Social security pension reinstatement denied due to procedural violation of res judicata regarding prior final judgment.

The Supreme Court quashed the appellate court's decision reinstating a social security pension for a partial work disability. The appellant argued that the lower court correctly applied the 18-month rule for reinstating benefits after a disability ended. However, the Supreme Court found the appellate court violated the principle of res judicata by ignoring a final judgment from 2003 that had already ruled the disability had ceased. Consequently, the court held that the lower court could not reopen the case to determine a new disability status within the 18-month window established by the final judgment.