Pulsed oscillation technique for assessing the mechanical state of the dental implant-bone interface.
The sensitivity of a vibrational test for in vivo assessing the interfacial rigidity of a biocompatible dental root implant was studied using models. Aluminium alloy rods of 4 mm diameter and 7 mm long were root implant models. Cyanoacrylate and epoxy adhesives were hard interface models. Soft interfaces were modelled in a soft silicone adhesive, a gel, adhesive tapes and direct loose contact. Blocks of bovine and canine jaw-bones chemically treated and dried were models of a human alveolar bone. It was found that the minimum average thickness of a soft interface layer distinguishable from a hard interface depends on load directions and positions and ranges from 0 to 160 microns. The sensitivity was rather low in the direction for which a normal load was applied to the bone, reflecting a mechanical difference of the surrounding bone and/or the interface. Therefore, it is desirable that the assessment by the vibrational test is done in the direction, too, for which a shearing load is applied to the interface.
Kaneko
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Research Center, Nikon Corporation, Tokyo, Japan.
D000818:Animals; D001672:Biocompatible Materials; D001696:Biomechanical Phenomena; D002417:Cattle; D003722:Dental Alloys; D015921:Dental Implants; D004285:Dogs; D012680:Sensitivity and Specificity; D014732:Vibration
D001672:Biocompatible Materials; D003722:Dental Alloys; D015921:Dental Implants