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   Offical Journal of The Academy of Osseointegration

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Volume 39 , Issue 2
March/April 2019

Pages 165173

The Effect of Dental Implant Collar Design on Crestal Bone Loss at 1 Year After Implant Placement

Elizabeth Felts Randall, DMD, MS/Ramzi V. Abou-Arraj, DDS, MS/Nico Geurs, DDS, MS/Russell Griffin, PhD/Michael Reddy, DMD, DMSc/Mia Geisinger, DDS, MS

PMID: 30794252
DOI: 10.11607/prd.3516

The aim of this randomized, prospective study was to compare clinical and radiographic outcomes of microtextured implants with two different collar designs at 1 year postplacement. A total of 69 implants were assessed in 58 patients for site, patient-specific, and clinician-experience variables. Overall implant survival was 94.9%. A statistically significant preservation of crestal bone was observed in the microgrooved-collar group. Narrow implant diameter was associated with a statistically significant increase in crestal bone loss. Collar design and implant diameter may be important in limiting adverse esthetic and bone loss outcomes during initial function.

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