Use of composite prostheses in the repair of defects in the abdominal wall: prosthetic behaviour at the peritoneum.
OBJECTIVE
To compare the behaviour of two composite biomaterials in rabbit peritoneum.


METHODS
Animal study.


METHODS
Faculty of Medicine, University of Alcalá, Spain.


METHODS
14 white New Zealand white rabbits divided into 2 groups of 7 each.


METHODS
Defects (7 x 5 cm) involving all the layers of the abdominal wall were created and repaired using Parietex Composite or Vypro prostheses. Fourteen days after implantation, prosthetic specimens were examined by microscopy, and morphometric and biomechanical analysis.


METHODS
Infection, healing, development of adhesions, and histological appearance of the interface.


RESULTS
Firm adhesions were detected after the implant of Vypro while adhesion were loose in the Parietex group. The mean (SD) prosthetic surface area covered by adhesions was significantly greater in the Vypro group 22.3 (2.8) compared with 0.2 (0.02), p <0.01). The neoperitoneum formed after the implant of Parietex was well-organised and homogeneous and covered by a typical mesothelium, while in the Vypro it was disorganised, with a rough texture composed of prosthetic filaments and nodes. The neoperitonum was thicker in the Parietex group 154.0 (5.4) compared with 50.8 (2.3), p <0.05) while higher biomechanical resistance values were recorded in the Vypro group 30.4 (1.9) compared with 15.0 (2.73), p <0.05).


CONCLUSIONS
While both biomaterials integrated well with tissue, Parietex behaved better at the peritoneal interface.
Bellón
J M
JM
Department of Morphological Sciences and Surgery, Faculty of Medicine, University of Alcalá, Madrid, Spain. juanm.bellon@uah.es
García-Honduvilla
N
N
Jurado
F
F
García-Carranza
A
A
García-Moreno
F
F
Martín
A C
AC
Buján
J
J
D000818:Animals; D020099:Coated Materials, Biocompatible; D005990:Glycerol; D008855:Microscopy, Electron, Scanning; D010537:Peritoneum / Q000502:physiology* / Q000601:surgery*; D011091:Polyesters; D011095:Polyethylenes; D011098:Polyglactin 910; D011126:Polypropylenes; D011183:Postoperative Complications; D019736:Prostheses and Implants; D011817:Rabbits; D018709:Statistics, Nonparametric; D000267:Tissue Adhesions / Q000209:etiology; D014945:Wound Healing / Q000502:physiology*
D020099:Coated Materials, Biocompatible; D011091:Polyesters; D011095:Polyethylenes; D011126:Polypropylenes; D011098:Polyglactin 910; D005990:Glycerol