The Japanese Journal of Jaw Deformities
Online ISSN : 1884-5045
Print ISSN : 0916-7048
ISSN-L : 0916-7048
Volume 2, Issue 2
Displaying 1-13 of 13 articles from this issue
  • MAYUMI TOCHIKURA, HARUYO KATADA, KENJI SUEISHI, HIDEHARU YAMAGUCHI, MA ...
    1992 Volume 2 Issue 2 Pages 85-96
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    The purpose of this study is to investigate the long-term stability of jaw relationship and occlusion after the surgical orthodontic treatment of mandibular prognathisms and skeletal open bites. Subjects consist on fourteen adult patients (3 males, 11 females) that ten patients were done the sagittal splitting ramus osteotomy and four patients were done the two jaw surgery (Le Fort I ostetoomy plus saggital splitting osteotomy). They were put under observation during over five years after treatment until the latest record (T4-T6: 7 years in an average). The results were as follows:
    1) At the sagittal splitting ramus osteotomy group (Table 3), Pogonion was retruded 8.7mm in an average due to the operation, and further was repositioned 0.4mm backward during T4-T6. There was one case who was recognized the forward relapse over 1.5mm. After the vertical distance between Nasion and Menton was decreased 2.6mm during active treatment (T1-T4), it was increased 1.8mm during T4-T6, and there was one case who became a slight open bite with mandibular clockwise rotation.
    2) At the two jaw surgery group (Table 4), Pogonion was retruded 11.5mm due to the operation, and was repositioned 0.9mm forward during T4-T6. Point A was advanced 4.3mm due to the operation, and was repositioned 0.9mm backward like relapse during T4-T6.
    3) Lower incisors were tipped labially for decompensation during T1-T4, and were inclinedlingually during T4-T6. Upper incisors were tipped lingually during T1-T4, and still more were inclined lingually for many cases during T4-T6.
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  • HIROAKI ISHII
    1992 Volume 2 Issue 2 Pages 97-116
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    Forty-One cases of mandibular protrusion undergoing sagittal-split osteotomy of the ascending ramus and screw fixation by the repositioning technique for external bone fragments of Matsuura et al. were studied in regard to the periodical pcstoperative changes in lateral and frontal cephalometric roentgenograms. Concurrently, factors involved in relapse were analyzed. The following results were obtained: 1. Cephalometric variables measured postoperatively were contrasted with the corresponding values obtained 2 months, 6 months and 1 year postoperatively. Significant differences were not noted in any of the variables studied.
    2. Significant differences were noted between the preoperative and postoperative form of the gonial angle. This study demonstrated postoperative improvement in the form of the gonial angle.
    3. The degree of posterior displacement of the mandible did not bear a significant relationship with relapse.
    4. Bilateral differences in posterior displacement was not significantly related to relapse.
    5. Preoperative anterior tooth overlap was not significantly related to relapse.
    6. Analysis of postoperative changes between 1 year and 3 years, studied in 10 cases, did not reveal any significant differences.
    7. External bone fragments moved medially postoperatively, resulting in bilateral asymmetry. Although extraoral movement was evident after 1 year compared with just after surgery, bilateral asymmetry persisted.
    8. Factors involved in relapse underwent multiple regression and principal component analysis, but the relation between preoperative skeletal characteristics and relapse was minimal.
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  • YOSHINOBU KUBO, MASAKIYO KOBUCHI, HIROSHI NAKAMURA, RIKIYA SHIRASU, JU ...
    1992 Volume 2 Issue 2 Pages 117-124
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    The purpose of orthognathic surgery is to improve the patient's face and occlusion. Therefore, under having the informed concent of the patient, it is very important to plan and treat for the dento-facial deformity patient. As the situation now stands, our new technique of combining the dento-maxillo facial m odel method and the face-bow transfer method produce satisfactory result.
    The characteristics or advantages of this technique are as follow: 1. Before surgery, we can show the patient their post-surgical predictable face three-dimensionally.
    2. This method is applicable for all patient planned two jaw surgery.
    3. This method allows the maxillary segment to be set more simply and easily than previous methods.
    4. Especially this method is very useful for the patient that prediction of post-surgical face is difficult.
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  • Sumio SAKODA, HIROKAZU FUKUHARA, RYOSUKE SHIBA
    1992 Volume 2 Issue 2 Pages 125-131
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    Orthognathic surgeries have been performed on 76 patients from 1980 to 1991 at the Department of Oral and Maxillofacial Surgery, Miyazaki Medical College Hospital. The age of patients ranged from 16 to 40 years with an average of 21.0 years. The ratio of male to female was 1: 3. Most of them were the patients with mandibular prognathism, and developmental abnormalities of the mandible including open bites and facial asymmetries occupied 85.5 % of all the patients performed by the orthognatic surgeries. Sagittal splitting osteotomy (Obwegeser-Dal Pont's method) has been carried out on 89.4 % of the patients. Two jaw surgery (upper and lower jaws) were made on 4 patients.
