Premium
Cumulative survival rate and complication rates of single‐tooth implant; focused on the coronal fracture of fixture in the internal connection implant
Author(s) -
Cha H.S.,
Kim Y.S.,
Jeon J.H.,
Lee J.H.
Publication year - 2013
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/joor.12065
Subject(s) - dentistry , implant , coronal plane , premolar , molar , medicine , prosthesis , survival rate , dental prosthesis , orthodontics , maxilla , exact test , surgery , radiology
Summary This retrospective study evaluated the 5‐year cumulative survival rate and complication rates of a 4·0‐mm internal connection implant (MicroThread™ Osseospeed™, Astra Tech) installed for single‐tooth restoration. The patients who were treated at Asan Medical Center between 2006 and 2007 were included in this study. A life table analysis was used to calculate the 5‐year cumulative survival rate. Comparisons of cumulative survival rates among implant position (anterior, premolar and molar), jawbone (maxilla, mandible), gender and prosthesis type (screw‐retained, cement‐retained) were performed using the log‐rank test. Post‐loading complications were analysed using Fisher's exact test. Twelve of 136 implants (anterior; 22, premolar; 25, molar; 89) were lost during the loading period, and 11 were removed due to coronal fracture of fixture. The 5‐year cumulative survival rate of the whole arch was 91·9%, and that of the molar region was 87·6%. Statistically significant differences were observed in cumulative survival rates among implant position ( P = 0·037), whereas no statistically significant differences were observed among gender, jawbone, prosthesis type. Forty‐seven of 114 (41·2%) implants in the posterior region showed post‐loading complications, including coronal fracture of fixture and abutment screw loosening.