• 구강회복응용과학지
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• 제19권2호
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• pp.115-124
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• 2003

One of the important things in the full mouth reconstruction is the determination of therapeutic position. Centric jaw relation is used as a therapeutic position for the full mouth reconstruction. There are several techniques associated with recording this position. Five clinically acceptable techniques are as follows: 1) Swallowing or free closure, 2) Chin point guidance, 3) Bimanual method 4) Myo-monitor technique, 5) Anterior deprogrammer. Centric relation obtained utilizing the anterior acrylic resin platform in this case. Another important thing in full mouth reconstruction is provisional restoration. Provisional restorations are an excellent diagnostic instrument, especially in full remain esthetics, phonetics, function, parafunction, and dysfunction after evaluation and acceptance through clinical trial with the provisional restorations should be accurately transferred to the final restorations to ensure the same clinical success. Especially, anterior guidance should be accurately transferred to the final restorations. An accurate anterior guidance is critical for optimal esthetics, phonetics, comfort, function, stress minimization, and longevity of teeth and restorations. To record optimum anterior guidance, customized anterior guide table is used in this case. Considering previously mentioned points, we did successive treatment. And it resulted in a better situation esthetically and functionally. Followings are what we cared in treating a patient in this case. 1) Accurate centric relation recording 2) Accurate transference of anterior guidance to the final restorations.

• 대한소아치과학회지
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• 제30권2호
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• pp.204-209
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• 2003

9세된 남아가 불안정한 교합을 주소로 내원하였다. 환아의 제1대구치는 치아우식증으로 광범위하게 치관이 파괴되어 환아는 자신의 교두감합위를 찾지 못해 하악을 변위시키면서 교합을 하였고 폐구시마다 동일한 위치로 다물지를 못하였다. 임상검사와 방사선 검사를 통하여 제1대구치에 크라운 수복을 하여 안정적인 교합으로 교합재건을 해주기로 하였다. 치료에 앞서 안정위로 유도하여 환아에게 안정위로 폐구하도록 교육하였고, 근첨형성술(apexification)을 포함한 근관치료와 interocclusal space확보를 위한 치관연장술과 수직고경의 거상을 계획하였다. 근관치료와 치관연장술 후 보철물 제작을 위해 치아를 삭제하고 안정위를 기준으로 수직고경을 증가시켜 임시치관을 제작 및 장착하고 1개월 동안 적응여부를 관찰하였다. 1개월 후 악관절장애등의 증상이 없어 크라운을 제작하였고, 이를 다시 임시장착하고 1개월동안 관찰하여 아무런 증상이나 불편감이 없어 최종접착을 하였다. 크라운을 최종장착한지 4개월 후 검사에서 환아는 안정적인 교합을 형성해가고 있었고, 크라운을 처음 장착했을 때 보였던 전치부 개방교합도 개선되어 정상적인 수평, 수직피개 교합을 보이고 있었다.

• 대한치과보철학회지
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• 제26권1호
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• pp.153-169
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• 1988

There is a little scientific documentation reporting the stress, distribution to the edentulous mandible by different concepts of occlusal scheme. So, this study was to investigate the hypothesis that the magnitude and distribution of the occlusal stresses, transmitted through a mandibular complete denture base to the edentulous mandible, would be influenced by the lingualized occlusion. This investigation was performed to analyze the stresses induced in a three-dimensional photoelastic edentulous mandible, when a load is applied to the denture arranged into lingualized occlusion in centric relation, lateral and protrusive functional position. The mounted denture on a Dentatus Type ARO articulator was loaded in a pure vertical direction with 15kgs on the center of articulator in each case and the stresses were frozen into epoxy edentulous model at $127^{\circ}C$ in the stress freezing furnace. The stress-frozen epoxy models were sliced with diamond disc saw into 4mm thick. The slices were examined with a circular polariscope. The results were as follows: 1. In centric relation, the stresses were low at anteriors, and gradually increase to the premolar, molar area and highest at the first molar and gradually decrease from the second molar and lowest at the retromolar pad region. The lingual side showed higher stresses than labiobuccal side. 2. In lateral functional position, the working side showed higher stresses than the balancing side. In working side, the lingual side showed higher stresses than the buccal side and in balancing side, the buccal side showed higher stresses than the lingual side. 3. In protrusive position, stress distribution was symmetrical on the posteriors and the stresses were concentrated at the labial side of the anteriors.

• The Journal of Advanced Prosthodontics
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• 제2권3호
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• pp.88-91
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• 2010

Mandible fractures belong to the most common fractures encountered in maxillofacial trauma. Because mandible is such a unique structure with hinge joint and masticatory muscles attached to the body of mandible, attention must be paid to avoid displacement during treatment. Displacement during fracture reduction leads to malocclusion. Many TMJs function with complete comfort and apparent normalcy in adapted centric posture, even though they have undergone deformation caused by trauma. This clinical report describes the patient with post traumatic malocclusion and its prosthetic treatment. His fractured mandible was openly reduced in changed position, as a result his occlusion has been changed. He was treated by prosthetic method in so-called adapted centric posture.

• 대한치과교정학회지
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• 제23권1호
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• pp.115-122
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• 1993

This study was undertaken to compare the activity of masticatory muscle between normal occlusion and anterior openbite. 33 subjects without the experience of orthodontic treatment, missing teeth and the symptom of T. M. disorders were selected for this study : 25 subjects were normal occlusion and 8 subjects were anterior openbite. The ten items were measured from the cephalometric headplates, and EMG recordings of the anterior temporal and masseter muscle were taken at rest position and during maximum clenching at centric occlusion. All data were analyzed and processed with the computer statistical method. The following results were obtained : 1. At rest position, the muscle activities of both temporal and masseter muscle were higher in anterior openbite than in normal occlusion. 2. During maximum clenching, the muscle activities of both temporal and masseter muscle were prominently lower in anterior openbite than in normal occlusion. 3. At rest position, the temporal muscle of anterior openbite showed the highest muscle activity, but showed the lowest muscle activity during maximum clenching. 4. Anterior openbite showed closer interrelationship between facial morphology and the muscle activity, and the muscle activity was more influenced by the form of mandible than that of maxilla.

