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ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025

Factors causing deviation of robot-assisted pedicle screw placement for adolescent idiopathic scoliosis: why does deviation still occur even with robotics?

Jun Ueno, Yoshiaki Torii, Masahiro Iinuma, Atsuhiro Yoshida, Ken Tomochika, Takahiro Hideshima, Makoto Ito, Tsutomu Akazawa

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Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Jun UenoDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan. m0100011@yahoo.co.jp.
Yoshiaki ToriiDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
Masahiro IinumaDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
Atsuhiro YoshidaDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
Ken TomochikaDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
Takahiro HideshimaDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
Makoto ItoDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
Tsutomu AkazawaDepartment of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan. cds00350@par.odn.ne.jp.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo clarify the factors that are likely to cause deviation in robot-assisted pedicle screw placement in surgery for adolescent idiopathic scoliosis (AIS).

methodsThirty-two consecutive patients with AIS who underwent posterior spinal fusion using a spine robotics system were included. Robot-assisted pedicle screw placements were evaluated using Gertzbein-Robbins system. Deviation rates for breaches of 2 mm or more (Grade C, D, and E) were calculated. Pedicle channel grade, vertebral level, distance from the reference frame (RF), insertion order of the screws, curve laterality, and use of a navigated high-speed drill were investigated as factors causing deviation.

resultsA total of 465 robot-assisted pedicle screws were placed, and deviations were observed in 13 (2.8%). The deviation rates were significantly different by pedicle channel grade (Grade 1: 0%, Grade 2: 0%, Grade 3: 3.1%, Grade 4: 20.4%, p < 0.001), vertebral level, and use of a high-speed drill. There were no significant differences in deviation rates for distance from the RF, insertion order of the screws, or curve laterality. Logistic regression analysis showed pedicle channel grade 4 was a significant risk factor for deviation.

conclusionThe factor that was most likely to cause deviation in robot-assisted pedicle screw placement in AIS was pedicle channel grade. The most likely situation to cause deviation was a narrow pedicle with an internal diameter of less than one mm. Surgeons should be aware that even with the use of robotics, placing screws into such narrow pedicles is challenging.

Indexed as

Pedicle ScrewsRobotic Surgical ProceduresScoliosisSpinal FusionAdolescentChildFemaleHumansMaleAdolescent idiopathic scoliosisPedicle channelPedicle screwRobotic-assisted pedicle screw placementRobotics

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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.