shoulder

Shoulder
  • 文章类型: Case Reports
    电气损伤是发展中国家的普遍现象,由于日常电气维修过程中采取的安全措施不足。工作场所伤害占其中的20%。在一些严重的情况下,电损伤导致烧伤,间接骨折脱位,言语障碍,等。由于电损伤导致继发性并发症的跌倒非常普遍,即使不是很严重,他们确实需要立即治疗和充分康复。一名53岁的男性在电击后肩部受伤。患者还经历了刺激和言语障碍。检查显示肩关节范围减少,肩关节肌肉紧绷。物理治疗干预包括为患者及其家人提供咨询,节能方法,便于日常活动,康复方案,和改良的音乐疗法。用于评估进展的结果指标包括肩痛和残疾指数(SPADI),运动恐惧症的坦帕量表(TSK),抑郁、焦虑和压力量表。通过早期力量训练,辅助治疗的康复可有效改善患者的心理健康和身体健康状况。
    Electrical injuries are common phenomena in developing countries, due to inadequate safety measures followed during day-to-day electrical repairs. Workplace injuries account for 20% of these. In some severe cases, electrical injuries lead to burns, indirect fracture dislocations, speech impairments, etc. Falls due to electrical injuries leading to secondary complications are very common and, even though not very severe, they do require immediate treatment and adequate rehabilitation. A 53-year-old male suffered a shoulder injury following an electrical shock. The patient also experienced irritation and speech disturbances. Examination revealed a reduced range of shoulder joints and tightness of muscles of the shoulder complex. Physiotherapy intervention included counseling for the patient and his family members, energy conservation methods for ease in daily activities, a rehabilitation protocol, and modified music therapy. Outcome measures used to assess the progression constituted the Shoulder Pain and Disability Index (SPADI), the Tampa Scale for Kinesiophobia (TSK), and the Depression and Anxiety and Stress Scale. Rehabilitation with adjunct therapy is effective in the overall improvement of the patient\'s condition concerning their mental health as well as physical health by early strength training.
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  • 文章类型: Journal Article
    研究表明,有上肢疼痛和没有上肢疼痛的运动员之间的力学不同;然而,目前尚不清楚垒球运动员投掷相关疼痛存在哪些可改变的危险因素.
    要确定体育是否专业化,投掷,实践,有和没有上肢疼痛的青少年垒球运动员的力量和条件训练量各不相同。据推测,患有上肢疼痛的青少年垒球运动员将全年参加垒球,并且投掷次数更大,实践,与没有疼痛的人相比,力量和调理量。
    横断面研究;证据水平,3.
    共有232名来自旅行球的青少年垒球运动员,中学,高中联盟被邀请完成一项评估疼痛的调查,体育专业化,投掷,实践,以及力量和条件训练量。根据他们的调查答案,将参与者分为上肢疼痛和无疼痛组。使用Mann-WhitneyU和卡方检验比较各组之间的反应。
    总共101名运动员-平均±SD年龄为13.3±2.3岁,高度161±13.4厘米,体重59.8±14.8kg-完成了调查,并纳入分析。有效率为43.53%,上肢疼痛组22名运动员,无痛组79名运动员。观察到每周用于淡季垒球练习的时间之间存在显着差异(U,626.6;Z=-2;P=.045),那些没有上肢疼痛的人在淡季中每周练习垒球的中位时间(6小时)比那些有疼痛的人(10小时)少4小时。此外,在赛季中的比赛中,罚球次数之间存在显着差异(U,457;Z,-2.28;P=.022),那些没有上肢疼痛的人在赛季中的比赛中报告比那些有疼痛的人(91次投掷)少21次(70次投掷)。此外,77%的报告上肢疼痛的人尽管疼痛仍继续比赛。人口统计学特征之间没有其他显著差异,专业化,损伤史,和主要位置,除了投掷,实践,力量和调理量。
    我们的研究表明,与没有上肢疼痛的运动员相比,有上肢疼痛的青少年垒球运动员在赛季中的投掷次数更多,每周用于淡季练习的时间增加。我们的发现支持垒球利益相关者的需求(例如,教练,临床医生,父母,和管理员)进行有关季节内投球计数和淡季休息的进一步研究和建议。
    UNASSIGNED: Research indicates that mechanics differ between athletes with and without upper extremity pain; however, it is unclear which modifiable risk factors exist for throwing-related pain in softball athletes.
