• 대한소아치과학회지
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• 제37권2호
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• pp.218-224
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• 2010

어린이 영구전치의 법랑질 발육 결함이나 고정성 장치에 의한 교정치료 후 탈회 병소는 흔히 심미적 문제를 유발한다. 본 연구는 상악 전치부에 위 원인에 의한 탈회로 인하여 백반양 병소를 보이는 21명 어린이의 38개 치아를 대상으로, 최근 비침습적인 방법으로 소개된 resin infiltration 기법을 적용하고, 병소의 색조의 임상적 개선 효과를 비교, 분석하여 다음과 같은 결과를 얻었다. 1. 1주 후 색조가 개선된 병소는 발육 결함 병소의 25%, 교정 탈회 병소의 61%로 나타났다. 2. 발육 결함 병소의 40%, 교정치료 후 탈회 병소의 6%에서는 시술 전후의 색조변화를 관찰할 수 없었다. 3. 법랑질 발육결함 병소에서는 시술 직후 보다 1주 후에 더 많은 색조 변화를 관찰할 수 있었다. 결과적으로 일부 증례에서는 색조의 극적인 개선이 관찰되었으나, 또 일부 증례에서는 변화가 거의 나타나지 않았는데, 이는 병소 깊이의 차이에 기인한 것으로 사료되었다.

• Restorative Dentistry and Endodontics
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• 제44권4호
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• pp.38.1-38.8
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• 2019

Navigation of the main root canal and dealing with a dens invaginatus (DI) is a challenging task in clinical practice. Recently, the guided endodontics technique has become an alternative method for accessing root canals, surgical cavities, and calcified root canals without causing iatrogenic damage to tissue. In this case report, the use of the guided endodontics technique for two maxillary lateral incisors with multiple DIs is described. A 16-year-old female patient was referred with the chief complaint of pain and discoloured upper front teeth. Based on clinical and radiographic findings, a diagnosis of pulp necrosis and chronic periapical abscess associated with double DI (Oehler's type II) was established for the upper left lateral maxillary incisor (tooth #22). Root canal treatment and the sealing of double DI with mineral trioxide aggregate was planned for tooth #22. For tooth #12 (Oehler's type II), preventive sealing of the DI was planned. Minimally invasive access to the double DI and the main root canal of tooth #22, and to the DI of tooth #12, was achieved using the guided endodontics technique. This technique can be a valuable tool because it reduces chair-time and, more importantly, the risk of iatrogenic damage to the tooth structure.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제40권1호
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• pp.27-31
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• 2014

Various surgical techniques, such as endoscopic surgery and robotic surgery, are developed to optimize the esthetic outcome even in operations for malignancy. A modified face-lift or retroauricular approach are used to minimize postoperative scarring. Recently, robot-assisted surgery is being done in various fields and considered as favorable treatment method by many surgeons. However its high cost is a nonnegligible fraction for many patients. On the other hand, endoscopic surgery, which is cheaper than robotic surgery, is minimally invasive with contentable neck dissection. Although it is a difficult technique for a beginner surgeon due to its limited operation view, we suppose it as an alternative method for robotic surgery. Herein, we report two cases of endoscopic neck dissection via retroauricular incision with a discussion regarding the pros and cons of endoscopic neck dissection.

• 대한소아치과학회지
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• 제36권1호
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• pp.102-107
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• 2009

