• 대한치과보철학회지
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• 제55권4호
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• pp.403-409
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• 2017

상악 전치부를 발치 해야 하는 경우, 즉시 식립을 통한 임플란트 고정성 보철물의 수복을 고려할 수 있다. 이 경우, 수술 횟수 및 치료기간의 감소, 흡수가 일어나지 않은 잔존 골상에 식립이 가능하다는 장점이 있으나, 연속된 상악 전치부인 경우 임플란트와 임플란트간 거리에 대한 고려 및 예지성 있는 치료를 위한 정확한 진단 및 치료계획의 수립이 추가적으로 고려되어야 한다. 본 증례에서는 63세 남환의 잔존치근을 발거 후 연장된 상악 전치부에 골이식을 동반한 2개의 임플란트 즉시 식립 및 임시 보철물을 장착 후, 임플란트 고정성 보철물로 수복하여 심미적, 기능적으로 만족할만한 임상 결과를 보였기에 이를 보고하는 바이다.

• 대한치과보철학회지
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• 제62권3호
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• pp.234-242
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• 2024

즉시 임플란트 식립과 수복은 치료 기간을 단축하고, 최종 수복 시까지 심미성을 유지할 수 있다는 장점이 있다. 하지만 상악 전치부에서의 단일 임플란트 수복은 심미적인 부분에서 어려움이 있을 수 있는데, 임플란트 식립 중 연조직과 경조직에 전달된 수술적 외상은 향후 심미적 결과에 영향을 미칠 수 있다. 이러한 전치부 임플란트 식립 및 수복 시 예측 가능한 결과를 얻기 위해서는 치간골의 높이, 치은의 특성, 환자 치아의 형태적 특성 등을 고려하여 수술 및 수복 계획을 세워야 한다. 본 증례에서는 경제적 문제로 PFM (Porcelain Fused-Metal) 수복을 원하는 환자의 계획보다 순측으로 식립된 상악 전치부 임플란트를 치은 형성과 디지털 인상을 통해 emergence profile 과 안정화된 연조직 형태를 재현하고자 했다.

• The Journal of Advanced Prosthodontics
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• 제8권2호
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• pp.85-93
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• 2016

PURPOSE. The purpose of this study was to determine the effect of anchorage systems and palatal coverage of denture base on load transfer in maxillary implant-retained overdenture. MATERIALS AND METHODS. Maxillary implant-retained overdentures with 4 implants placed in the anterior region of edentulous maxilla were converted into a 3-D numerical model, and stress distribution patterns in implant supporting bone in the case of unilateral vertical loading on maxillary right first molar were compared with each other depending on various types of anchorage system and palatal coverage extent of denture base using three-dimensional finite element analysis. RESULTS. In all experimental models, the highest stress was concentrated on the most distal implant and implant supporting bone on loaded side. The stress at the most distal implant-supporting bone was concentrated on the cortical bone. In all anchorage system without palatal coverage of denture base, higher stresses were concentrated on the most distal implant and implant supporting bone on loaded side. CONCLUSION. It could be suggested that when making maxillary implant retained overdenture, using Hader bar instead of milled bar and full palatal coverage rather than partial palatal coverage are more beneficial in distributing the stress that is applied on implant supporting bone.

• 대한치과의사협회지
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• 제58권2호
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• pp.83-92
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• 2020

In the anterior maxillary area, dental implants for tooth replacement are challenging due to the need to satisfy high esthetic level as well as functionality. Immediate implant placement and provisionalization can dramatically reduce the edentulous period, and then fulfill patient's demand for esthetics. The aim of present case report is to demonstrate two cases that successfully restored single tooth with immediate implant placement and provisionalization in the anterior maxillary area. A 47 years old female was scheduled to replace her maxillary right central incisor due to crown-root fracture by trauma. Another 54-year-old female was planned to place dental implant following tooth extraction of maxillary right lateral incisor owing to continuous pus discharge despite repetitive treatments including apicoectomy. In these two cases, surgical and prosthetic procedures progressed in a similar way. After minimal flap elevation, atraumatic tooth extraction was performed. Implant was placed in proper 3-dimensional position and angulation with primary stability. Bone graft or guided bone regeneration for peri-implant bone defect was conducted simultaneously. Provisionalization without occlusal loading was carried out at the same day. Each definitive crown was delivered at 7 and 5 months after the surgery. Two cases have been followed uneventfully for 2 to 5 years of loading time. In conclusion, Immediate implant placement and provisionalization could lead to esthetic outcome for single tooth replacement with dental implant under proper case selection.

• 대한치과보철학회지
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• 제55권4호
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• pp.419-426
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• 2017

임플란트는 자각증상을 느끼기 어렵고, 완충역이 없으므로 응력 분포를 고려하지 않는 경우 기계적 실패를 야기할 수 있다. 다수의 상악 전치부 임플란트 수복의 경우 하악의 기능 운동 시 유도를 담당함으로써, 임플란트에 가해지는 측방력의 분산에 중요한 역할을 하므로, 적절한 가이드의 설정이 중요하다. T-scan system을 이용하는 방법은 교합지나 shimstock을 사용하는 기존의 정성적인 방법에 비해, 시간에 따른 교합의 변화와 기능 운동시 접촉되는 치아의 기여정도 및 육안으로 관찰하기 어려운 후방 구치나 반대편 치아의 접촉을 파악하는 등 동적인 교합평가에 유리하다. 본 논문에서는 다수의 상악 임플란트 보철물에 조화로운 전방유도를 부여하기 위하여 T-scan 분석을 활용하는 방법에 관하여 증례를 통해 살펴보고자 한다.

