If you look at the different tuskers you can see some real differences regarding the shape of the tusks:
May be a nice moment to show you some examples of these different shapes by showing pictures of tuskers from today and from the past.
1: Classically shaped, with pictures of two tuskers, Masthulele (currently biggest one in kruger) and a well known one from the past Hlanganini.
Hlanganini

Masthulele

2: Both tusks mainly straight curved inwards, with pictures of Nkombo and past tusker Shilowa
Nkombo (one of the tuskers in the shingwedzi region)

Shilowa (died in 1998 and his range was mainly the Mopani region)

Hope you like subjects like this , if so I will show some other shapes later on