• The Journal of Advanced Prosthodontics
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• 제7권3호
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• pp.191-198
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• 2015

PURPOSE. The purpose of this study was to compare the coronal bone level and patient satisfaction in 1-implant and 2-implant assisted mandibular overdentures. MATERIALS AND METHODS. Twenty patients who had maladaptive mandibular dentures were treated in this study. Patients were randomly divided into two groups. The first group received 1 implant (Simple line II, Implantium, South Korea) in their mandibular midline and the second group received 2 implants in their B and D regions (according to Misch's category). If the primary stability of each implant was at least 60 ISQ, ball attachment was placed and denture relined with soft liner. After 6 weeks, retentive cap incorporated with hard acrylic resin. In the 6 and 12 months recalls, periapical digital radiograph were made and visual analogue scale questionnaires were used to record patient satisfaction. The Friedman test was done for comparing the presurgical and postsurgical parameters in each group and the U-Mann Whitney test (P<.05) was done for comparison of post-treatment results between the two groups. RESULTS. All implants achieved sufficient primary stability to be immediately loaded. Patient satisfaction was high, and there were no significant differences between two groups (P>.05). In addition, mean marginal bone loss was $0.6{\pm}0.67$ mm in the first group and $0.6{\pm}0.51$ mm in the second group, after 12 month. Mean marginal bone loss showed no significant differences between two groups. CONCLUSION. This preliminary one-year result indicated that mandibular overdentures anchored to a single implant can be a safe and cost-effective method as a starting step for implant-overdenture treatment.

• The Journal of Advanced Prosthodontics
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• 제7권4호
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• pp.303-311
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• 2015

PURPOSE. The aim of this study was to compare the changes in retentive force of stud attachments for implant overdentures by in vitro 2-year-wear simulation. MATERIALS AND METHODS. Three commercially available attachment systems were investigated: Kerator blue, O-ring red, and EZ lock. Two implant fixtures were embedded in parallel in each custom base mounting. Five pairs of each attachment system were tested. A universal testing machine was used to measure the retentive force during 2500 insertion and removal cycles. Surface changes on the components were evaluated by scanning electron microscopy (SEM). A Kruskal-Wallis test, followed by Pairwise comparison, was used to compare the retentive force between the groups, and to determine groups that were significantly different (${\alpha}$<.05). RESULTS. A comparison of the initial retentive force revealed the highest value for Kerator, followed by the O-ring and EZ lock attachments. However, no significant difference was detected between Kerator and O-ring (P>.05). After 2500 insertion and removal cycles, the highest retention loss was recorded for O-ring, and no significant difference between Kerator and EZ lock (P>.05). Also, Kerator showed the highest retentive force, followed by EZ lock and O-ring, after 2500 cycles (P<.05). Based on SEM analysis, the polymeric components in O-ring and Kerator were observed to exhibit surface wear and deformation. CONCLUSION. After 2500 insertion and removal cycles, all attachments exhibited significant loss in retention. Mechanism of retention loss can only be partially explained by surface changes.

• 대한치과보철학회지
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• 제60권2호
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• pp.187-194
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• 2022

완전 무치악 환자의 가철성 보철 수복 치료에서 잔존 치조제의 흡수가 심한 경우 임플란트를 이용하면 부가적인 지지, 유지 및 안정을 제공할 수 있다. 환자의 상태에 대한 정확한 진단 및 평가 없이 보철물을 제작하게 되면 생역학적, 기능적, 심미적으로 불리한 치료 결과를 야기하게 된다. 본 증례의 환자는 개인치과의원에서 상·하악 임플란트 피개의치를 제작하였으나 연조직 통증 및 기존 의치 유지력 저하로 재치료를 위해 내원하였다. 진단 결과 기존 의치의 수직고경이 다소 낮게 설정되어 있어 이를 거상하고, milled bar와 부가적인 attachment를 이용한 임플란트 피개의치를 제작하였다. 이를 통해 증진된 구강위생과 기능적, 심미적인 면에서 만족할 만한 결과를 얻었기에 보고하는 바이다.

