Sex-based differences in human sacroiliac joint shape: a three-dimensional morphological analysis of the iliac auricular surface of modern Japanese macerated bones

Nishi, Keita; Sawamoto, Kazunobu; Oyamada, Joichi; Okamoto, Keishi; Ogami-Takamura, Keiko; Hasegawa, Takashi; Moriuchi, Takefumi; Sakamoto, Junya; Higashi, Toshio; Tsurumoto, Toshiyuki; Manabe, Yoshitaka

doi:10.1007/s12565-019-00513-2

Cited by 10 publications

(19 citation statements)

References 45 publications

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“…Further studies have speci cally measured the auricular surface size in adults between the sexes, sides and bones with results ranging from 10.0 to 12.8 cm 2 1,5,10,29 . No signi cant difference was found between the sacral and iliac sides nor between left and right sides, but there is a signi cant difference between sexes 1,5 . Additionally, greater variability was noted in the surface area sizes in males when compared to females and in the iliac side rather than the sacral side.…”

Section: Load-induced Mineralization Patterns Seem To Differ Between ...mentioning

confidence: 76%

“…The morphology of the sacroiliac (SIJ) auricular surfaces has been explored in the literature in relation to the changes occurring in response to natural degeneration of the joint [1][2][3][4][5][6][7] and sexual dysmorphism in the pelvis 1,3,5,7,8 . Regarding the role of the auricular surface in joint mobility and bipedal force transmission, some studies have looked into the in uence of the morphological differences and placement of the auricular surfaces in relation to the bony anatomy 2,9,10 .…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the role of the auricular surface in joint mobility and bipedal force transmission, some studies have looked into the in uence of the morphological differences and placement of the auricular surfaces in relation to the bony anatomy 2,9,10 . However, few studies have looked into whether the general shape and size of the SIJ auricular is associated with SIJ pain and what differences there may be between sexes 5,11,12 .…”

Section: Introductionmentioning

confidence: 99%

“…Its shape has been described using a myriad of terms including: "L", "C", "V"-shaped, auricle-shaped, crescent-shaped, wedge-like, propeller-shaped, elliptical, triangular or rectangular 2,4-6,8,10,13,14,16−18 , supporting the claim that the shape of the auricular surface varies considerably 13,17−21 . A number of morphological studies have mapped the shape of the surfaces in relation to the limb shapes and sizes and have reported the angles of the posterior border in an attempt to categorize the general shapes based on the posterior angle 5,6,11,14,15 . Speci cally, three morphology types have been described 11 where type 1 has a wide posterior angle (>160°), type 3 a narrow posterior angle (<130°) and type 2 is in between (130-160°).…”

Section: Introductionmentioning

confidence: 99%

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Influence of Size and Shape of the Auricular Surfaces on Subchondral Bone Density Distribution in the Sacroiliac Joint

et al. 2022

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Section: Load-induced Mineralization Patterns Seem To Differ Between ...mentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Size and Shape of the Auricular Surfaces on Subchondral Bone Density Distribution in the Sacroiliac Joint

et al. 2022

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“…In the present study, 4 dorsal breached screws (3.9%) were identified in female patients. Nishi et al 12 reported in their cadaveric study that the size of the iliac auricular surface was significantly larger in males than in females. 12 Because the screw entry point is always slightly medial to the guidewire, if the size of the sacroiliac joint is small, the screw must be inserted more dorsally than the guidewire to prevent ventral breach.…”

Section: Discussionmentioning

confidence: 95%

Extra-articular Portion of the Sacroiliac Joint—Between the Sacral and Pelvic Tuberosities: An Anatomical Guide for the S2-Alar-Iliac Screw Trajectory

