Yuki Teranishi , Yusuke Okanoue , Junpei Dan , Dai Ohira , Masahiko Ikeuchi
{"title":"在全髋关节置换术中使用基于智能手机的数字校准指南精确放置髋臼杯","authors":"Yuki Teranishi , Yusuke Okanoue , Junpei Dan , Dai Ohira , Masahiko Ikeuchi","doi":"10.1016/j.jjoisr.2024.10.002","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose</h3><div>Successful total hip arthroplasty (THA) requires accurate positioning of the acetabular cup. Although computed tomography (CT)-based navigation technology enables more accurate placement, most navigation systems are bulky, expensive, and often inaccessible due to cost and complexity. The purpose of this study was to introduce a smartphone-based digital cup alignment guide to improve placement accuracy and provide a cost-effective and accessible solution for THA.</div></div><div><h3>Methods</h3><div>A smartphone application for acetabular cup placement in THA using built-in gyroscope and accelerometer sensors was developed. The application calculates and displays the cup inclination angle to ensure surgical accuracy. A prospective study was conducted to verify and validate the new guide by assessing the difference between the target pre-operative planned angles and the post-operative placement angles in 87 patients. Differences between the displayed intra-operative angles and the post-operative placement angles were compared between the new guide and CT-based navigation in 20 of the 87 cases.</div></div><div><h3>Results</h3><div>The post-operative cup inclination and anteversion angles were 40.4 ± 2.9° (range 35–47°) and 13.7 ± 4.4° (range 5–27°). Differences between the intra-operative target and post-operative cup inclination and anteversion angles were 1.8 ± 1.9° (range 0–7°) and 2.8 ± 2.5° (range 0–10°), respectively. The application demonstrated no significant difference in cup inclination and anteversion angle accuracy compared with CT-based navigation.</div></div><div><h3>Conclusions</h3><div>The smartphone-based guide provides a practical alternative for cup placement in THA, especially in settings where CT-based navigation is not available. Challenges include the need to manage intra-operative pelvic alignment and rotational errors, which suggest room for improvement. However, it is a cost-effective and accessible tool that can improve the accuracy of acetabular cup placement in THA.</div></div>","PeriodicalId":100795,"journal":{"name":"Journal of Joint Surgery and Research","volume":"3 1","pages":"Pages 1-7"},"PeriodicalIF":0.0000,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Accurate acetabular cup placement using a smartphone-based digital alignment guide in total hip arthroplasty\",\"authors\":\"Yuki Teranishi , Yusuke Okanoue , Junpei Dan , Dai Ohira , Masahiko Ikeuchi\",\"doi\":\"10.1016/j.jjoisr.2024.10.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose</h3><div>Successful total hip arthroplasty (THA) requires accurate positioning of the acetabular cup. Although computed tomography (CT)-based navigation technology enables more accurate placement, most navigation systems are bulky, expensive, and often inaccessible due to cost and complexity. The purpose of this study was to introduce a smartphone-based digital cup alignment guide to improve placement accuracy and provide a cost-effective and accessible solution for THA.</div></div><div><h3>Methods</h3><div>A smartphone application for acetabular cup placement in THA using built-in gyroscope and accelerometer sensors was developed. The application calculates and displays the cup inclination angle to ensure surgical accuracy. A prospective study was conducted to verify and validate the new guide by assessing the difference between the target pre-operative planned angles and the post-operative placement angles in 87 patients. Differences between the displayed intra-operative angles and the post-operative placement angles were compared between the new guide and CT-based navigation in 20 of the 87 cases.</div></div><div><h3>Results</h3><div>The post-operative cup inclination and anteversion angles were 40.4 ± 2.9° (range 35–47°) and 13.7 ± 4.4° (range 5–27°). Differences between the intra-operative target and post-operative cup inclination and anteversion angles were 1.8 ± 1.9° (range 0–7°) and 2.8 ± 2.5° (range 0–10°), respectively. The application demonstrated no significant difference in cup inclination and anteversion angle accuracy compared with CT-based navigation.</div></div><div><h3>Conclusions</h3><div>The smartphone-based guide provides a practical alternative for cup placement in THA, especially in settings where CT-based navigation is not available. Challenges include the need to manage intra-operative pelvic alignment and rotational errors, which suggest room for improvement. However, it is a cost-effective and accessible tool that can improve the accuracy of acetabular cup placement in THA.</div></div>\",\"PeriodicalId\":100795,\"journal\":{\"name\":\"Journal of Joint Surgery and Research\",\"volume\":\"3 1\",\"pages\":\"Pages 1-7\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-11-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Joint Surgery and Research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2949705124000276\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Joint Surgery and Research","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2949705124000276","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Accurate acetabular cup placement using a smartphone-based digital alignment guide in total hip arthroplasty
Purpose
Successful total hip arthroplasty (THA) requires accurate positioning of the acetabular cup. Although computed tomography (CT)-based navigation technology enables more accurate placement, most navigation systems are bulky, expensive, and often inaccessible due to cost and complexity. The purpose of this study was to introduce a smartphone-based digital cup alignment guide to improve placement accuracy and provide a cost-effective and accessible solution for THA.
Methods
A smartphone application for acetabular cup placement in THA using built-in gyroscope and accelerometer sensors was developed. The application calculates and displays the cup inclination angle to ensure surgical accuracy. A prospective study was conducted to verify and validate the new guide by assessing the difference between the target pre-operative planned angles and the post-operative placement angles in 87 patients. Differences between the displayed intra-operative angles and the post-operative placement angles were compared between the new guide and CT-based navigation in 20 of the 87 cases.
Results
The post-operative cup inclination and anteversion angles were 40.4 ± 2.9° (range 35–47°) and 13.7 ± 4.4° (range 5–27°). Differences between the intra-operative target and post-operative cup inclination and anteversion angles were 1.8 ± 1.9° (range 0–7°) and 2.8 ± 2.5° (range 0–10°), respectively. The application demonstrated no significant difference in cup inclination and anteversion angle accuracy compared with CT-based navigation.
Conclusions
The smartphone-based guide provides a practical alternative for cup placement in THA, especially in settings where CT-based navigation is not available. Challenges include the need to manage intra-operative pelvic alignment and rotational errors, which suggest room for improvement. However, it is a cost-effective and accessible tool that can improve the accuracy of acetabular cup placement in THA.
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