• Journal of Periodontal and Implant Science
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• v.27 no.1
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• pp.91-109
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• 1997

본 연구에서는 악골에 식립된 순수한 타이타늄 임프란트와 타이타늄 플라즈마 처리된 타이타 늄 임프란트 및 수산화인회석으로 피막처리된 타이타늄 임프란트의 주위 골조직을 광학현미경 과 주사전자현미경을 이용하여 비교 관찾히였다. 3 마리의 beagle dog 에서 상하악 소구치를 편측으로 발거한 후 12 주의 치유기를 거쳐 임프란트 를 식립하였으며, 임프란트 식립 후 4주, 8주 및 12주에 실험동물을 각각 희생시켜서 조직 표본을 제작하였다. 임프란트 주위의 골조직에서 염증이나 이물반응은 관찰되지 않았으며, 정상적인 악골에서와 유사한 골조직 소견이 관찰되었다 상악골 및 하악골에 식립된 모든 임프란트의 4주 표본에서, 골과 임프란트 변의 직접적인 접촉이 관찰되었다. 동일한 치유기에서는, 상악골에 식립된 임프란트의 면에 비하여 하악골에 식립된 동종의 임프란트의 변에서 더 많은 양의 골접촉이 관찰되었으며, 순수한 타이타늄 임프란트의 면에 비하여 피막처리된 타이따늄 임프란트의 변에서 더 많은 양의 골접촉이 관찰되었다.

• Korean Journal of Cleft Lip And Palate
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• v.9 no.2
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• pp.55-62
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• 2006

1980년 일리자로프가 하지에서의 골 신장술을 발표한 이래 수많은 외과 의사들이 임상연구와 발표를 거듭해 현재의 골 신장술을 이루었다. 악골에서 골 신장술의 적용은 1992년 8명의 악골 기형 환아에게 하악지 신장술을 적용한 맥카시의 발표를 기점으로 시작되었다. 골 신장술의 장점은 부족한 골조직과 함께 주변 연조직을 신장시키는 것으로 복합적 조직 결손을 보이는 선천성 악골 기형 환자들에게 특히 유리하게 적용시킬 수 있다. 반안모 왜소증은 안면 반측의 상/하악골 및 악관절, 연조직의 저성장 및 결손을 보이는 비교적 흔한 악골 기형이다. 하악지 신장술의 활발한 연구로 이를 이용한 악관절 증상과 안면 비대칭의 해소가 일차적 치료기법으로 선택되고 있다. 연구자들은 악관절 증상과 안면 비대칭을 주소로 내원한 성인 반안모 왜소증 환자에게 상악 및 하악의 동시 골 신장술을 적용하여 만족할 만한 결과를 얻었기에 이를 발표한다. 상악골의 Le Fort 제1형 골 절단술과 이환측의 하악지 시상분할 골절단술 후에 Molina distractor를 하악지에 적용하고 악간 고정을 통해 동시 신장을 꾀하였다. 수술 기법 및 평가 기법에 대하여 논의하였다.

• The korean journal of orthodontics
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• v.28 no.4 s.69
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• pp.533-546
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• 1998

A Skeletal Class III malocclusion may be the result of a large mandible, a small maxilla or combination of the two. Protraction devices for the maxilla are used to promote the growth of a deficient maxilla by applying extraoral force to actively growing patients. This study has been performed to determine whether there are significant differences in skeletal and dental changes between FH/Pal 1 and FH/Pal 2 group, SNA 1 and SNA 2 group, SNB 1 and SNB 2 group, and LFH 1 and LFH 2 group after RME and facial mask therapy. The results of this study can be summarized and concluded as follows ; 1. In all patients after maxillary protraction, the maxilla and maxillary dentitions moved forward, and the mandible rotated backward and downward. In most of them, palatal plane is tends to have an upward inclination. 2. The FH/Pal group 1, having an upward inclination of the palatal plane as a result of Facial mast showed statistically significant maxillary forward movement compared to the FH/Pal group 2. 3. The SNA group 1 showed significantly less mandibular backward movement and there was a tendency for the palatal plane to upward inclination compared to SNA group 2. 4. The SNB group 1 showed significantly less maxillary forward movement, but the vertical dimension, especially the lower facial height increased by mandibular downward rotation compared to SNB group 2. 5. LFH group 1, which had large saddle angle and posterior positioned mandible in the pre-treatment stage, showed maxillary protraction effect without significant increase in lower facial height compared to LFH group 2.

• The korean journal of orthodontics
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• v.29 no.1 s.72
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• pp.23-35
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• 1999

Lateral cephalograms or 251 males md 286 females were taken and pubertal growth pattern or cranial base, maxillary and mandible of 7 to 17 years old Korean children was evaluated. 10 landmarks and 16 analytical measurements were evaluated. Analytical measurement and annual difference for each age group was calculated and tested for statistical significance. Analytical measurements were classified into three groups which were cranial base, maxillary and mandibular measurements and also classified into make and female measurements. Following results were achieved. 1. The circumpuberal growth spurt was earlier in Korean females than in males. 2. Cranial base, maxilla and mandible showed circumpuberal growth. The cranial base showed a relatively smaller amount of growth than the facial complex. 3. Middle and posterior cranial base length showed a floater increase than anterior cranial base length and circumpuberal growth spurt was also more definite. 4. the forward and downward growth or maxilla results from maxillary growht itself and transposition or the maxilla due to circumsutural growth aroud the maxilla. Ar-ANS and Ar-Pr which represent maxillary position relative to the cranial base showed more growth than ANS-PNS which represents maxillary bone growth. 5. mandible showed more vertical growth than horizontal growth but without significance. 6. Alveolar gwoth of maxilla and mandible show maximum growth rate of the time of permanent teeth eruption following loss of deciduous teeth . After this period alveolar growth shows a decreasing tendency.

