Bill HangDental Practitioner, Lecturer at OrthO2Health

The Case for The Cosmetic Line - William M. Hang DDS MSD

8 May 2013 · 2 min

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1:59

In this lecture segment, Dr. William M. Hang explains the core facial measurement introduced by Dr. John Mew that gauges the proper anteroposterior position of the upper incisors. He provides age‑adjusted formulas for children (21 mm + age in years for females; 23 mm + age for males) and adult normative ranges (36–40 mm for females, 38–42 mm for males). Hang describes how values close to these norms indicate attractive facial proportions, while deviations greater than about 5 mm suggest abnormal growth and may warrant orthotic evaluation. He briefly acknowledges that anatomical variations such as a large nose can affect the measurement, promising further discussion. The tone is instructional with a confident, supportive attitude toward the metric’s clinical utility.

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Courtesy of John Mew, this is the most important measurement that you'll ever have. Measures the proper position of the upper incisors in the face. With this, you can tell someone their child's face is growing well or not well. It's that simple. 21 millimeters plus the patient's age in years for a female, 23 plus the patient's age for a male. For the adults, 36 to 40 for the female, 38 to 42. If you find somebody who has a measurement like this, you will say to yourself, that is an incredibly good-looking male or female. To the degree that the number gets bigger from this, you'll say— your eye will say, wow, not good. So it's— So those of you who do BioBlock or not, This is a huge measurement. And I tried to disprove this whole thing to myself in my career early on when I first heard John speak because I thought, how can he be so smart? It isn't— it can't be true. But every time I'd use it, I'll often look at Deb and I'll just— when I'll measure the number and tell her because she's recording it down for me, I'll just shake my head and she knows what I'm saying. Because this is a really attractive person, and the number is literally on the money. This is the key. If you see a measurement of more than 5 millimeters, there's a range of normal in here. People will say, well, what if you have a big nose? And we'll get into that. Don't worry about the big nose. We'll talk about those noses later. Those are the ones you want to treat, when it's more than 5 millimeters bigger than the number. And you'll see lots of kids will have 8 or 10. So we suggest an orthotic evaluation as soon as you recognize the larger than normal number.