• The Journal of Advanced Prosthodontics
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• 제15권4호
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• pp.214-226
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• 2023

PURPOSE. This study aimed to compare the bite force (BF) between complete dentures and implant overdentures (IODs) retained by two mandibular implants. Additionally, we evaluated the quality of life (QoL) and patient satisfaction among individuals using IODs. In addition, the effects of demographic parameters such as age and sex, and clinical parameters such as implant length, implant diameter, attachment height, attachment color, and interimplant distance on BF, QoL, and patient satisfaction were evaluated. MATERIALS AND METHODS. A total of 51 edentulous patients rehabilitated with the maxillary complete dentures and mandibular IODs retained by two implants were included in this study. BF was measured using a force meter pre- and post-implant in the same patients. Oral health-related quality of life (OHRQoL) was assessed with the Oral Health Impact Profile (OHIP-14) and patient satisfaction was assessed with the Visual Analog Scale (VAS) questionnaires. RESULTS. It was found that BF values were statistically higher for IODs than complete dentures (P < .001). In terms of attachment height of the OHIP scores, there was a significant difference in the psychological disability and social disability domains (P < .05). When examining the change in patient satisfaction as a function of sex, it was found that mandibular retention satisfaction differed significantly by sex (P < .05), but there was no significant difference in the other domains. CONCLUSION. Within the limitations of this study, it was observed that the BF increased after the use of IODs. Several factors, including age, interimplant distance, attachment height, and attachment color, were found to impact OHRQoL. Sex and implant diameter were identified as factors affecting patient satisfaction.

• 대한치과보철학회지
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• 제61권1호
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• pp.90-99
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• 2023

임플란트 피개의치는 골 흡수가 심한 완전 무치악 또는 부분 무치악 환자의 구강 기능 회복을 위한 치료 방법으로 널리 사용되고 있다. Milled bar를 이용한 임플란트 피개의치의 경우 bar가 임플란트 고정체를 연결 고정하므로 기계적으로 유리하며, bar에 추가적으로 부착 장치를 적용하면 임플란트에 가해지는 응력을 분산시킬 수 있다는 이점이 있다. 본 증례에서는 4개의 임플란트를 사용하여 임플란트 피개의치를 사용하던 환자가 의치의 반복적인 파절과 유지력의 약화로 인해 새로운 보철물 제작을 원하여 ADD-TOC 부착 장치가 부착된 milled bar와 탈착 가능한 지르코니아 보철물을 CAD-CAM 방식으로 제작하였고, 이를 통해 기능적, 심미적으로 만족할 만한 결과를 얻었다.

• 대한치과보철학회지
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• 제29권3호
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• pp.197-203
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• 1991

저작압을 골에 직접 분산시키고 의치를 직접 골에 부착시켜 의치의 안정성을 증진시키는 가능성을 실현하는 것이 오랫동안 보철과의사들의 목표였다. 수십년 동안 골과 티타늄 임프란트가 결합(적합)되는 골융합성 술식이 발전되어 왔으며 이 임프란트의 상부구조물로 고정식 보철물이 받아들여져 왔다. 현재까지 가장 흔한 상부구조는 고정식 보철물이다. 요즈음 골융합성 임프란트에 지지를 받는 오버 덴춰의 술식이 고정식 보철물과 다른 하나의 방법으로 간주되어질 수 있게 되었다. 오버덴춰 술식이 심미적 경제적 이유 그리고 다양하게 적용할 수 있기 때문에 최근에 확대되는 경향이 있다. 골융합성 임프란트에 의한 고정식 보철물에 대한 광범위한 장기 결과들이 있는데 반하여 여러 어태치먼트를 이용한 오버덴춰 술식은 임상결과나 적용에 과한 지식들이 거의 발표되지 않았으며, 현재까지 임프란트 오버덴춰를 가진 환자의 구강기능에 대한 단지 몇개의 연구들만이 발표되었다. 우리는 장기 임상평가에 의해서 임프란트 오버덴춰를 아주 조심스럽게 평가해야 한다.

