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Short communication: Cemented implant reconstructions are associated with less marginal bone loss than screw‐retained reconstructions at 3 and 5 years of loading
Author(s) -
Strauss FranzJosef,
Hämmerle Christoph H. F.,
Thoma Daniel S.
Publication year - 2021
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.13737
Subject(s) - implant , medicine , dentistry , radiography , significant difference , nuclear medicine , surgery
Objectives To analyse whether there is a difference in marginal bone levels (MBL) and the respective changes between cemented and screw‐retained reconstructions at 3 and 5 years of loading. Methods Radiographic data from 14 prospective multicentre clinical trials following implant loading with fixed cemented (CEM) or screw‐retained (SCREW) reconstructions with a 3‐ to 5‐year follow‐up were retrieved from a database. MBL and MBL changes were assessed at initiation of implant loading (BL), at 3 (FU‐3) and 5 years (FU‐5) thereafter. The presence of peri‐implantitis was also determined. Results Data from 1,672 implants at BL, 1,565 implants at FU‐3 and 1,109 implants at FU‐5 were available. The mean MBL amounted to 0.57 mm ( SD 0.87) at BL, 0.55 mm ( SD 0.86) at FU‐3 and 0.65 mm ( SD 1.18) at FU‐5. At FU‐3, the mean MBL was 0.44 mm ( SD 0.65) in group CEM and 0.63 mm ( SD 0.99) in group SCREW showing a significant difference between the groups (intergroup <0.05). At FU‐5, the mean MBL was 0.42 mm ( SD 0.77) in CEM and 0.80 mm ( SD 1.37) in SCREW, again with significant differences between both groups ( p < .05). MBL changes between BL and FU‐3 amounted to 0.11 mm ( SD 1.02) (bone loss) in SCREW and −0.17 mm ( SD 1.03) (bone gain) in CEM. Similarly, mean MBL changes from BL to FU‐5 amounted to 0.23 mm ( SD 1.31) (bone loss) in SCREW and −0.26 mm ( SD 1.27) (bone gain) in CEM. The prevalence of peri‐implantitis amounted to 6.9% in CEM and 5.6% in group SCREW (intergroup p = .29063) at FU‐3. At FU‐5, peri‐implantitis amounted to 4.6% in CEM and 6.2% in group SCREW (intergroup p = .28242). Conclusion Cemented implant reconstructions compared with screw‐retained reconstructions revealed higher marginal bone levels and similar rates of peri‐implantitis during 5 years. The difference in MBL and the respective changes between the two groups, however, appear to be clinically negligible.