• Title/Summary/Keyword: Chin

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Three Rotational Variables in Osseous Genioplasty (절골 턱끝성형술에 있어 3가지 축에 따른 회전적 관계의 활용)

  • Lee, Hyun-Tae;Kim, Yong-Ha;Kim, Tae-Gon;Lee, Jun-Ho
    • Archives of Plastic Surgery
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    • v.38 no.3
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    • pp.279-286
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    • 2011
  • Purpose: Chin is located in a prominent position, and is important to balance and harmony of the face. Genioplasty is widely performed with patients' high satisfaction, yet being relatively simple procedure. Recently in analysis of dentofacial trait, three rotational variables of yaw, pith, and roll are considered with three translational variables (forward/backward, up/down, right/left). And we could correct chin deformity effectively by applying the three rotational variables with three translational variables in genioplasty. Methods: Twenty-eight patients who have chin deformity underwent osseous genioplasty. Preoperative photography, facial three dimensional computed tomography, and cephalography were taken while chin deformities were accessed. The chin deformity was classified into four categories; macrogenia, microgenia, asymmetric chin deformity, and combined chin deformity groups. According to the nature of chin deformities and the patients' desire, preoperative plans were formulated, in consideration of three rotational variables and translational variables. Through intraoral approach, anterior mandible was exposed in the subperiosteal plane between the mental foramens and beneath the mental foramens. In the anterior mandible, vertical and horizontal grid lines with 5 mm intervals were marked to confirm the spatial location of osteomized bone segment after osteotomy. Chin repositioning was done in consideration of axial rotation and planar translation. Results: Most of the patients had achieved satisfactory results with few complications. By considering the three rotational variables, it was possible to make the chin repositioning effectively. One of the patients complained about insufficient chin correction. In other case, persistent sensory impairment around chin was observed. Conclusion: In conclusion, it is worthwhile to apply preoperative analysis and operative procedures in consideration of a three rotational variables with three translational variables in genioplasty.

Application of genioplasty in malocclusion with chin deformity (이부기형을 동반한 부교교합에서의 이부골성형술의 응용)

  • Chang, Young-Il;Suhr, Cheong-Hoon;Nahm, Dong-Seok;Lee, Ha-jin
    • The korean journal of orthodontics
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    • v.26 no.3
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    • pp.241-246
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    • 1996
  • The chin is one of the factors which express human character, and appropriately protruding chin is very important to harmonious profile, the purpose of genioplasty is to reshape the chin and improve the facial esthetics which is one of the purposes of orthodontic treatment. It can be classified as augmentation genioplasty which enlarge the chin vertico-horizontally and reduction genioplasty which smallen it. The examples to apply this procedure are as follows. 1. advancement of retruded chin 2. reduction of chin prominence 3. control of chin vertical dimension 4. correction of asymmetry

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Computer-assisted horizontal translational osseous genioplasty: a simple method to correct chin deviation

  • Keyhan, Seied Omid;Azari, Abbas;Yousefi, Parisa;Cheshmi, Behzad;Fallahi, Hamid Reza;Valipour, Mohammad Amin
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.42
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    • pp.36.1-36.5
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    • 2020
  • Background: Different genioplasty techniques are applied for the adjustment of chin area deformities such as chin deviation. Results: Thirty patients with simple facial asymmetry due to chin deviation underwent computer-assisted horizontal translational osseous genioplasty. In this technique, a surgical guide was used to cut a bone strip from the side where the chin should be transferred to; then, the same bone strip was used for the filling of the gap that was formed on the opposite side. Conclusion: According to the experience gained from this study, the authors believe that computer-assisted horizontal translational osseous genioplasty is a simple and reliable technique for patients with facial asymmetry due to chin deviation.

Effect of Chin Gan Sik Pung Tang on Blood Pressure and induced Hypercholesteremic Rabbit (진간식풍탕(鎭肝熄風湯)이 가토(家兎)의 혈압(血壓) 및 혈청(血淸) Total Cholesterol에 미치는 영향(影響))

