• 대한치과보철학회지
• /
• 제33권2호
• /
• pp.231-239
• /
• 1995

When the complete denture is made, the record base for jaw relation is divided into temporary record base and permanent record base. However, The temporary record base include some disadvantages such as, the lackness of intimate contact between model and base, the lackness of retention during the jaw relation registration, When we obtained jaw relation the permanent record bases made from heat curing resin were utilized. We could get several advantages as follows : 1. The permanent record base provided intimate contact between the model and record base. 2. In fabricating occlusal rim on record base, the dimensional change of record base was little because the permanent record base was lesser influenced to thermal change of occlusal rim than the temporary record base. 3. At the stage of jaw relation, the retention of final denture could be early checked. 4. It could be able to get more accurate registration of jaw relation because all procedure were done on the same base during the jaw relation, artificial teeth arrangement, try-in, and final denture construction. 5. Although there was an inconvenience due to double curing procedure, the shrinkage rate in resin polimerization was relatively reduced so that more dimensional stability could be taken.

• 대한치과보철학회지
• /
• 제38권3호
• /
• pp.310-320
• /
• 2000

Statement of the problem. The record base in fabricating procedures of the complete denture, as a temporary form for reproducing denture base, is used to record upper and lower jaw relation and to align artificial teeth and try-in it in the mouth. The accuracy of jaw relation record is affected by the accuracy, stiffness and stability of the record base. So, the accuracy of record base is the most important requirements of jaw relation records. Purpose of study. The purpose of this study was to evaluate the gap that occurred over the palatal area of a maxillary record base fabricated with autopolymerizing resin and light-curing resin. Methods/material. The maxillary record bases were fabricated out of autopolymerizing resin that is used the most frequently in clinics and light-curing resin that attracts special attention for its several merits. The light-curing resin was made by two kinds of polymerization methods, which are one step curing method and multiple step curing method. All record bases were cut in certain positions of the master cast 1 hour and 1 day later after fabrication and the accuracy of the master cast was measured and analyzed with a microscope. Results. A pattern of gap formation between the record base and the maxillary cast was observed in all specimens. According to kinds of resins, autopolymerizing resin was significantly more accurate than light-curing resin. There was no statistical difference according to time lapse, and in all three groups, the maximum discrepancy occurred at the posterior border in the mid-palatal region. Conclusion. The autopolymerizing resin is better than light-curing resin, and multiple step curing method is more accurate than one step curing method when using light-curing resin.

• 구강회복응용과학지
• /
• 제30권3호
• /
• pp.238-245
• /
• 2014

무치악 환자에서 기능적으로 우수하고 심미적으로 만족스러운 의치 제작을 위해서는 상, 하악 교합관계, 즉 교합수직 고경과 중심위를 정확하게 결정해야 한다. 수직관계를 결정할 때에는 근육, 상, 하악 치열궁간 거리와 상, 하악 치조제의 평행도 등 여러 요소들이 고려되어야 한다. 또한, 중심위는 모든 하악 운동이 시작되는 재현 가능한 위치로서 기록하는 과정 역시 의치 제작에 매우 중요하다. 만일 이러한 악간관계 채득시 오차가 생기면 결과적으로 제작한 의치가 불편하게 된다. Gothic arch tracer와 같은 트레이싱을 이용하는 방법은 술자가 쉽게 교합수직고경과 중심위를 찾아내고 기록할 수 있는 좋은 방법으로 안정적인 교합수직고경에서 하악의 운동위를 얻기에 유리하다.

• 구강회복응용과학지
• /
• 제40권3호
• /
• pp.142-148
• /
• 2024

목적: 본 연구의 목적은 전악 고정성 보철치료 조건에서 임시 보철물로 확립된 상하악의 관계를 구강스캐너를 통하여 교합스캔을 채득하고 디지털 방식으로 마운팅할 때 교합면간기록의 정확성을 조사하는 것이다. 연구 재료 및 방법: 덴티폼 모형을 사용하여 교합기에서 최대 교두간 접촉위로 부착한 후 상악 전체 치아를 삭제하였다. 임시 보철물을 제작하고 교합 조정을 시행하였다. 삭제한 악궁을 스캔한 뒤, 전치부 혹은 구치부 교합스캔을 통해 디지털 마운팅을 시행하였다. 위치된 교합면간기록의 정확성을 3차원적인 위치 편차와 교합평면의 각도 오차를 통해 평가하였다. 이후 부분 무치악 모델에서도 동일한 절차를 반복하여 디지털 교합면간기록의 정확성을 평가하였다. 통계에는 Kruskal-Wallis 검정과 Mann-Whitney U 검정이 이용되었고, 유의수준은 0.05로 설정하였다. 결과: 디지털 방식으로 설정된 교합면간기록에서 치아 정중부의 위치 오차는 스캔 영역과 잔존 치아 조건에 따라 유의한 차이가 없었다(P = 0.53). 교합평면의 각도 오차는 전치부를 중첩 영역으로 사용했을 때 크게 나타났으며, 양측 구치부를 중첩 영역으로 사용한 경우 작은 오차값을 보였다(P < 0.001). 결론: 전악 고정성 보철 치료 시 임시 보철물로 확립된 상하악 관계를 디지털 방식으로 마운팅을 할 때 양측 구치부 교합 스캔 자료를 사용하는 것이 추천된다.

