• Maxillofacial Plastic and Reconstructive Surgery
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• 제36권5호
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• pp.230-236
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• 2014

Esthetic reconstruction of cleft lip nose deformity is a challenging task in surgical management of patients with orofacial cleft. The author reconstructed cleft lip nose deformity effectively using autogenous auricular cartilage and a relatively new graft material of porcine dermal collagen, $Permacol^{TM}$. After correction of the deformed lower third of the nose with patient's auricular cartilage, we applied $Permacol^{TM}$ to augment the entire nasal dorsum. Three patients were treated and followed for up to five years. All patients improved in nose aesthetics without any inflammatory or immunogenic reaction. The author suggests that the use of $Permacol^{TM}$ for nasal profile augmentation in the treatment of cleft lip nose deformity is an alternative surgical strategy with minimal surgical invasiveness. The author report long-term experience with combined use of auricular cartilage and $Permacol^{TM}$ in nasal reconstruction for cleft lip nose deformity.

• Tribology and Lubricants
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• 제31권3호
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• pp.102-108
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• 2015

In this research, we experimentally investigated the sealing performance of elastomeric rotary lip seals for washing machines. In general, NBR is used as a material for elastomeric rotary lip seals in washing machines, but the mixing formula of the rubber material can affect the sealing performance. In this study, we manufactured rotary lip seals using three kinds of NBRs with a different mixing formula, and examined the sealing performance using an acceleration test mode. The results of an SEM investigation into the surfaces of three kinds of specimens showed a much smaller wear volume and better sealing performance for the specimens with smaller particle sizes of mixing composition than for the specimen with the larger. Repeated deformation and recovery by the shaft-to-seal eccentricity on rotation were shown to cause a phase difference in the rubber material, and we measured the recovery ratio to find the influence of this phase difference on the sealing performance. As another method for checking the phase difference, we also measured tan ä, and a lower tan ä was revealed as the recovery ratio increased for each specimen. Specimens with a higher recovery ratio (lower tan ä) were shown to have a better sealing performance. Consequently, specimens with a smaller particle size in the mixing composition had a better sealing performance because they show a higher recovery ratio.

• 대한치과교정학회지
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• 제27권5호
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• pp.723-732
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• 1997

본 연구의 목적은 악안면유형에 따라 측모 연조직 양상에 차이가 있는지를 알아보고자 17세 이상의 연령을 가진 다양한 수직적 양상을 보이는 II급 및 III급 남,녀 79명을 선택하여 각 계측치를 계측하고 통계 처리하여 다음과 같은 결과를 얻었다. 1. Nasolabial angle, interlabial angle, lower lip angle, mentolabial angle, symphyseal angle이 골격성 II급군과 III급군간에 유의한 차이를 보였고, nasofrontal angle, upper lip angle, mentolabial angle, symphyseal angle이 high angle군과 low angle군간에 유의한 차이를 보였다. 2. 악골의 시상적관계를 나타내는 ANB값이 연조직의 nasolabial angle, symphyseal angle, interlabial angle과 정상관 관계를 보였고, lower lip angle과는 역상관 관계를 보였다. 3. 악골의 수직적관계를 나타내는 SN-GoMe값은 연조직의 mentolabial angle, symphyseal angle, nasofrontal angle, upper lip angle과 정상관 관계를 보였다. 4. 골격성 III급군에 비해 II급군에서 SN-GoMe값에 따른 측모연조직 양상의 차이가 현저하였다.

• Journal of Oral Medicine and Pain
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• 제34권3호
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• pp.277-294
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• 2009

본 연구의 목적은 II급 청소년, 성인 환자에서 발치와 비발치 후 연조직 변화를 비교하기 위한 것이었다. 원광대학교 치과병원 교정과에 내원한 환자 68명을 각각 청소년발치군, 청소년비발치군, 성인발치군, 성인비발치군으로 분류하여 치료 전후의 측모 두부방사선사진을 계측하였다. 각 군의 치료 전후를 비교하고 각 군 간의 변화량을 비교하였으며, 그 중 통계적으로 유의한 변수들의 상관성과 회귀분석을 하여 다음과 같은 결과를 얻었다. 청소년과 성인의 발치군에서 비순각은 유의하게 증가하였고 비발치군에서는 유의하게 감소하였다. 발치군에서는 vertical-U1과 E line-upper lip의 변화량 간에, vertical-U1과 E line-lower lip의 변화량 간에, vertical-L1과 vertical-Li의 변화량 간에 양의 상관관계를 보였다. 또한 발치군에서 회귀분석을 통해 E line-upper lip, E line-lower lip, Li에 대한 단순회귀방정식이 도출되었다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제23권3호
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• pp.263-269
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• 2001