  • Kim, Hee-Joon;Yim, Jea-Hoon
    • The Journal of Internal Korean Medicine
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    • v.11 no.1
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    • pp.109-120
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    • 1990
  • In order to investigate the therapeutic effects on blood pressure and hyper cholesteremia, aqueous extract of Chin Gan Sik Pung Tang were studied. The result of the total cholesterol contents in serum and blood pressure of each group were as follows, 1. The aqueous extract of Chin Gan Sik Pung Tang inhibited increased Total cholesterol in serum of rabbits administrated with cholesterol rich diet. 2. Blood pressure manifested gradual response by the fall of 4, 3, 9.2, 19.9 percent in proportion to the administration of 10, 30, 100 mg/kg of Chin Gan Sik pung Tang, respectively 3. Administration of Chin Gan Sik Pung Tang to the rabbit pretreated with Vagotomy, Atropine and Regitine did not show any significant difference in the blood pressure, compare with that of the control group. 4. Administration of Chin Gan Sik Pung Tang to the rabbit pretreated with propranolol show significant difference in the blood pressure, compare with that of the control group. From the above results, it is suggested that Chin Gam Sik Pung Tang has the action on adrenergic ${\beta}-receptor$ and can he used therapeutic effect on the hypertension, and inhibit the increase of Total Cholesterol contents in serum.

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REMODELLING CHANGES OF THE CHIN ADVANCED BY GENIOPLASTY (이부골성형으로 전방이동된 하악이부의 골개조성 변화)

  • Han, Sei-Woo;Kim, Myung-Rae;Kim, Jae-Hwa;Bae, Jong-Go
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.27 no.1
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    • pp.48-54
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    • 2005
  • This is to evaluate the postoperative cephalometric changes of the chin advanced by the genioplasty. Thirty-eight patients who underwent advancement genioplasties at Ewha Womans University Mokdong Hospital between January of 2001 and February of 2003. They were followed up for at least 12 months with lateral cephalographs. The remodelling changes of the horizontal linear measurement between the Pogonion and Perpendicular line to FH plane were measured and analysed by Independent sample tests. The chin advancement resulted in $1.3{\pm}0.3mm$ resorption (28.2% of advancement) after 6 months, but in $1.4{\pm}0.2mm$ after 1 year. If the chin was advanced less than 3 mm, remodelling followed by $1.2{\pm}0.2mm$ reduction, but $1.3{\pm}0.3mm$ reduction followed after chin advanced over 4 mm. There were no significant differences in the amount of bone resorption by the gender, number of genial cut-steps and acompanied osteotomies.

The Effect of Muscle performance on knee flexion / extension by chin in exercise (턱 당김 운동이 무릎 굽힘폄의 근 수행력에 미치는 영향)

  • Lee, Cu-Rie;Kim, Do-Hyung;Kim, Keun-Jo
    • Journal of Korean Physical Therapy Science
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    • v.24 no.1
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    • pp.69-78
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    • 2017
  • Background: The purpose of the present study is to report the effect of muscle performance on knee flexion and extension by chin in exercise. Methods: This study was Participated in 10 healthy subjects. For conducting the chin-in exercise, subjects are lay down with supine position. Using the rounded towel, subjects was performed contraction of longus colli and longus capatis muscle by push the towel. Chin-in exercise was conducted 3 times a day, 4 times a week for 4 weeks. By using the Biodex system4, We measured absolute muscle strength, relative muscle strength, total exercise quantity and average rate of production in knee flexion and extension. The data was analyzed by the repeated-measure ANOVA for comparing before, after exercise 2 weeks, after exercise 4 weeks changes of factors. Results: After chin-in exercise, there was significant difference of before, after 2 weeks and 4weeks results in absolute muscle strength, relative muscle strength, total exercise quantity, average rate of production, agonist/antagonist ratio(p<.05). Conclusion: As a results of this study, chin-in exercise may help to improve muscle ability of knee joint activation and knee joint action performance.

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Three-dimensional computed tomography evaluation of craniofacial characteristics according to lateral deviation of chin

