Japanese Journal of Oral and Maxillofacial Surgery
Online ISSN : 2186-1579
Print ISSN : 0021-5163
ISSN-L : 0021-5163
Volume 30, Issue 11
Displaying 1-20 of 20 articles from this issue
  • The Yatabe-Guilford personality inventory
    Naganobu YAMADA
    1984 Volume 30 Issue 11 Pages 1647-1659
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Although surgical correction of prognathism improves appearance of the patients in most cases, it sometimes happens that they are not necessarily satisfied with the operation. We thought that the most important reason for this might be personality tendencies. Therefore, we administered a personality inventory (the Yatabe-Guilford personality inventory) and a questionnaire before the operation and one year after the operation to 60 patients who came to our clinic.
    Their personality tendencies were first classified into 5 types in terms of the so-called Y-G personality types. Second, we analyzed the relation between the personality type and the response to each item of the questionnaire. Moreover, we analyzed the changes in patients' personality types as well as the scale values of the Y-G personality inventory before and after the operation.
    The results obtained are summarized as follows:
    1. Relation between the Y-G type and the response to the questionnaire administered after the operation
    (1) According to the multivariate analysis of contingency table (MAC), the Y-G personality type was the D-type (the director type), the B-type (the black-list type), the C-type (the calm type), the A-type (the average type), and the E-type (the eccentric type), in order of degree of satisfaction with the operation.
    (2) Moreover, the five Y-G types were divided globally into two groups, one including the B and D types, and the other including the A and E types. The former consists of patients who were satisfied very much with the operation and the latter consists of those who were not necessarily satisfied with the operation.
    2. Change in the Y-G personality inventory before and after the operation
    (1) Decreases in depression and inferiority feelings and increases in thinking extroversion and ascendance were both statistically significant.
    (2) Personality types of 33. 3% of the patients changed to emotionally stabler or more extraversive ones, while only 6. 7% of the patients changed to more introversive ones.
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  • Takanori HATTOI, Tetsuya NARUKAWA, Yoshio AKIYAMA, Toshihiko KAWAI, Ta ...
    1984 Volume 30 Issue 11 Pages 1660-1663
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Cefbuperazone distribution in oral tissue and inflamed mouth floor of mice was examined by agar well method.
    After abdominal administration of Cefbuperazone 200 μg/g in mice, tissue concentration of mouth floor and submandibular gland reached a peak in 5 minutes, that of mandibular bone, tongue, masseter, and serum in 10 minutes, and that of femur in 30 minutes. The tissues in order of concentration were the serum, mouth floor, femur, submandibular gland, tongue, masseter and mandibular bone.
    After abdominal administration of Cefbuperazone 200 μg/g in mice of which mouth floor had been inflamed, the concentration of inflamed mouth floor reached a peak in 10 minutes. As compared with normal mouth floor, Cefbuperazone was highly distributed in inflamed mouth floors.
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  • Shigeyuki FUJITA, Tadahiko IIZUKA, Yasuhiro HIROOKA, Lianq-Horng Chen, ...
    1984 Volume 30 Issue 11 Pages 1664-1671
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Moire topography is a biostereometric technique that provides 3-dimensional analysis of the human body.
    It is a low cost and relatively simple technique which produces immediate contour maps superimposed on the object image on the film.
    These data have been analyzed by hand until today.
    In this study, 3-dimensional computer analysis was made in 5 cases with jaw deformities.
    The transection and longitudinal sections of the human face were also obtained by using the computer data analysis.
    This method is well applicable to the comparison of pre-and post-operative shapes of jaw deformity.
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  • Yasushi FUJITA, Kunihiko SHINOKI, Hideki MOMONO, Kazunori KIMURA, Tats ...
    1984 Volume 30 Issue 11 Pages 1672-1677
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Using a newly manufactured low-output CO2laser, the adhesion of the incised wounds (2 cm in length), created on the backs of rats, and the anastomosis of rat common carotid arteries (0.8-1.2 mm diameter) were attempted and compared with those performed by conventional suture techniques.
