• 대한치과보철학회지
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• 제59권4호
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• pp.487-496
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• 2021

완전 구강 회복이란 구강 내 잔존치아와 결손치아를 수복하여 구강의 건강, 기능 및 아름다움을 개선하고 구강악계의 다른 조직과 조화되도록 회복시켜주는 것을 말한다. 다수 치아가 상실될 경우 환자의 교합평면은 점차 붕괴되어 가며 수직고경이 감소될 수 있다. 감소된 수직고경은 악관절 및 저작근에 잠재적인 병인이 될 수 있으므로 수직고경 증가를 동반한 보철수복이 요구된다. 본 증례 환자는 68세 여환으로, 현재 사용 중인 가철성 국소의치가 파절되어 식사가 불가능한 상태로 보철치료를 통해 저작기능 회복과 마모 치아의 심미적 개선을 주소로 내원하였다. 수직 고경의 상실을 디지털 치과 기술을 사용하였다. 디지털 분석 단계에서 CAD 소프트웨어를 사용하여 교합면을 설정하고 여러 기준을 사용하여 평가하였다. CBCT 영상을 사용하여 악안면계 해부학적 구조물과 치아의 위치를 정렬하여 환자의 상태를 3차원으로 시각화하여 가상으로 치료 계획을 세울 수 있었다. 가상으로 정렬한 가상 페이스보우를 실물 교합기로 옮겨와서 한번 더 진단 분석하였다. 평가 후, 임시보철물을 제작하여 환자가 이상 없이 적응하는 것을 확인하였다. 이를 최종 보철물로 이행하였다. 본 증례를 통해 수직고경이 감소된 68세의 여성 환자에서 가철성 국소의치를 동반한 완전구강회복으로 기능적, 심미적으로 만족스러운 결과를 얻었기에 이를 보고하는 바이다.

• 대한치과보철학회지
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• 제43권2호
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• pp.158-175
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• 2005

Statement of problem. Every effort has been continually made to obtain objectivity in measuring the longevity of fixed restorations, such as by establishing unified judgement standard for deciding success and adopting statistical method that analyzes the data of successful and failed cases at the same time. In Korea, however desired level of development has not to be made in this field yet. Purpose. This study, adopting California Dental Association (CDA) quality evaluation system, established objective standard for deciding success, and inferred the longevity of fixed restorations and their failure analysis through adopting Kaplan-Meier survival analysis. Material and method. In order to assess the longevity of flxed restorations serviced in Korea and causes of failure, a total of 1109 individuals (aged 15-74, 716 women and 393 men loaded with 2551 unit fixed restorations, and 1934 abutments) who lived in Kyung-In Province were examined and the findings were as follows : Results. 1. Length of service of fixed restorations serviced in Korea was 6.86$\pm$0.15 yr (mean), 5.5 yr (median), and the rate of success was 65.82% in 5 year survival, and 21.15% in 10 year survival. 2. When there was patient's need for replacing old prosthetics, longevity of fixed restorations was 7.51$\pm$0.27 yr (mean), 7 yr (median), and the rate of success was 61.08% in 5 year survival, and 17.57% in 10 year survival. 3. Longevity of fixed restorations was longest in the over-sixty age group(9.21$\pm$0.66) and that of the teen age group(3.39$\pm$0.28) was shortest (p<0.05). 4. Longevity of fixed restorations of women (7.38$\pm$0.18 years) was longer than that of men (6.00$\pm$0.26) (p<0.05). 5. As for the provider factor (such as unlicensed performers, university hospitals, and private clinic), there was no statistically significant difference in longevity of fixed restorations. 6. Defective margin (34.78%). periodontal disease (12.15%), periapical involvement (11.73%), was the most frequent causes of failure and poor esthetics group showed the longest life above all (p<0.05). Actual frequent causes of failure after removing old prosthetics were defective margin, periapical involvement, periodontal disease and uncemented restoration. In 75.67% of the cases, abutment state after removing old prosthetics was good enough for loading another prosthetics. 7. There was found to have statistically significant influence between longevity of single crown (6.35$\pm$0.20 yr) and that of 3 unit fixed restorations (7.60$\pm$0.30 y) (p<0.05). In each case the most frequent cause of failure was defective margin. 8. The number of cantilever pontic, pontic/abutment ratio, oral hygiene status were found to have no statistically significant influence on longevity of fixed restorations in all groups (p>0.05). 9. Longevity of fixed restorations made of non precious metal was longest (9.60$\pm$0.40 yr) semi precious and precious trailing behind(p<0.05). 10. Group function group (37.04%) and partial group function group (44.62%) were predominant in frequency but showed no correlation between them and among different types of occlusal plane and different types of occlusal surface (p>0.05). 11. Longevity of fixed restorations was longest in the centric interference group(9.35$\pm$0.62) (p<0.05) among different types of occlusal interference. Conclusion. We found that longevity of fixed restorations serviced in Korea is affected by age, gender and type of material, and that most frequent cause of failure is defective margin. In order to assess the accurate longevity of axed restorations, unified research design. overcoming inter-observer difference and establishing the objective research items are needed. Furthermore, it is thought that prospective approach through thorough study and regular follow-ups is needed just from the start of research. Nationwide detailed studies on length of service of fixed restorations manufactured in Korea are hoped to be conducted hereafter.