• 제목/요약/키워드: Lip Contour

검색결과 27건 처리시간 0.032초

Upper lip tie wrapping into the hard palate and anterior premaxilla causing alveolar hypoplasia

  • Heo, Woong;Ahn, Hee Chang
    • 대한두개안면성형외과학회지
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    • 제19권1호
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    • pp.48-50
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    • 2018
  • Bony anomaly caused by lip tie is not many reported yet. There was a case of upper lip tie wrapping into the anterior premaxilla. We represent a case of severe upper lip tie of limited lip motion, upper lips curling inside, and alveolar hypoplasia. Male patient was born on June 3, 2016. He had a deep philtral sulcus, low vermilion border and deep cupid's bow of upper lip due to tension of short, stout and very tight frenulum. His upper lip motion was severely restricted in particular lip eversion. There was anterior alveolar hypoplasia with deep sulcus in anterior maxilla. Resection of frenulum cord with Z-plasty was performed at anterior premaxilla and upper lip sulcus. Frenulum was tightly attached to gingiva through gum and into hard palate. Width of frenulum cord was about 1 cm, and length was about 3 cm. He gained upper lip contour including cupid's bow and normal vermilion border after the surgery. This case is severe upper lip tie showing the premaxillary hypoplasia, abnormal lip motion and contour for child. Although there is mild limitation of feeding with upper lip tie child, early detection and treatment are needed to correct bony growth.

다중 문턱치를 이용한 입술 윤곽 검출 방법 (Lip Contour Detection by Multi-Threshold)

  • 김정엽
    • 정보처리학회논문지:소프트웨어 및 데이터공학
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    • 제9권12호
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    • pp.431-438
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    • 2020
  • 본 논문에서는 입술 윤곽선을 검출하기 위한 다중 문턱치 기반의 검출방법을 제안하였다. 기존의 연구 중 Spyridonos 등이 제안한 방법은 입력영상을 RGB로부터 YIQ 좌표계로 변환하여 Q 성분만을 이용하여 Q 영상을 얻는다. Q 영상으로부터 변화 점 검출을 통하여 입술 모양의 좌우 끝점을 얻어낸다. 좌우 끝점에 대한 수직 좌표의 평균값을 이용하여 Q 영상을 상하로 분리하고, 상하 영역 각각에 대하여 별도로 Q값을 대상으로 문턱치를 적용하여 후보 윤곽선을 추출한다. 추출된 후보 윤곽선에 특징치 거리를 이용하여 최적의 문턱치를 찾고, 해당하는 윤곽선을 최종 입술 윤곽선으로 결정한다. 이 때 사용되는 특징치 거리 D는 후보 윤곽선 상의 점들을 기준으로 주변 영역에 대한 차이의 절대값을 이용하여 계산한다. 기존연구의 문제점은 세 가지인데, 첫째는 입술 끝점 추출 과정에서 피부영역의 과다한 참여로 입술 끝점의 추출의 정확도가 감소하고, 따라서 후속되는 상/하 영역 분리에도 영향을 미친다. 둘째는 YIQ 칼라 좌표계를 사용하였는데, 다양한 칼라 좌표계에 대한 분석이 미비하므로 추가적인 분석이 필요하다. 세 째, 최적 윤곽선의 선택 시 적용하는 거리 값 파라미터의 계산 과정에서, 문턱치를 적용하여 구한 해당 윤곽선 주변의 데이터들에 의한 변화분을 계산하여 변화가 가장 큰 윤곽선을 입술 후보로 채택하는데, 변화분의 최대치를 기준으로 하기 때문에 검출된 입술영역이 기준보다 축소되는 문제점이 있다. 첫 번째 문제점을 해결하기 위하여 피부영역의 계산과정 참여를 줄여서 성능을 30%정도 향상시켰다. 두 번째는 YIQ 외에 HSV, CIELUV, YCrCb 등의 칼라 좌표계에 대한 성능테스트를 거쳐 기존연구 방법이 칼라좌표계에 대한 의존성이 없음을 확인하였다. 세 번째는 윤곽선 주변의 변화분 검토 시, 윤곽선 포인트 당 변화분의 평균값 대신에 변화분의 총량을 적용하여 46% 성능개선 효과를 얻었다. 이상의 내용을 모두 적용하여 제안한 통합방법은 기존연구 대비 2배의 성능향상과 안정성을 확보할 수 있었다.

