A few days before Christmas, renowned pianist Joao Carlos Martins summoned his friends to a Sao Paulo bar so he could show off the best gift he had received in decades: a new pair of bionic gloves that are letting the 79-year-old play with both hands for the first time in more than two decades.

Key points: Martins had previously retired after 24 failed surgeries trying to reduce pain from a degenerative disease

Martins had previously retired after 24 failed surgeries trying to reduce pain from a degenerative disease The bionic gloves push his fingers upward after they depress the keys, allowing him to play with nine out of 10 fingers

The bionic gloves push his fingers upward after they depress the keys, allowing him to play with nine out of 10 fingers He now has a goal to perform at New York's Carnegie Hall in October

Considered one of the great interpreters of Johann Sebastian Bach's music, the Brazilian classical pianist and conductor had retired last March after 24 surgeries trying to stop pains from a degenerative disease and a series of accidents.

His limitations had forced him to work mostly as a conductor since the early 2000s.

But since the closing days of 2019, friends have been returning to Martins' downtown penthouse to hear him bring Frederic Chopin, Wolfgang Amadeus Mozart and his favourite, Bach, back to life at his Petrof piano.

Before the gloves — which were specially developed for him — the pianist could only play songs slowly with his thumbs and, sometimes, his index fingers.

"After I lost my tools, my hands, and couldn't play the piano, it was if there was a corpse inside my chest," Martins said

Martins was for decades Brazil's most acclaimed pianist, but an accident and a degenerative disease forced him to stop playing. ( AP: Andre Penner )

He famously rebounded after every setback — nerve damage in his arm inflicted during a soccer match in New York, a mugger hitting him over the head with a metal pipe while he toured in Bulgaria, and more.

But even friends expected the latest surgery, on his left hand, to mark the end of his days on the piano bench.

That might have been his fate, were it not for a designer who believed the pianist's retirement had come too early.

Ubirata Bizarro Costa created neoprene-covered bionic gloves that bump Martins' fingers upward after they depress the keys, which are held together by a carbon fibre board.

"I did the first models based on images of his hands, but those were far from ideal," Costa said.

"I approached the maestro at the end of a concert in my city of Sumare, in the Sao Paulo countryside. He quickly noticed they wouldn't work, but then he invited me to his house to develop the project."

Costa and Martins spent the subsequent months testing several prototypes.

The perfect match came in December, and cost only about 500 Brazilians reals ($173) to build.

'Like a boy who got a new toy'

Now, Mr Martins never takes off his new gloves, even when going to bed.

"I might not recover the speed of the past. I don't know what result I will get. I'm starting over as though I were an eight-year-old learning," he said, joined by his poodle Sebastian.

His dog's name, of course, is a tribute to Bach.

The pianist's return was first reported by the Brazilian newspaper Folha de S.Paulo. Reporter Ricardo Kotscho said Martins hurried to the bar near his home before Christmas "like a boy who got a new toy".

The bionic gloves have changed everything for Martins, allowing him to play with nine out of 10 fingers. ( AP: Andre Penner )

Martins said he has received more than 100 gadgets in the last 50 years as miraculous solutions to his hand problems.

The "extender gloves," as their inventor calls them, gave Martins a goal: Play the piano again at New York's Carnegie Hall in October, when he is scheduled to conduct a concert celebrating the 60th anniversary of his first appearance there.

In the meantime, he is practising early in the morning and late at night, to the delight of his neighbours, until he can interpret an entire Bach concert perfectly.

"It could take one, two years. I will keep pushing until that happens," he said. "I won't give up."

AP