Temple hollowing is a common age-related change that significantly affects facial harmony. Loss of temporal volume creates a concave contour, accentuates skeletal prominence, and disrupts the smooth transition between the forehead, temple, and lateral cheek. Hyaluronic acid (HA) fillers offer a powerful non-surgical solution, but the temple is one of the highest-risk injection sites due to its dense vascular network, variable anatomy, and proximity to critical neurovascular structures.
Injectors must appreciate these nuances to avoid complications such as vascular occlusion, blindness, or compartment effects. Cotofana et al. (2020) described six anatomically distinct injection techniques for the temple, mapping the clinical anatomy and danger zones associated with each, and establishing the framework that underpins safe modern practice in this region. For structured training on temporal anatomy and injection safety, the Acquisition Aesthetics curriculum covers these principles across all training levels.
The temple is composed of several layers, each with unique structural and clinical implications:
Understanding these layers is essential because HA filler behaves differently depending on the plane of injection, and the major vascular structures are concentrated in the superficial layers — making depth selection the primary determinant of safety.
The superficial temporal fat pad lies between the skin and the superficial temporal fascia. It is thin, highly vascular, and prone to irregularities if injected superficially. Ageing causes deflation and descent of this fat pad, contributing to temple hollowing and loss of lateral facial support.
Superficial injections in this layer carry a higher risk of:
For these reasons, superficial HA filler placement in this layer is generally avoided unless using very low-viscosity products with a cannula.
Surek (2021) described the intermediate temporal fat pad (ITFP) as an anatomically distinct compartment located between the superficial temporal fascia and the deep temporal fascia, distinct from both the superficial fat pad above and the deep temporal fat compartments below. Using cadaveric dissection and ultrasound guidance in 20 hemifacial specimens, Surek demonstrated that the ITFP can be reliably identified and injected with accuracy, representing a potential intermediate injection target for practitioners who wish to avoid both the most vascular superficial plane and the deeper supraperiosteal plane.
This anatomical work aligns with the interfascial technique published by Lee, Park, and Yang (2022), who used Doppler ultrasonography to identify the space between the superficial temporal fascia and the deep temporal fascia as a relatively safe injection plane for HA filler, confirming product placement with ultrasound in a clinical series and demonstrating predictable, symmetric augmentation without major adverse events.
Deep to the deep temporal fascia lie the deep temporal fat pads — structurally stable, less vascular, and capable of supporting the lateral brow and upper face. These compartments include an upper and lower division and are suitable for volumisation with high G′ fillers.
Cotofana et al. (2020) identified the supraperiosteal and deep temporal fat techniques as having the most favourable safety profiles among the six injection planes analysed, confirming that the deep plane provides natural contouring with a lower risk of vascular injury.
The temple contains several major vessels, making it one of the highest-risk areas for HA filler injection.
Chen et al. (2021) used three-dimensional CT scanning to map the temporal vessels in cadaveric specimens, providing objective vascular distribution data for each injection plane. Their analysis confirmed that the superficial planes carry the greatest arterial density, and identified safety margins for deep injection that support the anatomically guided deep temporal protocols described in contemporary practice.
The catastrophic potential of STA injury was reviewed in detail by Beleznay et al. (2019), whose updated global literature review confirmed that the temporal and glabellar regions are among the highest-risk injection zones for retrograde embolisation and vision loss. Their data reinforce that anatomical plane selection — not aspiration alone — is the primary safeguard in the temple.
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Technique considerations:
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Technique considerations:
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Technique considerations:
The temple is a confined anatomical space. Overly hydrophilic fillers can cause pressure effects, compartment compression, and vascular compromise. Products designed for volumisation in structurally stable deep planes should have controlled swelling profiles to avoid post-injection swelling within a bounded compartment.
Understand the typical course: anterior to the tragus, ascending vertically, branching into frontal and parietal divisions. Its precise course is highly variable — Doppler ultrasound before injection is strongly recommended when available.
The temple is a tight compartment. Overfilling increases pressure and vascular risk. Inject incrementally across sessions rather than large volumes in a single pass.
High injection pressure significantly increases the risk of intravascular placement and retrograde embolic spread. Slow, low-pressure technique is non-negotiable in the temple.
Aspiration is unreliable in this region due to vessel collapse and negative pressure artefact. It should not be substituted for anatomical knowledge and careful technique.
Immediate intervention is essential if symptoms arise. All injectors working in the temple must be trained in recognition and management of vascular occlusion and visual compromise.
• The temple is a multilayered region with distinct fat compartments and a highly vascular superficial plane. Six anatomically distinct injection planes have been defined, each with different risk profiles (Cotofana et al., 2020).
• Deep temporal fat compartments and the supraperiosteal plane are the safest and most predictable for HA volumisation. The interfascial plane between the STF and DTF is an emerging alternative with a favourable vascular distance (Lee, Park & Yang, 2022).
• The intermediate temporal fat pad represents a further anatomical target with ultrasound-confirmed accuracy of injection (Surek, 2021).
• CT vascular mapping confirms the superficial planes carry the greatest arterial density in the temporal region. Safety margins for deep injection have been anatomically validated (Chen et al., 2021).
• The STA is the primary vessel of concern. Retrograde embolisation from temporal injections can result in visual loss. Anatomical plane selection is the primary safeguard (Beleznay et al., 2019).
• High G′, low-hydrophilicity fillers are preferred for deep structural augmentation. Slow, low-pressure injection with small volumes reduces complication risk in this confined anatomical region.
| Train to Inject the Temple Safely and Precisely The temple is one of the most anatomically challenging injection sites in the face. Achieving natural, long-lasting results requires a thorough understanding of the eight-layer temporal anatomy, the variable course of the superficial temporal artery, and how plane selection determines both safety and outcome. At Acquisition Aesthetics, temporal injection technique is taught with clinical anatomy at its core, from Foundation to Level 7. Whether you’re approaching the temple for the first time or refining your technique with ultrasound guidance, our clinically led courses give you the anatomical confidence to treat safely and precisely. ➤ Explore Our Courses and Book Your Place acquisitionaesthetics.co.uk/courses |
Beleznay K, Carruthers JDA, Humphrey S, Carruthers A, Jones D. Update on avoiding and treating blindness from fillers: a recent review of the world literature. Aesthet Surg J. 2019;39(6):662–674. PubMed
Chen C-L, Cong L-Y, Kong X-X, Zhao W-R, Hong W-J, Luo C-E, Luo S-K. Three-dimensional computed tomography scanning of temporal vessels to assess the safety of filler injections. Aesthet Surg J. 2021;41(11):1306–1313. PubMed
Cotofana S, Gaete A, Hernandez CA, Casabona G, Bay S, Pavicic T, Coimbra D, Suwanchinda A, Swift A, Green JB, Nikolis A, Frank K. The six different injection techniques for the temple relevant for soft tissue filler augmentation procedures — clinical anatomy and danger zones. J Cosmet Dermatol. 2020;19(7):1570–1579. PubMed
Lee W, Park JW, Yang EJ. Temple augmentation by injecting a hyaluronic acid filler between the superficial and deep temporal fasciae. J Cosmet Dermatol. 2022;21(10):4313–4318. PubMed
Surek CC. A new target for temple volumization? An anatomical and ultrasound-guided study of the intermediate temporal fat pad. Aesthet Surg J. 2021;41(12):1339–1343. PubMed
