ATHLETICS: Sally Pearson will have to defend her Olympic 100m hurdles crown next year with a new starting technique following her sickening compound fracture in Rome.

Pearson says she is still a month or two away from making a competitive comeback from her badly broken wrist and, when she does, the sprint queen will also face a fresh challenge out of the blocks.

The complicated surgery to repair two shattered bones and a dislocated wrist has left Pearson unable to push off in the same manner that has helped the 29-year-old forge one of the great Australian track careers.

Pearson has spent several months since her nasty fall in June regaining strength and flexibility in her left hand and admits it's been difficult at times adjusting to a foreign starting technique.

"It's funny; last week it was horrible but this week I felt great," Pearson told AAP on Wednesday after the unveiling of a life-sized wax statue of her in Sydney.

Pearson edged out American Dawn Harper by two hundredths of a second in a tense photo finish to clinch her gold medal in London and when asked if she was concerned that she may lose critical time out of the blocks, said somewhat unconvincingly: "I don't think so".

"It's just a matter of my body getting used to the new position."

Despite feeling ahead of schedule compared to this time last year, Pearson also still has no clear timeframe for a return to racing.

She has been earmarked to make her comeback over the barriers at the Canberra Track Classic on February 20, but the Queenslander isn't admitting as much if she is.

"I'm just doing the hard yards - November and December is really tough - and my coach will let me know when he wants me to race," Pearson said.

"I feel really good but it's still probably a month or two away."

No woman has ever won back-to-back Olympic gold medals in the 100m hurdles, but Pearson insists her injury setback won't hinder her shot at history in Rio de Janeiro.

"I feel ahead of schedule to where I was this time last year and really good about next year and I'm just waiting for my coach to let me know my schedule," Pearson said.

"Having won before I think I'll be more relaxed, not so intense."

Pearson will be a permanent fixture at the all-new Sports Zone at Darling Harbour courtesy of a Madame Tussauds tribute.