    The results were as follows:
    1) The antitension of the incised wounds were higher in the groups adhered by irradiation with lasers than in the groups sutured by conventional techniques.
    2) We found hair growth on the laser irradiated area.
    3) Between the two groups there was no difference on the way the wounds healed.
    4) The success of anastomosis of rat common carotid arteries by laser irradiation was 91.8%, but the success of those by conventional suture techniques was 77.1%.
    5) If the anastomosis of small arteries by laser techniques was performed with too high power lasers, blood-vessel dilatation or aneurysm would be observed at the anastomosis area.
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  • Hiroshi SAITO, Toshirou TAGAWA, Masanori HASHIMOTO, Masanori ONISHI, M ...
    1984 Volume 30 Issue 11 Pages 1678-1685
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Carcinomas arising in the jaws are rare. Three cases of carcinoma arising in the mandible are reported.
    Case No.1-A 58-year-old man was referred with a dry socket at 6 which had been extracted 2 weeks previously. Radiographic examination showed a radiolucent lesion, about 3 cm in diameter, with irregular margin at periapical area of 7.
    Case No.2-A 81-year-old man was referred with a continuous ache and swelling at his left cheek. Radiographic examination showed an irregular destructive lesion in the left ramus of the mandible including an unerupted third molar.
    Case No.3-A 74-year-old man as referred with trismus and unpleasant feeling at his left cheek. Radiographic examination showed faint and irregular destruction in the left ramus of the mandible.
    Pathological examination revealed squamous cell carcinoma in each case. The purpose of this report is to present three additional cases of squamous cell carcinoma arising in the mandible.
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  • Toshihiko FUJIWARA, Kunio IKEMURA
    1984 Volume 30 Issue 11 Pages 1686-1689
    Published: November 20, 1984
    Released on J-STAGE: September 13, 2011
    JOURNAL FREE ACCESS
    A case of eosinophilic granuloma of the soft tissue (Kimura's disease) in the cheek of a 43-year-old man is described. A tumor of the cheek was resected and histologic examination revealed hyperplastic lymphfollicular structure and marked infiltration of eosinophils. In the blood examination, eosinophilia was present and serum level for IgE was more than 4, 000 IU/ml. Postoperative course was good and no recurrence was seen during the follow-up period of 17 months. The patient had tumors also in the right elbow joint region and both inguinal region, which were speculated as eosinophilic granuloma.
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  • Tadamitsu KAMEYAMA, Masazumi TAKENAKA, Teruo HIEDA, Masato FUTAMI, Cho ...
    1984 Volume 30 Issue 11 Pages 1690-1695
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Oral Malignant lymphomas are rare. Prognosis of extra-nodal malignant lymphoma is good, but that of oral malignant lymphoma is poor.
    Three cases of oral malignant lymphoma experienced in our oral surgery are reported. Case I (Maxilla, Stage IE) was treated by surgical excision and chemotherapy. Case II (Mandible, Stage IIE) and case III (Upper Gingiva Stage IE) were treated by radiation therapy. Case I and case II had no recurrence for more than 11 years, and case III for more than 6 years.
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  • Hiroshi FUKUDA, Shigeaki TADOKORO, Sakiko SOMEYA, Kazuo NEMOTO
    1984 Volume 30 Issue 11 Pages 1696-1702
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Malunion of fractures of the middle third of the face results in facial disfigurement and functional disturbance of the masticatory system. In such a case, it is necessary to correct these conditions simultaneously.
    In this report, the authors present a woman who suffered “dish face” deformity and Angle Class III malocclusion caused by the malunited maxillary fractures, and the surgical exprience of modified Le Fort III (malar maxillary advancement) + Le Fort I osteotomy.
