• The Journal of Advanced Prosthodontics
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• 제8권4호
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• pp.313-320
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• 2016

PURPOSE. The aim of this study was to evaluate the clinical findings and patient satisfaction on implant overdenture designed with Locator implant attachment or Locator bar attachment in mandibular edentulous patients. MATERIALS AND METHODS. Implant survival rate, marginal bone loss, probing depth, peri-implant inflammation, bleeding, plaque, calculus, complications, and satisfaction were evaluated on sixteen patients who were treated with mandibular overdenture and have used it for at least 1 year (Locator implant attachment: n=8, Locator bar attachment: n=8). RESULTS. Marginal bone loss, probing depth, plaque index of the Locator bar attachment group were significantly lower than the Locator implant attachment group (P<.05). There was no significant difference on bleeding, peri-implant inflammation, and patient satisfaction between the two denture types (P>.05). The replacement of the attachment components was the most common complication in both groups. Although there was no correlation between marginal bone loss and plaque index, a significant correlation was found between marginal bone loss and probing depth. CONCLUSION. The Locator bar attachment group indicates lesser marginal bone loss and need for maintenance, as compared with the Locator implant attachment group. This may be due to the splinting effect among implants rather than the types of Locator attachment.

• 대한치과보철학회지
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• 제58권4호
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• pp.335-341
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• 2020

심한 하악골의 흡수는 총의치 사용에 어려움을 야기한다. 임플란트 피개 의치는 유지, 안정, 지지를 향상시키면서, 덜 침습적이고 경제적인 치료법이다. 현재 Locator 부착 장치는 많은 임상가에 의해 성공적으로 사용되고 있다. Locator 부착 장치의 다음 세대인 Locator R-Tx 부착 장치가 최근에 출시되었다. 이 논문은 새로 출시된 Locator R-Tx 부착 장치를 이용하여 피개 의치를 제작하는 과정 및 Locator R-Tx 부착 장치의 특징들을 기술하였다.

• 대한치과의사협회지
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• 제54권12호
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• pp.1024-1034
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• 2016

Purpose. The purpose of this study was to compare the type and frequency of prosthetic complications associated with attachment types for implant overdenture. Material and methods. In this retrospective study, 38 patients (mean age, 63.5 years) have been treated with implant overdentures from 2007 to 2014. Ten patients received a bar-clip attachment. Eleven patients had received a milled bar with Locator attachment. Seventeen patients had received a Locator attachment. The mean follow-up period was 36.9 months (range, 15-83 months). The type and frequency of prosthetic complications was recorded. The frequency was analyzed to determine the statistical difference among the 3 different attachments by using one-way ANOVA (${\alpha}=.05$) and Bonferroni post hoc method at a 5% level of significance. Results. The total number of prosthetic complications was higher in the bar-clip attachment (55 events) than in the milled bar with Locator attachment (39 events) and the Locator attachment (34 events). There were no statistically significant differences, and the most common prosthetic complication was the loss of retention. In the bar-clip attachment group, the average frequency of prosthetic complications was 3.0 events per prosthesis during the first year. In the milled bar with Locator attachment and Locator attachment groups, the average frequencies were 1.45 events and 2.35 events, respectively. Statistically significant differences were observed in the frequency of the complication. (p = .043) Conclusions. Compared to the bar-clip attachment, implant overdentures that use milled bars with the Locator attachment have a significantly lower incidence of prosthetic complications in the first year of follow-up after placement.

• 구강회복응용과학지
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• 제29권2호
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• pp.127-140
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• 2013

Locator 어태치먼트는 임플란트 유지형 피개의치에 널리 사용하는 어태치먼트로 단일 임플란트에 연결하여 사용하는 개별유지장치이다. Locator 어태치먼트는 수직적으로 적은 공간을 필요로 하며, 유지력과 경사에 따른 나일론 선택이 가능한 특징을 가진다. 이 문헌고찰에서는 Locator 어태치먼트를 사용했을 때 초기유지력, 기능력을 재현한 상태의 유지력 변화에 관해 고찰하였다. 또한 회전자유도와 응력분포에 대해 연구한 문헌을 살펴보았으며 Locator에 관한 보철적 합병증과 유지관리를 연구한 다양한 문헌을 정리함으로써 Locator 어태치먼트의 한계와 장점에 관해 살펴볼 것이다.

• 구강회복응용과학지
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• 제33권3호
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• pp.199-206
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• 2017

최종 수복물을 가철성 국소의치로 계획하였을 때 구강내 소수 잔존 치근을 유지하고 활용한다면, 기능적으로 좀더 나은 결과를 얻을 수 있다. 이번 증례는 소수 치아와 잔존 치근을 갖고 있는 환자에서 'Locator Root Attachment'를 활용하여 상악 가철성 피개의치로 최종 수복한 증례이다. 잔존 치근에 대한 정확한 임상적, 방사선학적 평가 후 어태치먼트를 적용하여 기능적으로 우수한 결과를 얻을 수 있었기에 이에 보고하고자 한다.

