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Multivariate analysis of the influence of prosthodontic factors on peri‐implant bleeding index and marginal bone level in a molar site: A cross‐sectional study
Author(s) -
Inoue Masaki,
Nakano Tamaki,
Shimomoto Takuya,
Kabata Daijiro,
Shintani Ayumi,
Yatani Hirofumi
Publication year - 2020
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/cid.12953
Subject(s) - dentistry , implant , abutment , peri , molar , medicine , orthodontics , dental abutments , significant difference , materials science , surgery , civil engineering , engineering
Background Peri‐implant tissue condition can result from prosthodontic, surgical and bacteriological factors. Purpose This study investigated the effects of prosthodontic factors on peri‐implant tissue. Materials and Methods Subjects were 140 patients with 310 implants from Osaka University Dental Hospital. Prosthodontic factors examined were the connection type, the suprastructure retention type, the material of the abutment and the mesiodistal and buccolingual prosthetic form of the superstructure as emergence angle. The objective variables were the modified bleeding index (mBI) and marginal bone level (MBL). Statistical analysis was used as a generalized estimation equation. Results The taper joint had a significantly smaller MBL than the butt joint ( P < .001). There was no significant difference in mBI and MBL between cement and screw retaining. Zirconium and titanium resulted in a significantly smaller mBI than gold alloy (zirconium/gold alloy: P = .037, titanium / gold alloy: P = .021), but there was no significant difference in the MBL. Both mBI and MBL tended to be smaller when the emergence angle was around 20° to 40°, although this difference was not significant. Conclusion As a result of multivariate analysis, our findings suggest that to reduce MBL from the perspective of prosthodontic factors it is preferable to use an implant with a taper joint connection positioned with an emergence angle of 20° to 40°.