• Clinics in Shoulder and Elbow
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• 제17권4호
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• pp.209-217
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• 2014

Most studies on the pathophysiology, natural history, diagnosis by imaging and outcomes after operative or nonoperative treatment of rotator cuff tear have focused on those of full-thickness tears, resulting in limited knowledge of partial-thickness rotator cuff tears. However, a partial-thickness tear of the rotator cuff is a common disorder and can be the cause of persistent pain and dysfunction of the shoulder joint in the affected patients. Recent updates in the literatures shows that the partial-thickness tears are not merely mild form of full-thickness tears. Over the last decades, an improved knowledge of pathophysiology and surgical techniques of partial-thickness tears has led to more understanding of the significance of this tear and better outcomes. In this review, we discuss the current concept of management for partial-thickness tears in terms of the pathogenesis, natural history, nonoperative treatment, and surgical outcomes associated with the commonly used repair techniques.

• Clinics in Shoulder and Elbow
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• 제27권1호
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• pp.79-87
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• 2024

Rotator cuff disease is a common cause of shoulder pain for which partial-thickness rotator cuff tears occupy a significant proportion. Such tears are often difficult to diagnose and manage in the general clinic setting. A review of the available literature from well-known databases was performed in this study to provide a concise overview of partial-thickness rotator cuff tears to aid physicians in their understanding and management.

• Journal of Periodontal and Implant Science
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• 제10권1호
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• pp.37.2-37.2
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• 1980

• 대한영상의학회지
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• 제82권6호
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• pp.1366-1387
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• 2021

회전근개 부분 파열의 자기공명영상 해석은 종종 애매한 경우가 있다. 이 종설에서는 회전근개 중 극상건과 극하건에 초점을 맞춰, 회전근개 부분 파열의 진단을 위한 해부학적 고려 사항을 설명하고, 회전근개 부분 파열의 분류를 요약하며, 박리(delamination)가 포함된 회전근개 부분 파열의 최신 개념을 개략적으로 설명하였다.

• 대한치과기공학회지
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• 제30권2호
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• pp.47-56
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• 2008

This is a research for thickness change of denture base according to the shape of sprue & investment position of denture base in flask when injecting polyamid base resin for flexible partial denture as a part of study for Valplast among the flexible partial denture with a nylon base. It has been introduced several kinds of flexible partial denture product with a nylon base, but Valplast is the most widely used product among them. Valplast has been the most generally used material today since developed in 1950s in the United States as a material for flexible partial denture. Valplast is much more aesthetic than general metal-acrylic partial denture due to its translucent pink color and biocompatibility in terms of material characteristic. It keeps its flexibility for a long time after production, imposes a less burden on the teeth used as abutment, and it can be easily insert and remove due to its particular suppleness. Moreover, it is felt like real teeth more than metal-acrylic partial denture when being put in and takes alveolar bone under good protection since it receives occlusal force equally under the denture base. The most outstanding feature of Valplast is flexibility. The extent of its flexibility is determined by width & thickness of denture base. Considering general working procedure of Valplast, it can be seen that the thickness of denture base formed out of wax is increasing by the pressure while injecting resin. This research is to decide and test on the thickness increasing of Valplast by injecting pressure and the hypothesis upon that and is to prepare the basis estimating the increasing extent of thickness of denture base on the basis of the test result. In this test, it is expected occlusal malposition & thickness increasing of denture base by injecting pressure according to 4 kinds of test data which are to select 3 types of sprue method settling the forefront position at which the test material of fixed standard can be invested and to position the test material at the rearmost part keeping the minimum distance to set sprue. For 4 kinds of injecting test by investment position & sprue type, 20 test materials, 5 for each test were produced and a pressure of 1,180Kg was given with automatic injector of air cylinder type. The results are as follows: 1. For the amount of thickness increasing of denture base by investment position, the thickness of front investment is less increasing than the one of rear investment. 2. For the amount of thickness increasing of denture base by sprue type, the thickness of straight decompression sprue type which can absorb the injecting pressure after injecting polyamide base resin is less increasing than the other sprue types.

• 대한정형외과학회지
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• 제55권5호
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• pp.426-430
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• 2020

극상건의 부분 파열(partial thickness tear)이 자기공명영상이나 Middleton, Crass position하의 정적초음파영상에서는 관찰되지 않는 경우가 있다. 저자들은 견관절의 extension position에서 저항 scaption (resisted scaption 또는 scapular plane abduction)을 이용한 동적초음파 검사를 이용하면 다른 영상의학적 도구나 자세에서 진단을 놓칠 수 있는 극상건의 부분 파열도 효과적으로 관찰할 수 있음을 여러 증례를 통하여 경험하였다. 현재까지 극상건 부분 파열을 진단하기 위한 동적 검사 방법은 문헌으로 보고된 적이 없었던 바, 이에 두 증례를 통하여 저항 scaption을 이용한 동적 초음파에 대한 저자들의 술기를 보고하고자 한다.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.266-277
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• 1998