    UNASSIGNED: To determine whether sport specialization, throwing, practice, and strength and conditioning training volumes vary between youth softball athletes with and without upper extremity pain. It was hypothesized that youth softball athletes with upper extremity pain would participate in softball year-round and have greater throwing, practice, and strength and conditioning volumes compared with those without pain.
    UNASSIGNED: Cross-sectional study; Level of evidence, 3.
    UNASSIGNED: A total of 232 youth softball athletes from travel ball, middle school, and high school leagues were invited to complete a survey to assess pain, sport specialization, throwing, practice, and strength and conditioning training volumes. Participants were classified into upper extremity pain and no pain groups based on their survey answers. The responses were compared between groups using Mann-Whitney U and chi-square tests.
    UNASSIGNED: A total of 101 athletes-with a mean ± SD age of 13.3 ± 2.3 years, height of 161 ± 13.4 cm, and weight of 59.8 ± 14.8 kg-completed the survey and were included for analysis. The response rate was 43.53%, with 22 athletes in the upper extremity pain group and 79 athletes in the no pain group. A significant difference was observed between hours devoted per week to off-season softball practice (U, 626.6; Z =-2; P = .045), where those without upper extremity pain spent 4 fewer median hours (6 hours) practicing softball per week in the off-season compared with those with pain (10 hours). Also, a significant difference was found between the number of throws during an in-season game (U, 457; Z, -2.28; P = .022), where those without upper extremity pain reported 21 fewer median throws (70 throws) during an in-season game compared with those with pain (91 throws). Furthermore, 77% of those who reported upper extremity pain continued to play despite their pain. There were no other significant differences between demographic characteristics, specialization, injury history, and primary position, as well as throwing, practice, and strength and conditioning volumes.
    UNASSIGNED: Our study demonstrates that youth softball athletes with upper extremity pain had more throws during in-season games and increased hours per week devoted to off-season practice than athletes without upper extremity pain. Our findings support the need for softball stakeholders (eg, coaches, clinicians, parents, and administrators) to engage in further research and recommendations regarding in-season pitch counts and off-season rest.
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  • 文章类型: Journal Article
    用于肩袖修复的全缝线锚钉的使用正在增加。潜在的益处包括减少骨丢失和减少对软骨表面的损伤。在双排缝合桥肩袖修复中,比较内侧排锚钉固定方法的结果的证据很少。
    比较双排缝线桥肩袖修复中全缝线和实心内侧排锚的临床结果。
    案例系列;证据级别,4.
    总共352名患者(手术时的平均年龄,60.3年)在我们机构接受了双排缝线桥肩袖修复。根据患者是否进行了全缝合(n=280)或内侧行的固体(n=72)锚固固定,将患者分为2组。通过持续的纵向数据存储库或通过电话收集结果数据(最短随访时间,2.0年;平均随访时间,3.0年)。使用美国肩肘外科医生(ASES)标准化肩部评估表和视觉模拟量表(VAS)评估结果。对所有患者施用相同的康复方案。计算符合先前公布的患者可接受症状状态(PASS)阈值的患者比例,用于结果测量。使用线性和逻辑回归比较两组之间的结果评分和达到PASS阈值的患者比例,分别。
    两组在手术年龄方面没有差异,性别分布,肩袖撕裂尺寸,或使用的内侧行锚固件的数量。固体锚组较全缝合锚组有更长的随访时间(3.6±0.7vs2.8±0.8年,分别为;P<0.01)。控制随访时间后,实心和全缝合锚钉组的ASES评分(分别为89.6±17.8vs88.8±16.7;P=.44)或VAS评分(分别为1.1±2.1vs1.2±2.1;P=.37)均无差异.同样,在控制随访时间后,固体和全缝合锚钉组满足ASESPASS截止值的患者比例没有差异(84.7%vs80.7%,分别为;P=0.44)或VAS(80.6%对75.0%,分别;P=.83)。
    使用全缝线锚钉进行内侧行固定的双排缝线桥肩袖修复与使用实心内侧行锚钉进行肩袖修复的临床效果相似。
    UNASSIGNED: The use of all-suture anchors for rotator cuff repair is increasing. Potential benefits include decreased bone loss and decreased damage to the chondral surface. Minimal evidence exists comparing outcomes among medial-row anchor fixation methods in double-row suture bridge rotator cuff repair.