에너지 최소화 기반 능동형태 모델을 이용한 입술 윤곽선 추출 (Lip Contour Extraction Using Active Shape Model Based on Energy Minimization)

  • 장경식
    • 한국정보통신학회논문지
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    • 제10권10호
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    • pp.1891-1896
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    • 2006
  • 이 논문에서는 능동형태 모델을 개선하여 입술의 형태를 효과적으로 추출하는 방법을 제안하였다. 입술의 형태변형은 능동형태 모델에 기반을 둔 통계적 형태 변형 모델을 사용하여 표현하였다. 능동형태 모델에서 각 점은 지엽적인 정보인 프로파일을 기반으로 독립적으로 이동하기 때문에 많은 오류가 발생할 수 있다. 전역적인 정보를 사용하기 위하여 이 논문에서는 능동윤곽선 모델에서 사용하는 것과 유사한 에너지 함수를 정의하고 전체 에너지가 최소화되는 위치로 점들이 이동하게 하였다. Tulip 1 데이터 베이스에 있는 입술 영상을 대상으로 실험한 결과, 제안한 방법이 기존 방법보다 실제 형태에 가깝게 입술을 추출하였다.

일측구순열변형에서 이갑개연골이식술을 이용한 상구순 함몰의 교정 (Correction of Upper Lip Depression Using Conchal Cartilage Graft in Unilateral Cleft Lip Deformity)

  • 한기환;윤상호;여현정;김준형;손대구
    • Archives of Plastic Surgery
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    • 제38권4호
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    • pp.383-390
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    • 2011
  • Purpose: To correct the upper lip depression after the correction of unilateral cleft lip, autologous grafts such as bone, dermal, fascial grafts and fat injections or alloplastic implants are used. Transplanted bones, dermis and fascia have a tendency to be absorbed and have donor morbidity. Fat injections are absorbed inconsistently and alloplastic implants have problems such as foreign body reactions, protrusions and infections. Authors corrected the upper lip depression using conchal cartilage graft in unilateral cleft lip deformity and the results was analysed with photos. Methods: 26-unilateral cleft lip and 2-microform cleft lip cases, totally 28 cases were performed. Their mean age was 21.89 years. The male and female cases were 12 and 16, respectively. Under anesthesia (general: 18 cases and local: 10 cases), cavum conchae (n=8), cymba conchae (n=16) and whole conchae (n=4) were harvested. Transversely cut the margin of the obtained cartilage, we cut out the most bent portion and put a partial-thickness incision on concave surface in cases of excessive convexity. Then, we performed the onlay graft of the conchal cartilage via scar revision site in unilateral cleft lip and via the reconstruction site of the cupid bow in microform cleft lip. The augmentation of the upper lip was evaluated with photos. Adapting the baseline connecting between the both cheilions as a horizontal standard line, we measured the highest point among the tangents between the upper lip and nose (point a), the lowest point (point c), the middle point between a and c (point b) and the vertical line from the alare (point d) to the horizontal standard line. To assess the postoperative symmetry, we compared cleft side upper lip contour index (%) A,B,C,D=(a,b,c,d)-ch ${\times}$ 100/(ch-ch) and non-cleft side upper lip contour index (%) A',B',C',D'= (a',b',c',d')-ch ${\times}$ 100 / (ch-ch).h) Results: After the surgery, no complication was found except in one case which double layers graft performed in the cleft lip deformity, the lateral portion was protruded. The upper lip contour index, the difference of A and A' were-0.83%, and thus the mild depression was persisted. Difference of B and B', C and C', D and D' were 0.83%, 1.07%, 0.90%. There were statistically significant difference, and thus the depression of upper lip were improved generally. Conclusion: Authors performed the onlay graft of the conchal cartilage in unilateral cleft lip deformity and found that the depression of the upper lip was well corrected except the uppermost part when photogrammetrically analyzed.

