title: Periapical surgery using the ultrasound technique and silver amalgam retrograde filling. A study of 71 teeth with 100 canals.
abstract: Periapical surgery using ultrasound allows the treatment of root canals of difficult access, with the sacrifice of little root tissue. As a result, periapical disorders which were condemned to treatment failure in the past can now be dealt with successfully.
  
  
  
  In 71 teeth presenting 100 root canals treated with ultrasound and subjected to retrograde filling with silver amalgam, the course and short-term success of management was evaluated in relation to lesion size, the magnitude of apical resection, and the size of the retrograde filling cavity. The duration of follow-up was one year, with post-treatment controls after 6 and 12 months.
  
  
  
  After 6 months, the percentage clinical and radiological success was 92% and 58%, respectively. One year after periapical surgery the corresponding percentages were 95% and 80%. Global success after 6 months was 63%, versus 84.2% after 12 months. No statistically significant relation was observed between treatment success and the size of the periapical lesion, the amount of apex resected, or the size of retrograde filling.
  
  
  
  Periapical surgery using ultrasound and retrograde filling with silver amalgam affords a high success rate after 12 months.
authors.affiliation: Facultad de Medicina y Odontología, Universidad de Valencia.
authors.forename: Eva
authors.initials: E
authors.lastname: Martí-Bowen
authors.forename: Miguel
authors.initials: M
authors.lastname: Peñarrocha-Diago
authors.forename: Berta
authors.initials: B
authors.lastname: García-Mira
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001047:Apicoectomy / Q000379:methods*; D003723:Dental Amalgam; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010483:Periapical Diseases / Q000601:surgery*; D019233:Retreatment; D012184:Retrograde Obturation / Q000379:methods*; D012189:Retrospective Studies; D014465:Ultrasonics
chemical_list: D003723:Dental Amalgam