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  • Nobukatsu KASAI, Akio INOUE, Masaoki UCHIDA
    1984 Volume 30 Issue 11 Pages 1703-1707
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    In this study, 643 patients with thyroid disease were analized and there were 22 cases with aphthous stomatitis (3. 5%) found. 16 aphthous stomatitis (6. 8%) were found in 234 chronic thyroiditis and 3 aphthous stomatitis were found in 258 thyroid tumor cases (thyroid cancer 150 cases and 108 benign tumor cases). Others were 87 simple goiter with 3 aphthous stomatitis, 38 hyperthyroidism, 11 hypothyroidism and 6 others.
    Aphthous stomatitis with chronic thyroiditis was found more frequently than aphthous stomatitis with thyroid tumor (p<0. 005). Aphthous stomatitis are alleged to occure frequently in patients with chronic thyroiditis. Thyroid sicca is very effective for aphthous stomatitis with chronic thyroiditis (the effective rate is 87. 5%).
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  • Toshichika TAKAHASHI, Hironobu TAMURA, Naoya IOKU
    1984 Volume 30 Issue 11 Pages 1708-1715
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Dislocation of temporomandibular joint is usually apparent from deformation of facial configuration, jaw closing disturbance, malocclusion, etc. However, there are some cases in which the failure of reduction in the early stage for some reason or other results in obsolete dislocation which is difficult to repair.
    We treated 2 cases of obsolete dislocation of temporomandibular joint, with the following results.
    Case 1 is a 74-year-old female patient who, about 40 days after her visiting the departments of surgery and dentistry for bilateral dislocation of temporomandibular joint, came to our department with a complaint of masticatory disturbance. Closed reduction was performed under general anesthesia, and the patient has since been in satisfactory condition.
    Case 2 is a 71-year-old male patient who, about 4 months after visiting the departments of dentistry and orthopedics, came to our department with a complaint of jaw closing disturbance. Closed reduction was performed without improvement and, therefore, open reduction was performed under general anesthesia. Because of the operation and the subsequent mouth opening exercise and close follow-up, the patient has had a favorable course to this day.
    We also made a clinicostatistical analysis of the cases of temporomandibular joint dislocation reported during the decade from 1972 to 1981 in Japan.
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  • Ichiro MASUI, Toshiaki KAWASAKI, Hiromichi NAGAO, Takeshi HONDA, Katsu ...
    1984 Volume 30 Issue 11 Pages 1716-1730
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Cleidocranial dysostosis is an uncommon condition characterized by ossification disturbance of the clavicles and skull, oral and dental anomalies, together with hereditary characteristics. It is described in foreign countries where more than 600 cases have been presented, out of which a number of familial occurrences have been reported. However, relatively few familial cases have been reported in Japan.
    We report here an experience with cleidocranial dysostosis observed in mother and child. A 39-year-old woman visited this hospital complaining of an oppressive pain on the gingiva at the region of|23. An orthopantomogram showed 16 impacted teeth including 5 supernumerary teeth in the jaws. Further examinations revealed incomplete ossification of the cranial sutures, hypoplasia of facial bones, mandibular prognathism, high palatal vault, partial defect of the clavicles, and other findings. From the family history it was found that the second of two sons, a 10-year-old boy, had a delayed dentition of the permanent teeth. Radiographic and physical examinations of him disclosed open fontanel and incomplete ossification of the cranial sutures, delayed eruption of the permanent teeth, total defect of the right clavicle and partial defect of the left one, hypoplastic development of the pelvis, and some other findings.
    Additionally, discussions on clinical features with a reference to familial occurrences of this condition based on Japanese literature were made and the results are as follows:
    1) Therewas much variety of such characteristic findings as hypoplasia of the skull and clavicles and oral anomalies between the cases which suggested that many incomplete forms of this condition exist.
    2) 153 cases of cleidocranial dysostosis were reported in Japan, 50 (32. 7%) of which were cases observed in a parent and child were in 25 families. From considerations of existence of incomplete forms and occurrences in siblings, however, further investigations of the patient's family might disclose more familial occurrences.
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  • Tamotsu MIMURA, Naoki OHEDA, Tsutomu TANAKA, Shinichiroh YOSHIMINE, Ma ...
