• Journal of Oral Medicine and Pain
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• 제12권1호
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• pp.85-93
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• 1987

The author studied on the effect of TMJ sounds to the patterns and ranges of mandibular border movements in horizontal plane with Pantograph (Denar Corp.). For study, 19 patients with TMJ sounds only and 16 students with no TM disorder were selected and classified as experimental group and control group, respectively. The subject performed right lateral movement, left lateral movement, and forward movement. Each movement were performed 3 times and the movement trajectory obtained with mechanical pantograph were observed for accordance of centric relation position, reproducibility and/or restriction of lateral movement paths, deviation of protrusive path in anterior table, restriction of protrusive condylar movement path in posterior horizontal table, presence of Fisher angle in posterior vertical table. And pantographic reproducibility Index (PRI) were obtained with pantronic by the same movement method as in the mechanical pantograph record. The obtained results were as follows : 1. In experimental group, PRI scores in those who show accordance of centric relation position were 14.4, and were 26.53 in those who did not show accordance of centric relation position. However, the PRI scores of the two subgroups show no statistically significant difference in control group. Therefore, in experimental group, the capability of accordance of centric relation position affected largely the PRI scores than in control group. 2. Deviation of protrusive path was opposite to the affected side in experimental group, and was left side in control group. 3. Restriction side of condylar movement in protrusion was ipsilateral to the deviation side in experimental group, but in control group, restriction side was not related to the deviation side. 4. PRI scores in experimental group were 23.2 (moderate dysfunction category), and in control group, were 17.8 (slight dysfunction category). The PRI scores in control group, however, implies that the evaluation of temporomandibular disorders by the PRI scores only may be unreasonable.

• 대한치과마취과학회지
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• 제7권1호
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• pp.22-26
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• 2007

상악과 하악이 선천적으로 붙어서 태어나는 선천성 유합증은 드문 선천성 기형으로 단순히 점막이 붙은 점막유합증에서 악골이 붙은 골유합증까지 다양하게 나타난다. 이중 상악골과 하악골의 골자체가 붙는 골유합증은 아주 드물어서 현재까지 26증례만 보고되고 있는데, 보고된 대부분의 증례는 편측에만 발생하는 불완전형으로 알려져 있다. 7세 된 여아환자가 인디아의 GSR 병원에 입이 벌어지지 않는다는 주소로 내원하였는데 환아의 턱은 완전히 움직이지 않았으며, 2-3 mm 정도 벌어지는 앞니부위에서는 2.5 cm 폭경의 3.0 mm 두께의 단단한 치조점막이 관찰되었다. 전기메스로 전방부의 부착성 섬유밴드를 잘라준 후 즉각적인 개구정도는 16 mm 정도까지 가능하여 구강으로의 기관삽관이 가능하였다. 삽관후 양쪽 후방부 협측점막의 두꺼운 밴드들을 모두 제거하여 개구량을 33 mm까지 증진시킨 후 수술을 종결하였다. 환아의 보호자에게 거즈 블록과 설압자를 이용하여 개구 연습을 능동적으로 시키도록 강조하여 교육하였으며 술후 16개월 경과시까지 특별한 합병증이나 개구량 감소는 관찰되지 않았다. 독립적으로 발생한 선천성 치조점막 유합증 환자에서 비정상적으로 커져있는 과두와 설골이 관찰되었는데, 설-하악 구조의 비정상적인 발육에 기인하여 지속적인 비정상적 운동으로 인한 이차적인 치은과 협점막의 섬유성 부착이 생긴 것으로 추측되었다. 이에 마취과와의 효율적인 협진으로 기관절개술 등의 부가적인 마취방법 없이 효과적으로 치료할 수 있었다.

• Journal of Oral Medicine and Pain
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• 제20권1호
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• pp.185-194
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• 1995

The purpose of this study was to estimate primary diagnosis, prediction of prognosis and recognition fo treatment progress for treatment of TMD patients through measuring the various ranges of mandibular movement in normal and TMDs patients using Mandibular Kinesiograph K-6 Diagnostic system. In normal groups, 20 adults were selected, who have normal or class I molar relationship, and have no symptoms on TMJ and masticatory muscles, and have restorations less than 3 surfaces on each tooth, and have no other prosthetic restoration. In Patients group, we selected 31 outpatients who were confirmed to TMDs with clinical examination and radiographic findings. The obtained results were as follows : 1. In maximal opening, patient group was showed the limitation of vertical movement range (P<0.01) and lager lateral deviation than in normal group (P<0.05). And actual dimensional displacement of opening was calculated larger in normal group (P<0.05). 2. In protrusive movement, patients group was showed the limitation of anteroposterior movement range (P<0.001) and larger deviation than in normal group (P<0.01). And actual 3 dimensional displacement of protrusion was calculated larger in normal group (P<0.001). 3. In lateral maximum excursion, compared with normal group patient group was no significant differences to affected side, but was showed the limitation of lateral movement to unaffected side (P<0.001). 4. There was no significant difference in movement velocity of opening and closing in both groups. 5. Mandibular movement from physiologic rest position to centric occlusion was moved more anteroposteriorly in patient group. 6. Mandibular movement from centric relation to centric occlusion was no significant difference in both groups.

