Özet:

Objectives: The aim of this study is, toinvestigate the effects of crown length-implantlength ratios, implant diameters implant types andfollow-up periods of patients on the marginal boneloss in the implant-supported restorations.Materials and Methods: The lengths of dentalimplants were measured on the orthopantographsthat were taken after implantation and afterrestoration at the follow-up of 61 implant-supportedrestoration restorated in Erciyes University Facultyof Dentistry. The magnification ratio of radiographswas calculated with the measured lengths ofimplants and the real lengths of implants. Then,averages of mesial and distal marginal bone levelswere measured with reference to the implant neck.The differences between the marginal bone levels(magnification ratios were taken into account) thatwere measured from first and secondorthopantographs were noted. Finally, the effects ofcrown length-implant length ratio, implantdiameter, implant type and follow-up periods on themarginal bone loss were evaluated.Results: The effects of diameter of implant,type of implant and follow-up period of implantsupported restorations on the marginal bone losswere not statistically significant (p>0.05). Theimplants that have crown length-implant lengthratio above 1 showed more marginal bone loss thanthe implants that have crown length-implant lengthratio below 0.5. And this difference was statisticallysignificant (p=0.006). Marginal bone loss values ofall subgroups were within clinically acceptablelimits.Conclusion: As a result of this study, ratio ofcrown length-implant length, implant diameter,implant type and follow-up periods of implantsupported restoration cause bone loss withinacceptable limits.

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