    UNASSIGNED: To compare the clinical outcomes between all-suture and solid medial-row anchors in double-row suture bridge rotator cuff repair.
    UNASSIGNED: Case series; Level of evidence, 4.
    UNASSIGNED: A total of 352 patients (mean age at surgery, 60.3 years) underwent double-row suture bridge rotator cuff repair at our institution. Patients were separated into 2 groups based on whether they underwent all-suture (n = 280) or solid (n = 72) anchor fixation for the medial row. Outcomes data were collected via an ongoing longitudinal data repository or through telephone calls (minimum follow-up time, 2.0 years; mean follow-up time, 3.0 years). Outcomes were evaluated using the American Shoulder and Elbow Surgeons (ASES) standardized shoulder assessment form and the visual analog scale (VAS). The same rehabilitation protocol was administered to all patients. The proportions of patients meeting previously published Patient Acceptable Symptom State (PASS) thresholds were calculated for the outcome measures, and outcome scores and the proportions of patients meeting PASS thresholds between groups were compared using linear and logistic regression, respectively.
    UNASSIGNED: The groups did not differ in terms of age at surgery, sex distribution, rotator cuff tear size, or number of medial-row anchors used. The solid anchor group had a longer follow-up time compared with the all-suture anchor group (3.6 ± 0.7 vs 2.8 ± 0.8 years, respectively; P < .01). After controlling for follow-up time, the solid and all-suture anchor groups did not differ in ASES scores (89.6 ± 17.8 vs 88.8 ± 16.7, respectively; P = .44) or VAS scores (1.1 ± 2.1 vs 1.2 ± 2.1, respectively; P = .37). Similarly, after controlling for follow-up time, the solid and all-suture anchor groups did not differ in the proportions of patients meeting PASS cutoffs for the ASES (84.7% vs 80.7%, respectively; P = .44) or the VAS (80.6% vs 75.0%, respectively; P = .83).
    UNASSIGNED: Double-row suture bridge rotator cuff repair using all-suture anchors for medial-row fixation demonstrated similar excellent clinical outcomes to rotator cuff repair using solid medial-row anchors.
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  • 文章类型: Journal Article
    评估eFisioTrack监测系统对接受肩关节损伤物理治疗的患者临床变量的影响,24名在医院接受物理治疗的肩关节骨科损伤成年患者参与了研究(实验组12名,对照组12名).临床结局指标为肩关节功能和疼痛(Constant-Murley评分和手臂残疾,肩膀,和Hand或DASH得分)。每个变量在基线和一个月随访时由盲物理治疗师测量。患者在物理治疗师的监督下(对照组)或在没有治疗师监督的情况下在单独的房间中进行规定的锻炼(实验组)。治疗前或随访时,两组之间的任何结果均无统计学差异(p≥0.05)。随访时,两组的DASH评分均有至少10分的统计学显着下降(p≤0.05)。Constant-Murley的总分和主观成分的差异也在组内得到证实。与在物理治疗师的直接监督下进行的那些相比,使用eFisioTrack系统在临床测量中显示出相似的结果。这种方法可能适合在家中提供有效的肩部锻炼计划。
    To assess the effects of the eFisioTrack monitoring system on clinical variables in patients with prescribed physiotherapy for shoulder injuries, twenty-four adult patients with shoulder orthopaedic injuries who underwent physical therapy treatment in a hospital setting participated in the study (twelve in the experimental group and twelve as controls). Clinical outcome measures were shoulder function and pain (Constant-Murley Score and Disabilities of the Arm, Shoulder, and Hand or DASH score). Each variable was measured by a blinded physiotherapist at baseline and at one month follow-up. Patients performed the prescribed exercises either supervised by the physiotherapist (control group) or in a separate room without therapist supervision (experimental group). There were no statistically significant differences between groups before treatment or at follow-up for any outcomes (p ≥ 0.05). There was a statistically significant decrease (p ≤ 0.05) of at least 10 points in both groups for the DASH score at follow-up. Differences in the total score and subjective components of the Constant-Murley were also evidenced within groups. The use of the eFisioTrack system showed similar results in clinical measures compared to those performed under the direct supervision of the physiotherapist. This approach might be suitable for providing an effective shoulder exercise program at home.
