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Peer-reviewedCC BYDiagnostics (Basel, Switzerland)

Delayed Complications After Maxillary Sinus Floor Augmentation with a Bovine Xenohybrid Bone Graft: A Retrospective Clinical Case Series.

  • Patrick Bandura1,2
  • Christian Philipp Schnell1,2
  • Claas Willem Molsen1,2
  • Anna Sophia Bandura1,2
  • Pascal Grün1,2
  • Marius Meier1,2,3
  • Maximilian Jung1,2
  • Flora Turhani1,2
  • Sebastian Fitzek4
  • Dritan Turhani1,2
4 affiliations
  1. 1Center for Oral and Maxillofacial Surgery, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, Steiner Landstrasse 124, A-3500 Krems-Stein, Austria.
  2. 2Clinical Application of Artificial Intelligence in Dentistry (CAAID) Group, Department of Dentistry, Faculty of Medicine and Dentistry, Danube Private University, Steiner Landstrasse 124, A-3500 Krems-Stein, Austria.
  3. 3Dental Practice, 9490 Vaduz, Liechtenstein.
  4. 4Medical Image Analysis & Artificial Intelligence (MIAAI) Group, Faculty of Medicine and Dentistry, Danube Private University, Steiner Landstrasse 124, 3500 Krems An Der Donau, Austria.
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Abstract

Background/Objectives: Maxillary sinus floor augmentation (MSFA) via the lateral approach is a well-established procedure for prosthetic rehabilitation of atrophic posterior maxillae. However, late complications are often nonspecific, with an incompletely understood aetiology. We evaluated patients with atypical late complications post-MSFA with bovine xenohybrid bone substitute NaturesQue SemOss B (BEGO GmbH, Bremen, Germany), describing their presentation, management, and outcomes. Methods: This retrospective, complication-selected clinical case series examined 47 patients who underwent lateral window MSFA with this graft from September 2020 to March 2023 in a single university department. Twelve complication cases were identified during the study period. Atypical late complications were defined as graft-associated clinical and/or radiological adverse outcomes, excluding peri-implantitis, that first manifested > 6 mo postoperatively. Baseline characteristics, perioperative findings, conservative and surgical management (including graft removal and reaugmentation), histology, and follow-up were assessed. Results: Twelve complication cases were identified among 47 patients treated during the study period. Seven experienced implant loss; seven, partial or complete lack of graft osseointegration; six, pain; and seven, signs of sinus infection. Histological analysis (6/12) revealed lymphocytes, plasma cells, and fibroblastic changes without detectable macrophages. No intraoperative complications were observed. Conclusions: Atypical late complications affected 25.5% of the patients. Despite comprehensive clinical, radiological, and histological assessments, the aetiology remained unclear, and the findings did not indicate a peri-implantitis-type infection; we hypothesised impaired early phase wound healing These patients were amenable to repeat augmentation post-non-osseointegrated graft removal, although larger studies are required.

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Cite

BibTeXRIS
BibTeX
@article{bandura2026delayed,
  title = {{Delayed Complications After Maxillary Sinus Floor Augmentation with a Bovine Xenohybrid Bone Graft: A Retrospective Clinical Case Series.}},
  author = {Patrick Bandura and Christian Philipp Schnell and Claas Willem Molsen and Anna Sophia Bandura and Pascal Grün and Marius Meier and Maximilian Jung and Flora Turhani and Sebastian Fitzek and Dritan Turhani},
  journal = {Diagnostics (Basel, Switzerland)},
  year = {2026},
  month = sep,
  doi = {10.3390/diagnostics16193098},
  url = {https://europepmc.org/article/MED/42882252},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Delayed Complications After Maxillary Sinus Floor Augmentation with a Bovine Xenohybrid Bone Graft: A Retrospective Clinical Case Series.
AU  - Patrick Bandura
AU  - Christian Philipp Schnell
AU  - Claas Willem Molsen
AU  - Anna Sophia Bandura
AU  - Pascal Grün
AU  - Marius Meier
AU  - Maximilian Jung
AU  - Flora Turhani
AU  - Sebastian Fitzek
AU  - Dritan Turhani
PY  - 2026
DA  - 2026/09/24
JO  - Diagnostics (Basel, Switzerland)
DO  - 10.3390/diagnostics16193098
UR  - https://europepmc.org/article/MED/42882252
AB  - Background/Objectives: Maxillary sinus floor augmentation (MSFA) via the lateral approach is a well-established procedure for prosthetic rehabilitation of atrophic posterior maxillae. However, late complications are often nonspecific, with an incompletely understood aetiology. We evaluated patients with atypical late complications post-MSFA with bovine xenohybrid bone substitute NaturesQue SemOss B (BEGO GmbH, Bremen, Germany), describing their presentation, management, and outcomes. Methods: This retrospective, complication-selected clinical case series examined 47 patients who underwent lateral window MSFA with this graft from September 2020 to March 2023 in a single university department. Twelve complication cases were identified during the study period. Atypical late complications were defined as graft-associated clinical and/or radiological adverse outcomes, excluding peri-implantitis, that first manifested > 6 mo postoperatively. Baseline characteristics, perioperative findings, conservative and surgical management (including graft removal and reaugmentation), histology, and follow-up were assessed. Results: Twelve complication cases were identified among 47 patients treated during the study period. Seven experienced implant loss; seven, partial or complete lack of graft osseointegration; six, pain; and seven, signs of sinus infection. Histological analysis (6/12) revealed lymphocytes, plasma cells, and fibroblastic changes without detectable macrophages. No intraoperative complications were observed. Conclusions: Atypical late complications affected 25.5% of the patients. Despite comprehensive clinical, radiological, and histological assessments, the aetiology remained unclear, and the findings did not indicate a peri-implantitis-type infection; we hypothesised impaired early phase wound healing These patients were amenable to repeat augmentation post-non-osseointegrated graft removal, although larger studies are required.
SN  - 2075-4418
ER  -