Modified technique for preparing a polyurethane lining for facial prostheses

Lemon, James C.; Martin, Jack W.; King, Gordon E.

doi:10.1016/0022-3913(92)90459-n

Cited by 17 publications

(15 citation statements)

References 1 publication

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“…When bonded to the surface of a facial prosthesis, polyurethane seals the more porous silicone material, yields increased tear strength, and provides improved marginal integrity. A polyurethane liner also makes the tissue surface more receptive to water‐based adhesives 5,6 . In turn, the use of water‐based adhesives results in improved cleansability, as well as decreased bacterial and fungal growth.…”

mentioning

confidence: 99%

The Effects of Primers and Surface Bonding Characteristics on the Adhesion of Polyurethane to Two Commonly Used Silicone Elastomers

Chang¹,

Hansen²,

Phoenix³

et al. 2008

Journal of Prosthodontics

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Purpose: When restoring facial defects, maxillofacial prosthodontists and anaplastologists are often limited by material deficiencies. Silicone elastomers bonded to a polyurethane liner best satisfy the functional and esthetic requirements necessary for facial prostheses; however, patients using silicone prostheses with polyurethane liners often experience varying degrees of debonding at the polyurethane-silicone interfaces. This may result in failure of such prostheses. The purpose of this investigation was to evaluate the effects of five primers on bonding between polyurethane and two commonly used silicone elastomers. Following fabrication, specimens were attached to a universal testing machine and separated in tension at a crosshead speed of 25.4 mm/min. One examiner performed the assessment of T-peel strength (N/mm), peak load (N), and peel distance (mm) for all specimens. Mean data were analyzed using one-way ANOVA followed by Fisher's protected significant difference multiple comparison of the means (α = 0.05). Results: A statistically significant difference (p < 0.05) in T-peel strength was found among specimen groups. Post hoc analysis indicated that Sofreliner MS primer (1.32 ± 0.13 N/mm) and Sofreliner T primer (1.25 ± 0.11 N/mm) increased the bond strengths significantly compared to A-330-G primer (0.91 ± 0.10 N/mm) and Udagama's technique (0.13 ± 0.02 N/mm). Cohesive failure between silicone A-2000 and polyurethane liner was observed when Sofreliner MS primer and Sofreliner T were used. Conclusion: Within the limitations of this study, the use of Sofreliner MS primer and Sofreliner T primer produced significant increases in the bond strength of silicone elastomer to polyurethane liner material. Based on T-peel strength, peel distance, and peak load data, the combination of silicone A-2000 and Sofreliner MS primer resulted in the greatest mean bond strength for silicone-to-polyurethane applications.According to the American Cancer Society, head and neck cancers account for 3 to 5% of all cancers in the United States. These cancers are more commonly found in males and in persons over age 50. Moreover, an estimated 40,500 U.S. citizens develop head and neck cancers each year.1 Because many head and neck cancers are treated surgically, the resulting defects can be esthetically compromising and emotionally devastating. Advances in prosthetic therapy and reconstructive surgery have yielded significant improvements in function and appearance. Facial prostheses can be constructed using elastomers

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mentioning

confidence: 99%

The Effects of Primers and Surface Bonding Characteristics on the Adhesion of Polyurethane to Two Commonly Used Silicone Elastomers

Chang¹,

Hansen²,

Phoenix³

et al. 2008

Journal of Prosthodontics

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“…The light-weight facial prosthesis facilitates better retention with magnets. The problems of delamination of silicone from PMMA base can be easily overcome by bonding the processed silicone to an underlying substructure with medical adhesive type A under vacuum as described by Lemon et al10 This technique is advantageous as there is no need to fabricate the whole prosthesis again in case of discoloration or damage of the silicone layer because the outer silicone layer can be removed and re-packed with the new silicone on the PMMA substructure if the mold is preserved.…”

Section: Discussionmentioning

confidence: 99%

“…The prosthesis was packed with a MDX4-4210-base silicone (Dow Corning Corp, Midland, MI, USA) and colored using intrinsic stains (KT-699, Silicone Coloring Kit; Factor II, Lakeside, AZ, USA) selected according to the patient's skin color. The silicone was heated for 2 hours at 90℃, deflasked, trimmed, cleaned, and bonded to the underlying framework with medical adhesive type A (Factor II) under vacuum as described by Lemon et al10 Polyurethane lining was applied to the margins to increase the tear resistance of the marginal silicone 10,11. The prosthesis was trial fitted and extrinsically colored with trichlorethane, medical adhesive type A and oil pigments (Factor II) thus completing the fabrication of extraoral section of the IECP.…”

Section: Case Reportmentioning

confidence: 99%

Modified technique to fabricate a hollow light-weight facial prosthesis for lateral midfacial defect: a clinical report

Patil

2010

J Adv Prosthodont

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Large oro-facial defects result from cancer treatment consequences in serious functional as well as cosmetic deformities. Acceptable cosmetic results usually can be obtained with a facial prosthesis. However, retention of a large facial prosthesis can be challenging because of its size and weight. This article describes prosthetic rehabilitation of a 57-year-old man having a right lateral mid-facial defect with intraoral-extraoral combination prosthesis. A modified technique to fabricate a hollow substructure in heat-polymerizing polymethyl-methacrylate to support silicone facial prosthesis was illustrated. The resultant facial prosthesis was structurally durable and light in weight facilitating the retention with magnets satisfactorily. This technique is advantageous as there is no need to fabricate the whole prosthesis again in case of damage of the silicone layer because the outer silicone layer can be removed and re-packed on the substructure if the gypsum-mold is preserved.

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“…), and a 0.005-inch polyurethane sheet (Factor II, Lakeside, AZ). A polyurethane liner will make the tissue surface adheophilic for water-based adhesives and improve the tear strength of the thin edges of the prosthesis 7,8 (Figs 4 and 5). 7.…”

Section: A Separator (Vita-sep; Fricke Internationalmentioning

confidence: 99%