then again after the instrumentation was removed to model the injured, non-instrumented state. Results: Both Harms and Magerl posterior C1-C2 fixation allowed for C1, C2, and the dens to move as a relative unit. Without fixation the dens motion was coupled with C1. No significant differences were found in X, Y, Z translation motion of the dens, C1 or C2 during neutral zone motions between the Magerl and Harms fixation techniques. There were no significant differences found in Euler angle motion between the two techniques in either flexion-extension, axial rotation, or lateral bending motion. Conclusions: Our findings suggest that both Harms and Magerl fixation can significantly reduce dens motion in Type II odontoid fractures in an osteoporotic cadaveric bone model. Clinical significance: Both Harms and Magerl posterior atlantoaxial fixation techniques allowed for C1, C2, and the dens to move as a relative unit following odontoid fracture, establishing more anatomic stability to the upper cervical spine.
Language	English
Publishing date	2024-04-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	2037072-6
ISSN	1878-1632 ; 1529-9430
ISSN (online)	1878-1632
ISSN	1529-9430
DOI	10.1016/j.spinee.2024.04.017
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Book: Functional fracture bracing

Sarmiento, Augusto / Latta, Loren L.

tibia, humerus, and ulna

1995

Author's details	A. Sarmiento ; L. L. Latta
Keywords	Fractures / therapy / atlases ; Tibia / injuries / atlases ; Humerus / injuries / atlases ; Ulna Fractures / therapy / atlases ; Braces / atlases ; Knochenbruch ; Therapie
Subject	Medizinische Behandlung ; Behandlung ; Krankenbehandlung ; Bruch ; Fraktur ; Knochenbrüche
Language	English
Size	X, 280 S. : überwiegend Ill., graph. Darst.
Edition	[2.], rev. ed.
Publisher	Springer
Publishing place	Berlin u.a.
Document type	Book
Old title	1. Aufl. u.d.T. Sarmiento, Augusto: Closed functional treatment of fractures
HBZ-ID	HT006724762
ISBN	3-540-55356-8 ; 0-387-55356-8 ; 978-3-540-55356-4 ; 978-0-387-55356-6
Database	Catalogue ZB MED Medicine, Health

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1995 A 4225	order for loan	Magazin

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Article ; Online: Axial and Rotational Malreduction (Golf Club Deformity) in Distal Femur Fractures.

Lowe, Jason / Alhandi, Ali / Manoharan, Aditya / Ouellette, Elizabeth / Kaimrajh, David / Milne, Edward / Latta, Loren

Journal of orthopaedic trauma

2022 Volume 36, Issue 10, Page(s) 515–518

Abstract: Objectives: To describe malreduction of supracondylar distal femur fractures stabilized with lateral femoral locking plates and determine whether a mismatch in axial lateral distal femur anatomy and lateral distal femoral plate design contributes to ... ...

Abstract	Objectives: To describe malreduction of supracondylar distal femur fractures stabilized with lateral femoral locking plates and determine whether a mismatch in axial lateral distal femur anatomy and lateral distal femoral plate design contributes to supracondylar distal femoral fracture malreduction. Materials and methods: OTA/AO 33A were simulated in 7 cadaver femurs and fixed with a lateral distal locking femoral plate placed flush to the lateral femoral condyle (group 1). In group 2, the anterior flange of the plate was externally rotated 10 degrees in relation to the lateral condyle. A motion capture system measured translation and rotation of the articular segment as shaft screws were applied, reducing plate to femoral diaphysis. Articular segment movement was compared between groups using paired Student t test, P < 0.05. A large database of 3D scans of 800 femurs was used to define the relationship of the lateral femoral condyle to the lateral cortical surface of the human femur. Results: Malreduction was observed with anatomic plate application results from medial translation (17 mm) and external rotation (12.2 degrees) (group 1). Modifying plate geometry to match lateral femur anatomy (group 2) improved medial translation by 46% and external rotation by 80%. An analysis of the shape of the 800 distal femurs showed that the average posterior anterior inclination is 16.5 degrees. Conclusions: Anatomic application of distal femoral plates results in significant malreduction. Modifying the plate design to accommodate 10 degrees slope of lateral distal femur results in partial correction of deformity. Future studies should investigate other means of correcting the malalignment, especially considering the 16.5-degree posterior anterior inclination of the condyle.
MeSH term(s)	Biomechanical Phenomena ; Bone Plates ; Femoral Fractures/diagnostic imaging ; Femoral Fractures/surgery ; Femur/diagnostic imaging ; Femur/surgery ; Fracture Fixation, Internal/methods ; Golf ; Humans ; Knee Joint/surgery
Language	English
Publishing date	2022-04-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	639099-7
ISSN	1531-2291 ; 0890-5339
ISSN (online)	1531-2291
ISSN	0890-5339
DOI	10.1097/BOT.0000000000002373
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Zs.A 2234: Show issues

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Article: Mechanical performance and implications on bone healing of different screw configurations for plate fixation of diaphyseal tibia fractures: a computational study.

