Nicholas Gough, 59, attacked his wife Lynne in their garden gazebo after drinking a bottle of wine.
The ‘possessive’ science teacher swore at the 52-year-old and held her down on the floor. He then sank his teeth into the end of her nose, leaving her face pouring with blood.
After the attack, Gough tried to persuade his wife to blame the injury on their pet.
Instead she reported him to the police and yesterday he was jailed for five years after admitting wounding with intent.
Sentencing him at Wolverhampton Crown Court, Judge Martin Walsh said the attack had left his wife ‘disfigured’ for life.
‘You grabbed her by the throat and tried to kill her,’ he said. ‘She has had to have three operations and required plastic surgery.’
Mrs Gough watched in the public gallery surrounded by family as the sentence was passed. Neither she nor her former husband showed any emotion as the sentence was handed out.
The couple had been married for 24 years and had three children together, as well as three others between them from previous relationships, the court heard.
Gough was a ‘well respected’ teacher of science at the West Bromwich Phoenix Collegiate Academy, and also worked as a volunteer for the NHS in his spare time.