What is the Difference Between a 'Weak Chin' and Micrognathia/retrognathia and How Do You Know Which One You Have? (photo)

    You can differentiate microgenia from retrognathia or micrognathia by examining the bite and assessing whether there is a jaw deficiency or just a chin deficiency.  An orthodontist should be able to assess this, and cephalometrics may be performed to substantiate this.  Kenneth Hughes, MD Los Angeles, CA

One's dentition is the key to differentiating a weak chin from a weak total lower jaw. But by just looking at your profile any chin concerns you have are not part of a deficient lower jaw but just a weaker chin.