• 대한치과보철학회지
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• 제58권2호
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• pp.130-136
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• 2020

흡착원리를 이용한 총의치 제작은 연하나 저작 등의 운동 시 의치 내면의 음압이 형성되어 의치연 주변의 봉쇄를 이루어 유지와 안정을 향상시키고자 소개된 방식이다. 하악 흡착의치는 특히 변형되기 쉬운 후구치융기를 안정 상태에서 채득하여 개구 시 탈락력을 감소시킨다. 이 증례에서는 하악 치조제 흡수가 심한 무치악 환자에서 흡착원리를 통한 총의치 제작을 통해 의치의 향상된 유지력과 안정 및 환자의 만족도를 얻었다.

• 대한치과기공학회지
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• 제25권1호
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• pp.111-118
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• 2003

I measured the movement range on the hinge articulator and the movement range in an oral. And then I studied to analyze the gap. I got wax records by the movement on the hinge articulator, the movement in an oral and the movement on the hand articulating. I measured the distance of the cusp tips that are close to the mesial direction and the distal direction, the buccal direction and the lingual direction then I compared gaps. As I saw results on data, I knew that the hinge articulator represented the range of mandibular movement restrictively. I could find the decisive contradiction that the sliding movement finished on the hinge articulator although it did not finish in an oral. If the sliding movement does not reappear exactly, it brings a fatal failure to the dental prosthesis. In addition it is impossible that the hinge articulator restores the movement in an oral because the lateral condyle inclination and the horizontal condyle inclination are fixed previously. Therefore dental prosthesisses were made by the hinge articulator, they will interfere with a mastication. I have obtained the following results; 1. The distance of sliding movement on the hinge articulator showed shorter than the distance of sliding movement in oral. This means the increase of cusp inclination of the dental prosthesis that was made on the hinge articulator. Therefore, when the lateral movement occurs in oral, there is a possibility to become the premature as the increase of cusp inclination. 2. The results that were impressed records in oral and impressed records on the hand articulating have many congruities. I think that the simple crown etc. that were made by the hand articulating method except the long span bridge and the free end case that can not measure the vertical dimension exactly can represent similarly the mandibular movement. 3. If we want to represent the mandibular movement similarly, we have to use the articulator that can adjust the horizontal condyle inclination and the lateral condyle inclination at least.

• 대한치과보철학회지
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• 제29권2호
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• pp.161-175
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• 1991

To understand the biomechanics of the mandibular movement of the patients with T.M.J. disorder, it is necessary to analyze the mandibular movement by the least moving points of instantaneous center of rotation on computer screen. In this study, two subjects without T.M.J. disorder and with normal occlusion and few patients with T.M.J. disorder were selected for obtaining the processing data. The habitual opening and dosing movements were recorded by image recognition system of video and computer and then the mandibular movement and the least moving point were analyzed using computer program for image anaysis of specialized points. The results obtained were as follows: 1. The least moving points of control group during opening and dosing were dose to the mandibular foramen, but in the test group there were differences between two positions of the least moving points during opening and closing. 2. The variations of the least moving point were in the range of $0.02\sim0.05cm$ of X-coordinate and $0.07\sim0.10cm$ of Y-coordinate for control group, whereas in the range of $0.05\sim0.30cm$ of X-coordinate and $0.08\sim1.65cm$ of Y-coordinate for test group. 3. The index of variation during opening and dosing movements was shown in $0.8\sim1.0$ for the control group and in $0.56\sim2.6$ for the test group. 4. After the treatment of the test group No. 4 by occlusal splint the least moving point was dose to the mandibular foramen and the index of variation was changed from 25 to 05. 5. The tracing shape of the least moving point in the test group represented the irregularities compared to the control group. 6. The mandibular opening and dosing movements were simulated on the computer screen following the movement of the least moving point of instantaneous center of rotation.

• 대한치과보철학회지
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• 제29권2호
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• pp.295-317
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• 1991

