3x a broken tooth!

You may recall that Elly fell in October and broke her tooth...we took her to the dentist and they put some resin on it and fixed it. We discovered the day we left for SDC (12/12) that Elly had broken her tooth again! It was not bothering her and she had a cleaning appointment scheduled for 12/29 so we waited... She had her tooth fixed again (this time for no charge...hallelujah!) on Monday. We discovered tonight (12/31) that it is broken AGAIN. What the heck?