• Title/Summary/Keyword: milled bar

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Implant-assisted removable partial denture using Milled-Bar and Attachment in partially edentulous maxilla: A case report (상악 부분 무치악 환자에서 Milled-bar와 어태치먼트를 이용한 임플란트 부분 피개의치 수복 증례 보고)

  • Jeong, Yun-Su;Jeong, Chang-Mo;Yun, Mi-Jung;Lee, So-Hyoun;Huh, Jung-Bo
    • The Journal of Korean Academy of Prosthodontics
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    • v.60 no.4
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    • pp.412-419
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    • 2022
  • For treatment of partially edentulous patients, a treatment using implant is widely used. Treatment method using implant are implant fixed prostheses and removable partial dentures, and for patients with severe bone resorption, removable implant overdenture with the effects of aesthetic and reducing cost can be used as treatment options. Specially, prosthesis with milled-bar and attachment has the effect of being splinted between implant fixtures, higher retention and stability than conventional removable partial denture. And it has the effect of improvement of aesthetic through lip support by denture base. In this case, the patient with severe alveolar bone resorption and partial edentulous maxilla and mandible was treated by implant-assisted removable partial denture using Milled-bar and ADD-TOC attachment. The esthetic was improved by removing the clasp because of effects of additional retention by using the attachment, and reducing palatal coverage of implant-assisted removable partial denture. The clinical results were satisfactory on the aspect of aesthetic and masticatory function.

Mandibular implant overdenture using milled bar attachment on implants with unfavorable fixture angulation: A case report (불량한 식립 방향을 갖는 임플란트를 이용한 하악 Milled Bar 임플란트 피개의치수복 증례)

  • Seo, Yong-Ho;Jeon, Young-Chan;Jeong, Chang-Mo;Yun, Mi-Jung;Huh, Jung-Bo
    • The Journal of Korean Academy of Prosthodontics
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    • v.54 no.4
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    • pp.401-406
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    • 2016
  • Implant overdenture exhibits higher retention, masticatory function, and patient's satisfaction compared to conventional dentures. Particularly, in treatment of severe alveolar bone resorption, implant overdenture can be considered as the first treatment option. The types of attachments used for implant overdenture can be classified into solitary type, which implants are not connected to each other, and bar type in which implants are connected. In the case of solitary type commonly used in clinical practice, parallel relationship is important. When it is not established, there is a higher risk of attachment wear, retention loss, and frequent visits for maintenance. In this case, satisfactory results have been obtained with implant overdentures using milled bar on two unparallel implants placed on the mandible.

Removable implant-supported partial denture using milled bar with Locator® attachments in a cleft lip & palate patient: A clinical report (구순구개열 환자에서 Locator® 유지장치가 장착된 milled titanium bar를 이용한 가철성 임플란트 피개 국소의치의 보철수복증례)

  • Yang, Sang-Hyun;Kim, Kyoung-A;Kim, Ja-Yeong;Seo, Jae-Min
    • The Journal of Korean Academy of Prosthodontics
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    • v.53 no.3
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    • pp.207-214
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    • 2015
  • Due to the limitations of conventional removable partial denture prostheses to treat a cleft lip & palate patient who shows scar tissue on upper lip, excessive absorption of the maxillary residual alveolar ridge, and class III malocclusion with narrow palate and undergrowth of the maxilla, 4 implants were placed on the maxillary edentulous region and a maxillary removable implant-supported partial denture was planned using a CAD/CAM milled titanium bar. Unlike metal or gold casting technique which has shrinkage after the molding, CAD/CAM milled titanium bar is highly-precise, economical and lightweight. In practice, however, it is very hard to obtain accurate friction-fit from the milled bar and reduction in retention can occur due to repetitive insertion and removal of the denture. Various auxiliary retention systems (e.g. $ERA^{(R)}$, $CEKA^{(R)}$, magnetics, $Locator^{(R)}$ attachment), in order to deal with these problems, can be used to obtain additional retention, cost-effectiveness and ease of replacement. Out of diverse auxiliary attachments, $Locator^{(R)}$ has characteristics that are dual retentive, minimal in vertical height and convenient of attachment replacement. Drill and tapping method is simple and the replacement of the metal female part of $Locator^{(R)}$ attachment is convenient. In this case, the $Locator^{(R)}$ attachment is connected to the milled titanium bar fabricated by CAD/CAM, using the drill and tapping technique. Afterward, screw holes were formed and 3 $Locator^{(R)}$ attachments were secured with 20 Ncm holding force for additional retention. Following this procedure, satisfactory results were obtained in terms of aesthetic facial form, masticatory function and denture retention, and I hereby report this case.

