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Sutures of the Skull

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...

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Quantitative Assessment Protocol for Facial Soft Tissue Volumetric Changes with Stereophotogrammetry

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Nasolabial soft tissue changes after Le Fort I advancement.

Sivabalan Vasudavan¹, Yasas S N Jayaratne, Bonnie L Padwa

¹Department of Developmental Biology, Harvard School of Dental Medicine, Children's Hospital Boston, MA, USA.

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons

|January 31, 2012

Summary

Le Fort I advancement surgery alters facial structure, resulting in a lifted nasal tip and a forward-moving upper lip. These changes were observed in patients undergoing this maxillary advancement procedure.

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Area of Science:

Craniofacial surgery
Orthognathic surgery
Plastic surgery

Background:

Le Fort I advancement is a surgical procedure to correct midface discrepancies.
Understanding soft tissue changes is crucial for predicting aesthetic outcomes.

Purpose of the Study:

To quantify nasolabial soft tissue alterations following Le Fort I advancement.

Main Methods:

Prospective study of 37 patients undergoing Le Fort I advancement.
Pre- and postoperative anthropometric measurements of the nasolabial region.
Analysis included nasal length, tip protrusion, nasofrontal angle, and upper lip height.

Main Results:

Nasal length decreased by 1.3 mm; nasal tip protrusion increased by 1.1 mm.
Nasofacial angle decreased by 9.8°; upper lip advanced 4.15 mm.
Upper lip height increased by 0.4 mm; no significant differences between cleft and noncleft patients.

Conclusions:

Le Fort I advancement effectively elevates the nasal tip and advances the upper lip.
Observed changes include reduced nasal length, increased tip protrusion, and decreased nasofrontal angle.
Increased cutaneous upper lip height is likely due to upper lip unfolding.