ABSTRACT
BACKGROUND: Breast augmentation was performed on nine female volunteer patients to determine the influence of three textured surfaces on fibrous capsule formation. The high degree of surface texture reduced the capsular fibrous tissue formation. METHODS: Patients were distributed according to the degree of texture created by the open-pore diameter and depth of the surface texture. Macroscopic and histological examinations were performed to evaluate the implant texture and fibrous capsule interface. Magnetic resonance imaging established a mutual correlation with breast firmness achieved by the Baker grade. RESULTS: The parallelogram law was applied to linear vectors arising from the same initial point into the concavities or undulations on the textured surface to achieve the resultant contraction vector. They were identical to resultant vectors created on the fibrous capsule except in the inverted direction. The adhesive effect or mirror-image tissue response to the implant texture on the fibrous capsule noticeably reduced capsular contracture but only with macrotextured implants. Increased capsular contracture resulted from implants showing micro- and medium surface texture with no significant difference between them. CONCLUSION: Biocell™ implants created resultant vectors on the capsular interface of small and similar lengths with divergent directions creating natural breast firmness. Biodegradation of Polyurethane™ foam disrupted the texture from creating resultant vectors of long and different lengths and in variable directions, increasing breast firmness from 12 months. Siltex™ implants created few and very long resultant vectors perpendicular to the fibrous capsule that developed fibrous capsule contraction after 9 months. We conclude that implants with macrotextured surfaces significantly reduced the risk of fibrous capsular contraction.
Subject(s)
Breast Implants/adverse effects , Implant Capsular Contracture/physiopathology , Mammaplasty/adverse effects , Adult , Biomechanical Phenomena , Equipment Design , Female , Fibrosis , Humans , Implant Capsular Contracture/etiology , Implant Capsular Contracture/pathology , Middle AgedABSTRACT
Os autores relatam caso de múltiplos carcinomas basocelulares no dorso nasal, tratados comcrioterapia, cirurgia e uso tópico de 5-fluoracil. Os múltiplos tumores não foram recidivas detumores anteriores, mas decorrentes da qualidade da pele do dorso nasal. Isto ficou evidentena biopsia após a ressecção cirúrgica, demonstrando ausência de comprometimento nasmargens da ressecção. A ulceração por uso prolongado do 5-fluoracil ocorreu pela ação doquimioterápico sob o tecido normal. A retirada da pele do dorso até a base da pirâmide nasalfoi realizada para evitar novos tumores sobre a mesma. A reconstrução por dois retalhoscutâneos de hemiface permitiu a reparação do nariz, sem comprometer o contorno facial.
The authors report a case of multiples basal cell carcinoma (BCC) over the dorsum treatedwith criotherapy, surgery and 5-fluoracil. They were not recurrence of former tumors occurringdue to the poor skin quality. It was clearly showed through the biopsy exhibitingno BCC at the margin of resection. The wound caused by excessive use of 5-fluoracil wasdue to chemotherapy action over the normal skin. Removal of the skin from the dorsumto the base of the nose was performed to avoid new BCC. Reconstruction using cutaneousflaps on both sides of the face restored the nose and facial contour.
Subject(s)
Humans , Male , Aged , Carcinoma, Basal Cell , Cryotherapy , Epidermis/surgery , Nose Neoplasms , Surgical Flaps , Surgical Procedures, Operative , Methods , Patients , Diagnostic Techniques and ProceduresABSTRACT
Introdução: A infusão controlada do dióxido de carbono eleva a temperatura cutânea no local da aplicação. O aumento da temperatura ocorre em razão da resposta inflamatória local, com dilatação dos vasos da microcirculação cutânea. Método: A temperatura da pele foi avaliada em 10 pacientes, 7 mulheres e 3 homens, apresentando flacidez cutânea com aumento da gordura subjacente na face medial do braço e parede abdominal anterior. Os valores da temperatura foram obtidos, antes e após a infusão controlada do dióxido de carbono, usando um termômetro digital. Resultados: Após a infusão controlada do dióxido de carbono houve aumento médio da temperatura cutânea de 3,48°C, no local da aplicação. Conclusão: A vasodilatação da microcirculação cutânea acompanhada pelo aumento do fluxo sanguíneo periférico, após a infusão controlada do dióxido de carbono, provocou um aumento da temperatura no local da aplicação.
Introduction: Carbon dioxide infusion-controlled increases the skin temperature. It occurs through a local inflammatory reaction leading dilatation of the cutaneous microcirculation. Methods: Ten patients, 7 females and 3 males, exhibiting skin flaccidity with increase of the subjacent fat, were submitted to carbon dioxide infusion-controlled on the medial portion of the arms and anterior abdominal wall. Measurement of the skin temperature was performed before and after the infusion using a digital thermometer. Results: The mean elevation of the skin temperature after carbon dioxide infusion was 3.48°C. Conclusion: Infusion-controlled carbon dioxide stimulated dilation of the cutaneous micro circulation improving the blood flow with increase of the local temperature.