    Autopreserved blood reinfusion, induced hypotension and osteosynthesis between splitted bone segments with miniplate have been used since 1986, 1987 and 1988, respectively.
    Induced hypotension was considered to be useful to reduce operation time and blood loss. It seems that fixation of the devided bone segments with miniplates has a greater advantage for reduction of postoperative relapse of the mandible than ligatures with wire.
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  • SHINJI KAMAKURA, HIROSHI KAWAMURA, HIROSHI NAGASAKA, SHUICHI SATO, KAT ...
    1992 Volume 2 Issue 2 Pages 132-138
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    Single-tooth dento-osseous osteotomy is known to be one of the orthognathic surgery. Advantages of this method are speed of treatment, the ability to move segments in any direction and perform under local anesthesia, and elimination of long-term retention appliance, and improved stability. So it can be considered to be a effective method for malposition of individual tooth.
    Four cases of ankylosed anterior maxillary tooth have been treated with single stage surgical technic for immediate reposiotioning of single-tooth dento-osseous osteotomy. In these cases, conventional orthodontic treatment did not work at all.
    Incision was made at the labial mucosa slightly away from buccogingival sulcus and reflected as a full-thickness mucoperiosteal flap. Then we ascertained macroscopically the apices of ankylosed tooth and interdental area. Buccal vertical interdental osteotomies were made, horizontal osteotomies extended at least about 5mm above the apices of the ankylosed tooth. The single-tooth dento-osseous segment were then fully mobilized and repositioned desirable posotion. Fixation was accomplished with activated wire tooth bracket.
    Occlusal deformities by ankylosed tooth have been successfully corrected by single-tooth dento-osseous osteotomy. Healing of the soft tissue and bony incisions was uncomplicated. Postoperative radiographs show consolidation of the osteomised segments. No relapse, tooth mobility and root resorption was existed. Only one case, we recognized increase of cervical resorption which had been existed before operation.
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  • HIROSHI KAWAMURA, JUNJI SUGAWARA, HIROSHI NAGASAKA, YUICHIRO OOMORI, S ...
    1992 Volume 2 Issue 2 Pages 139-149
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    In the surgical correction of mandibular deformities by mandibular retrusion, there is little difference in usefullness between sagittal split and vertical ramus osteotomies.
    However, vertical ramus osteotomy causes less rotational displcement of the proximal segment in asymmetric retrusion. Sagittal split ramus osteotomy is easier in the intraoral rigid internal fixation.
    Then unilateral sagittal split ramus osteotomy combined with contralateral intraoral vertical ramus osteotomy was done with these advantages for the surgical correction of mandibular asymmetry.
    The intermaxillary fixation between 1 and 2 weeks was sufficient in these osteotomies and good postoperative stability was naturally observed.
    The many preoperative symptoms and signs of temporomandibular joints were also improved after the correction of mandibular asymmetry by this technique. Never new symptoms of temporomandibular joints were observed following the treatment by this technique.
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  • HIROFUMI MURASE, MAKI TANAKA, KAZUSHI WATANABE, MASAKI KUBOTA, KAZUYUK ...
    1992 Volume 2 Issue 2 Pages 150-157
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
    Mandibular prognathism with undergrowth development of the upper jaw was was surgically corrected by Le Fort I osteotomy with median palatine suture splitting and by sagittal splitting (Obwegeser-Dal Pont method) osteotomy of the mandibuler ramus. The result was satisfactory and facial profile recovered well.
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  • 1992 Volume 2 Issue 2 Pages 159-161
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
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  • 1992 Volume 2 Issue 2 Pages 162-173
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
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  • 1992 Volume 2 Issue 2 Pages 173-176
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
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  • 1992 Volume 2 Issue 2 Pages 176-197
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
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  • 1992 Volume 2 Issue 2 Pages 197-213
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
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  • 1992 Volume 2 Issue 2 Pages 214-230
    Published: October 30, 1992
    Released on J-STAGE: February 09, 2011
    JOURNAL FREE ACCESS
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