• 구강회복응용과학지
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• 제16권1호
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• pp.37-49
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• 2000

It was clinically important to substitute the physiologic centric relation to the therapeutic position of the patients who needed the oral rehabilitation or occlusal treatment. There were several methods for recording the centric relation. One of the known methods was to use the gothic arch tracer. However the existing intraoral device was difficult to adjust the three dimensional angulation of the recording plate and recording stylus depending on the hinge movement arch of the individual. The purpose of this study was to develop new intraoral tracer which had adjustable stylus within hinge movement arch for the record of centric relation and to evaluate the clinical application of this device. The results were as follow; 1. A stylus of new developed intraoral tracer was so adjustable that the recording of mandibular positions could be reproducible within the hinge movement arc. 2. A record plate of new developed intraoral tracer was so adjustable to parallel with the occlusal plane that lateral recording of mandibular position was able to obtain stably. This study showed that new developed intraoral tracer allowed the determination of the treatment position which can be used in the full mouth rehabilitation and occlusal treatments.

• Journal of Oral Medicine and Pain
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• 제13권1호
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• pp.85-93
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• 1988

The author studied maximum clenching EMG activities of temporalis anterior and masseter muscle during canine guidance and centric occlusion. It was performed before and after anesthesia of maxillary and mandibular canines. The 22 normal subjects (15 males and 7 females) who had healthy maxillary and mandibular canines were selected. Their occlusal contact scheme was canine guidance during movement and they did not have temporomandibular disorder. The results were as follows : 1. The maximum clenching EMG activities of temporalis anterior and masseter muscle during guidance were less than those during centric occlusion. 2. After left maxillary and mandibular canines were anesthetized with 2% lidocanine with 1:100,000 epinephrine, the maximum clenching EMG acivities of temporalis anterior and masseter muscle during left canine guidance were greater than those before anesthesia of left maxillary and mandibular canines(p<0.01) 3. The maximum clenching EMG activities of temporalis anterior and masseter muscle during right guidance were not significantly different between before and after anesthesia of left maxillary and mandibular canines(p>0.05).

• 치과방사선
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• 제17권1호
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• pp.223-232
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• 1987

The author obtained the transcranial-oblique lateral radiograms from 78 patients(26 male, 52 female) with temporomandibular dysfunction problem. And then, the author analyzed the dimensional changes of the TMJ space on centric occlusion, horizontal condylar movement and antero-posterior positional relationship of condyle to the articular eminence on 2.54㎝ mouth opening with clicking, TMJ pain and mouth opening limitation repectively, which were the symptoms of the temporomandibular joint pain dysfunction problem, and compared these data with control group. The results were as follows: 1. In centric occlusion, anterior and posterior TMJ space of experimental group was slightly lesser than those of the control group, also superior TMJ space of experimental group was significantly lesser than that of the control group. (p<0.01) 2. In 2.54㎝ mouth opening, the condylar horizontal movement and the antero-posterior positional relationship to the articular eminence were significantly lesser than those of the control group. (p<0.01) 3. Examined experimental group, the degree of condylar horizontal movement of affected ide was lesser than that of the normal side in 2.54㎝ mouth opening.

• 대한치과보철학회지
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• 제9권1호
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• pp.35-40
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• 1969

The author measured vertical dimension of 675(326 of male and 349 of female) in normal Korean adult from 20 to 50 years of age between upper and lower muco-buccal fold on upper and lower central incisal portion at centric occlusion state. The following results were obtained.; 1) The distances from upper muco-buccal fold on upper anterior central incisal portion to lower muco-buccal fold on lower anterior central incisal portion at centric occlusion state were 37.57mm in male, 36.80mm in female and 37.19mm in average. The distances in male were longer than those of female. 2) According to increase age(from 20 to 50 years of age), the tendencies of vertical dimensional changes were increased slightly in 30~40 years group and decreased after 40 year in both sex. 3) The distances from upper muco-buccal fold on upper anterior central portion to upper central incisal edge were 20.77mm and from lower muco-buccal fold on lower anterior central incisal portion to lower central incisal edge were 18.88mm. The ratio between maxillary distances and mandibular distances was 1.4:0.9.

• 대한치과보철학회지
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• 제55권4호
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• pp.451-457
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• 2017

벨마비는 원인이 명확하지 않은 급성 말초성 안면 신경마비로 주로 편측으로 나타난다. 일부에서는 완전히 회복되지 못하여 안면 근육의 불완전 마비, 구축 등의 후유증으로 인해 하악의 편측 변위 또는 편측 저작 습관 및 부조화가 나타나며, 따라서 만약 무치악 환자에서 총의치로 수복한다면 더욱 세심한 주의가 필요하다. 본 증례에서는 벨마비의 후유증과 불안정한 하악 운동으로 인해 술자에 의한 중심위 채득이 어려운 무치악 환자에서 고딕아치 묘기법으로 재현성 있는 중심위를 채득하고, 중심위와 환자의 습관적인 하악 기능 운동 범위 간의 자유도 부여를 위해 설측 교합을 이용하여 총의치를 제작함으로써 기능 및 심미적으로 양호한 결과를 얻었기에 보고하는 바이다.