Sharpen Blurry Teeth in Photo

I have a single portrait where the upper row of my teeth looks slightly out of focus. Everything else in the shot is perfect, so I only need that small area restored to a natural, sharp appearance without introducing artifacts or over-editing... (Budget: $10 - $30 CAD, Jobs: Adobe Photoshop, Background Removal, Digital Art, Graphic Design, Image Analysis, Image Processing, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)