In the Lindenhof series: -Migrations were the main cause of revision. -Diagnosis was not difficult. -Surgery could be delayed until symptoms developed. -Surgery was simple. -Surgical results were highly satisfactory and comparable to those of primary procedures. In the Furlong series: -Ceramic insert breakage was the sole cause of revision. -Diagnosis involved difficulties. -Surgery was simple. -Surgical results were highly satisfactory and comparable to those of primary procedures.
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