    1984 Volume 30 Issue 11 Pages 1731-1735
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Patients at the Second Department of Oral and maxillofacial Surgery Kagoshima University Dental School Hospital during the first three years (April, 1981-April, 1984) since its the establishment were analyzed statistically.
    1. There were 613 new patients in the first year, 743 in the second year and 667 in the third year. These figures accounted for about 20% of all patients at the hospital.
    2. Inpatients increased each year, i.e., 99, 131, and 154.
    3. Cleft lip and/ or palate cases markedly increased each year, i. e., 34, 36 and 68. The number of plastic operations for these patients amounted to 37, 36 and 67.
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  • Seiichiro KIHARA, Takeshi KATSUKI, Masaaki GOTO, Masaaki KOGA, Wataru ...
    1984 Volume 30 Issue 11 Pages 1736-1744
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Thanks to the refinement of the techniques of endodontic therapy and to the development of dental instruments, some teeth have frequently been saved without oral surgical procedures. There are cases, however, where extraction is the only solution: those teeth which have more than one third of the root involved in cystic cavity and are mobile, and those whose crown is extensively destroyed.
    Both apicoectomy and implantation of bioceram tapered pins were applied, for preservation, to teeth whose roots were involved in large radicular cysts which were not healed with endodontic therapy. The cavities were then filled with cancellous bone from iliac crest in four cases.
    The results are summerized below.
    1) The teeth involved in the cysts have been preserved without mobility by a combination of apicoectomy and endodontic endosseous implantation.
    2) Primary healing occured in six cases after removal of cyst walls and implantation of bioceram tapered pins without bone grafting. Moreover, the younger the patient, the more rapidly ossification of the cystic lumen proceeds. This wasdemonstrated by radiography. After only a month, one can observe that cysts were beginning to be filled with bone.
    3) In four cases cystic cavities in the upper jaw were transplanted autologous cancellous bone taken from the iliac crest. Primary healing also occured. After as short a period as three months, complete filling of the cystic cavity with newly formed bone trabeculae was demonstrable radiographycally.
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  • Hiroharu KOBAYASHI, Katsumi NISHIJIMA, Toshichika TAKAHASHI, Hideki SU ...
    1984 Volume 30 Issue 11 Pages 1745-1750
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Adenomatoid odontogenic tumor is characterized histologically by abundant epithelial parenchymal cells, containing ductlike structures surrounded by cylindric cells.
    In this article we report on the experience of a case of this tumor. The patient is a female, 12 years old, from the end of February 1982 she noticed a swelling of the gingiva at 2-4 portion but left it alone at first. As the swelling did not disappear, she consulted a certain dentist, who introduced her to our clinic. Oral examination revealed that| 23 were unerupted, a walnut-size, relatively clearly bordered swelling was shown at the labial side of gingiva at 2-4 portion and palpated like parchment in some parts. The surface was bluish without oppressive pain. X-ray examination showed that| 23 were impacted and a monolocular radiolucent area was noted containing the tooth crown of 2, and 5| 5 was congenitally missing. On 2 April the tumor was enucleated together with impacted| 2 under general anesthesia.
    Histologically the tumor parenchyma was composed of cells similar to the enamel organ, showing ductlike structures in the parenchyma, composed of ovoid or short cylindric cells, as well as small calcifications. Histopathologically this case showed the initial developmental stage of adenomatoid odontogenic tumor. Further, the tumor parenchyma appeared and proliferated continuously with the epithelium of cystic wall, a transition picture was shown between the parenchyma and the epithelium of cystic wall. This tumor was considered to be follicular cystic origin.
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  • Toru YOSHIDA, Satoshi NAKAMURA, Satoru SHIOTA
    1984 Volume 30 Issue 11 Pages 1751-1757
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Odontogenic keratocyst is found on rather rare occasions in odontogenic cysts occurring in the jaw bone.
    Recently the authors experienced a case of a 57 year old male patient with odontogenic keratocyst, having algesic swelling centered on the left foramen as chief complaint and indicating a multilocular radiolucent area on X-ray film in a fairly wide range of 1-7, which is reported below.