• 대한치과보철학회지
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• 제56권4호
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• pp.354-359
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• 2018

상악 전치부의 단일 임플란트 수복 치료 시, 치은 퇴축 및 골결손 문제를 가질 경우 임플란트 보철의 심미적인 결과를 얻는 것은 쉽지 않다. 장기적으로 심미적 안정성이 유지되기 위해서는 임플란트를 이상적인 위치에 식립하는 것이 중요하며 연조직의 회복 및 보철물과의 조화가 중요하다. 이러한 심미성이 더욱 요구되는 임플란트 보철물의 제작 시 이상적인 임플란트의 위치 뿐만 아니라, 주변 연조직과의 조화 역시 중요하다. 본 증례에서는 상악 전치부에서 골결손과 치은 퇴축이 진행된 47세 남자환자에서 골유도재생술 및 치은재형성술을 통해 심미 임플란트 치료를 진행하였다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제30권3호
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• pp.258-265
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• 2008

Purpose. This multicenter retrospective study was performed to evaluate the survival and success rates of immediate placement of USII and SSII Osstem implant (Osstem implant Co, Korea) on the maxillary and mandibular anterior and premolar areas. Materials and methods. Dental records were obtained in 37 patients who were treated with immediate implantation on the maxillary and mandibular anterior and premolar areas in 6 different clinics. The 98 implants were evaluated both clinically and radiographically using predefined success criteria. Results. There was no failed implant in all patients. The mean follow up period was 24.7 months (ranged from 12 to 58 months), and 25.1 months (ranged from 16 to 35 months) in USII and SSII implants, respectively. The crestal bone loss was 3 mm in 3 USII implants during 41 months, and in 1 SSII implant during 22 months. The overall success rate was 94.2% and 97.7% in USII and SSII implants, respectively. The age, gender, diameter, or length of implants, and type of surgery were not influenced to the success rate of immediate implantation. Conclusion. These results suggest that USII and SSII Osstem implant can be used successfully in immediate implantation on the maxillary and mandibular anterior and premolar areas.

• Journal of Periodontal and Implant Science
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• 제34권1호
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• pp.19-28
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• 2004

Tooth is the most important element in esthetic consideration on facial area. Tooth alignment which is in harmony with gingiva, lips, and face is also key element. The purpose of this study was to give a clinical discipline for restoration of gingival contour, which contains a ratio of maxillary 6 anterior teeth, research for gingival contour etc., in case of rehabilitation of maxillary anterior teeth. 300 Dankook university dental school students ,who is their twenties and free from periodontitis, participate in this study. The result was from each 70 males and females who had normal occlusion and tooth alignment. Length, width and length/width ratio of maxillary 6 anterior teeth were 0.74-0.81 in male, 0.81-0.84 in female. There was significant difference between male and female. The most deepest position of gingiva in maxillary central incisor and canine was located in distal part of teeth and maxillary lateral incisor was middle portion. In maxillary central incisors, gingival line of the most deepest point appeared significant difference between male and female (p<0.01) whereas there was no difference in lateral incisors and canines. Distance between interdental papilla apex and the most deepest portion appeared significant difference between male and female. Distance of the deepest position of gingiva is statistically significant except maxillary central incisors and lateral incisors. Standard deviation and mean of the width of labio-lingual were measured in cervical area and there was a significant difference both male and female.(p<0.01) From this result, we could get the mean of maxillary anterior gingival line and these results have great value in clinical guidance in studying maxillary anterior teeth.

• 구강회복응용과학지
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• 제23권2호
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• pp.145-155
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• 2007

The advent of osseointegration and advances in biomaterials and techniques have contributed to increased application of dental implants in the restoration of maxillary partial edentulous patients. Often, in these patients, soft and hard tissue defects result from a variety of causes, such as infection, trauma, and tooth loss. These create an anatomically less favorable foundation for ideal implant placement. Reconstruction of the atrophic maxillary alveolar bone through a variety of regenerative surgical procedures has become predictable; it may be necessary prior to implant placement or simultaneously at the time of implant surgery to provide a restoration with a good long-term prognosis. Regenerative procedures are used for horizontal and vertical ridge augmentation. Many different techniques exist for effective bone augmentation. The approach is largely dependent on the extent of the defect and specific procedures to be performed for the implant reconstruction. It is most appropriate to use an evidenced-based approach when a treatment plan is being developed for bone augmentation cases. The cases presented in this article clinically demonstrate the efficacy of using a autogenous block graft, guided bone regeneration, ridge split, immediated implant placement technique on the atrophic maxillary area.

• Journal of Periodontal and Implant Science
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• 제28권3호
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• pp.507-517
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• 1998

This study was performed to investigate the soft tissue changes around single implant-supported crowns during followup periods. Twenty patients(31 implants) whose single missing tooth in the maxillary anterior region had been replaced with an single implant-supported crown were recruited for the study. Crown length, soft tissue level and papilla height at the single implant-supported crowns were measured at follow-up examination and calculated from the slides taken at time of crown placement. as well Papilla index was scored from the slides taken at the time of crown placement and follow-up examination. A very little amount of recession occurred and the soft tissue level moved more apically and the papilla height increased significantly (p<0.01). Especially, both mesial and distal papilla index at single implant-supported crowns increased significantly during follow-up periods (p<0.001). When the two slides taken at the time of crown placement and follow-up were compared simultaneously, except one site, papillae size increased at all sites. From the results of the study, the interdental papillae at the single implant-supported crowns seemed to regenerate significantly and their crown margins were stable during follow-up periods. Hence it is indicated that various surgical interventions at on early stage to enhance soft tissue esthetics arourd single implants may be unnecessary.