This is one of those words that doesn't have an "specific" translation. "Cura" is the process of cleaning and dressing a wound or surgical incision. "Cure" is definitely not the translation for it, and "treatment" does not really gives the idea of what is done. Betadine is more of a cleaning solution than a "treatment".

I'll use "cleaning and dressing of wound (or incision)" for the title, and "cleaning with betadine" for the other one.

Examples:

Conditions and Diseases question: What is the value of using betadine solution in cleaning wounds? betadine is the trade name for Povidine-iodine.
wiki.answers.com/.../What_is_the_value_of_using_betadine_solution_in_cleaning_wounds

soak swab with betadine solution. Clean the affected area from the center outwards in a circular pattern. When the betadine solution is ...
www2.cch.org.tw/.../WOUND%20CARE%20DRESSING%20CHANGE.pdf

Si la herida ha sido suturada, aplicaremos una cura seca o con un antiséptico (como el betadine solución) y esperaremos a que la herida esté cicatrizada ...
books.google.com/books?isbn=8479780037...

Respuestas a la pregunta Tengo que hacer una cura de una fisura, ... Lo mejor es lavar con agua y jabón. El betadine en gel o líquido es ...
es.answers.yahoo.com/question/index?qid...

Cuando se cura una herida sólo hay que echar betadine, nada más. .... Mi madre le curaba los puntos con betadine y sin ningún problema. ...
www.servicioshf.com/foros/elle/index.php?topic=3614.0

--------------------------------------------------
Note added at 20 hrs (2009-07-02 16:26:51 GMT)
--------------------------------------------------

You're welcome. Cleansing, of course. I thought about it too after posting my answer.