title: The use of buccal mucosa graft at posterior cricoid splitting for subglottic stenosis repair.
abstract: BACKGROUND
  Since 1955, when Réthi established the posterior cricoid split augmentation (PCSA) method, several authors have published supporting reports of the validity and proven efficacy of its basic principles. A 27-year prospective, retrospective study.
  
  
  OBJECTIVE
  To report on experience in performing the PCSA method for subglottic and/or posterior-glottic stenosis repair using buccal mucosa interposition grafting at posterior cricoid split and stenting for 8 weeks, and to assess the impact on vocal function.
  
  
  METHODS
  From 1972 on, 60 patients (45 adults, 15 children, aged 8 mo to 72 y) with subglottic and/or posterior-glottic stenosis were operated on using a modified PCSA method. The surgical technique consisted of posterior cricoid splitting, including or not the interarytenoid muscle; wide lateral retraction of the posterior cricoid halves; buccal mucosa interposition grafting and stenting for 8 weeks. The factors evaluated included the subglottic remodeling rate, donor and recipient sites morbidity, time to decannulation, rate of graft take, and phonatory function tests.
  
  
  RESULTS
  The modified PCSA procedure resulted in a decannulation rate of 90%, 18 (30%) of which had further procedure to achieve decannulation, and 6 adult patients (10%) were considered failures because of restenosis. The rate of take of the mucosa graft was 100% in both children and adults, with complete epithelialization of the grafted area, the mucosa not becoming dry and crusty. No interarytenoid muscle division resulted in near-normal to normal glottic voicing. Interarytenoid muscle division determined supraglottic voicing with inspiratory noise and pneumophonic incoordination, breathy and hoarse voice, low fundamental frequency, limited dynamic range, and shortened phonation time.
  
  
  CONCLUSIONS
  The PCSA procedure with buccal mucosa graft is reliable, safe, and highly successful with respect to the graft incorporation and subglottic remodeling. The division or not of the interarytenoid muscle is the most important factor influencing the postoperative vocal function.
authors.affiliation: University of São Paulo Medical School, Brazil. rthome@dialdata.com.br
authors.forename: R
authors.initials: R
authors.lastname: Thomé
authors.forename: D C
authors.initials: DC
authors.lastname: Thomé
authors.forename: M
authors.initials: M
authors.lastname: Behlau
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003413:Cricoid Cartilage / Q000601:surgery*; D005260:Female; D006801:Humans; D007223:Infant; D007828:Laryngoscopy; D007829:Laryngostenosis / Q000209:etiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009061:Mouth Mucosa / Q000637:transplantation; D011183:Postoperative Complications / Q000175:diagnosis; D011446:Prospective Studies; D012189:Retrospective Studies; D013524:Surgical Flaps