Roth Orthodontics Roth Philosophy-Based Orthodontic Treatment

A specialized medical procedure that enables us to design the face

Roth Orthodontics sets “facial change” as one of its treatment goals. Using the Ashura statue—a National Treasure in Japan and widely regarded as a symbol of beauty—as an example, we will explain the criteria we use to evaluate facial features.

• We will omit the analysis of the frontal view here, as it utilizes lines connecting the irises of the eyes.

Diagnosis Facial Analysis

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  01

  Ratio of Midface Height to Lower Face Height

  For Asian individuals and women, the ratio of midface height to lower face height is ideally slightly less than 1:1. For individuals of European decent, the ratio is generally close to 1:1.

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  02

  Ratio of Upper Lip to Lower Lip

  For Asian women, a ratio of approximately 1:1.85 is considered favorable. For men, the ratio is approximately 1:2.

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  03

  Protrusion of the Upper and Lower Lips and Chin Position

  Using the Sn-vertical line as a reference, the horizontal positions of the upper lip, lower lip, and chin (the tip of the mandible) are measured. With the upper lip at +5mm, the lower lip at +2mm, and the chin at -5mm, this individual falls within the ideal range.

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  04

  Ratio of Lower Facial Height to Distance from Chin Tip to Neck

  The ratio of lower face height to the distance from the chin tip to the neck is ideally around 1:0.7.

Well Balanced Facial Appearance That Can Be Improved Through Orthodontic Treatment

• Before

  After

  

  01

  Frontal Facial Features

  The nose, lips, and chin (the tip of the mandible) are created by God. Da Vinci kept his painting Mona Lisa with him throughout his life. Was it her enigmatic mouth that continued to trouble him? Orthodontic treatment adds nothing to what the individual was born with.

• Before

  After

  

  02

  Profile

  We understand the temptation to add something to the chin! However, in this case, orthodontic treatment was used to rotate the mandible forward, bringing the chin into a more favorable position and increasing the distance between the neck and the chin. The key is to avoid excessive elongation of the lower facial height.

• Before

  After

  

  03

  Perioral Region

  Prominent canines have long been recognized as a characteristic facial feature among some Japanese individuals. In the 1961 film Breakfast at Tiffany’s, starring Audrey Hepburn, the portrayal of Japanese characters— crooked teeth, glasses, and a camera—reflected the cultural perceptions of that era.

• Before

  After

  

  04

  Tooth Alignment

  The mouth contains teeth that can be compared to beautiful, uncut gems. It is the orthodontist’s role to align them carefully while maintaining harmony with the overall balance of the face.