2011
DOI: 10.1515/bmt.2011.026
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Influence of various types of damage on the fracture strength of ceramic femoral heads

Abstract: Ceramic-on-ceramic articulations are a frequently used bearing for total hip replacements. This success mainly is due to their excellent tribological properties. Ceramics can withstand high pressure loads due to its brittleness but only low bending stresses. A ceramic ball head fracture is the result of subcritical crack growth. This kind of fracture in vivo can abet by damage or contamination of the stem cone. The main goal of this work is to provide a risk assessment of different possible damage mechanisms a… Show more

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Cited by 17 publications
(17 citation statements)
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“…Contrary to previous studies [12,23,24], in the present study all damage was caused by actual (in-vitro) head failure and not artificial manipulation of the taper surface (except for cleaning after each fracture test). The shape and number of the ceramic fragments from the low fracture loads matches well with reported in-vivo fractures [10,11,[28][29][30] indicating that the test design reproduced clinical damage of male tapers.…”
Section: Discussioncontrasting
confidence: 85%
See 1 more Smart Citation
“…Contrary to previous studies [12,23,24], in the present study all damage was caused by actual (in-vitro) head failure and not artificial manipulation of the taper surface (except for cleaning after each fracture test). The shape and number of the ceramic fragments from the low fracture loads matches well with reported in-vivo fractures [10,11,[28][29][30] indicating that the test design reproduced clinical damage of male tapers.…”
Section: Discussioncontrasting
confidence: 85%
“…The influence of various contaminants or artificially introduced damage of the taper surface on the fracture strength of ceramic heads has been widely investigated. High correlations between damage and reduced fracture strength have been reported [12,23,24]. The aim of this study was to determine the in-vitro fracture load of new ceramic heads paired with re-used tapers that have been subject to prior head fracture and to evaluate related surface damage.…”
Section: Introductionmentioning
confidence: 99%
“…Only 17% of all patients with a ceramic ball head needed a second revision procedure [ 9 ]. On the basis of mechanical tests [ 8 ] and case reports [ 4 ], it is known that even small damage to or contamination of the stem taper decreases the fracture strength of the ceramic head. In addition, a mismatch between the taper and head may lead to accelerated wear and therefore the need for an earlier revision [ 12 ].…”
Section: Discussionmentioning
confidence: 99%
“…It is well known that a precise match of the taper and the femoral head is crucial to avoid stress in localized areas of the ceramic head [ 4 8 ]. It is generally not recommended to use a ceramic head on an existing taper during revision surgery, because undetected damage in the taper may increase the risk of ceramic fracture [ 4 , 9 11 ].…”
Section: Introductionmentioning
confidence: 99%
“…Tapers are designed for clean and dry assembly conditions. Assembling them in a contaminated situation (blood, bone, water, fat) causes an increase in micro-motion during loading or a reduction in fracture strength of ceramic heads [26,32,37,45,53]. This is the reason why stem tapers should always be carefully cleaned, rinsed, and dried before assembly.…”
Section: Assemblymentioning
confidence: 99%