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  • 文章类型: Journal Article
    青年运动员人群中与棒球有关的伤害的患病率和严重程度继续升级,尽管卫生保健专业人员和体育组织努力平息这一趋势。本文回顾了当前的研究,这些研究调查了年轻棒球运动员最常见的伤害的危险因素和可能的预防策略。包括加强计划,音高计数指南,和投掷分析。
    The prevalence and severity of baseball-related injuries in the youth athlete population continue to escalate, despite efforts by health care professionals and sports organizations to quell this trend. This article reviews current research that has investigated the risk factors and possible prevention strategies for the most common injuries in young baseball players, including strengthening programs, pitch count guidelines, and throwing analysis.
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  • 文章类型: Journal Article
    在美国,儿童和青少年运动员的伤害继续上升,随着全年体育参与的增加,早期的体育专业化,和神经肌肉训练计划的机会不足。在此设置中,磁共振成像(MRI)的使用提供了关键的诊断工具.本文介绍了MRI在诊断常见的儿科和青少年运动损伤中的应用,并介绍了与这些病理相关的影像学发现。
    Injuries in pediatric and adolescent athletes continue to rise in the United States, with increases in year-round sports participation, earlier sport specialization, and inadequate access to neuromuscular training programs. In this setting, the use of magnetic resonance imaging (MRI) provides a critical diagnostic tool. This review article describes the utility of MRI in diagnosing common pediatric and adolescent sports injuries and presents imaging findings associated with these pathologies.
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  • 文章类型: Journal Article
    背景:高架运动员经常在极限运动范围内的位置进行快速而有力的投掷高架击球,增加上肢损伤的风险。Kerlan-Jobe骨科诊所(KJOC)肩肘评分已被证明是有效且可靠的问卷,可用于评估参与高要求高架运动的患者上肢的功能状态。然而,KJOC已被翻译成其他几种语言,希腊版本的KJOC尚不可用。方法:KJOC将按照国际准则在跨文化上适应希腊语。将招募至少100名有或没有肩膀或肘部投诉的头顶运动员,并要求他们两次填写希腊语版本的KJOC和手臂残疾,肩手问卷(DASH)一次。内部一致性和重测可靠性将使用Cronbach的α和组内相关系数(ICC)进行检查,分别。将计算测量的标准误差(SEM)和最小可检测变化(MDC),并检查可能的地面或天花板效应。将使用Pearson的相关性与希腊DASH评估收敛有效性。结果:这项研究的结果将在稍后发表的文章中发表。结论:本报告描述了KJOC希腊语版本的翻译和跨文化适应过程。我们相信研究方案将有助于该领域的研究人员改善类似研究的报告,从而提高研究质量。
    Background: Overhead athletes frequently perform rapid and powerful throwing overhead strokes in positions at the extreme range of motion, increasing the risk of upper limb injury. The Kerlan-Jobe Orthopedic Clinic (KJOC) Shoulder and Elbow Score has shown to be a valid and reliable questionnaire that can be used for the assessment of the functional status of the upper limb of patients involved in highly demanding overhead sports. The KJOC has been translated into several other languages however, a Greek version of the KJOC is not available yet. Methods: The KJOC will be cross-culturally adapted into Greek following international guidelines. At least 100 overhead athletes with or without shoulder or elbow complaints will be recruited and asked to fill in the Greek version of the KJOC twice and the Disabilities of Arm, Shoulder and Hand Questionnaire (DASH) once. The internal consistency and the test-retest reliability will be examined using Cronbach\'s alpha and the intraclass correlation coefficient (ICC), respectively. The standard error of measurement (SEM) and the minimum detectable change (MDC) will be calculated and possible ground or ceiling effects will be also examined. Convergent validity will be evaluated with the Greek DASH using Pearson\'s correlation. Results: The results of this study will be presented in an article to be published later. Conclusions: This report describes the process of translation and cross cultural adaptation of the Greek version of the KJOC. We believe a study protocol will assist researchers in the field to improve the reporting of similar studies and as a result improve the quality of their studies.
