title: Prospective study of two retrograde endodontic apical preparations with and without the use of CO2 laser.
abstract: This article covers a 4-year study that reports 320 cases in which endodontic surgery was performed for residual apical lesions or lesions that could not be treated in a conventional way. Four groups of 80 teeth each were formed and they were followed up after a 12-month interval. The first group comprised cases treated with a micro bur, retrograde filling and IRM; the second, cases treated at the apical and radicular portions with a CO2 laser; the third, cases in which the retrograde cavity was prepared with an ultrasonic device instead of a micro bur; and the fourth group comprised cases treated in a similar way to the second group, i.e., cases treated at the apical and radicular portions, but with a CO2 laser instead of a micro bur. After 12 months, the results showed a better prognosis with ultrasonic treatment. Regardless of technique, the CO2 laser did not improve the healing process.
authors.affiliation: Service de chirurgie buccale, Centre Hospitalier Régional Universitaire de Rennes, France.
authors.forename: G
authors.initials: G
authors.lastname: Bader
authors.forename: S
authors.initials: S
authors.lastname: Lejeune
mesh_terms: D000293:Adolescent; D000328:Adult; D003723:Dental Amalgam; D006801:Humans; D053685:Laser Therapy / Q000379:methods*; D008768:Methylmethacrylates / Q000008:administration & dosage; D008875:Middle Aged; D011182:Postoperative Care; D011446:Prospective Studies; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000379:methods*; D019227:Tooth Apex / Q000601:surgery*; D015034:Zinc Oxide / Q000008:administration & dosage; D015035:Zinc Oxide-Eugenol Cement / Q000008:administration & dosage
chemical_list: D008768:Methylmethacrylates; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C031667:IRM cement; D003723:Dental Amalgam; D015034:Zinc Oxide