title: Stability of implants placed in fresh sockets versus healed alveolar sites: Early findings.
abstract: OBJECTIVE
  The present study measured implant stability quotient (ISQ) values at three different time points after surgical procedures to compare whether the stability values differed between implants placed in fresh extraction sockets versus healed alveolar sites.
  
  
  METHODS
  To measure implant stability, resonance frequency analysis (RFA) was performed in 77 patients (53 women, 24 men) with a total of 120 dental implants. These implants were divided into two groups: Group 1 included 60 implants in healed alveolar sites (22 in the maxilla, 38 in the mandible), and Group 2 included 60 implants in fresh sockets (41 in the maxilla, 19 in the mandible). Implant stability was measured immediately at implant placement (baseline), 90, and 150 days later. Statistical analysis was made using a multivariate regression linear model at implant level (α = 0.05).
  
  
  RESULTS
  Overall, the means and standard deviations of the ISQ values were 62.7 ± 7.14 (95% confidence interval [CI], 39-88) at baseline, 70.0 ± 6.22 (95% CI, 46-88) at 90 days, and 73.4 ± 5.84 (95% CI, 58-88) at 150 days. In Group 1, the ISQs ranged between 64.3 ± 6.20 and 75.0 ± 5.69, while in Group 2, presented lower values that ranged between 61.2 ± 8.09 and 71.9 ± 5.99 (P = 0.002). Anatomic location and times periods were the only identified variables with an influence on ISQ values at implant level (P < 0.0001).
  
  
  CONCLUSIONS
  The stabilities of the implants placed in the fresh sockets and in healed sites exhibited similar evolutions in ISQ values and thus osseointegration; however, the implants in the healed alveolar sites exhibited superior values at all time points.
authors.affiliation: Biotecnos Research Center, Santa Maria, Brazil.|Catholic University of Uruguay, Montevideo, Uruguay.|Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Guarulhos, Brazil.
authors.forename: Sergio Alexandre
authors.initials: SA
authors.lastname: Gehrke
authors.affiliation: Postgraduate Program - Implantology, APCD, Jundiaí, Brazil.|Leopoldo Mandic University, Campinas, Brazil.
authors.forename: Ulisses Tavares
authors.initials: UT
authors.lastname: da Silva Neto
authors.affiliation: Private Practice, Bauru, Sao Paulo, Brazil.
authors.forename: Paulo Henrique Orlato
authors.identifier: http://orcid.org/0000-0002-0868-6022
authors.initials: PH
authors.lastname: Rossetti
authors.affiliation: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Guarulhos, Brazil.
authors.forename: Sidney Eiji
authors.initials: SE
authors.lastname: Watinaga
authors.affiliation: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Guarulhos, Brazil.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Giro
authors.affiliation: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Guarulhos, Brazil.
authors.forename: Jamil Awad
authors.initials: JA
authors.lastname: Shibli
mesh_terms: D000539:Alveolar Process / Q000601:surgery*; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000601:surgery; D016348:Osseointegration; D020390:Tooth Socket / Q000601:surgery*
chemical_list: D015921:Dental Implants
keywords: dental implant; fresh extraction sockets; implant stability; longitudinal studies; resonance frequency analysis