• 대한치주과학회:학술대회논문집
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• 1994.12a
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• pp.43-43
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• 1994

• The Journal of the Korean dental association
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• v.52 no.10
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• pp.623-632
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• 2014

The facial asymmetries include maxillary, mandibular, and chin asymmetries, although the most common deformity is primarily in the mandible. Common causes of this type of asymmetry can include asymmetric growth of the condyle or the mandible. In these patients, the location of the Me would be deviated to the shorter side because of the asymmetric growth of the mandible, and, commonly, the maxillary occlusal plane would be tilted toward the deviated side because the maxilla likely grows asymmetrically according to the pattern of asymmetric mandibular growth. Three-dimensional CT images are ideal for evaluating the size and location of anatomic structures, and such reconstructed images allow the use of software that can show anatomic structures from numerous angles, allowing actual measurements of distances and angles without problems of magnification, distortion, or superimposition caused by 2-dimensional imaging. In the present study using 3D-CT imaging, the 8 parameters, including measurements of the upper midline deviation, maxillary canting in the canine and first molar regions, width of the upper arch, width of the mandible at the Go, vertical length of the ramus, inclination of the ramus, and deviation of the Me were easily measured. The dentition should be orthodontically decompensated and dental midline should ensure incisor midlines positioned in the midline of each jaw before surgical correction. Surgical correction could be considered such as canting or yawing correction in the frontal or horizontal aspect, respectively.

• The korean journal of orthodontics
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• v.28 no.2 s.67
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• pp.189-201
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• 1998

The purpose of this study was to evaluate the characteristics of craniofacial skeleton on orthognathic surgical cases with skeletal Class III malocclusion. For this study, 74 students at the dental college of Chosun University volunteered as a normal occlusion group. They had well-balanced faces and good occlusions with acceptable Class I molar relationship. They had not received orthodontic treatment and had no signs or symptoms of temporomandibular joint dysfunction. 45 malocclusion patients enrolled for orthognathic surgical treatment with skeletal Class III malocclusion at the Department of Orthodontics, College of Dentistry, Chosun University. On the basis of this study. the results of this study were as follows: 1. Skeletal Class III malocclusion was largely due to the overgrowth of mandible in man and the undergrowth of maxilla in woman. 2. The mandible was antero-inferiorly overgrown by large MP-HP angle and large genial angle in orthognathic surgical cases with skeletal Class III malocclusion. And also, upper incisors were severely labioversioned, but on the other hand lower incisors were linguoversioned. 3. In female, lower-third facial height was characteristically shortened in comparison with middle-third facial height and also, lower facial throat angle was small in male.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.13 no.1
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• pp.44-52
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• 1991

Internal measurement technique has been commonly and classically used to guide down-fractured maxilla by Le Fort I osteotomy into its new position during intraoperative procedure for correlating preoperative model works with surgery. However, It has been challenged now by several authors due to some problems as its inaccuracy in three-dimensional changes at surgery, difficulty to measure during surgery and impossibility of rechecking at the end of surgery etc. The purpose of this study was to evaluate the accuracy of maxillary movement by external measuring technique and to determine its accuracy between the prediction tracing and a new maxillary position. The results indicate that the external measuring technique was predictable in the vertical, horizontal and transverse change of the maxilla as its prediction, however, it has a tendency to shift the maxilla more anterior and inferior in overall direction than prediction. Post-operative canting difference were mimic, however Ehange of the maxillary dental midline was large and had a right-shifting tendency.1 The precise methods to keep maxillary dental midline as same as prediction and the avoidance of uneven force applied to the mandible for autorotation should be necessary during surgery in use of external measurement technique.

• The korean journal of orthodontics
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• v.33 no.3 s.98
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• pp.157-167
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• 2003

The purpose of this study was to find whether there is a correlation between tooth size and jaw size. Dental stone models and cephalometric radiographic films of 87 untreated individuals were evaluated. Repeated measurements of the maximum mesiodistal width of the teeth were taken by means of a digital vernier caliper. Linear measurements of jaw size were assessed by means of a digitizer and Visual C++ program. All measurements were taken separately according to the subject's gender. To determine the relationship between jaw and tooth size, the Pearson correlation was used. The results were as follows: 1. Male and female subjects showed a statistical difference in regard to tooth size and jaw size 2. In contrast to the results of the male subjects, there were no statistically significant correlations between maxillary size and maxillary teeth size in female subjects 3. In male subjects, the two maxillary sizes of PTM vert-ANS vert (FH plane) and PTM vert-A yen (palatal plane) were significantly correlated with themaxillary teeth size. Especially, the size of the upper central incisor showed significant correlation with all maxillary sizes. 4. In both male and female subjects, mandibular size B vert- Point J vert (mandibular plane) showed significant correlation with mandibular teeth size. As gleaned kom the results of this study, the relationship between jaw size and tooth size was fair or little in natural occurring good occlusion.

• Journal of the korean academy of Pediatric Dentistry
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• v.28 no.3
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• pp.496-503
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• 2001

Maxilla overgrowth who diagnosis with skeletal Class II division 1 have transverse and also sagittal problem. If maxillary growth vector is direction to anterior inferior, mandible is rotation to clockwise pattern and it disturbance it's anterior growth. At this time, treatment goal is restrict of maxillary growth to accomplish ideal intermaxillary relation and one of treatment choice is the application of extraoral force. This report is 3 case treated by activator and headgear combination therapy, who diagnosed with skeletal Class II div. 1 malocclusion.