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A cross-sectional study on the prevalence of marginal bone loss among implant patients

Artikel i vetenskaplig tidskrift
Författare D. Cecchinato
A. Parpaiola
Jan Lindhe
Publicerad i Clinical Oral Implants Research
Volym 24
Nummer/häfte 1
Sidor 87-90
ISSN 0905-7161
Publiceringsår 2013
Publicerad vid Institutionen för odontologi
Sidor 87-90
Språk en
Länkar dx.doi.org/10.1111/j.1600-0501.2012...
Ämnesord clinical assessment, diagnosis, epidemiology, statistics, 14-year follow-up, controlled clinical-trial, fixed partial dentures, 9-year, rehabilitation, periodontitis, multicenter, diseases, lesions
Ämneskategorier Odontologi

Sammanfattning

Objective The aim of the present cross-sectional retrospective study was to determine bone loss in a sample of subjects restored with implant-supported prostheses and the prevalence and severity of peri-implantitis in a sub-sample. Material and methods A total of 139 patients who had attended a follow-up visit in 2007 were considered for inclusion. Subjects with implants that had been in function for less than 3 years or had poor quality radiographs were excluded. The final study population comprised 133 subjects with a total of 407 implants. Radiographic measurements identified subjects who had =1 implant site exhibiting marginal bone loss of >0.5 mm; 40 subjects met this criterion and were recalled for a clinical examination. Of the 40 subjects that were recalled for the clinical examination, 30 attended. The following parameters were recorded at mesial, distal, buccal, and lingual/palatal aspects of all implants: oral hygiene standard (plaque), bleeding on probing, probing pocket depth (PPD). Results The mean interval between the baseline (1-year post-loading) and the follow-up radiographs was 4.8 +/- 2.3 years. In the total subject sample (133 subjects and 407 implants), the mean amount of marginal bone loss that had occurred was 0.2 +/- 1.2 mm. Ninety-three subjects with 246 implant sites exhibited no bone level alteration (group A), whereas 40 subjects with 161 implant sites (group B) displayed marginal bone loss of >0.5 mm at =1 implant (loser site). Sixty-eight implant sites in group B exhibited bone loss of >0.5 mm. However, only 20% of subjects and 11% of sites had lost >1 mm marginal bone, and 8% of subjects and 4% of sites had lost >2 mm bone. The total amount of bone loss that had occurred in group B was (i) 0.88 +/- 1.5 mm and (ii) among the loser sites 2.1 +/- 1.4 mm. Thirty subjects from group B were exposed to a clinical examination; out of 37 sites with bone loss >0.5 mm in this subgroup, 29 sites had a PPD value of =4 mm. Conclusion Marginal bone loss (>0.5 mm) at implants was observed in 30% of subjects and 16% of implant sites. More advanced loss of marginal bone occurred in much fewer subjects and sites. Sites with marginal bone loss was in the sub-sample characterized by bleeding on probing, but only occasionally with deep (=6 mm) pockets.

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