소아치과 임상에서는 제2유구치의 탈락 직후에 제1대구치 근심면을 직접 관찰하고 여기에 발생한 백반양 초기 우식병소를 목격할 기회가 많다. 유구치와는 달리, 잔존 기대수명이 매우 긴 제1대구치의 경우에는 근심면 초기 우식병소에 대하여 와동형성에 이은 전통적인 수복치료를 하거나 아무런 조치 없이 방관하는 것은 부적절할 것으로 사료되어, 본 연구는 이 시기 어린이들에 있어서 제1대구치 근심면 초기 우식의 유병률을 조사하고 이에 적합한 조치를 모색할 목적으로 시도되었다. 본 연구는 6개월간 부산대학교병원 소아치과에 내원한 어린이 중 제2유구치를 발거하여 제1대구치의 근심면을 직접 관찰할 수 있었던 어린이들의 124개 제1대구치를 대상으로, 근심면 백반양 초기 우식병소의 유병률을 조사하였다. 그리고 그 진행을 차단하기 위한 노력의 일환으로 평활면 초기 우식병소를 가진 치아 시편에 복합레진 접착제만 도포하거나 접착제에 이어 전색제를 도포하고 온도순환과 염색을 시행한 후, 단면을 통하여 미세누출 여부를 관찰하여 다음과 같은 결과를 얻었다. 1. 124개 관찰대상 치아 중 제1대구치 근심면이 건전한 경우는 34%에 불과하였으며, 백반양 초기 우식병소를 가진 것은 53%, 이미 우식와동이 확인된 것은 13%였다. 2. 접착제나 접착제와 전색제를 도포한 시료의 단면 관찰에서는 두군 모두에서 20% 정도의 미세 누출을 보였다. 결론적으로, 어린이 제1대구치 근심면의 초기 우식은 매우 높은 유병률을 보여 이에 대한 보다 적극적인 대처와 효율적인 비침습적 접근방법이 모색되어야 할 것으로 생각되었다.

• 대한치과교정학회지
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• 제48권1호
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• pp.57-62
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• 2018

Piezoelectric surgery is a novel surgical approach used in orthodontic treatment for rapid tooth movement. This paper presents a case series wherein osseous outgrowths were observed in response to piezosurgery-assisted en-masse retraction. Sixteen patients requiring upper premolar extractions were treated with miniscrew-supported en-masse retraction and received minimally invasive decortication via piezosurgery. Computed tomography (CT) of the maxillary anterior region was performed to investigate the nature of the outgrowths. In 8 of the 16 patients, hemispheric or disc-shaped osseous outgrowths were observed on the sites where piezosurgery was performed during retraction. CT images revealed that these outgrowths were alveolar bone. This case series presents a previously unreported osseous response to piezosurgery-assisted tooth movement during orthodontic treatment. The response is mostly transient and is observed in 50% of the treated patients, suggesting a bone turnover that can be assessed clinically and radiographically.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제37권
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• pp.14.1-14.11
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• 2015

The aim of this article is to review temporomandibular joint symptoms as well as the effects of orthognathic surgery(OGS) on temporomandibular joint(TMJ). The causes of temporomandibular joint disease(TMD) are multifactorial, and the symptoms of TMD manifest as a limited range of motion of mandible, pain in masticatory muscles and TMJ, Joint noise (clicking, popping, or crepitus), myofascial pain, and other functional limitations. Treatment must be started based on the proper diagnosis, and almost symptoms could be subsided by reversible options. Minimally invasive options and open arthroplasty are also available following reversible treatment when indicated. TMD manifesting in a variety of symptoms, also can apply abnormal stress to mandibular condyles and affect its growth pattern of mandible. Thus, adaptive developmental changes on mandibular condyles and post-developmental degenerative changes of mandibular condyles can create alteration on facial skeleton and occlusion. The changes of facial skeleton in DFD patients following OGS have an impact on TMJ, masticatory musculature, and surrounding soft tissues, and the changes of TMJ symptoms. Maxillofacial surgeons must remind that any surgical procedures involving mandibular osteotomy can directly affect TMJ symptoms, thus pre-existing TMJ symptoms and diagnoses should be considered prior to treatment planning and OGS.