• 대한치과보철학회지
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• 제40권1호
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• pp.88-97
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• 2002

The purpose of this study was to evaluate a cases which was treated with magnetic attachments on the patients in edentulous mandible and maxilla. Author made magnetic overdenture for two patients and then clinical examination were used for evaluation of the function and change in retention during 30months. Patients showed difficulty in oral hygiene care at the beginning but they go used to it soon. It was effective in promotion of denture retention and stability and also gave patient emotionally uplifting psychologic state. This study suggest that magnetic attachment was effective for the treatment of patients presenting a few remaining teeth or teeth under severe caries or mobility.

• The Journal of Advanced Prosthodontics
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• 제7권5호
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• pp.406-410
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• 2015

Russell-Silver syndrome (RSS) is a congenital disease characterized by short stature due to growth hormone deficiency, physical asymmetry, inverted triangular face, micrognathia, prominent forehead, and hypodontia. This case report presents a prosthetic management of a 6-year-old patient with Russell-Silver syndrome treated with overdentures on the maxilla and the mandible using the remaining primary teeth. Subsequent and comprehensive dental management considering the growth and development of a young patient will be necessary.

• 대한구강악안면임플란트학회지
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• 제19권3호
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• pp.146-152
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• 2015

Mini-dental implants for overdenture applications are increasingly popular due to their ease in placement with simplified, less traumatic surgical protocols in limited-width alveolar ridges. However, the clinical decisions including implant number, position, and loading protocol must be based on a thorough evaluation and evidence-based diagnosis. Herein, we reported a case treated with the current method of mandibular mini-implant supported overdenture.

• 대한치과보철학회지
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• 제50권1호
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• pp.10-20
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• 2012

연구 목적: 이 연구의 목적은 텔레스코픽 크라운 하악 임플란트 지지 피개의치와 치아 지지 피개의치에서 지대치의 수와 위치에 따른 응력 분산을 비교하기 위함이다. 연구 재료 및 방법: 본 연구에서는 임플란트를 4개 식립하고 임플란트 지지 피개의치로 설계하였고, 식립 위치를 견치와 소구치 부위에 위치 별로 3개 또는 2개존재시를 실험군으로 설정하였다. 자연치아를 갖는 경우도 견치와 제2소구치 4개를 가진 경우를 대조군으로 설정하고 부위별로 3개 또는 2개를 가지는 경우를 실험군으로 설정하였다. ANSYS Version 10.1(Swanson, Inc., USA)로 분석하였다. 결과: 악골내 응력의 경우, 전반적으로 임플란트(IM)로만 구성된 경우가 치아(TH)로만 구성된 경우에 비해 응력이 크게 발생하였다. 상부구조의 경우, 치아군(TH)과 임플란트군(IM) 사이의 차이는 크게 없었으며 편측 견치와 제2소구치에 지대치 또는 임플란트가 위치하는 경우 가장 큰 응력이 나타났고 바(bar)에서 발생된 응력이 임플란트와 치아에서 발생되는 응력에 비해 상대적으로 훨씬 크게 발생하였다. 지대치와 임플란트의 경우, 치아군(TH)이 임플란트군(IM)보다 응력이 작게 발생하였다. 결론: 본 연구의 결과로부터 지대치(임플란트 또는 치아)를 설정할 때는 하중작용점과 지대치 사이의 거리가 너무 길어지지 않도록 지대치의 수와 위치를 확보해야 하며 소구치 자리에 지대치를 확보하는 것이 유리하다. 앞으로, 실제 임상에 적용하였을 경우, 임플란트 및 자연치아와 악골에 미치는 결과에 대한 연구가 더 필요할 것으로 생각된다.