Multicenter retrospective analysis of the ITI implant system used for single-tooth replacements: results of loading for 2 or more years.
This report involves the retrospective evaluation of ITI implants placed by a group of 12 clinicians located throughout the United States. Of the original 174 single implants placed in 129 patients reported previously, 157 were examined in 110 patients after 2 or more years (average 40.1 months). Twenty-two implants remained in the anterior and 135 implants (86%) remained in the posterior areas of the mouth, with 81 being restored with an octabutment screw-retained crown and 76 restored with a conical-abutment cemented crown (in function 2 years or longer). Occlusal screw loosening was observed in 22.2% of implants over both periods, with only 1 tooth loosening in both study periods (6 months to 2 years and > or = 2 years). Loosening of a solid conical abutment occurred in 1 additional patient, for cumulative conical abutment loosening of 5.3%. Significant radiographic bone loss was observed around 4 implants, with implant fracture noted with 3 additional implants (all mandibular first molars with hollow-screw or hollow-cylinder implant design). The survival rate at > or = 2 years was 95.5%. The data suggest that ITI implants can be a satisfactory choice for posterior single-tooth restorations.
Levine
R A
RA
Albert Einstein Medical Center, Philadelphia, Pennsylvania 19115, USA. ralperio35@aol.com
Clem
D S
DS
Wilson
T G
TG
Higginbottom
F
F
Solnit
G
G
D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D002484:Cementation; D003442:Crowns; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous; D019250:Dental Implants, Single-Tooth; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D005500:Follow-Up Studies; D006801:Humans; D011859:Radiography; D012189:Retrospective Studies; D013499:Surface Properties; D016019:Survival Analysis