• 제목/요약/키워드: the edentulous

검색결과 698건 처리시간 0.019초

Fabricating retrofit crowns to an existing removable partial denture by CAD-CAM: a case report (CAD-CAM을 이용한 RPD 지대치의 retrofit crown 제작 증례)

  • Hyuksoon Lee;Seong-A Kim;Joo-Hyuk Bang;Sung Yong Kim;Hee-Won Jang;Keun-Woo Lee;Yong-Sang Lee
    • The Journal of Korean Academy of Prosthodontics
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    • 제62권2호
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    • pp.140-145
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    • 2024
  • Removable partial denture wearers are exposed to the risks that remaining teeth get damaged by caries, attritions, erosion, and fracture. In the case of damaged abutment tooth which should fit to Removable partial denture (RPD), the fabrication of surveyed crown is followed by the making of RPD. However, making new denture takes a long time, and needs several processes and costs. Also, patients should get used to new denture. If other abutment teeth and edentulous ridges provide the existing denture with support, retention, and stability, use of existing denture is considered clinically acceptable. In this situation, fabricating retrofit crowns to an existing removable partial denture makes patient use existing denture, cuts costs, and reduces discomfort. In this case, severely worn teeth were restored using monolithic zirconia crown which fit to an existing removable partial denture by CAD-CAM. Moreover, support, retention, and stability of the denture were improved, and both doctor and patient were satisfied with the result.

Mandibular implant supported overdentures with two different mini-implant systems: A case report (두 종류의 임플란트 시스템을 이용한 하악의 미니-임플란트지지 피개의치 수복 증례)

  • Park, Jin-Hong;Lee, Jeong-Yol;Ryu, Jae-Jun;Shin, Sang-Wan
    • The Journal of Korean Academy of Prosthodontics
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    • 제54권3호
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    • pp.267-272
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    • 2016
  • This case report describes the treatment of two fully edentulous patients with mini-implant overdentures using different implant systems on narrow mandibular alveolar bone ridge. They were complaining about discomfort and pain wearing mandibular conventional complete dentures caused by insufficient retention. Each patient received four miniimplants in the interforaminal area of the mandible using the non-submerged flapless surgical approach. One-body type implant (Slimline, Dentium, Seoul, Korea) was used for a patient and loaded immediately after surgery. Metal housings of O-ring were attached by direct technique. For the other patient, two-piece type implant (LODI, Zest Anchors, Escondido, CA, USA) was used and impressions were made for attachment connection of the Locator's metal housings after 8 weeks of surgery. Within this case report, mandibular miniimplant overdentures using different implant systems showed improvement of patient satisfaction with favorable peri-implant tissue response 6 months after attachment connection. However, long-term follow-up is needed for further evaluation.

Full mouth rehabilitation of edentulous patient with intellectual disability using implants and monolithic zirconia (1급 지적장애 환자에서 임플란트와 단일 구조 지르코니아를 이용한 완전구강회복 증례)

  • Jeong, Ki-Won;Kim, Sung-Hun;Han, Jung-Suk;Yeo, In-Sung;Yoon, Hyung-In
    • The Journal of Korean Academy of Prosthodontics
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    • 제55권2호
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    • pp.156-163
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    • 2017
  • People with class I intellectual disability need lifelong assistance and protection from their surroundings due to impaired adaptive functioning. They have poor oral health and show higher prevalence of dental caries, periapical inflammation and tooth loss that require proper prosthetic restoration. Because removable prostheses for intellectually disabled patients often lack stability, retention, and maintenance, fixed prostheses are essential and the only available option is dental implants. In this case, a 45 year-old male patient with class I intellectual disability had poor oral hygiene with most of his teeth missing and visited the clinic to recover his masticatory function. Due to such systemic conditions, the definitive restoration of choice was the implant-supported fixed dental prosthesis made of biocompatible and highly strong monolithic zirconia. In consequence of the treatment process, the patient was able to improve his oral environment aesthetically and functionally.

