3D scan of sinus cavity showing arterial connections for sinus lift planning

Unlocking Safer Sinus Lifts: How 3D Imaging Can Prevent Bleeding

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Rhea Morgan in Health & Wellness October 2026 • 4 min read.

"A Deep Dive into the Anastomosis of Arteries in the Sinus Maxillary and the Importance of Preoperative Planning"


Oral surgeries, especially those involving the maxillary sinus, demand meticulous preoperative planning. Visualizing the intricate network of structures is paramount to avoiding damage and complications during the procedure. A primary concern during sinus lift surgery, which elevates the lateral sinus floor, is the risk of severe bleeding. This risk stems from potential injury to the anastomosis, the connection point, of the superior posterior alveolar artery and the infraorbital artery.

These arteries, while essential, can pose a significant challenge if their precise location and relationship to the surgical site aren't fully understood. Uncontrolled bleeding not only complicates the surgery but can also jeopardize patient safety and prolong recovery.

A groundbreaking study from the Medical University of Graz investigated the clinical and radiological aspects of these arterial anastomoses. The research team aimed to evaluate patients undergoing sinus lift surgery, emphasizing the importance of detailed preoperative assessment to mitigate risks.

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Planning Around Sinus Anatomy

A study of the anastomosis between the posterior superior alveolar and infraorbital arteries included 20 patients: 15 women and 5 men, with an average age of 59 years (standard deviation 15.4). A maxillary sinus lift is used when limited bone in the posterior upper jaw cannot accommodate a dental implant. Three-dimensional models can simulate surgery before the procedure, and the cited article emphasizes mapping arterial anatomy to help surgeons anticipate bleeding risks and tailor their approach.

Conventional Sinus Lift Methods

The lateral window and crestal osteotome approaches are established methods for maxillary sinus augmentation, but reported complications include sinus membrane tears, bleeding, and sinusitis. To reduce bleeding, traditional approaches include preserving the vessel with multiple bony windows or neutralizing it at the surgical site. These measures can be technique-sensitive and time-intensive. A 2026 review describes the lateral window approach as an invasive traditional technique associated with complication risk.

From Sinus Lift History to Detailed Planning

A 2026 review traces sinus lift methods and focuses on the development of hydraulic techniques and potential improvements in tools and materials. Separately, a 2026 planning guide describes CBCT evaluation of remaining bone height, bone width, and sinus wall thickness, measured to millimeter precision. Together, these sources reflect attention to both the evolution of surgical methods and detailed preoperative assessment.

Mapping the Arterial Landscape: Why Preoperative Imaging Matters

3D scan of sinus cavity showing arterial connections for sinus lift planning

The study meticulously examined patients undergoing sinus floor augmentation. Researchers utilized Digital Volume Tomography (DVT), a sophisticated 3D imaging technique, to map the exact location of the anastomosis between the superior posterior alveolar artery and the infraorbital artery. This preoperative imaging was crucial in understanding the unique anatomical variations in each patient.

Beyond just imaging, the study incorporated intraoperative verification. Surgeons documented any bleeding encountered during the procedure using a standardized evaluation form. This real-time feedback was then compared with the preoperative DVT scans, providing a comprehensive dataset for analysis.

  • The patient collective included 15 women and 5 men.
  • The average age of 59 years (SD 15.4).
  • There were 80 total evaluations of the topographical position of the anastomosis, including preoperative tomography and intraoperative inspection.
  • The dental gaps were classified as edentulous spaces (40%), free ends (50%) and edentulous (10%).
  • The smallest vessel diameter of the anastomosis was found in region 16 26 with 0.72 mm, and the maximal vessel diameter in region 14 24 with 2.06 mm.
  • Smallest craniocaudal distance of 1.26 mm and the maximal craniocaudal distance of 13.6 mm from the sinus floor to the lower edge of the vessel were found in region 15 25.
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Evidence and Complications Remain Concerns

Conventional sinus augmentation methods, including the lateral window and crestal osteotome techniques, may involve complications such as membrane tears, bleeding, and sinusitis. Newer options—including piezoelectric devices, hydraulic sinus lifts, and reamer burs—have been proposed to reduce complications, but a 2022 review says evidence for their effectiveness and safety remains lacking. The sources also stress that preventing and managing complications begins with thorough knowledge of sinus augmentation techniques.

