title: A 3-year multicenter study of marginal bone level and soft tissue health of a 1-piece implant.
abstract: OBJECTIVE
  The study evaluated 1-piece implants in daily clinical situations.
  
  
  METHODS
  One-piece implants restoring both single teeth and partially edentulous sites were included. A single-stage procedure was used with immediate provisionalization within 24 hours after surgery. The definitive prosthesis was delivered within 6 months of implant insertion.
  
  
  RESULTS
  One hundred fifteen implants have been placed in 84 patients at 4 centers. Two implants failed resulting in a cumulative survival rate of 98.3%. Normal periimplant mucosa and no visible plaque were observed in most of the implants. The soft tissue papilla scores improved considerably over time P < 0.001. Patient assessment improved significantly from implant insertion to the 3-year visit, P < 0.001. The mean bone level at implant insertion, 6-month, and 1-, 2-, and 3-year visits was 0.42, -0.58, -0.69, -0.80, and -0.66 mm, respectively. The mean change in bone level from implant insertion to 6 months and 1, 2, and 3 years was reported as -1.02, -1.12, -1.26, and -1.07 mm, respectively.
  
  
  CONCLUSIONS
  The results indicate that this implant has the ability to preserve both hard and soft tissues' architecture.
authors.affiliation: University Associates in Dentistry, 222 N. LaSalle, #230, Chicago, IL 60601, USA. rabaer@uadchicago.com
authors.forename: Russell A
authors.initials: RA
authors.lastname: Baer
authors.forename: Richard
authors.initials: R
authors.lastname: Shanaman
authors.forename: Paul K
authors.initials: PK
authors.lastname: Clark
authors.forename: Michael
authors.initials: M
authors.lastname: Medley
mesh_terms: D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000473:pathology*; D000540:Alveolar Ridge Augmentation / Q000379:methods; D015921:Dental Implants; D003773:Dental Plaque / Q000145:classification; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D005881:Gingiva / Q000473:pathology*; D005884:Gingival Hemorrhage / Q000145:classification; D006801:Humans; D057893:Immediate Dental Implant Loading; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D017060:Patient Satisfaction; D011446:Prospective Studies; D011788:Quality of Life; D011859:Radiography; D016019:Survival Analysis; D020390:Tooth Socket / Q000601:surgery
chemical_list: D015921:Dental Implants