• 대한소아치과학회지
• /
• 제32권2호
• /
• pp.229-235
• /
• 2005

흡지벽, 수직적인 골격 발육부전 등 여러 원인을 갖는 개방교합은 치아와 치조돌기에 국한되어 있는 단순 개방교합, 수직골격 발육부전에 의한 골격성 개방교합인 복잡 개방교합으로 나눌 수 있다. 단순 개방교합은 흡지벽, 농설벽 등 국소적 원인에 의하며 치조돌기의 수직적 발육결여와 상하악 잔치의 맹출 장애 등의 특징을 보인다. 농설벽은 혀가 상하악 전치 사이에 위치하고 혀의 주변부위가 구치부 교합면 사이에 놓이지 못하게 됨으로써 구치부 과맹출에 의한 전치부의 개방교합과 상악전치의 전돌을 가속화하게 된다. 악습관에 의한 개방교합을 가진 어린이에서는 습관을 없애주는 것이 개방교합을 치료하는 가장 좋은 방법일 것이다. 그리고 Hawley type 장치에 crib을 첨가하거나 oral screen을 장착시켜 농설벽을 치료할 수 있다 그리고 근기능요법은 동기유발과 혀의 기능을 조절하고 입술운동을 통해 새로운 연하운동을 발전시키도록 훈련하여 부정교합을 교정하거나 개방교합의 재발을 방지한다. 본 증례는 농설벽에 의한 개방교합을 가진 8세 여자 환자에서 탄성고무, 빨대를 이용한 연하연습과 발음연습을 포함한 근 기능요법과 습관제거장치를 이용해 습관의 중지 및 개방교합의 개선을 얻었기에 보고하는 바이다.

• 대한치과교정학회지
• /
• 제18권2호
• /
• pp.475-488
• /
• 1988

Certain malocclusion are associated with specific "facial type," and it is important for the clinician to classify the common facial characteristic of each patient. Because the reaction to treatment mechanics and the stability of the denture is depended upon the analysis of the facial pattern. Basically, there are 3 district facial types or patterns under which almost all malocclusion can be classified. 1. mesofacial is the most average growth. 2. brachyfacial which is a horizontal growth pattern has a week muscle, with dental arch, deep bite. 3. dolichofacial which is a vertical growth pattern has a strong muscle, narrow dental arch, open bite. Brachyfacial pattern show a resistant to mandibular rotation during treatment can accept a more protrusive denture and are prominantly nonextraction, whereas dolichofacial patterns tend to open during treatment require a more retracted denture in order to assure post-treatment stability. Brachyfacial pattern would better treat to use extrusive force system, whereas dolichofacial pattern treat to use intrusive force system with head gear and intermaxillary elastics.

• 대한장애인치과학회지
• /
• 제5권2호
• /
• pp.96-99
• /
• 2009

Macroglossia is a tongue pathology of multiple etiology as systemic disease like cerebral palsy and Down syndrome etc. It can cause abnormal oral conditions including anterior open bite or dyspnea by changing occlusion and oral habits. So many handicapped children who have macroglossia need to get surgery of large tongue to improve esthetics, function, and treatment stability. The purpose of this report is to evaluate 2 patients, one has cerebral palsy and the other lymphangioma, who have experience of glossectomy with review of literature.

• 대한치과의사협회지
• /
• 제10권6호
• /
• pp.373-377
• /
• 1972

The patient, a 17-year old Korean male, had difficulty in mastication, and a protruding lower jaw combined with open bite. Cosmetic complaint was right displacement of mandible. He was corrected by reversed L-shaped bilateral Osteostomy in ascending ramus.

• 대한치과의사협회지
• /
• 제10권2호
• /
• pp.91-96
• /
• 1972

The tests on the oral capacties which are divided into five groups on centric occlusion position, physiologic rest position, two mm open bite position, four mm open bite position, and maximum opening position of the mandible were conducted on the one hundread normal dental college students and staffs. The aims were to study the changeability of the fundamental oral structure, to get some helpful informations for the full denture wearers and related physiology, and also to find out further experimental standards. The results were as follows; 1. There was also some volumetric space in centric occlusion position. 2. The greater the voluntary opening degree of the mandible was, the greater the oral volumetric capacity was. 3. There were no correlations between the oral capacity and height, weight, and cheek thickness. 4. There were no correlations between the centric occlusion position and physiologic rest position, and voluntary positions of the mandible. 5. The inserted material into the oral cavity was much influential to the physiologic rest position.

• 대한치과교정학회지
• /
• 제19권3호
• /
• pp.147-160
• /
• 1989

Long face patients are characterized by excessive anterior facial height, lip incompetence at rest, anterior open bite, and gummy smile. A major problem is an inferior rotation of the posterior maxilla and upper molars. Long face patients have been the most difficult for orthodontist to treat successfully. In growing patients, the methods for impeding excessive vertical growth have been used high pull head gear, functional appliance, and combined type of two. One significant improvement comes from using a full arch splint to deliver force to the maxilla more vertically. In adult patients, orthodontic camouflage treatment is biomechanically difficult and doesn't work when the problem is primarilly vertical. Surgical maxillary impaction provides a means for successfully treating most of problems. Also, superior reposition of the chin via a mandibular inferior border osteotomy is effective in decrease of lower anterior facial height and correction of the poor chin-lip balance. Post-surgical stability and the physiologic response are good. The coordinated orthodontic and surgical treatment is necessary for solution the difficult skeletal deformity.

• 한국소성가공학회:학술대회논문집
• /
• 한국소성가공학회 1995년도 추계학술대회논문집
• /
• pp.157-166
• /
• 1995

A large crank shaft for ship engine consists of several components, such as throw, jornal, pin and flange. These compoents are individually made by open-die forging followed by machining and they are thermally fitted to form the crankshaft. In the present investigation, it was attempted to design an optimum preform for the throw by use of the spread coefficient. The spread coefficient found in the literature was confirmed by comparison with experimental results using plasticine. However, the preform designed by the spread coefficient was unable to produce the final product. The reason was found that the spread coefficient differs distinctly for the magnitude of bite ratio. Therefore, another spread coefficient, especially for low bite ratios, was proposed and the preform was redesigned. It was found that the new preform was able to produce the final product.

• 대한치과의사협회지
• /
• 제16권9호통권112호
• /
• pp.675-681
• /
• 1978

• 대한치과교정학회:학술대회논문집
• /
• 대한치과교정학회 2005년도 제38회 학술대회
• /
• pp.69.1-69.1
• /
• 2005

• 구강회복응용과학지
• /
• 제39권2호
• /
• pp.104-104
• /
• 2023