The detailed analysis revealed significant anatomical variation in the location, size, and morphology of the arterial anastomosis. Interestingly, the degree of dental atrophy didn't seem to influence these variations. Most importantly, the study reported no cases of intraoperative bleeding among the 20 patients, underscoring the value of thorough preoperative planning.

The Future of Sinus Lifts: Precision and Prevention

These findings reinforce the critical role of preoperative three-dimensional imaging in sinus lift procedures. By meticulously mapping the arterial landscape, surgeons can anticipate potential risks and tailor their approach to minimize bleeding.

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Challenges in Surgical Decision-Making

For maxillary sinus floor elevation in patients with residual bone height below 4 mm, choosing an approach and predicting intraoperative mucosal perforation can be challenging. A 2025 source describes traditional decisions as relying heavily on clinician experience, with limited standardization and objectivity. A separate 2023 source notes that open sinus lifting has specific complications in addition to common oral-surgery issues such as swelling or hematoma.

Continuing Evolution of Sinus Lift Techniques

A 2024 review places the development of sinus floor elevation before contemporary dental implant technology. It reports that maxillary sinus augmentation was already underway in the 1960s, decades before Brånemark introduced biocompatible titanium-based implant root forms. This historical perspective situates current technique trends within a longer evolution of sinus lift procedures.

Imaging to Support Planning and Follow-Up

CBCT imaging before sinus floor elevation gives surgeons a more detailed view of the surgical site and can reveal potential pathologies in three dimensions. The source says it can support more precise virtual planning while reducing patient morbidity. It can also be used after surgery to assess changes in the sinus and bone graft.

For patients considering sinus lift surgery, this research offers reassurance. Discussing the use of 3D imaging with your surgeon and understanding the individual anatomy of your sinus can significantly improve the safety and predictability of the procedure.

As technology advances, even more precise imaging techniques may become available, further refining our ability to navigate the complexities of the sinus and ensure successful, complication-free outcomes.

The weight of this evidence on sinus artery mapping

Observational study (level 4 of 8)

Because the study included 20 patients, its findings do not establish how often bleeding would occur in a broader population or whether the same results would hold elsewhere.[1]

A prospective study of sinus floor augmentation at Graz

Study designObservational study[1]
PopulationPatients undergoing sinus floor augmentation[1]
Sample size20 patients[1]
SettingDepartment of Dentistry and Maxillofacial Surgery, Medical University of Graz[1]
DurationJanuary 2017 to September 2017[1]
Main outcomeTopographical position of the anastomosis and intraoperative bleeding[1]
Times cited0[1]

How the artery measurements compare with related imaging work

A separate study reported a mean intraosseous artery diameter of 1.4 mm in dentate participants and 1.0 mm in posteriorly edentulous participants. Those group averages provide context for the current study’s site-specific diameter extremes, but do not establish a like-for-like comparison.[1] [2]

A comparator study found the artery canal on CT in 53% of evaluated cases, and another reported an intraosseous appearance in 68.2% of augmentation cases. These concern canal visibility or course, not the same endpoint as the current study’s mapping of an anastomosis.[3]

Questions left by the sinus artery study

  • Would the observed anatomical variation and bleeding findings be similar in a larger or different patient group?[1]
  • How closely do preoperative tomography and intraoperative inspection agree when locating the anastomosis?[1]

