Final answer:
When Raina's teeth moved closer, the fake teeth would need reshaping or replacement to fit properly and maintain proper alignment and bite.
Step-by-step explanation:
As Raina's teeth moved closer together, adjustments to the fake teeth were necessary. In dentistry, when natural teeth shift, existing dental prosthetics like crowns, bridges, or partial dentures may no longer fit properly due to changes in the spacing or alignment of the teeth. Therefore, a dentist may need to reshape or replace the fake teeth to ensure correct alignment and a proper bite. This process could involve grinding down areas of the prosthetics for better fit, or fabricating new ones that accommodate the changed positions of the natural teeth. This is crucial to maintain functionality and aesthetics and to prevent issues like improper bite or difficulty chewing.