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Comparative study of shrinkage, inflammatory response and fibroplasia in heavyweight and lightweight meshes.
MedLine Citation:
PMID:  23344668     Owner:  NLM     Status:  Publisher    
PURPOSE: In this manuscript, the authors describe an animal study comparing shrinkage, inflammatory response and fibroplasia in heavyweight (HW-PP) and lightweight polypropylene (LW-PP) meshes. METHODS: Both meshes were fixed on abdominal fascia of 25 Wistar rats (epifascial onlay placement). They were killed at 7, 28 and 90 days to measure the prostheses. Histological analysis was performed with hematoxylin-eosin for cellular counting and immunohistochemistry to measure collagen types I and III. RESULTS: The authors found that the LW-PP mesh presented greater median shrinkage than HW-PP mesh at 7 (P = .036), 28 (P = .674) and 90 days (P = .038) postoperatively. There were more neutrophils on LW-PP mesh (P = .008) at 7 days, gradually diminishing in both prostheses. Lymphocytes were similar between the implants at 7 days, diminishing about 50 % on LW-PP mesh (P < .001) at 90 days. Macrophages and giant cells diminished on LW-PP and increased on HW-PP meshes (P < .001). Collagen I/III ratio presented a progressive, almost fivefold rise at 90 days, on both mesh types (P < .001). The collagen I/III ratio was similar between LW-PP and HW-PP meshes at the three times studied. CONCLUSIONS: It is concluded that LW-PP showed more shrinkage than HW-PP mesh at 7 and 90 days, despite the fact that HW-PP presented more lately foreign body reaction. The collagen I/III ratio was similar between the prostheses and increased during the postimplant period.
L Zogbi; E N Trindade; M R M Trindade
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-24
Journal Detail:
Title:  Hernia : the journal of hernias and abdominal wall surgery     Volume:  -     ISSN:  1248-9204     ISO Abbreviation:  Hernia     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9715168     Medline TA:  Hernia     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Programa de Pós-Graduação em Cirurgia, Universidade Federal do Rio Grande do Sul (UFRGS), Ramiro Barcelos Street 2400, 90035-003, Porto Alegre, RS, Brazil,
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