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Deformation at the implant interface to prosthetic superstructure: an interferometric approach
Author(s) -
Wahl Gerhard,
Lang Hermann
Publication year - 2004
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2004.00990.x
Subject(s) - superstructure , implant , materials science , crown (dentistry) , deformation (meteorology) , homogeneous , dentistry , orthodontics , composite material , structural engineering , medicine , mathematics , surgery , engineering , combinatorics
Dental implants are deformed by masticatory forces. These deformations may affect the implant, the prosthetic superstructure or, in particular, the interfaces between the implant and the superstructure. The resulting changes in the geometrical relationships may lead to gap formation in this region. The objective of the present pilot study was to present an interferometric method for the direct recording and quantitative three‐dimensional analysis of load‐induced dynamic implant deformation. Three implant screws of 4.1 mm diameter were loaded using a piezoelectric device. The results showed that the screws itself exhibited a homogeneous deformation pattern, whereas implants with screw‐retained superstructures demonstrated dislocations of the crown and resulting gap formations (0.27±0.37 μm – mean±SD; max: 0.82 μm). The results supported the hypothesis that the high precision of prefabricated abutments is adversely affected by dynamic deformations under functional loading.