title: The radiographic bone loss pattern adjacent to immediately placed, immediately loaded implants.
abstract: OBJECTIVE
  The purpose of this study was to evaluate radiographic bone levels adjacent to implants placed in fresh extraction sockets (ESs) and immediately loaded with a fixed full-arch provisional restoration compared to bone levels adjacent to implants placed in native bone (NB) under the same restorative conditions.
  
  
  METHODS
  Patients with a hopeless maxillary and/or mandibular dentition had their remaining teeth extracted and 6 to 8 implants placed and restored within 72 hours. Radiographs were obtained at time 0, 3 to 6 months, and annually for 5 years. The radiographs were digitized, and the bone level changes were measured using a computer-assisted method.
  
  
  RESULTS
  A total of 139 implants, 42 ES and 97 NB, placed in 17 patients were evaluated. The overall results indicated that for all implants (ES + NB), 0.60+/-0.71 mm of bone was lost after 6 months; 1.17 +/-0.59 mm of bone was lost after 18 months; 0.87+/-0.76 mm bone was lost after 36 months; and 1.35 +/-0.42 mm of bone was lost after 60 months. When stratifying for NB versus ES implants, it was found that for NB implants, 0.75+/- 0.21 mm of bone was lost after 6 months; 1.31 +/- 0.91 mm of bone was lost after 12 months; 1.07+/-0.21 mm of bone was lost after 36 months; and 1.45 +/- 0.49 mm of bone was lost after 54 months. For ES implants, 0.14 +/-0.33 mm of bone was lost after 6 months; 1.02 +/-0.27 mm of bone was lost after 12 months; 0.86+/-0.42 mm of bone was lost after 36 months; and 1.30 +/-0.48 mm of bone was lost after 54 months.
  
  
  CONCLUSIONS
  The combination of ES and NB implants can be immediately loaded with a fixed full-arch prosthesis and remain stable for greater than 5 years. The bone loss adjacent to these implants is similar to that seen surrounding those placed and restored using traditional protocols.
authors.affiliation: jaffin1@optonline.net
authors.forename: Robert
authors.initials: R
authors.lastname: Jaffin
authors.forename: Matthew
authors.initials: M
authors.lastname: Kolesar
authors.forename: Akshay
authors.initials: A
authors.lastname: Kumar
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ishikawa
authors.forename: Joseph
authors.initials: J
authors.lastname: Fiorellini
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology*; D003758:Dental Implantation, Endosseous / Q000009:adverse effects* / Q000379:methods*; D015921:Dental Implants / Q000009:adverse effects*; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects*; D003799:Dental Stress Analysis; D003825:Denture, Complete, Immediate / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011857:Radiographic Image Interpretation, Computer-Assisted; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D020390:Tooth Socket / Q000601:surgery
chemical_list: D015921:Dental Implants