Hybrid Prosthesis Supported by Osseointegrated Implants in Maxilla (골유착성 임프란트에 의해 지지되는 새로운 설계의 Hybrid Prosthesis)

  • Lee, J.S.;Shin, S.W.
    • Journal of the Korean Academy of Esthetic Dentistry
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    • v.8 no.1
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    • pp.46-59
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    • 1999
  • A fixed bridge is preferred as a prosthetic option supported by oral implants. However, it is very difficult to re tore edentulous maxilla with fixed prosthesis in cases with improper position and angulation of fixtures, abnormal jaw relation, and need for proper lip support. Six Br${\aa}$nemark implants were installed in edentulous maxilla opposing mandible with natural dentition. A removable hybrid prosthesis attached to a bar milled by 6 degrees was therefore designed to overcome such disadvantages of fixed prosthesis. Lateral stabilization of removable prosthesis was obtained by framework closely fitting the milled bar. Support for the prosthesis was ensured by three elevated areas on the bar. Two precision attachments(CEKA REVAX) provided appropriate direct and indirect retention without influencing support. A clinical and laboratory procedure was presented.

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Maxillar implant-retained overdenture using CAD/CAM milled zirconia bar with PEKK sleeve: a case report (상악 무치악 환자에서 가공 지르코니아 바와 PEKK 슬리브를 이용한 임플란트 피개의치 증례)

  • Ju, Jin-Seok;Cho, Jin-Hyun;Lee, Cheong-Hee
    • Journal of Dental Rehabilitation and Applied Science
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    • v.33 no.4
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    • pp.307-313
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    • 2017
  • The object of this case report is to introduce milled zirconia bar and PEKK female part made by CAD/CAM technology for bar attachment implant supported overdenture in maxillary edentulous patients. For over 2 years, in terms of function and esthetics, satisfactory result was obtained. Esthetically and functionally satisfactory results were obtained in periodic follow up check.

Changes in periodontal tissue and denture around the implants in the mandibular milled-bar implant overdenture: A 12-year follow-up (하악 Milled Bar 임플란트 피개의치에서 12년 간의 임플란트 주변 치주조직 및 의치의 변화)

  • Choi, Hyun-Suk;Cho, Jin-Hyun
    • The Journal of Korean Academy of Prosthodontics
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    • v.59 no.1
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    • pp.55-62
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    • 2021
  • The mandible has a smaller support area than the maxilla, and in particular, in patients with generalized alveolar bone resorption, the stability of the denture and the masticatory efficiency are significantly low in the case of conventional complete denture, due to the movement of the tongue and mandible. In these patients, implant overdenture is evaluated as a highly predictable treatment method with high retention and stability, and excellent pronunciation and masticatory force. In this clinical case, patient had an edentulous maxilla and generalized alveolar bone resorption in mandible. Therefore, complete denture was placed in the maxilla and implant overdenture using milled bar attachment on 4 implants was placed in the mandible. During the 12-year follow-up period, changes in periodontal tissue and denture around the implants were periodically managed and observed.

Comparison of retentive force and wear pattern of Locator® and ADD-TOC attachments combined with CAD-CAM milled bar

  • Chae, Sung-Ki;Cho, Won-Tak;Choi, Jae-Won;Bae, Eun-Bin;Bae, Ji-Hyeon;Bae, Gang-Ho;Huh, Jung-Bo
    • The Journal of Advanced Prosthodontics
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    • v.14 no.1
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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.

Retreatment of implant overdenture using Milled Bar and Attachment in a patient using a unilateral prosthetic arm: A case report (편측 의수 사용 환자에서 Milled Bar와 Attachment를 이용한 임플란트 피개의치 재수복 증례)

  • Park, So-Hyung;Jeong, Chang-Mo;Yun, Mi-Jung;Huh, Jung-Bo;Lee, So-Hyoun
    • The Journal of Korean Academy of Prosthodontics
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    • v.60 no.2
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    • pp.187-194
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    • 2022
  • The use of implants could improve the support, retention, and stability of removable prosthetic restoration for fully edentulous patients with severe alveolar bone resorption. When the prosthesis is manufactured without accurate diagnosis and evaluation, this may lead to unfavorable treatment result. The patient in this case had the treatment of implant overdentures at a private dental clinic, but visited the hospital for retreatment due to soft tissue pain and decreasing retention of existing dentures. The vertical dimension was raised compared to the existing dentures, and overdentures were manufactured using milled bars and additional attachments. The clinical results were satisfactory in the aspect of improved oral hygiene maintenance, function and esthetics.

Rehabilitation using milled-bar with attachment maxilla overdenture in a patient with peri-implantitis fixed prosthesis: A case report (임플란트 주위염이 발생한 고정성보철 환자에 상악 Milled-bar와 부착장치를 이용한 피개의치로 수복한 증례)

  • Joon-Myung Lee;So-Yeun Kim;Du-Hyeong Lee;Kyu-Bok Lee;Cheong-Hee Lee
    • The Journal of Korean Academy of Prosthodontics
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    • v.62 no.2
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    • pp.123-130
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    • 2024
  • There are various methods for restoring the dentition of completely edentulous patients. Removable complete dentures have the advantage of being relatively economical, but they can be uncomfortable to wear. With the introduction of implant prosthodontics, various options such as implant-supported overdentures and hybrid prostheses have become available. If there is inadequate remaining ridge or limited financial resources, an overdenture supported by a few implants with additional attachments may be more suitable. In this case, due to severe peri-implantitis and other complications, the implants were removed. Subsequently, four implants (two on each side) were placed in the maxilla and a milled-bar with attachment was fabricated for each side of the maxilla.