Tisse Expanders In Head And Neck: A Retrospective Analysis Of Complication

Objective: to implore the influence of scar, gender, age, implanted location, number and total volume of one implant operation, timing of expansion, repeated expansion and exposure of internalized filling port on the complication incidence of tissue expanders, and analyze the reason for rupture of expanders.Clinical materials and Methods: From 2004. 9 to 2009. 3, 612 expanders in 298 operations were utilized. A retrospective analysis of complications and prognostic factors for complications were done. The factors, concluding scar, gender, age, implanted location, number and total volume of one implant operation, repeated expansion and exposure of internalized filling port, were examined with x~2 test to compare their significance.Results: Incidence of complications has significant differences in scar and non-scar groups (p=0. 01) , location (head, neck and face groups) (p<0. 001) , total volume of one implant operation (more than and less than 400ml) (p=0. 025) and repeated expansion(more than and less than 3 times) (p=0.028), but no significant differences in gender, age, number of one implant operation and timing of expansion groups; infection is significantly high in the patients with exposure of internalized filling port (p=0. 001) ; among the 11 rupturing expanders, 6 expanders locating in the scalp were punctured by the hypertrophic cranial bone spurs.Conclusion: Incidence of complications are relative with scar, location, total volume of one implant operation and repeated expansion, but not gender, age, number of one implant operation and timing of expansion; exposure of internalized filling port will increase the possibility of expander infection; Through a plastic slice integrated firmly with the leaking port, injection of expander will be continued; once implanted more than 3 months, expanders under scalp have the possibility of rupture caused by bone spurs.