Emprego de prótese intra-ocular de resina acrílica. Estudo experimental em ratos

Rahal, Sheila Canevese; Schellini, Silvana Artioli; Marques, Sílvio Alencar; Ranzani, José Joaquim Titton

doi:10.1590/s1413-95962000000400004

Cited by 3 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A evolução do paciente durante o período de nove meses após o procedimento, foi satisfatória, sem presença de secreção ou inflamação local e ausência de sinais clínicos de expulsão do implante de PMMA, além de manutenção do volume orbital, apresentando aparência cosmética deleitável. Estas observações se assemelham com os relatos descritos em estudos com ratos [17] e em cães e gatos [19]. Contudo, algumas complicações como secreção ocular e diminuição do volume orbital puderam ser observadas nos pacientes após um ano do procedimento cirúrgico [17].…”

Section: Discussionunclassified

“…Exenteração é indicada em casos tumores orbitais ou oculares que se estendam até o espaço retrobulbar e tem como resultado uma órbita côncava e esteticamente inaceitável [23], principalmente em raças caninas mesocefálicas e dolicocefálicas [14]. Como consequência, o tutor desenvolve o mesmo sentimento de aversão à perda do olho do seu animal que teria para à perda de um olho "humano" [19]. Diversos materiais para implante na órbita vêm sendo estudados e utilizados em várias espécies [17,20], alguns com sucesso, como é o caso da resina acrílica ou polimetilmetacrilato (PMMA).…”

Section: Introductionunclassified

“…O PMMA é considerado um dos materiais mais difundidos [14] por seu baixo custo [10,24], conveniência e efeitos adversos quase inexistentes [19,24] e por proporcionar um aspecto estético satisfatório após o preenchimento da cavidade anoftálmica [15,17,18,24].…”

Section: Introductionunclassified

See 2 more Smart Citations

Use of Acrylic Resin to Fill the Orbital Cavity after Exenteration in a Dog with Conjunctival Hemangiosarcoma

Teixeira

Buquera

Lucena

et al. 2019

Acta Scientiae. Vet.

View full text Add to dashboard Cite

Background: The hemangiossarcoma (HSA) is a malignant tumor originated from the alterations of vascular endothelial cells. As it has an aggressive behavior, it is indicated, as initial treatment, wide surgical excision, such as the exenteration, which results in the surgical removal of the ocular bulb and adjacent tissues. The referred technique has as a result a concave orbit and aesthetically unacceptable. Therefore, various materials, used as orbital implants, have been studied and used in several species. Thus, it was aimed to report the use of the polymethylmethacrylate (PMMA) to fill the orbital cavity after exenteration in a dog with conjunctival HSA.Case: A 10-year-old male Pitbull dog was assisted, with a clinical history of growth of a reddish tissue in the left eye, causing constant hemorrhage, with an evolution of two months. At ophthalmic examination of the left eye, in the temporal bulbar conjunctive was found a reddish neoformation, with an irregular surface, measuring approximately 4x2x2 cm. The biopsy and aspiration cytology of the neoformation, revealed cells that inferred that they were those of conjunctival HSA. The hemogram revealed normocytic anemia; the biochemical profile was with the standards of normality and no metastasis were found in the ultrasonography and X-ray. The treatment of choice was the exenteration. Initially, the palpebral borders were approximated using continuous simple suture wit monofilament nylon thread. An incision was made in the skin, along the orbital rim and then was performed a rhombus dissection of the conjunctive and all the extraocular muscles. Next, the eye globe, together with the neoplasia, soft tissues of the orbital cavity and third eyelid were removed. The PMMA was obtained from a mixture of the powder (polymer) and of the liquid (monomer) in the ratio of 1:1 in a sterile recipient, in order to obtain a liquid suspension. Still in its paste-like form, the PMMA was molded in the orbit itself without going beyond its limits, filling in. At the moment of the polymerization of the PMMA, the site was irrigated with cold sterile saline solution for the reduction of the temperature caused by the thermal reaction. For the closing of the conjunctive, a continuous simple suture was performed, using 910 4-0 polyglactin thread and, in the suture of the skin, simple interrupted stiches were used with 3-0 monofilament nylon thread. After the surgery, tramadol hydrochloride was administered at a dose of 2 mg/kg/SC and meloxicam at a dose of 0.1 mg/kg/SC. In the post-operative phase, the animal was treated with ampicillin suspension at a dose of 20 mg/kg/TID/PO during 10 days; metronidazole at a dose of 15 mg/kg /BID/PO during 10 days and the application of 0.5% chloramphenicol ocular ointment, 10.000UI of retinyl acetate and 2.5% amino acids on the stiches, SID, until their removal. After nine months, the owner reported a satisfactory result in relation to the aesthetic aspect, denying the presence of any ocular alterations or discomfort of the animal.Discussion: The use of the PMMA implant proved to be an excellent alternative to fill the anophthalmic cavity after exenteration in a dog with conjunctival HSA, seen as it provided, most importantly, the maintenance of the orbital volume, granting an adequate aesthetic aspect, already established among some authors, without the presence of secretion, inflammation and local infection. It is worth emphasizing that, despite the patient in question having been treat with a broad-spectrum antibiotic after the surgery, in other reports, the absence of local infection was associated to the high temperature that the PMMA reaches during the exothermic reaction in the polymerization stage. Furthermore, the referred implant is cost-effective, offers easy molding to the orbit and absence of extrusion. In light of this, it is therefore suggested that the referred implant is a pertinent alternative for use in similar cases.