능동적 형태 모델과 가중치 벡터를 이용한 입술 인식 (Lip Recognition Using Active Shape Model and Shape-Based Weighted Vector)

  • 장경식
    • 지능정보연구
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    • 제8권1호
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    • pp.75-85
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    • 2002
  • 이 논문은 입술의 형태와 입술 외곽선 부근의 화소값을 이용하여 입술을 효과적으로 인식하는 방법을 제안하였다. 입술의 형태는 학습 영상을 통계적으로 분석하는 능동적 형태 모델을 기반으로 구성하였다. 이 방법은 탐색시 초기 위치의 영향을 받기 때문에 이 논문에서는 입술의 형태에 기반한 가중치 벡터를 이용하여 두 입술 사이의 경계선을 찾고 탐색의 초기 위치로 사용하였다. 다양한 입술 영상들을 대상으로 실험하여 좋은 결과를 얻었다.

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악안면 유형에 따른 측모 연조직 양상에 대한 연구 (A STUDY ON THE VARIATIONS OF THE SOFT TISSUE PROFILE CONTOUR IN RELATION TO THE SKELETAL PATTERNS)

  • 권영택;태기출;국윤아;김상철
    • 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.

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일측성 구순열비변형에서 다공성 폴리에틸렌 판을 이용한 상악골이상구증대술 (Augmentation of Pyriform Margin Using Porous High-Density Polyethylene Sheet In Unilateral Cleft Lip Nasal Deformity)

  • 한기환;김진한;최태현;김준형;손대구
    • Archives of Plastic Surgery
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    • 제35권4호
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    • pp.431-438
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    • 2008
  • Purpose: The common deformity after the correction of unilateral cleft lip nasal deformity is nasal asymmetry, and it is caused by the hypoplasia of the pyriform aperture. To correct this, many procedures have been applied, but still many problems are present. Authors performed the inlay and onlay insertion of porous high density polyethylene sheet(1 mm thickness $Medpor{(R)}$ sheet) in the hypoplastic pyriform margin of cleft side and obtained satisfactory results. Methods: 11 cases were performed and the mean follow up period was 15.1 months. Their mean age was 23.6 years. Under general anesthesia, bilateral pyriform margin was exposed. $Medpor{(R)}$ sheets in "match stick" like shaped were inlay inserted, and kidney shaped were onlay inserted fixating with two 6 mm titanium screws. After the surgery, the results was evaluated by photogrammetric analysis. On the basal view, the distance from the subalare and labiale superius' to the transverse baseline connecting the both cheilions was measured from the cleft side and the non-cleft side. Then, the postoperative symmetry was assessed by obtaining the cleft side against the non-cleft side as proportion index, defined as lateral and medial upper lip contour index. Results: There were 2 infections. The cause was because the inserted implant was too long and thus protruded to the base of nasal cavity. The lateral upper lip contour index was from 95.49 to 103.27, and medial upper lip contour index was from 90.92 to 100.49, it was statistically increased, and thus the symmetry was improved. However clinically mild depression remained at nostril floor. Conclusion: Authors performed porous high density polyethylene sheet inlay and onlay insertion for the hypoplasia of the pyriform margin in unilateral cleft lip nasal deformity. It was found that depressed pyriform margin and upper lip were corrected effectively except for the nostril floor, for which an additional soft tissue augmentation would be necessary. The inlay insertion has risk of protrusion, thus the guideline of the use of artificial prosthesis should be observed strictly.