    Present illness: The patient noticed a swelling of buccogingiva from lower left bicuspid to molar at the beginning of April, 1983, but being indolent it was left untreated. In late September of the same year he caught a cold and in addition to reswelling of buccogingiva in the same area he had cheek swelling. As the treatment received at a surgical clinic did not improve the condition he visited this hospital through indroduction on October, 13th.
    Present condition: In general the patient was medium built and well nourished. Local findings revealed asymmetrical countenance due to a slight swelling centering on mental foramen. The swollen part was reddish with induration as hard as a board. In the mouth 3-6region's buccogingiva was reddish and swollen with fluctuation palpable. An exploratory puncture revealed pus containing blood. Roentgenograpically, in the body of the mandible a multilocular radiolucent area was noted with comparatively clear border containing apices of |456 in cyst. Upon a general blood test and various biochemical examinations an increase of white blood cell count, serum CRP (±), and an increase of ESR to 22mm (1 hour) were observed. Urinalysis revealed normal values. From these clinical and X-ray findings ameloblastoma was doubted, but histopathologically it was diagnosed as odontgenic keratocyst.
    Treatment: He was admitted on October 17th and under general anesthesia, although the jaw bone was invaded in a wide range, oral incision of mucobuccal ford in 1-7 and complete extirpation of the cyst by partial ostectomy as well as extraction of teeth 456 were done. The postoperative course was uneventful. The patient was discharge on November 16 th and has been followed up.
    A study of the cyst extirpated revealed that the cyst wall epithellium consisted of irregularly keratinous stratified squamous epithelium, and the subepithelial part was taken up with comparatively loose connective tissue, while strong round cell infiltration and partly a trend of cord-like proliferation of epithelial layer to subepithelial areawere observed.
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  • Setsuko ITO, Motomasa SASAKI, Shigetaka YANAGISAWA, Harumi MIZUKI, Mas ...
    1984 Volume 30 Issue 11 Pages 1758-1766
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Concerning articulation disorders of Moebius syndrome, three cases were analyzed by point of articulation and one case was enforced speech therapy, obtaining following conclusions.
    1. Articulation disorders were recognized in bilabials, dentals, alveolars, palatals, velars and / e/ vowel, and appeared in wide ranging points of articulation. This tendency was noticed in two out of three cases. The younger case showed only anterior points of articulation, bilabials and alveolars.
    2. In two (cases 1 and 3) out of three cases, the articulation disorders were the most frequently recognized on bilabials, but the other case showed the most disorders in palatals. Therefore, it was suggested that articulation disorders of Moebius syndrome was not always located on the bilabials.
    3. In articulation of bilabials, the tongue was seen between upper and lower dentition, and compensated movement between tongue and upper alveolars was observed. By this compensating method, articulation on /p, b, m/ was good, or some distortion for mild disorders was recovered, but /pj, bj, mil were substituted in each alveolars as / pj→tj, bj→t or d, mj→n.
    4. But this like compensating method of bilabials was not recognized in the child's case. Therefore, it was thought that this function compenstion was mastered with advancing ages.
    5. In the case of the child case, who had been treated only for /p/ sound, showed good result. At the same time, the other bilabials were improved, receiving some good influences from the therapy for /p/ disorder, although the other bilabials were not treated.
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  • Hitoaki NAKAMURA, Kazuo SANO, Akira KITAMURA, Tsugio INOKUCHI, Motomas ...
    1984 Volume 30 Issue 11 Pages 1767-1770
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The patient was a 57-year-old woman. About three years before she had been struck on the right zygomatic region. Two years later she noticed the right maxillary swelling, pain, nasal obstruction, and occasional right nasal bleeding. Symptoms became gradually severe, and on Feb. 14, 1983, she was referred to our clinic by a dentist.
    A maxillary cyst was suspected from the x-rays of panoramic tomography and Waters'view. But on admission, CT scan demonstrated a soft tissue mass which filled out the right maxillary antrum.
