In order to examine a way of utilizing the papers published in the field of oral &maxillofacial surgery, the subjects and the references from total 3,392 papers. ; 263 papers in the KJOMS(Journal of Korean Association of Oral &Maxillofacial Surgeons. vol. 17-21), 237 papers in the KJMPRS(Journal of Korean Academy of Maxillofacial Plastic and Reconstructive Surgery. Vol 13-17), 1,233 papers in the JJOMS (Journal of Japanese Association of Oral &Maxillofacial Surgeons. vol 37-41), 1,212 papers in the AJOMS(Journal of American Association of Oral &Maxillofacial Surgeons. vol 49-53), and 447 papers in the International JOMS(Official publication of the International association of Oral &Maxillofacial Surgeons vol 20-25) have been analyzed. The results were as follows: 1. The subjects of KJOMS and KJMPRS were composed of various 28 items. Among 15 main subjects excluding the minor subjects below 1%, there were Aquired deformity &-Reconstruction (17.4%), Jaw deformity (14.2%), Trauma (14.2%) and Malignant tumor (10.8%). 2. The main subjects of JJOMS were Malignant tumor (22.8%) and Benign tumor (20.6%), In AAOMS, Trauma (13.0%), Jaw deformity (13.0%), and malignant tumor 12.4%) were main subjects. In IJOMS Malignant tumor (16.1%), Acquired deformity &Reconstruction (13.0%), and Trauma (10.3%) were main subjects. 3. IN KJOMS and KJMPRS, Scientific and Clinical articles was 63.5% and Case reports was 36.5%. But scientific and Clinical articles was 43.4% and Case reports was 56.6% in JJOMS, 47.1% and 52.9% in AAOMS, 50.1% and 49.9% in IJOMS. 4. The number of institutes in KJOMS and KJMPRS was 46. The main 6 institute published the 57.4% of total articles. In IJOMS, Nationality of the author was composed of 42 nations. West Europe Area published 52.8% of total articles, and The dominant nation of the author were West Germeny (16.3%), U.K. (12.1%), and Japan (11.6%). 5. Authors cited 30.4 references per articles in average, but only 2.7 domestic articles was cited in KJOMS and KJMPRS. It was 17.4 references, but 9.3 domestic articles was cited. In AJOMS and IJOMS, were 19.5 and 18.0 references.
Academies and Institutes ; Asian Continental Ancestry Group* ; Congenital Abnormalities ; Ethnic Groups ; Europe ; Humans ; Japan ; Jaw ; Plastics ; Publications

PURPOSE: This study was intended to evaluate the positional relationship between the hyoid bone and the mandible in patients with mandibular protrusion after mandibular set-back surgery by means of 3D-CT. MATERIALS AND METHODS: Preoperative(3 weeks before) and postoperative (6 weeks after) 3D-CT and cephalogram were taken on 32 patients(12 male, 20 female, mean age of 23.2) treated by bilateral sagittal split osteotomy with rigid fixation. The angular measurement on 3D-CT basilar view were deviation of Me and H, long axis angle of left and right cornu majus. The lineal measurement on 3D-CT basilar view were composed of intercondylar line and coordinates(x,y) of Me and H. The angular and lineal measurement of lateral cephalogram were composed of mandibular plane angle, SNA, SNB, ANB, FH-NA and FH-NB, and coordinates(x,y) of B, Pog, Me and H, PAS, Lpw, MPH and IAS. On the frontal cephalogram, deviation of Me were evaluated. RESULTS: The mean mandibular set-back was 8.0mm horizontally and mandibular plane angle was slightly increased. The hyoid bone was displaced postero-inferiorly, the distance between MP(mandibular plane) and H(hyoid bone) was increased and the posterior airway space values (PAS, Lpw, IAS) were decreased. The coordinates Me(x,y), H(x,y) and deviation angle Me' and H'were revealed the strong positive correlation. CONCLUSION: The results revealed that the horizontal, vertical and transverse relationship of the mandibular and the hyoid bone movements were significantly correlated in patients performed mandibular set-back surgery.
Axis, Cervical Vertebra ; Female ; Humans ; Hyoid Bone* ; Male ; Mandible* ; Orthognathic Surgery* ; Osteotomy

Three-dimensional solid model has not been widely used in surgical prediction of orthognathic surgery because freque from occlusal restorations or prosthesis limited the usefulness of simulated surgery involving occlusion. We prepared three-dimensional(3D) solid model from CT data and integrated the 3D solid model with dental cast using a face-bow transfer technique combined with skeletal reference measurement and confirmation with cephalometric radiographs. With this simple and easy method, it was possible to predict bony interference between the proximal and distal segment of the mandible so that we can prevent condylar displacement after sagittal split ramus osteotomy of the mandible with prominent asymmetry. The method error was within 2mm and it seemed to be useful in preoperative planning for maxillofacial surgery with maxillo-mandibular occlusal change
Mandible* ; Orthognathic Surgery* ; Osteotomy, Sagittal Split Ramus ; Prostheses and Implants ; Surgery, Oral

No abstract available.

