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Possible migration and histopathological analysis of injections of polymethylmethacrylate in wistar rats.

Neves Rd, Herdt MA, Wohlgemuth FB, Ely JB, de Vasconcellos ZA, Bastos JC, d'Acampora AJ - ISRN Dermatol (2012)

Bottom Line: Two animals had nonspecific spleen alterations.Conclusion.The histopathological analysis of this study found no PMMA microspheres in any of the tissues analyzed.

View Article: PubMed Central - PubMed

Affiliation: Department of Surgery, Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.

ABSTRACT
Objective. To evaluate the possible migration of polymethylmethacrylate after injections in various corporal compartments of Wistar rats. Methods. The experimental work consisted in the injection of PMMA in corporal compartments for later histopathological analysis of the locations of implants and of distant filtering organs. The dose applied in each implant was of 0.2 mL. The animals were divided into groups according to the location of the implant realized: group GB had intradermic injections in the glabella. Group SD had subdermal injections in dorsal subcutaneous tissue cells. Group IP had intraperitoneal injections in the abdomen. Group PD had intramuscular injections in the right rear leg. The rats were sacrificed 30 days after realization of the implants and tissue samples from the lung, liver, spleen, and kidney, and locations of implantation were removed for histopathological analysis. Results. Characteristic microspheres that were compatible with the presence of PMMA in any of the histological slides analyzed were not observed. One animal had an amorphous exogenous substance, with a histiocytic reaction. Twelve of the 16 lungs analyzed had locations of intraalveolar hemorrhaging. Two animals had nonspecific spleen alterations. Conclusion. The histopathological analysis of this study found no PMMA microspheres in any of the tissues analyzed.

No MeSH data available.


Related in: MedlinePlus

Photos of PMMA under electronic microscope (×800). (a) Microspheres of PMMA of different sizes with impurities in bone cement. (b) Artefill after washing and purification of the PMMA microspheres. source: Lemperle, 2003.
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fig1: Photos of PMMA under electronic microscope (×800). (a) Microspheres of PMMA of different sizes with impurities in bone cement. (b) Artefill after washing and purification of the PMMA microspheres. source: Lemperle, 2003.

Mentions: According to Lemperle, these complications were due to impurities that adhered to the microspheres. In 1994, the Artecoll microspheres were modified, so that they would have absolutely smooth and spherical surfaces (Figure 1) [10]. In an attempt to decrease complications even more, new techniques for the removal of impurities were utilized.


Possible migration and histopathological analysis of injections of polymethylmethacrylate in wistar rats.

Neves Rd, Herdt MA, Wohlgemuth FB, Ely JB, de Vasconcellos ZA, Bastos JC, d'Acampora AJ - ISRN Dermatol (2012)

Photos of PMMA under electronic microscope (×800). (a) Microspheres of PMMA of different sizes with impurities in bone cement. (b) Artefill after washing and purification of the PMMA microspheres. source: Lemperle, 2003.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3369493&req=5

fig1: Photos of PMMA under electronic microscope (×800). (a) Microspheres of PMMA of different sizes with impurities in bone cement. (b) Artefill after washing and purification of the PMMA microspheres. source: Lemperle, 2003.
Mentions: According to Lemperle, these complications were due to impurities that adhered to the microspheres. In 1994, the Artecoll microspheres were modified, so that they would have absolutely smooth and spherical surfaces (Figure 1) [10]. In an attempt to decrease complications even more, new techniques for the removal of impurities were utilized.

Bottom Line: Two animals had nonspecific spleen alterations.Conclusion.The histopathological analysis of this study found no PMMA microspheres in any of the tissues analyzed.

View Article: PubMed Central - PubMed

Affiliation: Department of Surgery, Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.

ABSTRACT
Objective. To evaluate the possible migration of polymethylmethacrylate after injections in various corporal compartments of Wistar rats. Methods. The experimental work consisted in the injection of PMMA in corporal compartments for later histopathological analysis of the locations of implants and of distant filtering organs. The dose applied in each implant was of 0.2 mL. The animals were divided into groups according to the location of the implant realized: group GB had intradermic injections in the glabella. Group SD had subdermal injections in dorsal subcutaneous tissue cells. Group IP had intraperitoneal injections in the abdomen. Group PD had intramuscular injections in the right rear leg. The rats were sacrificed 30 days after realization of the implants and tissue samples from the lung, liver, spleen, and kidney, and locations of implantation were removed for histopathological analysis. Results. Characteristic microspheres that were compatible with the presence of PMMA in any of the histological slides analyzed were not observed. One animal had an amorphous exogenous substance, with a histiocytic reaction. Twelve of the 16 lungs analyzed had locations of intraalveolar hemorrhaging. Two animals had nonspecific spleen alterations. Conclusion. The histopathological analysis of this study found no PMMA microspheres in any of the tissues analyzed.

No MeSH data available.


Related in: MedlinePlus