using teak was a Z.M.Dagar innovation, starting in the (early I think) 60's. bamboo daands have short life-spans, are susceptible to splitting, so beenkars bought new instruments about every 10 years. in a more hospitable climate (not in India, with its alternating monsoons and dry/hot seasons...) they'd probably last a lot longer, but I'm skeptical they'd last anywhere near as long as hardwood, esp. one as indestructible as teak. I imagine they'd sound considerably different (louder, brighter?) too.