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The effect of implant‐abutment junction position on crestal bone loss: A systematic review and meta‐analysis
Author(s) -
Saleh Muhammad H. A.,
Ravidà Andrea,
SuárezLópez del Amo Fernando,
Lin GuoHao,
Asa'ad Farah,
Wang HomLay
Publication year - 2018
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.12600
Subject(s) - dentistry , abutment , coronal plane , medicine , meta analysis , implant , bone remodeling , confounding , orthodontics , nuclear medicine , surgery , radiology , civil engineering , engineering
Purpose To investigate the effect of the apico‐coronal implant position on early and late crestal bone loss (CBL), in bone and tissue level implants. Materials and methods Electronic and manual literature searches were conducted for controlled clinical trials reporting on CBL before and after functional loading of implants. Random effects meta‐analyses were applied to analyze the weighted mean difference (WMD) and meta‐regression was conducted to investigate any potential influences of select confounding factors. Results Fourteen articles were included in the systematic review and 12 were included in the quantitative synthesis. For bone level implants, WMD comparing early CBL in equi and subcrestal placement was 0.15 mm ( P = .18). For analyses of late CBL in bone level implants, equi and subcrestal placement revealed a 0.03 mm WMD ( P = .88). Where in supra and subcrestal placement, WMD was 0.04 mm ( P = .86). The comparison presented considerable heterogeneity between these two arms, where the P value for chi‐square test presented as .006. Finally, for CBL between supra and equicrestal placement, WMD was −0.64 mm ( P < .0001), favoring the supracrestal group. For tissue level implants, WM of early and late CBL in implants placed equi‐crestally was 0.68 ± 0.12 mm and 0.69 ± 0.54 mm, respectively, where for implants placed sub‐crestally, the WM of CBL was 1.72 ± 0.15 mm and 2.26 ± 0.63 mm, respectively. Conclusion Within the limitations of this study, it is recommended to place tissue level implants equicrestally, and bone level implants subcrestally.