  • CHOI, Hyo-Won;KIM, Bola;KIM, Jae-Young;HUH, Jong-Ki;PARK, Kwang-Ho
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.41
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    • pp.57.1-57.8
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    • 2019
  • Background: The relationship between the lateral deviation of chin and the upper and middle facial third asymmetry is still controversial. The purpose of this study is to evaluate the correlation of upper and middle facial third asymmetry with lateral deviation of chin using 3-dimensional computed tomography. The study was conducted on patients who underwent orthognathic surgery from January 2016 to August 2017. A total of 40 patients were included in this retrospective study. A spiral scanner was used to obtain the 3-dimensional computed tomography scans. The landmarks were assigned on the reconstructed 3-dimensional images, and their locations were verified on the axial, midsagittal, and coronal slices. The Pearson correlation analysis was performed to evaluate the correlation between chin deviation and difference between the measurements of distances in paired craniofacial structures. Statistical analysis was performed at a significance level of 5%. Results: In mandible, the degree of chin deviation was correlated with the mandibular length and mandibular body length. Mandibular length and mandibular body length are shorter on the deviated-chin side compared to that on the non-deviated side (mandibular length, r = -0.897, p value < 0.001; mandibular body length, r = -0.318, p value = 0.045). In the upper and middle facial thirds, the degree of chin deviation was correlated with the vertical asymmetry of the glenoid fossa and zygonion. Glenoid fossa and zygonion are superior on the deviated-chin side than on the non-deviated side (glenoid fossa, r = 0.317, p value = 0.046; zygonion, r = 0.357, p value = 0.024). Conclusion: Lateral deviation of chin is correlated with upper and middle facial third asymmetry as well as lower facial third asymmetry. As a result, treatment planning in patients with chin deviation should involve a careful evaluation of the asymmetry of the upper and middle facial thirds to ensure complete patient satisfaction.

A CEPHALOMETRIC STUDY ON CORRELATION BETWEEN MANDIBULAR SYMPHYSIS AND CRANIOFACIAL SKELETON (하악이부와 두개안면골격의 상관성에 관한 측모두부방사선 계측학적 연구)

  • Noh, Sang-Ho;Lee, Ki-Soo;Park, Yong-Kuk
    • The korean journal of orthodontics
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    • v.27 no.1
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    • pp.119-127
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    • 1997
  • The configuration of mandibular symphysis is likely to be dependent upon the genetic predeterminants and/or compensatory adjustments onto functional demands. The interrelation of morphological distinctives of symphysis in conjunction to the craniofacial skeleton had been scarcely anecdotal, therefore, the objective was to determine the correlation of morphological modifications between the mandibular symphysis and craniofacial complex. Lateral cephalometric headfilms of 212 subjects were employed for the conventional measurements. The proportion of chin height against chin depth length was referred as chin ratio, then, Low Symphysis (IS) and High Symphysis (HS) groups were turned out by means of the chin ratio. These samples yielded 35 in LS and 35 in HS groups. The data per capita were statistically analyzed and the following results were drawn ; 1. Overall characteristics of the craniofacial skeleton in HS group manifested hyperdivergence and LS group showed hypodivergence. 2. Gonial angle increased as chin ratio increased and was highly correlated to the chin ratio. 3. The chin ratio presented high correlation to the vertical face height, especially in terms of the chin height to anterior face height and the chin depth to posterior face height. 4. The morphological configuration of chin was hardly correlated with hyoid bone position.

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Dual Plane Augmentation Genioplasty Using Gore-Tex Chin Implants

  • Kim, Byung Jun;Lim, Jong Woo;Park, Ji Hoon;Lee, Yoon Ho
    • Archives of Craniofacial Surgery
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    • v.15 no.2
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    • pp.82-88
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    • 2014
  • Background: The chin shape and position is important in determining the general shape of the face, and augmentation genioplasty is performed alone or in combination with other aesthetic procedures. However, augmentation genioplasty using osteotomy is an invasive and complex procedure with the potential to damage mentalis muscle and mental nerve, to affect chin growth, and prolonged recovery. Our aim was to present our experience with a modified augmentation genioplasty procedure for hypoplastic chins using a Gore-Tex implant. Methods: Two vertical slit incisions were made at the canine level to create a supra-periosteal pocket between the incisions, preserving the periosteum and mentalis muscle. Minimal sub-periosteal dissection was performed lateral to the incisions along the mandibular border. The both wings of implant were inserted under the periosteum to achieve a stable dual plane implantation. Results: In total, 47 patients underwent dual plane chin augmentation using a Gore- Tex implant between January 2008 and May 2013. The mean age at operation was 25.77 years (range, 15-55 years). There were 3 cases of infection; one patient was treated with antibiotics, the others underwent implant removal. Additionally, two patients complained of postoperative parasthesia that spontaneously improved without any additional treatment. Most patients were satisfied with the postoperative outcomes, and no chin growth problems were observed among the younger patients. Conclusion: Dual plane Gore-Tex chin augmentation is a minimally-invasive operation that is simple and safe. All implants yielded satisfactory results with no significant complications such as mental nerve injury, lower lip incompetence, or chin growth limitation.