하순 및 하악골 정중열은 매우 드문 선천성 기형으로 , 하순절흔에서부터 하악은 물론 경부, 흉부까지 연장되어 다양하게 나타날 수 있으며, 원인은 확실하지 않으나 정중부로의 중배엽의 침투 실패, 하악돌기의 유합부전 그리고 외부 요인들이 논의되고 있다. 치료방법 및 시기에 관해서는 임상소견이 다양하고 증례가 드물기 때문에 많은 논란이 있어왔다. 그러나 현재의 경향은 연조직 기형은 연하 및 발음의 기능적 장애를 예방하기 위하여 가능한 조기에 치료하며, 악골고정을 위한 강선 결찰 혹은 골이식술은 사춘기 후로 미루는 추세이다. 본 교실에서는 저작 장애를 주소로 내원한 8세 여자 환자의 임상소견에서 하악골 정중열과 하순의 수술로 인한 반흔조직 및 하순에서부터 치조골을 가로지르는 섬유성 소대 등을 발견할 수 있었으며, 하악의 정중열을 장골 이식을 이용 하여 양호한 결과를 얻을 수 있었으며, 추후 하순과 순. 설측 전정의 연조직 기형은 심미성과 기능 향상을 위해 부가적인 술식이 필요하리라 생각된다.

• 한국통신학회논문지
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• 제29권6C호
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• pp.834-841
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• 2004

화자의 입술영상에는 카메라와 화자의 위치나 자세로 인하여 정상적인 입술이 기하학적으로 변환될 수 있다. 이러한 변환은 본래 입술위상의 기하학적 정보를 변경시킨다. 따라서 기하학적으로 변환된 입술모양을 보정하는데 부분적인 입술위상정보를 사용함으로써 전체 입술정보를 개선하고자, 본 논문에서는 입술모양의 기하학적 보정 기법을 제안한다. 제안한 기법은 특징결정 단계와 보정 단계로 구성된다. 특징결정 단계에서는 원영상과 목표영상의 입술모델에 따라 원영상의 특징점과 특징을 추출하고 목표영상의 특징점과 특징을 결정한다. 보정단계에서는 이전 단계에서 추출한 정보를 기반으로 영상을 부분영상으로 분할하고 사상 후 보정된 영상을 통합한다. 실험영상은 6개의 한국어 단모음 발음에 대한 동영상 프레임이고 알고리즘 평가를 위하여 입술의 좌우 대칭성을 활용한다. 실험 결과, 윗입술보다는 아랫입술의 보정률, 입술의 움직임이 작은 발음보다는 움직임이 큰 발음의 보정률이 높게 개선되었다.

• 대한치과교정학회지
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• 제24권3호
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• pp.547-554
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• 1994

This study was carried out in order to find out the soft tissue profile changes associated with maxillary incisor retraction in Angle's class I malocclusion patients. For this study fifty two female adult patients (Maximum Retraction Group 23, Minimum Retraction Group 29) who received orthodontic treatment were chosen. Following conclusions were obtained by analysing the changes of soft tissue and hard tissue before and after treatment. 1. When considering the mean changes of soft tissue and hard tissue, UP, LIP, Ls, Li (p<0.001), Point B, Si (p<0.01), Point A, Ss (p<0.05) were significant posterior movement in Maximum Retraction Group and UIP (p<0.001), LIP, Ls, Li (p<0.01), Point B, Si (p<0.05) were significant posterior movement in Minimum Retraction Group. 2. When considering the correlations between hard tissue and soft tissue changes, greater correlations were found in Minimum Retraction Group between UIP and Ls (p<0.01), Point A and Ss, UIP and Li, Point B and Si (p<0.05) than Minimum Retraction Group. 3. Correlations (p<0.01) were found between upper incisor retraction and posterior movement of the upper and lower lip in Thin Lip-Thickness Group, whereas no significant correlations were found in Thick Lip-Thickness Group. 4. Mean changes of the soft tissue thickness subsequent to incisor retraction were increased (p<0.01) in upper lip (Ls-Ls'), whereas no changes were found in lower lip.

