title: Humoral immunity host factors in subjects with failing or successful titanium dental implants.
abstract: BACKGROUND
  Treatment with titanium dental implants is in general successful. However, an unknown number of implants do not integrate and are removed either by exfoliation or at the time of second stage surgery. It would be of importance to identify subjects at risk and predict early implant failure.
  
  
  METHODS
  In a retrospective study serum IgG antibody titers and avidity in sera from 40 subjects who had experienced titanium dental implant treatments with non-osseo-integration as the outcome (NOTI) and in sera from 40 age and gender matched control subjects who had received successful titanium dental implants (SOTI) were studied. Serum IgG titers to whole cell Actinomyces viscosus, Bacteroides forsythus, Porphyromonas gingivalis, Staphylococcus aureus, and Streptococcus intermedius sonicated antigen preparations were studied by ELISA.
  
  
  RESULTS
  Serum IgG antibody titers to S. aureus were significantly higher in subjects with SOTI than in NOTI (p<0.001) suggesting that higher titers indicate protection against implant failure as a result of S. aureus infection. Statistically significant higher serum IgG antibody avidity to P. gingivalis and B. forsythus were found in subjects with SOTI than in subjects with NOTI (p<0.01 and p<0.001, respectively). Statistical analysis failed to demonstrate antibody titer or avidity differences to the other pathogens studied. The likelihood that SOTI was associated with a high OD reading for S. aureus was 13.1:1 (p<0.001). Whether subjects were edentulous or not, or if they had lost teeth because of periodontitis or caries did not seem to matter.
  
  
  CONCLUSIONS
  Serum IgG antibodies relative to B. forsythus, P. gingivalis and S. aureus may be associated with the outcome of implant procedures and explain why early implant failures occur.
authors.affiliation: Department of Prosthetic Dentistry, Central Hospital, Skövde, Sweden.
authors.forename: M
authors.initials: M
authors.lastname: Kronström
authors.forename: B
authors.initials: B
authors.lastname: Svensson
authors.forename: E
authors.initials: E
authors.lastname: Erickson
authors.forename: L
authors.initials: L
authors.lastname: Houston
authors.forename: P
authors.initials: P
authors.lastname: Braham
authors.forename: G R
authors.initials: GR
authors.lastname: Persson
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000097:blood*; D000915:Antibody Affinity; D000917:Antibody Formation; D001439:Bacteroides / Q000276:immunology; D016009:Chi-Square Distribution; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D016015:Logistic Models; D008297:Male; D016348:Osseointegration / Q000276:immunology*; D016966:Porphyromonas gingivalis / Q000276:immunology; D016459:Prosthesis-Related Infections / Q000276:immunology / Q000382:microbiology; D012189:Retrospective Studies; D013211:Staphylococcus aureus / Q000276:immunology; D018709:Statistics, Nonparametric; D014025:Titanium
chemical_list: D000907:Antibodies, Bacterial; D015921:Dental Implants; D007074:Immunoglobulin G; D014025:Titanium