title: Does the number of implants have any relation with peri-implant disease?
abstract: OBJECTIVE
  The aim of this study was to evaluate the relationship between the number of pillar implants of implant-supported fixed prostheses and the prevalence of periimplant disease.
  
  
  METHODS
  Clinical and radiographic data were obtained for the evaluation. The sample consisted of 32 patients with implant-supported fixed prostheses in function for at least one year. A total of 161 implants were evaluated. Two groups were formed according to the number of implants: G1) ≤5 implants and G2) >5 implants. Data collection included modified plaque index (MPi), bleeding on probing (BOP), probing depth (PD), width of keratinized mucosa (KM) and radiographic bone loss (BL). Clinical and radiographic data were grouped for each implant in order to conduct the diagnosis of mucositis or peri-implantitis.
  
  
  RESULTS
  Clinical parameters were compared between groups using Student's t test for numeric variables (KM, PD and BL) and Mann-Whitney test for categorical variables (MPi and BOP). KM and BL showed statistically significant differences between both groups (p<0.001). Implants from G1 - 19 (20.43%)--compared with G2 - 26 (38.24%)--showed statistically significant differences regarding the prevalence of peri-implantitis (p=0.0210).
  
  
  CONCLUSIONS
  It seems that more than 5 implants in total fixed rehabilitations increase bone loss and consequently the prevalence of implants with periimplantitis. Notwithstanding, the number of implants does not have any influence on the prevalence of mucositis.
authors.affiliation: Department of Implant Dentistry, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Bernardo Born
authors.initials: BB
authors.lastname: Passoni
authors.affiliation: Department of Implant Dentistry, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Haline Renata
authors.initials: HR
authors.lastname: Dalago
authors.affiliation: Department of Implant Dentistry, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Guenther
authors.initials: G
authors.lastname: Schuldt Filho
authors.affiliation: Department of Implant Dentistry, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: João Gustavo
authors.initials: JG
authors.lastname: Oliveira de Souza
authors.affiliation: Department of Surgery, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: César Augusto Magalhães
authors.initials: CA
authors.lastname: Benfatti
authors.affiliation: Department of Periodontics, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Ricardo de Souza
authors.initials: Rde S
authors.lastname: Magini
authors.affiliation: Department of Periodontics, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
authors.forename: Marco Aurélio
authors.initials: MA
authors.lastname: Bianchini
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology; D015921:Dental Implants / Q000009:adverse effects*; D003774:Dental Plaque Index; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects*; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009061:Mouth Mucosa; D052016:Mucositis / Q000000981:diagnostic imaging / Q000209:etiology*; D057873:Peri-Implantitis / Q000000981:diagnostic imaging / Q000209:etiology*; D010512:Periodontal Index; D011859:Radiography; D012307:Risk Factors; D018709:Statistics, Nonparametric; D013997:Time Factors
chemical_list: D015921:Dental Implants