** Shares of SDI Ltd fall 8.8% to A$1.04, their lowest level since Nov. 24

** Teeth whitener maker's stock fell as much as ~11% earlier in the session, marking its worst intraday drop since mid-January 2022

** Co reports half-yearly sales of A$51.5 million ($31.99 million), down 1.5% on PcP

** Says tooth cavity filler Amalgam's sales plunged 14.6% YoY, overshadowing gains in Europe and Brazil markets and denting overall figures

** Over 293,000 shares change hands, 4.6x the 30-day avg

** Stock last year gained 58.6%

($1 = 1.6098 Australian dollars)

(Reporting by Kumar Tanishk in Bengaluru)

((Tanishk.Kumar@thomsonreuters.com;))