Tatara

Niimura

Sekiya

et al. 2020

Global Spine Journal

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Study Design: A novel technique for S2-alar-iliac (S2AI) screw placement was analyzed. Objectives: Accurate confirmation of the S2AI screw trajectory with free-hand techniques is not simple, although some anatomical landmarks have been reported. To overcome the drawback, we aimed to introduce our technique for S2AI screw placement assisted with a guidewire using a new anatomical landmark. Methods: A total of 104 S2AI screws of 52 patients who underwent S2AI screw placement were investigated. Navigation software was used to simulate S2AI screw placement preoperatively. Screw placement was performed with the nonfluoroscopic free-hand technique. In this technique, a guidewire is inserted into the ilium from the extra-articular portion of the sacroiliac joint just lateral to the ideal screw entry point toward the tip of the greater trochanter and guides the screw trajectory. If the direction of the guidewire is satisfactory, all procedures of screw insertion are performed accordingly. The screw accuracy was assessed with computed tomography. Results: The modal size of the screw was 9.5 mm × 90 mm. The average horizontal angle was 42.0° (SD = 5.1°) on the right and 40.7° (SD = 4.7°) on the left. Of the 104 screws, 4 screws (3.9%) breached dorsally. No screw-related complication was observed. Conclusions: Because the guidewire can be inserted at an angle according to the individual morphology of the sacroiliac joint, it will be a reliable guide for the screw trajectory. This technique with a guidewire would help improve the accuracy of S2AI screw placement.

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Auricular surface morphology and surface area does not influence subchondral bone density distribution in the dysfunctional sacroiliac joint

et al. 2022

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Background: The subchondral lamella of the sacroiliac joint (SIJ) auricular surface is morphologically inconsistent, varying inter-individually and side-dependently. These variations have been well documented, however, the morpho-mechanical relationship to sacroiliac joint dysfunction (SIJD) remains unstudied to date. Here, the bone mineralisation density of the iliac and sacral auricular surface subchondral endplate is compared between morphological subtypes, as well as in large and small surfaces, in a cohort comprising SIJD joints and controls.Methods: Computed tomography (CT) datasets from 29 patients with bilateral or unilateral SIJD were subjected to CT osteoabsorptiometry. Sacral and iliac surface areas and posterior angles were calculated and surfaces were classi ed into small (<15 cm 3 ) and large (≥15 cm 3 ) joints and morphological types 1 (>160°), 2 (130-160°) and 3 (<130°), respectively. Mineralisation patterns were classi ed into four patterns, two marginal (M1 and M2) and two non-marginal (N1 and N2). Each sacral and iliac surface was subsequently classi ed into one of these mineralisation groups.Results: The surface area of all joints in the cohort averaged 15.0±2.4 cm 2 (males 16.2±2.5 cm 2 , females 13.7±1.6 cm 2 ). No age correlations with surface area were found nor differences in mean HU values when comparing sizes, sexes or morphology type when looking at painful joints (unilateral or bilateral) and contralateral non-painful joints. Comparisons of controls with the SIJD cohort revealed signi cant differences in female sacra (p=0.02) and small sacra (p=0.03). There was low conformity in marginal and non-marginal patterns, 26% for contralateral non-painful joints, and 46% conformity in painful joints.The majority of dysfunctional joints was of type 2 morphology (59%), equally distributed between small (49%) and large joints (51%). Larger joints had the highest frequency of painful joints (72%). Regarding the prominence of sub-patterns, M1C was more prominent in painful joints.Conclusions: Load distribution related to difference in auricular surface morphology seems to have little impact on pain-related subchondral bone adaptation in cases of SIJD. Larger joints may be predisposed to the onset of pain due to the weakening of the extracapsular structures. Pain-affected joints re ect common conformity patterns of sacral apex mineralisation with corresponding superior corner iliac mineralisation.

show abstract

Sex-based differences in human sacroiliac joint shape: a three-dimensional morphological analysis of the iliac auricular surface of modern Japanese macerated bones

Cited by 10 publications

References 45 publications

Influence of Size and Shape of the Auricular Surfaces on Subchondral Bone Density Distribution in the Sacroiliac Joint

Influence of Size and Shape of the Auricular Surfaces on Subchondral Bone Density Distribution in the Sacroiliac Joint

Extra-articular Portion of the Sacroiliac Joint—Between the Sacral and Pelvic Tuberosities: An Anatomical Guide for the S2-Alar-Iliac Screw Trajectory

Auricular surface morphology and surface area does not influence subchondral bone density distribution in the dysfunctional sacroiliac joint

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