title: Prognosis of Deantigenated Equine Bone Used for Bone Augmentation: A Multicenter Retrospective Study on Early and Late Postsurgical Complications in 81 Consecutive Patients.
abstract: OBJECTIVE
  To evaluate the clinical outcome of deantigenated equine bone (DEB) grafts in a series of patients treated with DEB at six months postaugmentation.
  
  
  METHODS
  One hundred DEB grafts were inserted in 81 patients between January 2004 and December 2006. Thirty-two DEBs were blocks and 68 were granules (52 sinus lift and 16 guided bone regeneration [GBR] procedures performed). A total of 147 implants were inserted. A Pearson chi-square test was used to detect any statistically significant correlation between the studied variables and early and/or late failures.
  
  
  RESULTS
  There were 6 early and 26 late graft failures and another 16 failures after prosthesis placement. The overall failure rate was 25% in the GBR procedures, 31.9% in sinus lift, and 54.3% with blocks, for a total complication rate of 39.5%. A statistically significant relation was detected with respect to graft type and early complications (p = .005), with a worse outcome for DEB blocks compared to granules. After provisional prosthesis restoration, 23 implants were lost, and another 41 failed after definitive prosthesis delivery, for an overall failure rate of 43.5%. The follow-up period was 3 years after surgery.
  
  
  CONCLUSIONS
  DEB grafting material had a very high rate of complications. Blocks had more than 50% failures, mainly in the immediate postoperative period. Other procedures such as GBR and sinus lift also showed more than 25% infections and resorption, and late failures (i.e., after-implant placement) were also common. Our results show that DEB is less than ideal for crestal bone reconstruction.
authors.affiliation: Dental School - Department of Periodontology and Implantology, Alma Mater Studiorum - University of Bologna, Bologna, Italy.
authors.forename: Pietro
authors.initials: P
authors.lastname: Felice
authors.affiliation: private practice, Bologna, Bologna, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Piana
authors.affiliation: private practice, Bologna, Bologna, Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Jacotti
authors.affiliation: private practice, Bologna, Bologna, Italy.
authors.forename: Sergio
authors.initials: S
authors.lastname: Di Lallo
authors.affiliation: private practice, Desenzano Del Garda, Italy.
authors.forename: Marzio
authors.initials: M
authors.lastname: Todisco
authors.affiliation: Anatomic Pathology, University of Bologna at Bellaria Hospital, Bologna, Italy.
authors.forename: Maria P
authors.initials: MP
authors.lastname: Foschini
authors.affiliation: Dental School - Department of Periodontology and Implantology, Alma Mater Studiorum - University of Bologna, Bologna, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Checchi
authors.affiliation: University of Ferrara, Ferrara, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Carinci
mesh_terms: D000540:Alveolar Ridge Augmentation / Q000379:methods; D000818:Animals; D003758:Dental Implantation, Endosseous / Q000009:adverse effects / Q000379:methods; D015921:Dental Implants / Q000009:adverse effects; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005500:Follow-Up Studies; D006736:Horses; D011379:Prognosis; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants
keywords: equine bone; failures; graft; preprosthetic surgery