Evidence map›Paper›PMID 41758241›Full record

ArticleEuropean journal of trauma and emergency surgery : official publication of the European Trauma Society2026

Preferential sacral fracture sites in fragility fractures of the pelvis type IVb and comparison of internal fixation methods: CT-based morphological mapping and finite element analysis.

Shuichi Naniwa, Masanori Yorimitsu, Tsubasa Hasegawa, Teruhiko Ando, Ryuichiro Okuda, Shiro Fukuoka, Yusuke Mochizuki, Yasuaki Yamakawa, Ryuichi Nakahara, Shiro Hanakawa and 1 more

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Article in European journal of trauma and emergency surgery : official publication of the European Trauma Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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11 authors.

Shuichi NaniwaDepartment of Orthopaedic Surgery, Section of Medicine, Division of Medicine, Dentistry and Pharmaceutical Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan.ORCID http://orcid.org/0009-0009-3587-4975
Masanori YorimitsuDepartment of Musculoskeletal Traumatology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan. mayorimitsu@gmail.com.
Tsubasa HasegawaDepartment of Orthopaedic Surgery, Section of Medicine, Division of Medicine, Dentistry and Pharmaceutical Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan.
Teruhiko AndoDepartment of Orthopaedic Surgery, Section of Medicine, Division of Medicine, Dentistry and Pharmaceutical Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan.
Ryuichiro OkudaDepartment of Orthopaedic Surgery, Section of Medicine, Division of Medicine, Dentistry and Pharmaceutical Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan.
Shiro FukuokaDepartment of Orthopaedic Surgery, Kagawa Prefectural Central Hospital, 1-2-1 Asahi-machi, Takamatsu city, 760-8557, Kagawa, Japan.
Yusuke MochizukiDepartment of Emergency Health Care and Disaster Medicine, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita- ku, Okayama city, 700-8558, Okayama, Japan.
Yasuaki YamakawaDepartment of Orthopaedic Surgery, Kochi Health Sciences Center, 2125-1 Ike, Kochi city, 781-0111, Japan.
Ryuichi NakaharaDepartment of Musculoskeletal Health Promotion, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan.
Shiro HanakawaDepartment of Orthopaedic Surgery, Okayama Saidaiji Hospital, 1-1-70 Kanaokahigashi-machi, Higashi-ku, Okayama city, 704-8194, Okayama, Japan.
Toshifumi OzakiDepartment of Orthopedic Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama city, 700-8558, Okayama, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeFragility fractures of the pelvis (FFP) classified as Rommens-Hoffman type IVb are associated with spinopelvic dissociation and are generally considered to require surgical intervention. This study aimed to clarify the localization patterns of FFP type IVb and compare the biomechanical stability of different internal fixation techniques.

methodsIn this retrospective study, morphologic mapping of sacral fracture lines was performed in 36 patients with FFP type IVb. Based on the mapping results, a finite element (FE) model of FFP type IVb was developed to evaluate the biomechanical stability of ilio-sacral screw (ISS) fixation, trans-sacral screw (TSS) fixation, spinopelvic fixation (SPF; On each side, L5 pedicle screw was connected to two iliac screws with a rod, and the bilateral constructs were linked using a cross-connector.), and bilateral triangular fixation (one TSS at S1 combined with SPF mentioned above) using finite element analysis (FEA).

resultsMorphologic mapping showed that the sacrum fracture transverse line tended to pass between the S1-2 transverse lines. Although bilateral triangular fixation and SPF provided the highest stability in both U-type and H-type fractures, a TSS for U-type and two TSSs for H-type also demonstrated comparable levels of stability. ISS-based methods showed greater displacements.

conclusionTSS-based fixation may provide stability comparable to bilateral triangular fixation and SPF in FFP type IVb, with less invasiveness when anatomy permits. Further studies are needed to optimize treatment strategies for this complex injury.

Indexed as

Finite element analysisFragility fractures of the pelvisInternal fixationSpinopelvic dissociation

Identifiers

PMID41758241
PMCPMC12948919

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.