    Tumorectomy was done on 16, March, and after that histopathological diagnosis of benign fibrous histiocytoma was made.
    The postoperative course was uneventful and during 16-month interval since surgery, there has been no evidence of recurrence.
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  • Akira KITAMURA, Hitoaki NAKAMURA, Kazuo SANO, Tsugio INOKUCHI
    1984 Volume 30 Issue 11 Pages 1771-1774
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Certain congenital defects of the face, jaws and tongue are often found combined with asymmetric reduction deformities of the distal extremites. A case of hypoglossia-hypodactylia syndrome was reported by Rothenthal in 1932 as an aglossia congenita. Then, Hall reported and restudied this syndrome and used the terms hypoglossia, hypodactylia and hypodactylomelia according to the deformities of the tongue and extremities.
    A twelve year-old female referred to us with complaint of ankyloglossia. X-rays revealed severe hypodactylia of the extremities and hypodontia of the frontal teeth. This rare syndrome was presented with a review of literature.
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  • Masayo KASUYA, Nobuhiko MIZUNO, Masaru NAGAYAMA, Toshio KANEDA, Tohru ...
    1984 Volume 30 Issue 11 Pages 1775-1782
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    With the object of rectifying pronunciation impediments in patients with 3/ 4 glossectomy, improvement was examined following maxillary plate insertion and investigated according to clarity of pronunciation, spectrogram, static paratogram and the ability to phonate.
    1) With the insertion of a maxillary plate we were able to obtain moderate clarity of pronunciation. The improvement seemed to be due to the following factors: A: the oral functional space, formed by maxillary plate insertion commonly called the resonance-chamber, matched well. B: phonic functions, such as expiratory flow, pressure, etcetera, had clearly improved. C: articulation positioning was constructed by the remaining tongue.
    2) Following maxillary plate insertion, excellent improvement was noted in the patient in the Japanese phonetic consonants, especially in bilabial-fricative (p, b), bilabial-nasal (m), bilabialfricative (f. w), alveolar-plosive (ts), alveolar-nasal (n), palato-fricative (c, j) and glottalplosive (h).
    3) Whether the maxillary plate was instered or not, the consonants (s, t, k) were mis-heard as (h).
    4) With the plate inserted, clarity in the pronunciation of vowels (a, i, us, e) resulted in absolute success.
    5) Again, as regards the Japnanese phonetic sounds, previous disturbance in the consonant along the vowel line, a-line, e-line and i-line definitely improved. Unfortunatly good results were not obtained in the u-line and o-line.
    6) In comparison to a normal woman's frequency the vowel formant from the spectrogram, whether the maxillary plate was inserted or not, in the 1st formant had a low frequency tendency and 2nd formant had a high frequency tendency.
    7) When the maxillary plate was removed the difference in the voice bar and spike fill were not present in the spectrogram when the patient attempted to pronounce consonant.
    8) The contact patterns of the static paratogram for alveolar and flapped sounds were indicated in the contact patterns of the static paratogram.
    9) Many patients with discordance or oral functional space caused by glossectomy, and unusally with severe speech impediment, were often neglected in the past. But now comprehension through studies of oral form and function to improve prosthodontic therapy such as the maxillary plate insertion that gives well-matched oral functional space, has and will continue to achieve remarkable results.
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  • Natsuki SEGAMI, Masaru HOSODA, Michio FUKUDA, Sumihisa KOWAKA, Tsuyosh ...
    1984 Volume 30 Issue 11 Pages 1783-1789
    Published: November 20, 1984
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    We experienced a case of ameloblastic fibroma in the mandible of a 20-year-old woman. It is possible that maturation and induction influenced the histogenesis of this tumor. Histopathological identification of this tumor was not possible. We discussed this point with consideration of the literatre and suggested three problems concerning:
    1) the etiology of the mesenchymal proliferation
    2) proof that the mesenchymal component is odontgenic and
    3) the existence or not of maturation and induction in this kind of odontogenic tumor
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