Multicenter retrospective analysis of the solid-screw ITI implant for posterior single-tooth replacements.
OBJECTIVE
This report involves the retrospective analysis of ITI implants placed and/or restored by a group of 7 clinicians located throughout the United States (5 periodontists and 2 prosthodontists).


METHODS
Six hundred seventy-five posterior single-tooth implants were restored in 471 patients (average time of loading 21.30 months, with a range of 1 to 78 months). Three hundred seventy implants and 71 implants were placed in mandibular and maxillary molar sites, respectively, and 108 and 126 were placed in mandibular and maxillary premolar sites, respectively.


RESULTS
A cumulative survival rate of 99.1% was obtained for all sites (6 failures). The survival rates for individual sites were as follows: 98.4% mandibular molars, 100% maxillary molars, 100% mandibular premolars, and 100% maxillary premolars. "At-risk" implants (1 to 2 mm of radiographic bone loss) were noted at 5 sites.


CONCLUSIONS
Minimal restorative problems were found with either screw-retained (n = 71) or cemented restorations on solid abutments (n = 600); 80.3% of screw-retained and 98.2% of cemented restorations were free of complications, respectively. Patient satisfaction scores were high (97.4%) as determined by the Patient Satisfaction Questionnaire.


CONCLUSIONS
The data suggest that solid-screw (4.1 or 4.8 mm wide) ITI implants can be a satisfactory choice for posterior single-tooth restorations.
Department of Periodontics, Albert Einstein Medical Center, Philadelphia, Pennsylvania, USA.
Robert A
RA
Levine
Donald
D
Clem
Jay
J
Beagle
Jeffrey
J
Ganeles
Peter
P
Johnson
Gary
G
Solnit
G William
GW
Keller
D001641:Bicuspid; D019250:Dental Implants, Single-Tooth / Q000706:statistics & numerical data*; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data*; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar; D017060:Patient Satisfaction / Q000706:statistics & numerical data; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D014481:United States