No abstract available.
Publications

Bite Force ; Chin ; Humans ; Mandible ; Maxilla ; Maxillary Osteotomy ; Muscle Tonus ; Osteotomy, Sagittal Split Ramus ; Prognathism ; Recurrence

Dentofacial Deformities ; Head ; Humans ; Imaging, Three-Dimensional ; Orthodontic Brackets ; Skull

Diagnosis of dentofacial deformity needs three dimensional comprehensive understanding of craniofacial skeleton. Eventhough three dimensional computerized tomogram has been developed, the quantified measurement analysis is merely depend on cephalomeric analysis. In our pilot study using the ordinary cephalometric radiogram which is commonly used in clinical basis, we tried to reconstruct three dimensional coordinates from frontal and lateral cephalogram taken from five dry skulls attached with small metal ball. To evaluate the reproducibility of the cephalogram, intra-examiner error was measured and compared with the three dimensional coordinates. Fourteen linear measurement of dry skull and three dimensional value has been compared. The results were as follows: 1. The intra-examiner error of the two dimensional cephalogram showed a similar variation below 1 mm in frontal and lateral cephalogram. The error ranged from 0.11-0.13mm in the case of frontal cephalometrics and 0.12-0.57mm for lateral cephalometrics Three dimensional coordinates showed relatively high reproducibility except 7 coordinates out of 90 (7.8%). The average error of the single measurement of x,y,z point shown to be 0.04+/-0.21mm, 0.01+/-0.01mm. 0.08+/-0.08mm. 2. Compare the 14 linear measurement of dry skull and three dimensional measurement, the mean difference was 0.13+/-1.54mm, ranging from 2.59+/-3.00mm (L-Co, R-Co) to 0.01+/-0.38 (ANS, L-Or). From the result by taking real value percentage rate by 3 dimensional measuring value, the mean value was 100.74+/-3.92% and the measurement which showed the most shortening compared with the real value was the distance between R-Or and ANS (97.75+/-3.11%) and the most enlarged measurement was the distance between L-VMC, L-VIC (106.59+/-20.33%). 3. However, compare the real value and two dimensional cephalometric radiograph, difference between the two is significant degree which hinder the use of two dimensional measurement in clinical situation. This potential pitfall of the cephalogram might be overcome by using our three dimensional coordinate system. If the reproducibility of the frontal and lateral cephalogram is achieved, major concern related to the accuracy of three dimensional measurement is correct detection of anatomical landmark. Further investigation of anatomical investigation of facial skeleton will make this system more accurate and popular in clinical field.
Dentofacial Deformities ; Diagnosis ; Pilot Projects ; Skeleton ; Skull

This study was performed to investigate the average anthropometric value of normal Korean men and women and to compare the preceding literatures. Additionally, average Korean profilogram was made to serve as a template for diagnosis of facial form. Eighty five Korean subjects(41 men, 44 women) aged between 21 to 26 were selected by members of the author's department on the basis of intact dentition and Class I occlusion without facial asymmetry. Frontal and lateral photographs were taken under standardized condition with digital camera. The image was magnified and adjusted according to the FH plane of cephalometric radiographs and digitized using personal computer. To compare the Western beauty, 25 esthetically pleasing female was selected to measure various angle and distance of the face. 1. It was possible to calculate the mean coordinate value of Korean normal samples which enables the direct visualization and comparison with the use of template. The method in this study was easy to applicate under the Microsoft Windows bases. 2. Maxillary vertical hypoplasia, upper and lower lip protrusion was characteristics of Korean norms and relatively narrow alar base distance, less conspicuous nasal projection was observed. As the vermilion exposure and upper lip length was more than western norm, chin looks shorter than western. To compare the Korean and Western esthetically pleasing profile, facial convexity and nose was less conspicuous in Korean women.
Beauty ; Chin ; Dentition ; Diagnosis ; Esthetics* ; Facial Asymmetry ; Female ; Humans ; Lip ; Male ; Microcomputers ; Nose

The purpose of this study was to evaluate neurosensory disturbance associated with implant surgery performed by implant practitioner (n=47) composed of trained oral surgeon, periodontist, prosthodontist. The incidence, type and duration of sensory disorder were investigated. Anatomical factor of the patient and experience of operator were also evaluated. The result revealed high incidence of inferior alveolar nerve damage (45%) regardless of experience of implant practitioner. The sensory disturbance sustained within 6 months for 61% of cases, which revealed almost normal recovery of nerve function. Initial neurologic sign after nerve damage was not coincide with their consequence of recovery. Half of the practitioners tried surgical intervention to the implants such as removing the fixture, partial unscrewing or re-implant shorter fixture, of which trial regarded as effective measure for 53% of cases. The result indicates that the objective method of sensory nerve evaluation should be introduced to the implant practitioners and the importance of informed consent for possibility of nerve damage in mandibular implant fixation.
Dental Implants ; Humans ; Incidence ; Informed Consent ; Mandibular Nerve ; Neurologic Manifestations ; Prevalence* ; Retrospective Studies* ; Sensation Disorders