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An evisceration implant made from a highly porous inert, Teflon fluorocarbon, Proplast II, and the surgical technique of implantation is described. The implant was used in four eyes without complications. The implant and technique have many advantages: the ability to absorb antibiotics: the ability to prevent extrusion and infection; the fact that it is lightweight, black in color, and capable of preserving the cornea.
A preliminary report of a new design for a buried quasi-integrated implant made of Proplast II (Vitek, Inc., Houston, Texas, U.S.A.) is presented. The design is intended to combine the benefits of an integrated and buried implant.
Proplast-Teflon (Vitek Inc., Houston, TX, U.S.A.) interpositional implants (PTIPIs) have been removed from the market due to complications that include severe bony destruction of both condyle and fossa as a result of exuberant foreign body giant cell reaction. As per Food and Drug Administration recommendations, the radiologist will often be called to evaluate the status of these implants in the large population that received them. We present a case of bilateral PTIPIs with nonreducing anterior displacement of the meniscal prosthesis made more apparent by cine MRI. Extensive granulomatous reaction in the temporal bone exhibited mobility with cine.
Two cases of late infection following aesthetic malar augmentation with Proplast implants are described. The etiology appears to be contamination because of erosion of the implants through the thin wall of the anterior maxilla. This problem might be avoided by confining placement of the implant over the thick portion of the zygoma.
Proplast reconstruction of iliac crest defects resulting from bone grafts taken for anterior lumbar and cervical fusions is described. The procedure improves the cosmetic result, prevents postoperative muscle herniation and may decrease postoperative donor site pain. It is a simple procedure with low complication rate when performed in the manner described.
Six patients had osseous destructive changes of the temporomandibular joint after placement of Teflon-Proplast implants for treatment of internal derangements. The implants were surgically removed from all six joints, and foreign-body reactions were found to account for the radiographic appearance. The plain film radiographic features included single or multiple osseous erosions of the mandibular condyle in all cases and the temporal bone of the glenoid fossa in two cases. Some erosions were poorly defined, whereas others were well defined, either with or without sclerotic margins. Radiologists must be aware of this possible complication of alloplastic temporomandibular joint implants in order to suggest the diagnosis in the appropriate clinical setting.
'Proplast,' a Teflon fluorocarbon polymer and carbon fiber composite, was used as support for a polymethyl-methacrylate cylinder in a keratoprosthesis that was implanted in rabbit corneas with successful retention for up to 3 years.
The use of Proplast in the restoration of contour defects and for reconstruction of alveolar ridges is described. An evaluation of the results of treatment suggests it is a useful material for the restoration of facial contour, but that there is a significant risk of infection when the intra-oral approach is adopted.
In order to determine the efficacy of applying Proplast to dental endosseous bladevent implants, this material was coated on half of sixteen such implants which were bilaterally placed in the mandibles of eight rhesus monkeys. No difference in the clinical acceptability could be ascertained between the two groups. Histologic examination revealed a loose connective tissue layer around the noncoated implants which was not evident around the coated ones.
The treatment results in 31 consecutive patients treated with Proplast for chin augmentation show good clinical succes with the implant. A critical analysis of treatment results reveals that attention to certain details of the preoperative evaluation, surgical technique, and postoperative care can make for impressive results. These facts are discussed.
We compared, histologically and biochemically, the effects of blood pretreatment vs. no pretreatment on the ingrowth of scar into subcutaneously implanted blocks of Proplast in rats. No significant differences were found.
We report our experiences with 38 Proplast implants to the face, with 33 results which we classified as good. The material seems to be biocompatible, and because it is porous there is rapid tissue ingrowth into it.
Proplast, a recently developed biologically acceptable synthetic polymer has been utilized in replacement of the cervical tracheas of five dogs. The results of this initial study are encouraging and, in the opinion of the authors, justify further experimentation with this refined prosthetic model.
The use of Proplast as an implant material is described in the treatment of atrophic rhinitis. It offers an alterantive implant material to bone graft obtained from the patient. There is no resutling morbidity in relationship to a donor site.
A new technique has been reported to construct partial or almost complete sound-conduction systems in the middle ear by aid of the new materials Proplast and Plastipore. The results of this surgical method are encouraging.
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Severe bone erosion within the temporomandibular joint reconstructed with polytetrafluoroethylene implants is a well-recognized phenomenon. Although erosion into the middle cranial fossa has been reported, we know of no report of dural disruption with cerebrospinal fluid leakage. We report a case of cerebrospinal fluid leak noted at the time of PTFE implant removal and its subsequent management. Perforation of the contralateral glenoid fossa and its reconstruction is also reported.
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