title: Relationship Between Long-Term Marginal Bone Loss and Bone Quality, Implant Width, and Surface.
abstract: OBJECTIVE
  Short- or long-term implant survival and success are related to peri-implant marginal bone loss (MBL), among other key factors. The purpose of this study was to analyze the role of clinical and implant-related variables in MBL over a long-term follow-up.
  
  
  METHODS
  A retrospective study of 558 implants in 172 patients was conducted, analyzing the relationship between MBL and clinical, implant-related, and prosthetic design-related variables. MBL was measured on digital radiographs with specific software, using implant threads as reference.
  
  
  RESULTS
  Linear mixed analysis revealed the following significant effects: a lower mean MBL for type IV bone (0.047 mm/year, 95% CI [-0.019, 0.119]) than for type III bone (0.086 mm/year, 95% CI [0.038, 0.138]), type II bone (0.112 mm/year, 95% CI [0.070, 0.167]), or type I bone (0.138 mm/year, 95% CI [0.052, 0.23]); an increased MBL of 0.033 mm/year for each increment of 1 mm in diameter (95% CI [0.002, 0.065]); a lower mean MBL in smooth implants (0.103 mm/year, 95% CI [0.090, 0.117]) vs rough implants (0.122 mm/year, 95% CI [0.102, 0.142]). The mean MBL was > 0 mm/year for all prostheses except for fixed complete dental prostheses.
  
  
  CONCLUSIONS
  Within the limits of a retrospective follow-up study, a lower mean peri-implant MBL was associated with type IV bone, a smaller diameter, a smooth surface, and a fixed complete dental prosthesis.
authors.forename: Cristina
authors.initials: C
authors.lastname: Ibañez
authors.forename: Andrés
authors.initials: A
authors.lastname: Catena
authors.forename: Pablo
authors.initials: P
authors.lastname: Galindo-Moreno
authors.forename: Blas
authors.initials: B
authors.lastname: Noguerol
authors.forename: Antonio
authors.initials: A
authors.lastname: Magán-Fernández
authors.forename: Francisco
authors.initials: F
authors.lastname: Mesa
mesh_terms: D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology*; D015519:Bone Density / Q000502:physiology*; D001851:Bone Diseases, Metabolic; D003442:Crowns; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003824:Denture, Complete; D003828:Denture, Overlay; D003830:Denture, Partial, Fixed; D005500:Follow-Up Studies; D006801:Humans; D008334:Mandible / Q000000981:diagnostic imaging; D008437:Maxilla / Q000000981:diagnostic imaging; D010512:Periodontal Index; D019252:Radiography, Dental, Digital / Q000379:methods; D012189:Retrospective Studies; D012907:Smoking
chemical_list: D015921:Dental Implants