You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Antral puncture is done through- and explain in detail?
Proof puncture (Antral puncture) 

This procedure involves puncturing the medial wall of the maxillary sinus in the region of the inferior meatus and irrigating the sinus.

Indications
1)   Chronic and subacute maxillary sinusitis with the dual purpose of :

Confirming the diagnosis and
Washing out the pus

2)   To collect the specimen of the antral contents for culture and sensitivity, or cytological examination to exclude early malignancy.
Contraindications

Children less than 12 years of age.
Acute maxillary sinusitis as it may lead to osteomyelitis
Fracture of maxilla as fluid may pass through fracture line.
Diabetes