Injection Of Acrylic Resin Research Articles

La radiologie interventionnelle en pathologie rachidienne

The vertebroplasty is based on intracorporeal acrylic resin injection. Its 2 main objectives are analgesia and bone consolidation. Its main indications are painful and inflammatory fractures on a site of osteopathic fragility and bone metastases. Its clinical efficacy is strongly correlated with a treatment performed within 3 months post fracture. Transpedicular acrylic resin injection is performed under scopic control in order to continuously follow the intra-corporeal filling of the cement and thus limit the risk of complications. Main risks of vertebroplasty are rare and represented by the risk of extracorporeal leak, disc, foraminal, in the epidural space, the periventricular and epidural veins or the inferior vena cava or the lung about acrylic resin injection. For the spinal tumoral pathology, each file is the subject of a multidisciplinary discussion where essential elements to the global care of the patients are necessary to collect and to take into account, in particular the general state of the patient and its life expectancy and the goal of treatment (curative or palliative). The main techniques of hot ablathermy are represented by laser, radio frequency or microwaves and cold ablathermy by cryoablation. Different guidance techniques (fluoroscopy, CT, MRI, etc.) are available to interventional radiologists to perform their actions in conditions of maximum safety and efficiency. It is necessary to put in place a passive protection (thermocouple or electrostimulation) or active protection (displacement of the organs, insufflation of CO2, hydro-dissection, cooling or warming) of the neighboring organs, in particular of the nerves.

Acrylic resin injection method for blood vessel investigations

The injection of acrylic resin into vessels is an excellent method for macroscopically and microscopically observing their three-dimensional features. Conventional methods can be enhanced by removal of the polymerization inhibitor (hydroquinone) without requiring distillation, a consistent viscosity of polymerized resin, and a constant injection pressure and speed. As microvascular corrosion cast specimens are influenced by viscosity, pressure, and speed changes, injection into different specimens yields varying results. We devised a method to reduce those problems. Sodium hydroxide was used to remove hydroquinone from commercial methylmethacrylate. The solid polymer and the liquid monomer were mixed using a 1 : 9 ratio (low-viscosity acrylic resin, 9.07 ± 0.52 mPa•s) or a 3:7 ratio (high-viscosity resin, 1036.33 ± 144.02 mPa•s). To polymerize the acrylic resin for injection, a polymerization promoter (1.0% benzoyl peroxide) was mixed with a polymerization initiator (0.5%, N, N-dimethylaniline). The acrylic resins were injected using a precise syringe pump, with a 5-mL/min injection speed and 11.17 ± 1.60 mPa injection pressure (low-viscosity resin) and a 1-mL/min injection speed and 58.50 ± 5.75 mPa injection pressure (high-viscosity resin). Using the aforementioned conditions, scanning electron microscopy indicated that sufficient resin could be injected into the capillaries of the microvascular corrosion cast specimens.

Plastic Injection Method for Preparing Microvascular Corrosion Casts for SEM and its Practical Application

This paper examines the application of the acryl plastic injection to the preparation of vascular corrosion microcasts for scanning electron microscopy (SEM). The original injection method using acryl plastic was described by Taniguchi, Ohta et al. in 1952 and 1955, under the title of "New improved method for injection of acrylic resin". Three dimensional observations were undertaken in our laboratory on the angiology at the macro- and microscopic levels of various organs from various mammals employing the original method. Based on this extensive experience, an injection method for preparing corrosion microcasts for use in SEM was devised in our laboratory. Microcasts prepared by the present method were able to demonstrate the fine vascular architecture of each organ. In general, although applications for preparing vascular microcasts of isolated and parenchymal organs are not so difficult, the method can be used to be applicable for demonstrating the fine vascular architecture related to or within hard tissues, as well as for investigating the morphological relations between changes of vascular patterns and restorative changes in the surrounding tissues affected by experimental operations. SEM microphotographs are also presented to illustrate actual practical applications.

A morphological study of the capillary structures underlying the lingual dorsal mucosa of the golden hamster.

India ink- and the acrylic resin-injection techniques were used to demonstrate the capillary structures underlying the lingual papillae. There are five types of lingual papillae on the dorsum of the tongue. The capillary loops and network are under the lingual dorsal mucosa, and beneath the fungiform papillae; capillary loops surrounds the papillae in a petal-shaped configuration. Below the foliate papillae, the capillary network surrounds the circumference of the groove making a round cave. There was a vallate papilla where the venules were directed sagittally and the capillary network covered them. In these three types of lingual papillae, the capillary loops and network entered into the papilla. Under the giant conical papillae, located on the lingual prominence, the capillary network formed a leaf-like arrangement similar to that of the lotus. On the other hand, the capillaries formed hairpin-shaped loops underneath the cone-shaped filiform papillae. These capillary loops did not enter into the cone-shaped filiform papillae but were situated in the connective tissue papillae under the lingual dorsal epithelium. These capillary loops are thought to play a nutritional role only to the lingual dorsal epithelium.

Microvascularization of gingival wound healing using corrosion casts.

