A-10 surgery

---

A-10 surgery (Japanese: A点手術) is a minimally invasive facial reconstructive procedure developed by Japanese dentist, implant specialist, and orthodontic specialist Koji Yamamoto. The technique is designed to address midface depression, alar base retrusion, and an acute nasolabial angle by fixing titanium plates at the anatomical Point A and the alar base, combined with soft-tissue augmentation using an artificial dermis.

Development

The procedure originates from the Point A-Koji method, first reported by Yamamoto in 2022 as a technique that advances the subnasal soft-tissue point (Sn) through titanium fixation at Point A, the deepest part of the anterior maxilla. In 2024, Yamamoto introduced a modified version of the procedure, called the modified A-10 surgery. This version incorporates a three-plate titanium system together with artificial dermis (Terudermis) to reinforce both midfacial projection and alar base thickness. This modification allows three-dimensional correction of the midface and provides measurable improvements in facial convexity and nasolabial angle.

Technique

The operation is performed under local anesthesia using an intraoral approach. After dissecting the gingival mucosa along the maxillary buccal junction, pre-bent titanium plates are fixed between the lower edge of the piriform aperture and the maxillary alveolar bone. In the modified version, **three titanium plates** are employed — one central plate at Point A and two lateral plates near the alar base. An artificial dermis layer is inserted between the plate and bone to promote soft-tissue regeneration and maintain long-term volume.

Applications

A-10 surgery is used for aesthetic correction of midface flattening, alar base retrusion, and a narrow nasolabial angle, particularly in Asian patients whose facial structure tends to be less projecting. It has also been discussed as a potential minimally invasive option for age-related changes such as piriform aperture enlargement and nasal base depression.

Patent

The method was patented in the United States as a “surgical method for changing a nasolabial angle” based on titanium plate fixation at the maxilla.

Academic recognition

The A-10 surgery and Point A-Koji method are cited in the reference text Maxillofacial Anatomy (Springer Nature, 2024) within the chapter "Ethnicity and Gender Differences." The chapter notes their relevance as minimally invasive approaches for altering midfacial skeletal profiles.

References

Primary sources

• Yamamoto K, Fukushima K. "Novel Approach for Midface Depression." Plastic and Reconstructive Surgery – Global Open. 2022; 10:e4242. DOI:10.1097/GOX.0000000000004242
• Yamamoto K. "Novel Approach for Midface Attractiveness." Plastic and Reconstructive Surgery – Global Open. 2022; 10:e4632. DOI:10.1097/GOX.0000000000004632
• Yamamoto K. "A Novel Approach for Improving Midface Aesthetics: A Pilot Study." Plastic and Reconstructive Surgery – Global Open. 2024; 12:e6260. DOI:10.1097/GOX.0000000000006260

Secondary sources

• Nazari A. (2024). "Ethnicity and Gender Differences." In: Maxillofacial Anatomy. Springer Nature. Living reference work entry, pp. 1–151. First Online: 21 December 2024. DOI: 10.1007/978-3-031-36962-9_284-1

Patent

• Yamamoto K. "Surgical Method for Changing a Nasolabial Angle." United States Patent US 12,440,254 B2, issued Oct 14 2025.

See also

• Maxillofacial surgery
• Nasolabial angle
• Facial reconstruction

This article "A-10 surgery" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:A-10 surgery. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.

📰 Article(s) of the same category(ies)

• Doctor handwriting
• Pap-Ion Magnetic Inductor
• Physiological reserve
• Transplant Benefit Score
• Eugenic marriage laws
• Individualized Quality Control Plan
• Clock drawing task

---