• 구강회복응용과학지
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• 제27권2호
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• pp.223-231
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• 2011

본 증례 보고의 목적은 상악 무치악 환자에서 임플란트 지지 피개의치를 위한 $Locator^{(R)}$ attachment가 장착된 새로운 milled titanium bar를 소개하고 새로운 대안으로써의 가능성을 제시하고자 함이다. 56세 남자 환자가 상악 고정성 보철물(10-유닛 브릿지)의 동요도를 주소로 본원에 내원하였다. 악관절 및 치과 치료에 영향을 줄만한 특이한 전신병력은 없었다. 방사선 검사 및 임상 검사 결과, 상악의 경우 모든 잔존치아에서 심한 골흡수와 동요도를 보이고 있어 전악 발치를 시행한 후, 임플란트 지지 피개의치를 제작하기로 하였다. 의치의 안정성과 유지력, 저작효율, 청소의 용이성, 심미성과 발음 그리고 경제적인 측면을 고려하여 $Locator^{(R)}$ 어태치먼트를 CAD/CAM으로 제작된 milled titanium bar에 탭핑(tapping)으로 연결시키는 새로운 디자인을 고안하였으며, 1년 이상 경과 후, 기능과 심미적인 면에서 만족할 만한 성과를 얻었기에 이를 보고하는 바이다.

• 구강회복응용과학지
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• 제28권4호
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• pp.397-406
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• 2012

치아가 상실되면 주위 치조골의 개조와 흡수가 일어나면서 위축성 무치악을 초래하게 되고, 치은부착은 점차적으로 감소된다. 이에 따라 총의치의 지지력 감소, 저작 효율의 저하와 통증으로 인해 무치악 환자들은 의치 사용의 어려움을 경험한다. 이를 개선하기 위해 하악에 2개의 임플란트를 식립하고 어태치먼트를 장착하는 피개의치의 형태가 유지력 측면에서 바람직한 치료 방법으로 우선적으로 고려되고 있다. 본 증례는 오래된 상, 하악 무치악을 가진 환자로 하악에 2개의 임플란트를 식립하고, 상악은 총의치, 하악은 Locator$^{(R)}$ attachment를 이용한 임플란트 피개의치로 제작하였다. 본 증례에서 기능적, 심미적으로 만족스러운 결과를 얻었기에 수복 과정과 결과에 대하여 보고하고자 한다.

• The Journal of Advanced Prosthodontics
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• 제14권1호
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• pp.12-21
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• 2022

PURPOSE. The purpose of this study was to investigate changes in retention and wear pattern of Locator^® and ADD-TOC attachments on a digital milled bar by performing chewing simulation and repeated insertion/removal of prostheses in fully edentulous models. MATERIALS AND METHODS. Locator (Locator^®; Zest Anchors Inc., Escondido, CA, USA) was selected as the control group and ADD-TOC (ADD-TOC; PNUAdd Co., Ltd., Busan, Republic of Korea) as the experimental group. A CAD-CAM milled bar was mounted on a master model and 3 threaded holes for connecting a bar attachment was formed using a tap. Locator and ADD-TOC attachments were then attached to the milled bar. Simulated mastication and repeated insertion/removal were performed over 400,000 cyclic loadings and 1,080 insertions/removals, respectively. Wear patterns on deformed attachment were investigated by field emission scanning electron microscopy. RESULTS. For the ADD-TOC attachments, chewing simulation and repeated insertion/removal resulted in a mean initial retentive force of 24.43 ± 4.89 N, which were significantly lower than that of the Locator attachment, 34.33 ± 8.25 N (P < .05). Amounts of retention loss relative to baseline for the Locator and ADD-TOC attachments were 21.74 ± 7.07 and 8.98 ± 5.76 N (P < .05). CONCLUSION. CAD-CAM milled bar with the ADD-TOC attachment had a lower initial retentive force than the Locator attachment. However, the ADD-TOC attachment might be suitable for long-term use as it showed less deformation and had a higher retentive force after simulated mastication and insertion/removal repetitions.

• 구강회복응용과학지
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• 제30권1호
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• pp.64-70
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• 2014

본 증례는 상악 무치악 환자에서 임플란트 피개의치 제작시 CAD/CAM으로 제작된 milled titanium bar에 Locator$^{(R)}$를 장착한 바 어태치먼트 시스템을 사용한 증례이다. 2년 이상 경과 후, 기능과 심미적인 면에서 만족할 만한 성과를 얻었다.

• The Journal of Advanced Prosthodontics
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• 제9권3호
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• pp.143-151
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• 2017

PURPOSE. The design of the attachment must provide an optimum stress distribution around the implant. In this study, for implant overdentures with a bar/clip attachment or a locator attachment, the stress transmitted to the implant in accordance with the change in the denture base length and the vertical pressure was measured and analyzed. MATERIALS AND METHODS. Test model was created with epoxy resin. The strain gauges made a tight contact with implant surfaces. A universal testing machine was used to exert a vertical pressure on the mandibular implant overdenture and the strain rate of the implants was measured. RESULTS. Means and standard deviations of the maximum micro-deformation rates were determined. 1) Locator attachment: The implants on the working side generally showed higher strain than those on the non-working side. Tensile force was observed on the mesial surface of the implant on the working side, and the compressive force was applied to the buccal surface and on the surfaces of the implant on the non-working side. 2) Bar/clip attachment: The implants on the both non-working and working sides showed high strain; all surfaces except the mesial surface of the implant on the non-working side showed a compressive force. CONCLUSION. To minimize the strain on implants in mandibular implant overdentures, the attachment of the implant should be carefully selected and the denture base should be extended as much as possible.