The discrepancy between centric relation and centric occlusion have a great role on the successful prosthodontic and occlusal treatment. This study was performed to investigate the effect of the discrepancy between centric relation and centric occlusion on condylar guidance inclination and Bennett shift (immediate and progressive side shift). Sixteen adults who have physiologically normal occlusion and are free of TMJ dysfunction were selected. The amount of the sagittal CR-CO discrepancy in lower anterior incisor was obtained by Saphon Visi-Trainer. The amount of the CR-CO discrepancy in condylar level was measured on the individualized corrected tomography. Pantronic survey was performed by using a arbitrary hinge axis according to manufacturer's direction. All subjects were divided into two groups, group I (small) and group II (large), according to the amount of CR-CO discrepancy. At first the amount of the CR-CO discrepancy in condylar level between two groups was compared and then the condylar guidance inclination and Bennett shift between two groups were compared and analyzed. The results were as follows; 1. The average CR-CO discrepancy in lower anterior incisors was 0.7mm superoinferiorly, 0.49mm anteroposteriorly, and 0.88 mm in total. The average CR-CO discrepancy in condylar level was 0.43mm. 2. The CR-CO discrepancy measured on teeth level and condylar level were highly correlated (p<0.01). 3. The correlation of the condylar position in the glenoid fossa between two groups was not statistically significant. 4. The large CR-CO discrepancy group showed greater amount of Bennett shift and condylar guidance inclination, but there is no statistical significancy. 5. It seems that the CR-CO discrepancy have greater effect on progressive side shift than other elements of mandibular movements.

• 대한소아치과학회지
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• 제11권1호
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• pp.41-56
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• 1984

The purpose of this study is to obtain the normal range of mandibular movement for 13 year old boys and girls, and to compare it to the range of mandibular movement of class III patient and normal adult for diagnosis and prognosis of class III malocclusion and TMJ dysfunction. The subjects were 20 normal boys 20 normal girls 22 class III boys and 18 class III girls. The author measured the ranges and shapes of movement of the mandible in the frontal, sagittal and horizontal trajectories using Saphon visitrainer C II (Tokyo Shizaisha Inc.) for the subjects. The results obtained are as follows: 1) The mean for maximum right laterotrusion in the frontal trajectory were 11.96mm in N.B., 11.10mm in N.G., 11.32mm in III. B., 11.24mm in III G. The mean for maximum left laterotrusion were 11.48mm, 11.0mm, 10.91mm, 10.44mm respectively, Area of border movement were 7.16cm in N.B., 6.59cm in N.G., 7.29cm in III. B., 7.50cm in III. G. 2) The mean for maximum protrusion in the sagittal trajectory were 11.7mm in N.B., 11.4mm in N.G.,11.87mm in III B., and 11.02mm in III. G. 3) The mean for maximum protrusion in the horizontal trajectory were 10.20mm in N.B.,10.00 mm in N.G., 9.12mm for III. B. and 9.36mm in III. G. 4) The mean for maximum protrusion of Class III subjects were shorter than those of normal subjects. 5) There was no sexual difference in the range of mandibular movement for 13 year old subjects. N.B; Normal boys N.G.; Normal girls III.B.; Class III boys III. G.; Class III girls.

• 구강회복응용과학지
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• 제25권4호
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• pp.431-436
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• 2009

심한 치조골 흡수를 동반한 III급 악골 관계 환자의 총의치 제작의 경우 안정적이고 지속적인 교합을 제공하는 치료계획을 세워야 한다. 불리한 치관 대 치근 비와 임상적 동요도가 관찰되는 하악 잔존치를 고정하여 사용함으로써 환자의 불편감을 줄이고 시간적, 경제적으로 효율적인 치료를 제공할 수 있다. 본 증례에서는 상악 편악 무치악 환자의 기능적인 하악 운동과 조화로운 총의치 균형 교합을 이루기 위해 T-Scan System을 이용하였다.

• Journal of Oral Medicine and Pain
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• 제21권2호
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• pp.369-382
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• 1996

The author performed this study to investige the relationship between condylar movements recorded with Pantronicⓡ and mandibular rotational torque movements with BioEGNⓡ. For this study 56 patients with Temporomandibular disorders(TMD) and 30 dental students without any masticatory signs and symptoms were selected as patients group and control group, respectively. The items recorded with Pantronicⓡ(Denar Corp., USA) were immediate side-shift, progressive side-shift, angle of orbiting path, protrusive path and PRI. BioEGNⓡ(Bioelectric gnathography, Bioresearch Inc., USA) were used to measure the amounts of mandibular rotational torque movements in frontal and horizontal plane, and the distance of mandibular translation at incisal area. Amount of mandibular rotational torque movement depicted between the condyles was automatically analysed by angle and difference in frontal and horizontal plane. The obtained data were processed with SAS program and the conclusion of this study were as follows : 1. Mean values of items between patients group and control group in Pantronic measurements were not significantly different except in left protrusive path and in Pantronic Reproducibility Index(PRI). There were no significant difference of condylar paths by preferred chewing side and affected side between the two groups. 2. The amount of mandibular rotational torque movements were differed in frontal angle and difference on protrusion, and in frontal and in horizontal difference on left excursion between the two groups. But the amounts of translatory movements were actually same on all eccentric movements. 3. The amount of mandibular rotational torque movements with splint mere almost not changed from those without splint, with the exception of in horizontal measurements on protrusion. 4. The correlations of items between in Pantronic measurements and in BioEGN measurements wert not consistently, significant, however, generally the ISS related significantly with horizontal torque movement positively, and with frontal torque movement negatively on the contrary, the PSS showed positive correlation with frontal torque movement, and negative correlation with horizontal torque movement.