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  • 文章类型: Journal Article
    美国有280万青年游泳运动员,肩部疼痛是游泳者中最常见的抱怨。
    为了确定肩痛的患病率,残疾,以及青少年游泳运动员的不满。第二个目的是确定年龄的影响,竞技游泳经验,既往有肩痛或肩痛损伤史,残疾,和不满,最后确定性别,地理区域,参与第二项运动与肩部疼痛有关,残疾,和不满。
    多点横截面设计。
    来自美国六个州的六百七十一名9-17岁游泳者完成了包括人口统计在内的调查,宾夕法尼亚大学肩关节评分(PSS)和手臂肩手(DASH)运动的残疾。独立t检验用于比较疼痛,残疾,不满,年龄的影响,性别,参与第二运动,地理区域,和肩痛史。进行线性回归分析以确定这些变量与报告的疼痛和残疾的相互作用。
    49%的游泳者有肩部症状。据报道,与9至10岁相比,15至17岁的人肩痛和残疾更大(疼痛和残疾:p<0.001),在经验较多与较少的游泳者中(疼痛和残疾:p<0.001),以及来自东部和西部州的游泳者(疼痛:p=0.001,残疾:p=0.0014)。不参加第二项运动的游泳者肩部不满意较高(p=0.002)。既往肩痛/外伤史是疼痛加重的最佳指标,残疾,和不满意(p<0.001)。
    接受调查的游泳者中,几乎有一半患有肩痛,老年人群的患病率较高,那些有更多经验的人,以及先前有肩痛或外伤的人。进一步的研究应该调查肩痛的预防方案,建议采用监测方法来识别可能从转诊中受益的有症状的游泳者,以防止进一步的疼痛和残疾。
    III.
    UNASSIGNED: There are 2.8 million youth competitive swimmers in the United States (US), and shoulder pain is the most common complaint among swimmers.
    UNASSIGNED: To determine prevalence of shoulder pain, disability, and dissatisfaction in youth competitive swimmers. A secondary purpose was to determine influence of age, competitive swimming experience, and previous history of shoulder pain or injury on shoulder pain, disability, and dissatisfaction, and finally to determine if sex, geographic area, and participation in a second sport relate to shoulder pain, disability, and dissatisfaction.
    UNASSIGNED: Multi-site cross-sectional design.
    UNASSIGNED: Six-hundred and seventy-one swimmers aged 9-17 years from six states in the US completed surveys which included demographics, the Penn Shoulder Score (PSS), and the Disability of Arm Shoulder Hand (DASH) Sports. Independent t-tests were used to compare pain, disability, dissatisfaction, the influence of age, sex, participation in second sport, geographic region, and history of shoulder pain. Linear regression analyses were performed to determine the interaction of these variables with reported pain and disability.
    UNASSIGNED: Forty-nine percent of swimmers had shoulder symptoms. Greater shoulder pain and disability were reported in 15 to 17-year-olds compared to 9 to 10-year-olds (pain and disability: p<0.001), in swimmers with greater versus less years of experience (pain and disability: p<0.001), and in swimmers from eastern versus western states (pain: p=0.001, disability: p=0.0014). Swimmers not participating in a second sport had higher shoulder dissatisfaction (p=0.002). History of prior shoulder pain/traumatic injury was the best indicator of increased pain, disability, and dissatisfaction (p<0.001).
    UNASSIGNED: Almost half of swimmers surveyed had shoulder pain, with a higher prevalence found in older age groups, those with greater experience, and in those with prior shoulder pain or traumatic injury. Further research should investigate shoulder pain prevention programs, and surveillance methods are recommended to identify symptomatic swimmers who may benefit from referral to prevent further pain and disability.
    UNASSIGNED: III.
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  • 文章类型: Journal Article
    目的:我们旨在开发和评估一种新的诊断方法,“鸡翅肌肉上升测试”,与目前使用的唇唇损伤的临床测试相比,提高了唇唇关节破裂(GLAD)病变的诊断准确性。
    方法:对2021年7月至2022年7月期间在一个中心接受关节镜手术的85例患者进行了术前评估。术前临床检查的诊断表现(鸡翅肌肉上升试验,O\'Brien测试,曲柄试验,和O\'Driscoll检验)根据关节镜检查的结果进行了验证。
    结果:本研究的85例患者中有12例经关节镜检查证实为GLAD病变。鸡翅肌肉上升试验对GLAD病变的敏感性(83.33%)明显高于O\'Brien试验(33.33%),但不是曲柄试验(50.00%)或O\'Driscoll试验(25.00%),特异性(95.89%)明显高于O\'Brien检验(75.34%),曲柄试验(82.19%),和O\'Driscoll测试(71.23%)。鸡翅肌肉上升试验受试者工作特征曲线下面积最大(AUC=0.896,P<0.001;O'Driscoll试验AUC=0.543,P>0.05;曲柄试验AUC=0.661,P>0.05;O'Brien试验AUC=0.481,P>0.05),表明GLAD病变的诊断效能明显优于其他三种测试。
    结论:鸡翅肌肉上升试验是一种可靠的诊断方法,可提高GLAD病变诊断的准确性。
    OBJECTIVE: We aimed to develop and evaluate a new diagnostic method, the \'chicken-wing muscle up test\', to improve the accuracy of diagnosis of glenolabral articular disruption (GLAD) lesions compared to currently used clinical tests for injuries to the labrum.