show abstract

Section: Discussionunclassified

Section: Introductionunclassified

See 1 more Smart Citation

Use of Acrylic Resin to Fill the Orbital Cavity after Exenteration in a Dog with Conjunctival Hemangiosarcoma

Teixeira

Buquera

Lucena

et al. 2019

Acta Scientiae. Vet.

View full text Add to dashboard Cite

show abstract

“…Nasisse et al (1988) by implanting silicone and Rahal et al (2000b), PMMA, reported that the corneal changes may result from malnutrition of the endothelium, with progressive degeneration of the lamellae. However, Brightman et al (1977) and Koch (1981), evaluating dogs that received silicone implants, discussed that the appearance of the cornea after surgery depends on the surgical conditions, since the endothelial disorder at the time of surgery would interfere with the final result.…”

Section: Discussionmentioning

confidence: 99%

“…However the PMMA microspheres are still routinely used in veterinary medicine for improvement of the cosmetic disfigurement of patients (Spiess & WallinHäkanson, 1999), and also because of its low cost, convenience, and almost nonexistent adverse effects (Rahal et al, 2000b;Talieri et al, 2004), therefore, the aim of this study was to evaluate PMMA spheres as intraocular implants in rabbits subjected to evisceration.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of polymethylmethacrylate as ocular implant in rabbits subjected to evisceration

et al. 2012

View full text Add to dashboard Cite

Avaliação do polimetilmetacrilato como implante ocular em coelhos submetidos à evisceraçãoApós a remoção do volume ocular ou de seu conteúdo, o implante de esferas de diferentes tipos de materiais previne a concentração da cavidade orbital. O objetivo deste estudo foi avaliar a esfera de polimetilmetacrilato (PMMA), utilizado como implante intraocular em coelhos submetidos à evisceração. Doze coelhos da raça Nova Zelândia foram submetidos à evisceração unilateral do olho esquerdo, com posterior implantação da esfera de PMMA com 12 mm de diâmetro. A avaliação clínica foi realizada diariamente nos primeiros 15 dias após a cirurgia e em intervalos de 15 dias até o final do período de estudo (180 dias). Para análise histopatológica, três animais por período experimental foram submetidos à enucleação aos 15, 45, 90 e 180 dias após a evisceração. Não foi observada deiscência da ferida, sinais de infecção ou extrusão do implante em nenhum dos animais durante todo o período do estudo. O exame histológico revelou a formação de tecido fibrovascular ao redor dos implantes. O PMMA comportou-se como material inerte e não-integrável.Palavras-chave: prótese intraocular, enucleação, evisceração.

show abstract

Primary Closure of Infected Wound Infested by Fly Larvae—Case Report in Dog

Leal¹,

Silva²,

Magalhães³

et al. 2019

OJAS

View full text Add to dashboard Cite

One of the most common aggravating factors of wounds is the myiasis. Flies lay their eggs on the wound, they hatch and release a larval form of the dipteran, which feeds on host tissues leading to necrosis and large production of exudate, thus, it is an extremely pleasant environment to bacterial multiplication. The aim of this study was to describe the case of a dog that displayed an infested larvae ulcerated tumor in the ocular region. Successful results were obtained when performing surgical treatment of the wound with healing by primary closure. The 13-year-old female dog, 30 kg, was brought to the Veterinary Clinic of Ingá University Center, Maringá-PR, Brazil, with the main complaint of an ulcerated left ocular tumor. The owner could not tell when the problem had started. After the patient's physical and laboratory evaluation, which were within normal parameters, enucleation was scheduled for tumor removal. On the day of surgery, the owner reported large mucopurulent secretion and foul odor at the site. The patient was taken for the larvae removal surgical procedure and later enucleation. The wound was debrided and washed with physiological solution, and then tarsorrhaphy was performed and a Penrose drain was applied. The animal returned 15 days later with the wound fully healed. As a conclusion with the current report, the primary closure treatment with the use of drain after intense debridement of a fly larvae infected wound can be a good alternative, especially when it is aimed at faster healing.

show abstract

Emprego de prótese intra-ocular de resina acrílica. Estudo experimental em ratos

Cited by 3 publications

References 0 publications

Use of Acrylic Resin to Fill the Orbital Cavity after Exenteration in a Dog with Conjunctival Hemangiosarcoma

Use of Acrylic Resin to Fill the Orbital Cavity after Exenteration in a Dog with Conjunctival Hemangiosarcoma

Evaluation of polymethylmethacrylate as ocular implant in rabbits subjected to evisceration

Primary Closure of Infected Wound Infested by Fly Larvae—Case Report in Dog

Contact Info

Product

Resources

About