title: Cone-Beam Computed Tomography Evaluation of Horizontal and Vertical Dimensional Changes in Buccal Peri-Implant Alveolar Bone and Soft Tissue: A 1-Year Prospective Clinical Study.
abstract: OBJECTIVE
  This study evaluated changes in the horizontal and vertical dimensions of the buccal alveolar bone and soft tissue over a 1-year period following implant prosthesis.
  
  
  METHODS
  Thirty-three participants with no history of guided bone regeneration or soft tissue augmentation underwent dental implant placement with different types of connections. The dimensions of the buccal alveolar bone and soft tissue were evaluated immediately and at 1 year after prosthesis from reconstructions of cross-sectional cone-beam computed tomography images.
  
  
  RESULTS
  The vertical and horizontal loss of buccal bone and soft tissue around implants with conical connections were lower than around those with external or internal connections. Statistically significant negative correlations were observed between initial horizontal bone thickness and changes in vertical bone and soft tissue height (p < .05), and between initial horizontal soft tissue thickness and the change in vertical soft tissue height (p < .05).
  
  
  CONCLUSIONS
  Implants with a conical connection preserve peri-implant alveolar bone and soft tissue more effectively than other connection types. Furthermore, the initial buccal alveolar bone and soft tissue thickness around the implant platform may influence their vertical dimensional changes at 1 year after implant prosthesis.
authors.affiliation: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Kaminaka
authors.affiliation: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Tamaki
authors.initials: T
authors.lastname: Nakano
authors.affiliation: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Ono
authors.affiliation: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Tokinori
authors.initials: T
authors.lastname: Kato
authors.affiliation: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yatani
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000000981:diagnostic imaging* / Q000601:surgery; D054893:Cone-Beam Computed Tomography; D003758:Dental Implantation, Endosseous / Q000009:adverse effects*; D005260:Female; D005881:Gingiva / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014716:Vertical Dimension
keywords: abutment design; clinical study; cone beam CT; implants; prei-implant tissue; prospective