Sources

  1. Clinical and radiological investigation of the anastomosis of the artery alveolar superior posterior and the artery infraorbitalis in the anterograde‐lateral wall of the sinus maxillary (Wiley, 2018)
  2. Quantitative and qualitative assessments of intraosseous neurovascular canals in dentate and posteriorly edentulous individuals in lateral maxillary sinus wall (pmc.ncbi.nlm.nih.gov)
  3. Identification of the Bony Canal of the Posterior Superior Alveolar Nerve and Artery in the Maxillary Sinus: Tomographic, Radiographic, and Macroscopic Analyses (pmc.ncbi.nlm.nih.gov)

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1111/clr.338_13358, Alternate LINK

Title: Clinical And Radiological Investigation Of The Anastomosis Of The Artery Alveolar Superior Posterior And The Artery Infraorbitalis In The Anterograde-Lateral Wall Of The Sinus Maxillary

Subject: Oral Surgery

Journal: Clinical Oral Implants Research

Publisher: Wiley

Authors: Barbara Kirnbauer, Evelyn Pierer, Norbert Jakse

Published: 2018-10-01

Everything You Need To Know

1

What is a sinus lift, and why is it performed?

A sinus lift is a surgical procedure that increases the bone in the upper jaw, specifically in the area of the molars and premolars, by lifting the sinus membrane. The primary goal is to create enough bone height to allow for the placement of dental implants. This is important because it addresses bone loss that may have occurred due to tooth extraction or other factors. Without sufficient bone, dental implants cannot be successfully placed, and a sinus lift becomes a necessary step to restore oral function and aesthetics.

2

What are the superior posterior alveolar artery and the infraorbital artery, and why are they important in the context of sinus lift surgery?

The superior posterior alveolar artery and the infraorbital artery are critical blood vessels in the upper jaw. The superior posterior alveolar artery supplies blood to the upper molars and premolars, while the infraorbital artery supplies blood to the upper lip, cheek, and side of the nose. They are important because they can be damaged if not handled with care during a sinus lift. Damage can lead to significant bleeding during the surgery, which is a risk that 3D imaging helps mitigate by visualizing the relationship of these arteries to the surgical site. Bleeding complicates the surgery and may negatively affect the patient.

3

What is an anastomosis, and why is its location important in the context of sinus lift surgery?

An anastomosis is a point where two blood vessels connect. In the context of sinus lift surgery, it refers to the connection between the superior posterior alveolar artery and the infraorbital artery. Understanding the location of this anastomosis is critical because it's a potential source of bleeding during sinus lift surgery. The precise location varies from person to person and can be difficult to predict without advanced imaging. 3D imaging allows surgeons to pinpoint the location of the anastomosis, helping them to avoid damaging it during the procedure. Preventing damage to the anastomosis minimizes the risk of uncontrolled bleeding and enhances patient safety.

4

What does preoperative planning involve, and why is it so important for sinus lift surgery?

Preoperative planning involves carefully assessing a patient's anatomy before sinus lift surgery. This includes a thorough examination and the use of advanced imaging techniques, like Digital Volume Tomography (DVT), to visualize the structures in the upper jaw. Preoperative planning is essential because it allows surgeons to identify potential risks, such as the proximity of the anastomosis to the surgical site. Detailed preoperative planning allows surgeons to tailor their surgical approach to minimize the risk of complications like bleeding and ensures a safer and more predictable outcome for the patient.

5

How does 3D imaging help in sinus lift procedures?

3D imaging, such as Digital Volume Tomography (DVT), provides detailed, three-dimensional views of the patient's anatomy. In the context of sinus lifts, it is used to map the location of the anastomosis of the superior posterior alveolar artery and the infraorbital artery. The significance is that it allows surgeons to visualize the critical structures before the procedure, which is impossible with traditional 2D X-rays. This improved visualization helps surgeons to anticipate potential complications, such as bleeding, and to plan the surgery to minimize risks. This ultimately leads to improved patient safety and better surgical outcomes.

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