The healing process in a wound induced by removal of 6 X 6 mm of gingiva and periosteum from the maxillary attached gingiva of 48 adult mongrel dogs was observed to investigate the potential blood supply for grafts placed on denuded bone. Three-dimensional observations were performed over 12 weeks by scanning electron microscopy (SEM) following the manufacture of corrosion capillary casts by acrylic resin injection. Revascularization in the gingival wound was mainly through formation of new capillaries from those existing below the surrounding epithelium with little new capillary formation from the Volkmann canals. Moreover, the periodontium contributed greatly to the vascularization, which was fastest from the gingival margin. Further, simplification of new capillary loops was also fastest from this direction. Regeneration of the periosteum and periosteal vascular plexus was slow, taking about twice the time of connective tissue and capillaries below the epithelium. The results indicated that blood supply to grafts on denuded bone in the early postgraft period would mainly be provided by capillaries below the epithelium surrounding the recipient bed.

Vascular architecture of the canine prepuce.

AbstractThe blood supply of the canine prepuce is described as studied with gross dissection and acrylic resin injection casts. The conclusions of this study are based on gross dissection of 10 animals and 12 injection cast preparations. The arterial supply and the venous drainage is described in some detail and compared with similar descriptions by other investigations utilizing similar and varied techniques.

Morphologic studies on the capillary loops of the human tongue

The post mortem which was obtained from the tongue of more than ten human adults was examined. The cast of the capillary loops was made by means of injection of acrylic resin via the lingual artery, and then was observed under a scanning electro-microscope. In the filiform papillae the small arteries parallel to the surface of the tongue and make small networks, from which a small branch is given off enters the papillae to be divided into three capillary loops which rise towards the top of papillae. In the circumvallate papillae the small branches rise from networks which are made in the submucosal membrane. The branches give off numerous capillary loops which rise towards the surface of the papillae. The loops decrease in height near the bottom of the groove. The fungiform papillae receives the capillaries from bottom of papillae of capillary beds, and capillary loops are arranged radially towards the surface, and are observed among them.

Studies on the vascular supply of the bovine uterus. 2. Morphological study of arteries of the uterine wall with special reference to those in the caruncular region

The arterial system of the bovine uterus has been studied by Ellenbogen, Hanseland Asdell, Hilliger, Reuber and Emmerson, and Tsutsumi. Nevertheless, there havebeen only a few accounts on comparative studies regarding the caruncular region ofnulliparous heifer, multiparous cow, and pregnant cow. In the present investigation, atotal of 61 uteri from l 1 nulliparous heifers, 12 multiparous cows, and 38 pregnant cowswere used. Casts of arteries were prepared for this purpose by means of the intra-vascular injection of acrylic resin. Apart from the casts just mentioned above, tissueblocks were obtained from some uteri injected with resin. Transparent slices andcelloidin sections were also made. In addition to resin-injected materials, those injectedwith gelatine were also used. Paraffin sections of the caruncle were prepared fromnon-injected materials fixed in 10% formalin, Carnoys, Zenkers, or Bouins fluid, andstained with hematoxylin and eosin.The arcuate artery proceeded toward the antimesometrial margin within the stratumvasculare of the uterine wall. Many of them anastomosed with adjacent ones in arxarchfasluion at about 1/2 to 2/3 of the circumference of the horn from the mesometrialmargin. Finally, they terminated in an anastomosis with those of the contralateral rowon the antimesometrial margin. Meanwhile, many smaller arcuate arteries joined thearchfashioned anastomoses described just above. The arcuate arteries in a nulliparousheifer were nearly straight until they formed an anastomosing net, and thereafter theybecame strongly tortuous. On the other hand, those in multiparous cows were stronglytortuous throughout their course. Meanwhile, those arteries were almost straight ina cow which was in the second half of pregnancy.The arcuate artery gave ofl a radial artery to the caruncle and a branch to thecircular muscle. The radial artery usually give origin to a basal artery within thestratum vasculare, which supplied inner one-third of the circular muscle and stratum basale of the endometrium. The main trunk of the radial artery usually bifurcatedonce or twice in the endometrium and finally divided into many arterioles at the baseof the caruncle. These arterioles gave off many pre-capillary vessels which, in turn, continued to the subepithelial capillary net. TIIC radial arteries, especially those inthe caruncular region, were much more tortuous in the multiparous cow than in thenulliparous lueifer. Well-developed capillary networks were also present in the circularmuscle.In tlne second half of pregnancy, the arteries became adapted to the expansion ofthe uterus witlt the following modifications. The radial artery proceeded toward thetop of the peduncle, taking a course almost perpendicular to the base of it. Then, it divided into many arterioles, which proceeded to the bottom of the placentome, takinga fan-fashioned course. At the base of the placentome, these arterioles gave origin tocaruncular radial arteries, which were found to be rather thin at tlaeir origin and whichbecame thicker on their way to the surface of the placentome. The caruncular radialarteries in t[te placentome seemed to be an extension of the pre-capillary vessels whichwere invariably found near the surface of a caruncle in the nulliparous heifer, as wellas in the mu[tiparous cow.

Supplement to new improved method for injection of acrylic resin.

Supplement to new improved method for injection of acrylic resin.

New improved method for injection of acrylic resin

New improved method for injection of acrylic resin