Forty-nine partial thickness rotator cuff tears underwent arthroscopic debridement or repair, and were followed up for a minimum of two years. Follow-up evaluations of the results were completed using a detailed functional questionnaire which was comprised of a rating of the UCLA shoulder scale and return to the previous sports activity and job. The average age of the 49 study patients was 46.5 years(range, 14 to 67 years). The patients were divided into four groups on the basis of the onset of the patient's symptoms. Thirty-five patients(72%) had partial tearing only on the articular surface, six(12%) on the bursal surface, and eight(16%) on both surfaces. Group I consisted of 21 patients with an average age of 56.7. Partial tearing in group I was attributed to the impingement syndrome. In group II, partial tearing of the rotator cuff was related to the anterior instability of the shoulder. This group included 9 patients with an average age of 27.9. In group III, all of the 8 patients were overhead athletes with an average age of 21.8. In this group, no isolated instances of significant trauma were related to the development of the shoulder pain. In group IV, 11 patients noted that a significant traumatic event preceded the onset of their pain. The average age of the patients was 34.9. Overall, 82% of the patients demonstrated satisfactory results and 18% revealed unsatisfactory results. The worst UCLA score and rate of return to the prior activity was noted in group III. In conclusion, partial thickness rotator cuff tear can be caused by subacromial impingement, instability, repetitive microtrauma, and macrotrauma. Arthroscopic debridement of partial tear of the rotator cuff provides a favorable outcome except in overhead athletes.

• Clinics in Shoulder and Elbow
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• 제12권1호
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• pp.38-43
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• 2009

목적: 회전근 개 부분 파열에 대한 정확한 진단을 위해서는 영상검사가 필수적이다. 이 논문의 목적은 자기공명 관절조영술과 관절경 소견을 비교하여 자기공명 관절조영술의 회전근 개 부분 파열에 대한 진단능력을 평가하는 데에 있다. 대상 및 방법: 신체 검사상 회전근 개 질환으로 의심되어 자기공명 관절조영술 및 관절경 수술이 시행된 177예의 환자를 대상으로 하였다. 파열의 자기공명 관절조영술 소견과 관절경 소견을 비교하여 회전근 개 파열의 위치에 따른 자기공명 관절조영술의 진단 능력을 평가하였다. 관절면 회전근개 부분 파열의 크기에 대한 일치도를 구하였다. 결과: 파열의 위치에 따라 관절면, 점액낭측 및 양면 파열의 3 군으로 분류하였으며 각각 56예, 26예, 17예였다. 자기공명 관절조영술은 관절면 회전근 개 부분 파열에 대한 민감도 82%, 특이도 88%를 보였으며 점액낭측 파열인 경우에는 민감도 11%, 특이도100%를 보였다. 관절면 회전근개 부분 파열의 크기에 대한 자기공명 관절조영술 소견과 관절경 소견의 일치도는 72%였다. 결론: 자기공명 관절조영술은 관절면 회전근 개 부분 파열의 진단에는 유용하나 점액낭측 파열의 진단에는 한계가 있었다.

• 소성∙가공
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• 제25권6호
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• pp.396-401
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• 2016

Recently, Multi-strength hot stamping process has been widely used to achieve lightweight and crashworthiness in automotive industry. In concept of multi-strength hot stamping process, process design of tailor rolled blank(TRB) in partial heating is difficult because of thickness and temperature variation of blank. In this study, springback prediction of TRB in partial heating process was performed considering its thickness and temperature variation. In partial heating process, TRB was heated up to $900^{\circ}C$ for thicker side and below $Ac_3$ transformation temperature for thinner side, respectively. Johnson-Mehl-Avrami-Kolmogorov(JMAK) equation was applied to calculate austenite fraction according to heating temperature. Calculated austenite fraction was applied to FE-simulation for the prediction of springback. Experiment for partial heating process of TRB was also performed to verify prediction accuracy of FE-simulation coupled with JMAK equation.

• 대한관절경학회지
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• 제6권2호
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• pp.126-130
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• 2002

목적 : 견봉하 점액낭에 가려져 부분층 파열로 여겼던 회전근개 전층 파열을 견관절 내 공기 주입 방식을 사용한 견봉하 점액낭 관절경적 관찰로 효과적인 진단의 가능 여부를 알아 보고자 하였다. 대상 및 방법 : 65예 중 견관절 관절경상 회전근 개 부분층 파열인 18예를 제 1군으로, 전층 파열로서 봉합을 시행 한 37예를 제 2군으로 나누어 견관절에 $50\~100ml$의 공기주입으로 확장을 시킴과 동시에 견봉하 관절내로 누출 되는 공기 방울을 관찰하였다. 결과 : 제 1군 중 3예에서 공기 누출을 보고 전층 파열임을 확인할 수 있었으며, 제 2군 중 2예에서는 다량의 공기 누출 부위가 발견되어 불완전한 봉합임을 확인하고 추가 봉합을 시행 할 수 있었다. 결론 : 공기 주입 방식은 회전근 개 부분층 파열과 전층 파열을 감별하고, 비후되고 유착된 점액낭에 가려져 있는 전층 파열을 발견할 수 있으며, 술 후 봉합 부위의 평가에 유용한 방법으로 사료된다.