두부방사선규격사진법에 의한 측모의 경조직과 연조직에 관한 연구 (A ROENTGENOCEPHALOMETRIC STUDY OF THE BONY STRUCTURE AND ITS PROFILE)

  • 강홍구
    • 대한치과교정학회지
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    • 제6권1호
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    • pp.17-24
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    • 1976
  • The primary objective of this study was to define the differences that exist. between different sexes on the dentoskeletal framework and the soft tissue profile around the mouth. For the purpose of this study, cephalometric radiographs were obtained from the centric occlusion with closed lip position, through the research on each 42 males and females aged from 17 to 22 years with normal occlusion and acceptable facial appearence. The results were as follows: 1. Maxillary to mandibular relationships. Among the angles formed by the long axis of the maxillary and mandibular anterior teeth, the maxillary and mandibular anterior alveolar bone, and the lower and upper lips (Fig.2), only the angle formed by the lips was more acute in males than in females. The males have a more rounded profile, and the females have a flatter profile in the lower third of the face. The differences is statistically significant for the angle formed by the lips. The fact that the lips have a difference greater than that of teeth or the alveolar bone indicates that the lip position is not entirely due to tooth and bony support. Possibly the thickness of the lips has an influence. 2. Occlusal plane. The occlusal plane was related to the anterior tooth inclination, anterior alveolar bone profile, and the lip contour, both maxillary and mandibular (Fig.3). Only the angle related to lower lip was statistically significant. The females again had the more obtuse angle, indicating a flatter profile than that of the males. 3.Skeletal planes. The angles formed by the anterior maxillary lips, teeth, and alveolar bone with the Frankfort plane and the angles of the mandibular lips, teeth, and, alveolar bone and the mandibular plane were investigated (Fig.4). Results were similar to those from maxillary to mandibular relationships. The results were statistically significant for the upper lip and the lower lip, only. 4. Esthetics. The facial line and the mandibular plane were compared with the esthetic line. These angles were different for the different sexes, but only the latter was statistically significant. This difference may be due to the profile contour of the nose.

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전완유리피판을 이용한 전하순 결손의 재건 1례 (A Case of Lower Lip Carcinoma Reconstruction with a Radial Forearm Free Flap)

  • 선동일;김민식;김준형;조광재;조승호
    • 대한기관식도과학회지
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    • 제6권2호
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    • pp.185-188
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    • 2000
  • The goals of lip reconstruction are to provide oral competence, adequate support for the lower lip, contour restoration, adequate lip sulcus, and adequate oral aperture. The composite radial forearm palmaris longus free flap is thin enough that it can be folded onto itself without a significant increase in bulk. The flap is easy to dissect, the pedicle contains long vessels of large diameter, and the skin is a good color and texture match for the perioral region. Moreover, the vascularized tendon can be used for lower lip reconstruction. This makes the flap ideally suited for total lower lip reconstruction. We experienced the case of total lower lip excision and reconstruction with the radial forearm free flap including palmaris longus tendon, so we reported that case with literature. The patient has a lower lip squamous carcinoma(T3NIM0), and performed a total lower lip excision with right modified radical neck dissection and left extended supraomohyoid neck dissection, and a reconstruction with radial forearm free flap includng palmaris longus tendon. The oral competence and masticatory function were nearly normalized and cosmetical result was very acceptable.

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Active Shape 모델과 Gaussian Mixture 모델을 이용한 입술 인식 ((Lip Recognition Using Active Shape Model and Gaussian Mixture Model))

  • 장경식;이임건
    • 한국정보과학회논문지:소프트웨어및응용
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    • 제30권5_6호
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    • pp.454-460
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    • 2003
  • 이 논문은 입술의 형태를 효과적으로 인식하는 방법을 제안하였다. 입술은 PDM(Point Distribution Model)을 기반으로 점들의 집합으로 표현하였다. 주성분 분석법을 적용하여 입술 모델을 구하고 모델에서 사용하는 형태계수의 분포를 GMM(Gaussian Mixture Model)을 이용하여 구하였다. 이 과정에서 계수를 정하기 위하여 EM(Expectation Maximization) 알고리듬을 사용하였다. 입술 경계선 모델은 입술을 구성하는 각 점과 주변 영역에서의 화소간 변화를 이용하여 구성하였으며 입술 탐색시 사용되었다. 여러 영상을 대상으로 실험한 결과 좋은 결과를 얻었다.