Lapidus arthrodesis. A different perspective

1994 ◽  
Vol 84 (6) ◽  
pp. 281-288 ◽  
Author(s):  
TJ Chang ◽  
JA Ruch
Keyword(s):  
Internal Fixation ◽  
Structural Stability ◽  
First Metatarsal ◽  
Fixation Principles

Fusion of the first metatarsocuneiform joint may provide correction of positional deformities of the first metatarsal while offering significant structural stability to the medial column. The authors present a modification of the Lapidus procedure that uses well established internal fixation principles.

Nitinol Compression Staples for Bone Fixation in Foot Surgery

2006 ◽  
Vol 96 (2) ◽  
pp. 102-106 ◽  
Author(s):  
Trinity M. Mereau ◽  
Timothy C. Ford
Keyword(s):  
Retrospective Study ◽  
Internal Fixation ◽  
Bone Healing ◽  
Subtalar Joint ◽  
San Antonio ◽  
Foot Surgery ◽  
Bone Apposition ◽  
First Metatarsal ◽  
Bone Fixation ◽  
Staple Fixation

We reviewed the use of compression staples made of the memory metal alloy nitinol for fixation in foot surgery. A retrospective study was performed of 31 feet in 27 patients who underwent arthrodesis or an osteotomy fixated using compression staples. OSStaples (BME, San Antonio, Texas) were used in 18 feet, and Memodyn staples (Telos Medical, Fallston, Maryland) were used in 13 feet. A total of 48 compression staples were implanted. The following procedures were performed and fixated using compression staples: 15 Akin osteotomies, 2 first metatarsal base epiphysiodeses, 3 first metatarsal–cuneiform fusions, 2 naviculocuneiform fusions, 3 calcaneocuboid fusions, 4 talonavicular fusions, 3 subtalar joint fusions, and 2 Evans osteotomies. In our clinical experience, compression staples provide an adequate source of internal fixation in foot surgery. Good bone apposition and stabilization and compression of the bone surfaces before staple fixation are important when using staple fixation to promote an optimal environment for bone healing. (J Am Podiatr Med Assoc 96(2): 102–106, 2006)

Two Case Reports of a Technique of Medial External Fixation in Calcaneal Fractures: Indirect Control of the Sustentacular Fragment

1996 ◽  
Vol 17 (4) ◽  
pp. 210-216 ◽  
Author(s):  
Keith Adrian Borowsky
Keyword(s):  
Internal Fixation ◽  
External Fixation ◽  
Open Reduction ◽  
Case Reports ◽  
Calcaneal Fracture ◽  
Calcaneal Fractures ◽  
First Metatarsal ◽  
Indirect Control

In attempted open reduction and internal fixation of displaced calcaneal fractures, comminution of the sustentacular fragment can pose major problems. Two cases of a form of external fixation are presented. The method takes advantage of the strong superomedial and plantar calcaneonavicular ligaments, which link the sustentaculum to the navicular. Traction along these structures (by pins placed in the first metatarsal) indirectly controls the sustentacular fragment, while countertraction from medially placed pins in the tuberosity allows derotation of the fragment and correct repositioning in relation to the sustentaculum. The essential deformities of a calcaneal fracture are corrected by this technique. In addition, distortion of the middle facet appears to correct as well.

Z-bunionectomy with internal screw fixation

1989 ◽  
Vol 79 (7) ◽  
pp. 322-329 ◽  
Author(s):  
KH Zygmunt ◽  
CJ Gudas ◽  
GS Laros
Keyword(s):  
Internal Fixation ◽  
Hallux Valgus ◽  
Screw Fixation ◽  
Bone Screws ◽  
Rigid Internal Fixation ◽  
First Metatarsal ◽  
Satisfaction Rate ◽  
Internal Screw

A new procedure for the correction of hallux valgus was performed on 39 patients (66 feet). The follow-up period averaged 29 months, with a range of 24 to 32 months. The new procedure is a horizontally directed displacement Z-osteotomy in the head and shaft region of the first metatarsal. Rigid internal fixation is obtained with 3.5 or 2.7-mm bone screws. The surgeons' satisfaction rate of 79% compares favorably with the patients' complete satisfaction rate of 85%.

Internal Fixation Principles

2014 ◽  
pp. 75-85
Author(s):  
Josef G. Hadeed ◽  
Jeffrey R. Marcus
Keyword(s):  
Internal Fixation ◽  
Fixation Principles

Time-resolved high-resolution electron microscopy of structural stability in mgo clusters

1996 ◽  
Vol 54 ◽  
pp. 672-673
Author(s):  
T. Kizuka ◽  
N. Tanaka
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Magnesium Oxide ◽  
Structural Stability ◽  
High Resolution Electron Microscopy ◽  
Video Tape ◽  
Solid State Physics ◽  
Time Resolved ◽  
Resolution Electron ◽  
Structural And Functional Properties

Structure and stability of atomic clusters have been studied by time-resolved high-resolution electron microscopy (TRHREM). Typical examples are observations of structural fluctuation in gold (Au) clusters supported on silicon oxide films, graphtized carbon films and magnesium oxide (MgO) films. All the observations have been performed on the clusters consisted of single metal element. Structural stability of ceramics clusters, such as metal-oxide, metal-nitride and metal-carbide clusters, has not been observed by TRHREM although the clusters show anomalous structural and functional properties concerning to solid state physics and materials science.In the present study, the behavior of ceramic, magnesium oxide (MgO) clusters is for the first time observed by TRHREM at 1/60 s time resolution and at atomic resolution down to 0.2 nm.MgO and gold were subsequently deposited on sodium chloride (001) substrates. The specimens, single crystalline MgO films on which Au particles were dispersed were separated in distilled water and observed by using a 200-kV high-resolution electron microscope (JEOL, JEM2010) equipped with a high sensitive TV camera and a video tape recorder system.

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