• 대한치과교정학회지
• /
• 제24권4호
• /
• pp.945-956
• /
• 1994

In the past the jaw and occlusal relationship in centric occlusion were merely considered in case of orthodontic diagnosis and treatment planning. As the fact that functional disturbance of the temporomandibular joint may be caused by occlusal interference was recognized, the importance of functional occlusion and centric relation is emphasized today. Known the importance of centric relation, there are various opinions about definition of centric relation and its taking methods. The purpose of this study was to investigate the relative centric condyle position and to compare the reproducibility of the recordings utilizing different centric relation records obtained by different taking methods. The 15 adults with normal occlusion were participated in this study. Every four centric relation records were taken in each of three methods - leaf gauge, Dawson and myomonitor method. Then the relative centric condyle position, the distance between the condylar position in centric occlusion and the position in centric relation and the reproducibility were studied using SAM 2 articulator and mandibular position indicator. The results were as follows ; 1. The trend of condyle position was different depending on centric relation taking methods. 2. The position of condyle in centric relation by leaf gauge and Dawson methods was superior to that by myomonitor method, and the position by myomonitor method was relatively antero-inferior. 3. The distance between the condylar positions in centric occlusion and the position in centric relation was longest in myomonitor method. 4. The reproducibility had little differences in transverse direction among three methods, while leaf gauge method showed the highest reproducibility and myomonitor method did the lowest reproducibility in antero-posterior and supero-inferior direction.

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

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

• 대한치과보철학회지
• /
• 제56권1호
• /
• pp.64-69
• /
• 2018

치성점액종은 악골에 드물게 발생하는 양성 치성 종양이다. 본 증례의 60대 무치악 남성은 전상악부에 발생한 연조직 종괴 제거를 주소로 내원하였으며 절제 생검 결과 치성 점액종으로 확진되었다. 외과적 제거 후 잔존한 가동조직의 변형을 최소화 하기 위해 고안된 투명 레진 트레이로 인상을 채득하였다. 악간관계기록 및 납의치 시적시에 중립대 영역을 설정하고 기능적 연마면 형태를 인기하여 총의치의 안정성과 유지력을 증진시킬 수 있었다. 치성 점액종 제거 후 가동조직과 중립대를 고려하여 심미적, 기능적으로 만족스러운 총의치를 제작하였기에 이를 보고하는 바이다.

• Journal of Korean Dental Science
• /
• 제15권1호
• /
• pp.61-67
• /
• 2022

Purpose: This study aimed to evaluate the accuracy of bite registration using intraoral scanner based on data trimming strategy for fremitus teeth. Materials and Methods: A reference model was designed by Medit Model Builder software (MEDIT Corp., Seoul). Tooth number 24 and 25 were separated as dies and tooth number 26 was prepared for full-coverage crown. Those were printed using a 3D printer (NextDent 5100). The scanning procedure was performed by a single trained operator with one intraoral scanner (i700; MEDIT Corp.). The scanning groups were divided as follows: group 1 (G1), no fremitus; group 2 (G2), 0.5 mm buccal fremitus in the maxillary left first and second premolar; and group 3 (G3), 1.5 mm buccal fremitus in the maxillary left first and second premolar. Each group was scanned 10 times and were analyzed using the reference model data. Surface-based occlusal clearance was analyzed at the prepared tooth to evaluate accuracy. Result: Mean values of control group (G1) were 1.587±0.021 mm. G2 showed similar values to those from the control group (1.580±0.024 mm before trimming strategy and 1.588±0.052 mm after trimming strategy). G3 showed significantly greater values (1.627±0.025 mm before trimming strategy and 1.590±0.024 mm after trimming strategy) and the differences were found between trimming strategy (P=0.004). Conclusion: Bite trimming strategy for fremitus teeth is a reliable technique to reduce inaccuracies caused by the mobility at maximum intercuspation.

• 대한치과보철학회지
• /
• 제58권3호
• /
• pp.257-267
• /
• 2020

흡착식 의치의 목표는 의치상과 하부 조직 사이의 음압 형성과 점막에 의한 의치 주변의 봉쇄에 의해서 의치의 유지를 강화하는 것이다. 본 환자는 잔존치 발거에 따라 완전무치악 상태로 전환하게 된 환자로, 잔존치조제의 흡수와 설하주름부의 부족으로 의치의 안정과 유지가 부족할 것으로 판단되어 하악 흡착식 의치 수복으로 보철계획을 수립하였다. 하악 안정위에서의 예비인상, Centric Tray^® (Ivoclar Vivadent AG, Schaan, Liechtenstein)를 이용한 잠정적 수직고경 결정, Gnathometer M^® (Ivoclar Vivadent AG, Schaan, Liechtenstein)이 부착된 개인트레이를 이용한 폐구정밀인상 및 악간관계 채득, 기능시 의치의 안정을 고려한 인공치 배열, 기능 및 심미를 고려한 연마면 형성, 중합수축을 최소화하여 의치상 내면적합도를 보전하는 의치상 중합 등의 임상 및 기공과정을 통해 기능 및 심미 전반에 걸쳐 만족스러운 하악 흡착식 의치로 수복하였기에 본 증례를 보고하고자 한다.