    METHODS: Preoperative evaluations were conducted on 85 patients undergoing arthroscopic surgery at a single center between July 2021 to July 2022. The diagnostic performance of the preoperative clinical examinations (chicken-wing muscle up test, O\'Brien test, crank test, and O\'Driscoll test) were validated against the findings of arthroscopic examinations.
    RESULTS: 12 of the 85 patients in this study had arthroscopically confirmed GLAD lesions. The chicken-wing muscle up test demonstrated significantly higher sensitivity (83.33%) for GLAD lesions than the O\'Brien test (33.33%), but not the crank test (50.00%) or O\'Driscoll test (25.00%), and significantly higher specificity (95.89%) than the O\'Brien test (75.34%), crank test (82.19%), and O\'Driscoll test (71.23%). The chicken-wing muscle up test had the largest area under the receiver operating characteristic curve (AUC = 0.896, P < 0.001; O\'Driscoll test AUC = 0.543, P > 0.05; crank test AUC = 0.661, P > 0.05; O\'Brien test AUC = 0.481, P > 0.05), indicating significantly better diagnostic efficacy for GLAD lesions than the other three tests.
    CONCLUSIONS: The chicken-wing muscle up test is a reliable diagnostic method that improves the accuracy of diagnosis of GLAD lesions.
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  • 文章类型: Journal Article
    尽管牙医一致认为,视觉辅助设备不仅可以改善视力,还可以帮助改善姿势,证据很少。这项研究旨在评估视觉辅助设备(放大镜和显微镜)对牙冠准备过程中牙医对幻影头每个象限的牙形第一磨牙的肌肉工作量的影响,考虑到牙医的肌肉,患者的牙齿位置和表面。来自一家三级医院的六名惯用右手的牙医参加了会议。体表肌电图仪记录双侧上斜方肌的肌肉负荷,胸锁乳突,宫颈勃起脊髓,和牙冠准备期间的前三角肌。结果表明,与肉眼相比,使用显微镜时,所有检查的肌肉的工作量显着降低(p<0.05),而放大镜显示某些特定肌肉的工作量减少。所有视觉辅助设备工作量最大的肌肉是宫颈竖脊肌,其次是上斜方肌。当通过牙齿表面分析时,虽然与每个表面的肉眼相比,放大镜并没有显着减少整体工作量,显微镜显着减少大多数表面的工作量(p<0.05)。因此,在冠准备期间,使用放大镜或显微镜可以成功地减少所研究肌肉的工作量。
    Although there is consensus among dentists that visual aids not only improve vision but also help improve posture, evidence is scarce. This study aimed to evaluate the effect of visual aids (loupe and microscope) on the muscle workload of dentists during crown preparation on dentiform first molars in each quadrant of a phantom head, considering dentists\' muscles, patients\' tooth positions and surfaces. Six right-handed dentists from a single tertiary hospital participated. Surface electromyography device recorded the muscle workload of the bilateral upper trapezius, sternocleidomastoid, cervical erector spinae, and anterior deltoid during crown preparation. The results showed significantly lower workload in all examined muscles when using a microscope compared to the naked eye (p < 0.05), whereas the loupe showed reduced workload in some specific muscles. The muscle with the highest workload for all visual aids was the cervical erector spinae, followed by the upper trapezius. When analyzed by tooth surface, while the loupe did not significantly reduce overall workload compared to the naked eye for each surface, the microscope significantly reduced workload for most surfaces (p < 0.05). Therefore, during crown preparation, the workload of the studied muscles can successfully be reduced with the use of a loupe or microscope.
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