• Journal of Dental Anesthesia and Pain Medicine
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• 제19권1호
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• pp.37-44
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• 2019

Objective: Arthrocentesis is a minimally invasive surgical procedure that is used to alleviate the symptoms of temporomandibular joint (TMJ) disorders. The aim of this study was to investigate the effect of arthrocentesis on the blood supply to the retinal structures. Materials and Methods: Arthrocentesis was performed on 20 patients with TMJ disorders, and choroidal thickness (CT) in patients was measured to evaluate retinal blood circulation. The blood volume of the retinal structures was evaluated ipsilaterally before and after arthrocentesis, and these measurements were then compared with measurements obtained from the contralateral side. Results: Before arthrocentesis, there were no differences in retinal blood volumes between the ipsilateral and contralateral sides (P = 0.96). When ipsilateral CT measurements taken before and after arthrocentesis were compared, retinal blood supply was found to have significantly decreased after arthrocentesis (P = 0.04). When contralateral CT measurements taken before and after arthrocentesis were compared, retinal blood supply was also found to have decreased after arthrocentesis, but not significantly (P = 0.19). Conclusion: The solution of local anesthesia with epinephrine applied before the arthrocentesis procedure was found to reduce the blood volume of the retinal structures. To the best of our knowledge, this is the first study that has investigated the blood volume of the retinal structures following arthrocentesis.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제49권4호
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• pp.214-217
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• 2023

Objectives: This case series aims to introduce the nasal floor approach for extracting inverted mesiodens. Materials and Methods: Through a retrospective chart review between January 2022 and February 2023, we included the mesiodens patients using nasal floor approach, and analysis the location of mesiodens from the anterior nasal spine (ANS), total operation time, and complications. Results: Each mesiodens was located 10 to 12 mm from the ANS and was covered with a cortical layer of the nasal floor. All mesiodens were successfully extracted without exposing the adjacent incisors or nasopalatine nerve within 30 minutes from draping to postoperative dressing. Conclusion: The nasal floor approach is an efficient extraction method that reduces bone removal and prevents anatomical damage while removing the mesiodens just below the nasal floor bone.

• 대한소아치과학회지
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• 제46권4호
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• pp.382-391
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• 2019

와동 형성이 시작된 우식병소에는 병소 본체 주변으로 탈회가 진행 중인 초기 병소가 혼재한다. 이 연구에서는 법랑질에 국한된 우식 와동을 복합레진으로 수복 시 레진침투법을 병행하는 기법이 치질 보존 측면에서 의미를 갖는지를 평가하고자 하였다. 인접면 우식병소가 있는 탈락된 유구치를 이용, 레진침투(I, Infiltration), 치아삭제(P, preparation), 복합레진 수복(F, filling)의 적용 순서를 달리하여 IPF군과 PFI군으로 나누었다. 수복 범위, 레진침투 양상, 변연부 미세누출의 관점에서 수복물을 평가하였다. 치질 삭제범위는 수복 전후에 micro-CT를 이용하여 평가하였고, 두 실험군 모두에서 치료 전 병소의 크기보다 복합레진 수복물의 크기가 작았다. 공초점 레이저 주사현미경을 이용한 레진침투 양상 평가 결과 두 실험군 모두 복합레진 수복물 주변에서 침투레진이 확인되었으며, 인공 탈회 유발 후에도 침투레진은 대부분 유지되었다. 수복물 변연부 미세누출은 micro-CT로 확인하였고, PFI군에서 더 빈번하게 확인되었다. 복합레진 수복과 레진침투법의 병용은 치질 보존 측면에서 의미를 가지며, 접착 향상을 위하여 레진침투-와동 형성-복합레진 수복의 순으로 진행하는 것이 추천된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제40권
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• pp.24.1-24.6
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• 2018

Temporalis tendon transfer is a technique for dynamic facial reanimation. Since its inception, nearly 80 years ago, it has undergone a wealth of innovation to produce the modern operation. Temporalis tendon transfer is a relatively minimally invasive technique for the dynamic reanimation of the paralyzed face. This technique can produce significant and appropriate movement of the lateral oral commissure, more closely mimicking the normal side. The aim of this article is to review the technique of temporalis tendon transfer involving transferring of the coronoid process of the mandible with the insertion of the temporalis tendon via intra-oral and transcutaneous approach.