• 대한소아치과학회지
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• 제26권3호
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• pp.507-512
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• 1999

혼합치열기의 소아환자의 경미한 하악 전치부의 총생을 해결하는 문제와 하악 제 2 유구치의 조기 상실로 인한 하악 제 1 대구치의 근심경사 그리고 이에 따른 제 2 소구치의 맹출 공간 부족 등을 해소하기 위한 여러 가지의 방법들이 시도되어왔지만 저마다 그 술식의 적용범위나 방법 등에는 많은 어려움 들이 있어왔다. 이 연구의 목적은 이런 선택의 어려움을 가만하여 실제 임상에서 보다 간편하고 환자의 불편감을 줄여줄 수 있는 한 방법으로 Lip Bumper를 이용한 술식을 소개하고 그 적용례를 통하여 성공과 실패 사례들을 소개함으로써 임상가들에게 보다 유익한 정보를 주기 위함이다.

• 치과방사선
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• 제23권1호
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• pp.103-114
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• 1993

The purpose of this study was to determine whether any difference existed in craniofacial morphology between parents of children with cleft lip and/or palate and parents of children without cleft lip and/or palate as well as the characteristics of craniofacial morphology in parents of children with cleft lip and/or palate. Thirty three measurements of the various regions of cranium and face were obtained from lateral cephalometric radiograms in parents of 28 children with cleft lip and palate, 18 children with cleft lip, and 22 children with cleft palate. There were 28 couples and 40 single parents in this sample. There were 92 individuals including 41 males and 51 females. The measurements were compared with those in control subjects, including 40 adult males and 40 adult females, who had no history of craniofacial abnormalities. The total sample was compared for the sex independently. The obtained results were as follows. 1. In the cranium, both parents of cleft children had significantly shorter posterior cranial base length(S-Ba). 2. In the upper face, a significantly shorter anteroposterior length of maxilla(A'-Ptm'), particularly in the anterior region (A'-K), anterior facial depth(A-SBaL), posterior facia! height(Ptm'-SNL) and relation of subnasale to the cranial base (∠BaN'Sn) were noted in fathers of cleft children. But, all measurements were not found to be significantly different between experimental group and control group in all mothers. 3. In the lower face, both parents of cleft children showed a significantly greater Y axis angle(∠NSGn) and ramal plane angle(∠SNL-RP) in fathers of cleft children. Thus both patents showed a posteriorly rotation of mandible. The thickness of the lower lip(B-B') was significantly thicker in fathers of cleft children. 4. In the facial profile, a significantly shorter posterior facial height(S-Go) and greater angle of soft tissue facial convexity (∠BaN'Pog') were noted in the fathers of cleft children. But, all measurements were not found to be significantly different between experimental group and control group in all mothers.

• 대한치과교정학회지
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• 제49권4호
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• pp.222-234
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• 2019

Objective: To investigate the three-dimensional lip vermilion changes after extraction and non-extraction orthodontic treatment in female adult patients and explore the correlation between lip vermilion changes and incisor changes. Methods: Forty-seven young female adult patients were enrolled in this study (skeletal Class III patients were excluded), including 34 lip-protruding patients treated by extraction of four first premolars (18 patients requiring mini-implants for maximum anchorage control and 16 patients without mini-implants) and 13 patients requiring non-extraction treatment. Nine angles, seven distances, and the surface area of the lip vermilion were measured by using pre- and post-treatment three-dimensional facial scans. Linear and angular measurements of incisors were performed on lateral cephalograms. Results: There were no significant changes in the vermilion measurements in the non-extraction group. The vermilion angle, vermilion height, central bow angle, height/width ratio, and vermilion surface area decreased significantly after the orthodontic treatment in the extraction groups, but the upper/lower vermilion proportion remained unchanged. Significant correlations were found between the changes in incisor position and those in vermilion angles, vermilion height, and surface area. Conclusions: Extraction of the four first premolars probably produced an aesthetic improvement in lip vermilion morphology. However, the upper/lower vermilion proportion remained unchanged. The variations in the vermilion were closely related to incisor changes, especially the upper incisor inclination changes.