Two Front Teeth with Crowns, One Crown is Cracked. Do I Replace Both?

I have 2 front crowns on my front teeth. The teeth was done 23 years ago. The 1st dentist cut the teeth too close to the nerves. My crowns are shaded 2m1 and adjecent teeth are 2L15. I do not have eye teeth but my teeth are streight because of braces I had years ago. I want the shading to be right hopefully without bleaching. Should I have both front teeth crowns at the same time? I don't want another root canel on the other tooth and I want to keep my teeth as long as possable. Thank you,