{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T18:01:29Z","timestamp":1787508089119,"version":"build-2736575974"},"reference-count":25,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T00:00:00Z","timestamp":1743552000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Background: The lower third of the face plays a crucial role in overall facial harmony, and age-related volume loss in areas such as the pre-jowl region, labiomental folds, and lips can significantly impact esthetic appearance. High-resolution ultrasound is helpful for identifying key structures, such as the facial artery, parotid gland, and masseter muscle, which are critical to avoid during filler injections. Objectives: This article, the final installment in a three-part series on ultrasound-guided facial injections, provides an in-depth analysis of the sonographic anatomy of the lower face, including the mandibular, marionette, and chin regions. Methods: This article outlines step-by-step techniques for ultrasound-guided filler procedures, with a focus on the importance of pre- and intra-procedural scanning to ensure safe and accurate filler placement. Results: By employing techniques like \u201cscan before injecting\u201d and \u201cscan while injecting\u201d, injectors aim to reduce risks such as vascular occlusion, muscle injection, and skin necrosis. Discussion: The use of ultrasound guidance in these regions enhances both esthetic outcomes and patient safety, providing optimal results while minimizing complications. With continued advancements, ultrasound-guided injections will become increasingly precise, enabling more targeted and safer treatments in the lower face.<\/jats:p>","DOI":"10.3390\/diagnostics15070921","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T16:26:31Z","timestamp":1743611191000},"page":"921","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Best Practices for the Use of High-Frequency Ultrasound to Guide Esthetic Filler Injections\u2014Part 3: Lower Third of the Face"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8981-2755","authenticated-orcid":false,"given":"Roberta","family":"Vasconcelos-Berg","sequence":"first","affiliation":[{"name":"Margarethenklinik\u2014University Hospital of Basel, 4051 Basel, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0676-4020","authenticated-orcid":false,"given":"Stella","family":"Desyatnikova","sequence":"additional","affiliation":[{"name":"The Stella Center for Facial Plastic Surgery, Seattle, WA 98101, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paula","family":"Bonavia","sequence":"additional","affiliation":[{"name":"Margarethenklinik\u2014University Hospital of Basel, 4051 Basel, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander","family":"Navarini","sequence":"additional","affiliation":[{"name":"Margarethenklinik\u2014University Hospital of Basel, 4051 Basel, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Cristina","family":"Chammas","sequence":"additional","affiliation":[{"name":"Department of Radiology, School of Medicine, University of S\u00e3o Paulo, S\u00e3o Paulo 05403-010, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5780-4136","authenticated-orcid":false,"given":"Rosa","family":"Sigrist","sequence":"additional","affiliation":[{"name":"Department of Radiology, School of Medicine, University of S\u00e3o Paulo, S\u00e3o Paulo 05403-010, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"446","DOI":"10.1097\/SCS.0000000000009940","article-title":"Analysis of Sexual Dimorphic Features of the Jawline and Chin in White Celebrity Faces","volume":"35","author":"Salinas","year":"2024","journal-title":"J. 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