Travascio, Francesco / Buller, Leonard T / Milne, Edward / Latta, Loren

European journal of orthopaedic surgery & traumatology : orthopedie traumatologie

2020 Volume 31, Issue 1, Page(s) 121–130

Abstract: Diaphyseal tibia fractures may require plate fixation for proper healing to occur. Currently, there is no consensus on the number of screws required for proper fixation or the optimal placement of the screws within the plate. Mechanical stability of the ... ...

Abstract	Diaphyseal tibia fractures may require plate fixation for proper healing to occur. Currently, there is no consensus on the number of screws required for proper fixation or the optimal placement of the screws within the plate. Mechanical stability of the construct is a leading criterion for choosing plate and screws configuration. However, number and location of screws have implications on the mechanical environment at the fracture site and, consequently, on bone healing response: The interfragmentary motion attained with a specific plate and screw construct may elicit mechano-transduction signals influencing cell-type differentiation, which in turn affects how well the fracture heals. This study investigated how different screw configurations affect mechanical performance of a tibia plate fixation construct. Three configurations of an eight-hole plate were considered with the fracture in the center of the plate: eight screws-screws at first, fourth, fifth and eighth hole and screws at first, third, sixth and eighth hole. Constructs' stiffness was compared through biomechanical tests on bone surrogates. A finite element model of tibia diaphyseal fracture was used to conduct a stress analysis on the implanted hardware. Finally, the potential for bone regeneration of each screw configuration was assessed via the computational model through the evaluation of the magnitude of mechano-transduction signals at the bone callus. The results of this study indicate that having screws at fourth and fifth holes represents a preferable configuration since it provides mechanical properties similar to those attained by the stiffest construct (eight screws), and elicits an ideal bone regenerative response.
MeSH term(s)	Biomechanical Phenomena ; Bone Plates ; Bone Regeneration ; Bone Screws ; Finite Element Analysis ; Fracture Fixation, Internal/instrumentation ; Fracture Healing ; Humans ; Imaging, Three-Dimensional ; Models, Anatomic ; Models, Theoretical ; Tibia/diagnostic imaging ; Tibia/physiopathology ; Tibia/surgery ; Tibial Fractures/diagnostic imaging ; Tibial Fractures/physiopathology ; Tibial Fractures/surgery ; Tomography, X-Ray Computed
Language	English
Publishing date	2020-07-28
Publishing country	France
Document type	Journal Article
ZDB-ID	1231084-0
ISSN	1432-1068 ; 1633-8065 ; 0948-4817 ; 0940-3264
ISSN (online)	1432-1068
ISSN	1633-8065 ; 0948-4817 ; 0940-3264
DOI	10.1007/s00590-020-02749-5
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Zs.A 3479: Show issues

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Article ; Online: Cervical Spine Fusion: Biomechanics of a Three-Level Cadaver Model Comparing Anterior Plate versus Stand-Alone Cage.

McGuire, Robert / Al-Barghouthi, Abeer / Dale, Wood / Travascio, Francesco / Latta, Loren L

Journal of long-term effects of medical implants

2021 Volume 30, Issue 2, Page(s) 135–140

Abstract: Study Design-Biomechanical cadaveric study. Objective-Long anterior cervical plate and cage (APC) constructs have a risk of pseudarthrosis with minor bone resorption. Stand-alone cages (SACs) allow settling. The biomechanics of SAC have been investigated, ...

Abstract	Study Design-Biomechanical cadaveric study. Objective-Long anterior cervical plate and cage (APC) constructs have a risk of pseudarthrosis with minor bone resorption. Stand-alone cages (SACs) allow settling. The biomechanics of SAC have been investigated, but not multilevel, compression screw SAC. The purpose of this study is to evaluate the biomechanical safety of three-level SAC versus APC. Methods-Discectomies at three levels of five human cadaver spines (T1-C3) were fixed with SAC. A 0.18 mm thick shim was interposed between the cage and the superior endplate, and a pressure transducer map was placed between the cage and the inferior endplate. Tests were performed in flexion-extension and then repeated after removing the shims to simulate minor bone resorption. Subsequently, APC was applied and experiments were repeated. The pressure between each cage and endplate and motion of the implants were measured. Results-The range of motion (ROM) of SAC and APC constructs were comparable. The contact area and pressure between cage and endplate did not significantly change during motion with SAC. Shim removal did not significantly affect ROM, contact area, or average pressure measures. For APC, both contact area and pressure decreased from extension to flexion. Shim removal caused a significant loss of contact area and pressure. Conclusions-SAC provided comparable rigidity to the conventional APC construct while maintaining compression at the endplate-cage interface throughout flexion-extension and after minor bone resorption.
MeSH term(s)	Biomechanical Phenomena ; Bone Screws ; Cadaver ; Cervical Vertebrae/surgery ; Humans ; Spinal Fusion
Language	English
Publishing date	2021-01-07
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1073166-0
ISSN	1940-4379 ; 1050-6934
ISSN (online)	1940-4379
ISSN	1050-6934
DOI	10.1615/JLongTermEffMedImplants.2020035807
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Article ; Online: Comparison of Biomechanical Properties of a Synthetic L3-S1 Spine Model and Cadaveric Human Samples.

