Found this at https://technet.microsoft.com/en-us/library/ms162153%28v=sql.105%29.aspx

Scripting Out the Dependencies for a Database in PowerShell

This code example shows how to discover the dependencies and iterate through the list to display the results.

# Set the path context to the local, default instance of SQL Server.

CD \sql\localhost\default

# Create a Scripter object and set the required scripting options.

$scrp = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Scripter -ArgumentList (Get-Item .)

$scrp.Options.ScriptDrops = $false

$scrp.Options.WithDependencies = $true

$scrp.Options.IncludeIfNotExists = $true

# Set the path context to the tables in AdventureWorks2008.

CD Databases\AdventureWorks2008R2\Tables

foreach ($Item in Get-ChildItem)

{

$scrp.Script($Item)

}