Vijapura, Anita / Kaimrajh, David N / Milne, Edward L / Latta, Loren L / Travascio, Francesco

Journal of long-term effects of medical implants

2021 Volume 30, Issue 2, Page(s) 125–129

Abstract: Human cadavers currently represent the gold standard for spine biomechanical testing, but limitations such as costs, storage, handling, and high interspecimen variance motivate the development of alternatives. A commercially available synthetic surrogate ...

Abstract	Human cadavers currently represent the gold standard for spine biomechanical testing, but limitations such as costs, storage, handling, and high interspecimen variance motivate the development of alternatives. A commercially available synthetic surrogate for the human spine, the Sawbones spine model (SBSM), has been developed. The equivalence of SBSM to a human cadaver in terms of biomechanical behavior has not been fully assessed. The objective of this study is to compare the biomechanics of a lumbar tract of SBSM to that of a cadaver under physiologically relevant mechanical loads. An L3-S1 SBSM and 39 comparable human cadaver lumbar spine tracts were used. Each sample was loaded in pure flexion-extension or torsion. Gravity and follower loads were also included. The movement of each vertebral body was tracked via motion capture. The range of motion (ROM) of each spine segment was recorded, as well as the overall stiffness of each L3-S1 sample. The ROM of SBSM L3-L4 was larger than that found in cadavers in flexion-extension and torsion. For the other spine levels, the ROMs of SBSM were within one standard deviation from the mean values measured in cadavers. The values of structural stiffness for L3-S1 of SBSM were comparable to those of cadaveric specimens for both flexion and torsion. In extension, SBSM was more compliant than cadavers. In conclusion, most of the biomechanical properties of an L3-S1 SBSM model were comparable to those of human cadaveric specimens, supporting the use of this synthetic surrogate for testing applications.
MeSH term(s)	Biomechanical Phenomena ; Cadaver ; Humans ; Lumbar Vertebrae ; Motion ; Range of Motion, Articular ; Spinal Fusion
Language	English
Publishing date	2021-01-07
Publishing country	United States
Document type	Journal Article
ZDB-ID	1073166-0
ISSN	1940-4379 ; 1050-6934
ISSN (online)	1940-4379
ISSN	1050-6934
DOI	10.1615/JLongTermEffMedImplants.2020035597
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Article ; Online: Treatment of Selected Distal Radius Fractures with Nonbridging External Fixation.

Hajianpour, M A / Sheikh, Babak / Feanny, Michael / Berkowitz, Mario / Latta, Loren L

Journal of long-term effects of medical implants

2021 Volume 30, Issue 3, Page(s) 199–204

Abstract: A nonbridging external fixation (NBX) system with 1.6-mm diameter pins provided excellent stability for distal radius fractures in cadavers. For the present study, all patients with distal radius fractures were seen by the surgeon authors. Fractures that ...

Abstract	A nonbridging external fixation (NBX) system with 1.6-mm diameter pins provided excellent stability for distal radius fractures in cadavers. For the present study, all patients with distal radius fractures were seen by the surgeon authors. Fractures that were displaced and unstable, including Orthopaedic Trauma Association (OTA) types 23-A2.3 to C3.3, were reduced and fixed with the NBX system. The Western Institutional Review Board granted approval (296864) for this retrospective study. Fractures numbered five OTA-A2, eight OTA-A3, two OTA-B3, one OTA-C1, two OTA-C2, and eight OTA-C3. In total, the study included 26 patients. At fixator removal, average dorsiflexion was 37.0° ± 17.8°; volar flexion, 39.4° ± 17.2°; pronation, 80.6° ± 16.1°; and supination, 48.1° ± 24.2°. Follow-up averaged 11.7 mo ± 19.2 mo. At final follow-up, average dorsiflexion was 52.9° ± 25.0°; volar flexion, 53.1° ± 23.7°; pronation, 80.8° ± 14.5°; and supination, 67.7° ± 30.3°. Average radial tilt at the time of injury was 11.6° ± 8.3°; post op to 23.9° ± 5.0°; and at last follow-up, 23.1° ± 5.0°. Average radial styloid length at the time of injury was 4.1 mm ± 3.7 mm; post op to 11.4 mm ± 3.0 mm; and at last follow-up, 10.5 mm ± 3.1 mm. Volar tilt at the time of injury averaged -19.6° ± 14.8°; reduced to 9.8° ± 6.3°; and at last follow-up, 7.5° ± 6.5°. This form of nonbridging fixation is safe and effective at maintaining reduced, extra- and intra-articular, distal radius fractures and allows functional range of motion with minimal complications.
MeSH term(s)	Bone Plates ; External Fixators ; Fracture Fixation ; Fracture Fixation, Internal ; Humans ; Radiography ; Radius Fractures/surgery ; Range of Motion, Articular ; Retrospective Studies ; Treatment Outcome
Language	English
Publishing date	2021-01-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	1073166-0
ISSN	1940-4379 ; 1050-6934
ISSN (online)	1940-4379
ISSN	1050-6934
DOI	10.1615/JLongTermEffMedImplants.2020036110
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