COMPARATIVE STUDIES OF RETENTIVE FORCES IN MAXILLARY OVERDENTURE BAR ATTACHMENTS (상악 임플랜트 Overdenture에서 Bar Attachment 설계에 따른 유지력 변화에 관한 연구)

  • Son Cha-Young;Jeong Chang-Mo;Jeon Young-Chan;Lim Jang-Seop;Jeong Hee-Chan
    • The Journal of Korean Academy of Prosthodontics
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    • 제43권5호
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    • pp.650-661
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    • 2005
  • Statement of problem: It could be hypothesised that attachments, which provide more retention against vortical and horizontal dislodgement, will be associated with more favorable parameters of oral function. Purpose: This study was to provide data of initial retentive force and retention loss of different bar attachment systems recommended for use with maxillary implant overdentures. Material and method: 4 implants were placed in the anterior region of edentulous maxilla, five different systems of bar attachment were fabricated as follows: cantilevered Hader bar using clips (Type 1), Hader bar using clips without cantilever (Type 2), Hader bar using clip and ERA attachment orange male (Type 3), Hader bar using clip and ERA attachment white male (Type 4), and Bar using magnets (Type 5). Each samples were placed in the universal testing machine for determination of retentive forces(at initial and after every 200 cycles up to 1,000 cycles). Results and Conclusion 1. Attachment type 1 showed the biggest initial retentive force followed by type 3, type 2, type 4, and lastly type 5(P<0.001). 2. After 1,000 cycles of repeated removals of attachments, significant loss of retentive forces was taken place except for attachment type 5. 3. After 1,000 cycles of repeated removals, the loss of retentive force between type 1 and type 2, which used Hader bar and clip attachments. was greater in type 1 that had wider clip formation. And between type 3 and type 4, which used ERA attachments, the loss of retentive force was greater in type 4 that had white male attached (P<0.001). 4. After 1.000 cycles of repeated removals, attachment type 3 showed the biggest retentive force followed by type 2, type 4, type 1 and lastly type. 5. There was no significant difference between attachment type 3 and 4, and type 4 and 1(P<0.001).

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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    • 제62권2호
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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.

Esthetic removable partial denture with implants and resin clasp: Case report (임플란트와 레진 클래스프를 이용한 심미 가철성 국소의치 증례)

  • Kim, Su-Min;Jeon, Young-Chan;Jeong, Chang-Mo;Yun, Mi-Jung;Huh, Jung-Bo
    • The Journal of Korean Academy of Prosthodontics
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    • 제53권1호
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    • pp.58-65
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    • 2015
  • For the rehabilitation of fully edentulous patients, implant-supported removable partial dentures can be considered as one of the treatment options with complete dentures or implant-supported overdentures. If removable partial dentures are used in combination with a small number of implants placed in strategically important positions, it can offer additional stability, retention and support through implants and reduce a burden of surgical procedures compared with fixed implant-supported prostheses with extensive implant placement. Moreover, the economical benefit can be expected as well. The purpose of this case report is to present a treatment in which an implant-supported removable partial denture was fabricated considering residual alveolar bone status and demands after teeth loss in a patient who had been using a distal extension removable partial denture for a long period of time. In anterior area, fixed prostheses were fabricated with implant placement and in posterior area, short implants provide only support for the removable partial denture. In addition, denture base and clasp were made of thermoplastic acrylic resin. Finally, functionally and aesthetically satisfying treatment results can be achieved.

Full mouth rehabilitation with implant fixed prostheses using POP bow system and 3D printing gothic arch tracer in a patient with unilateral facial nerve palsy (편측성 안면 신경마비 환자에서 3D printing gothic arch tracer와 POP bow system을 이용한 전악 임플란트 고정성 보철 수복)

  • Seong-Yun Jeong;Chang-Mo Jeong;Mi-Jung Yoon;Jung-Bo Huh;So-Hyoun Lee
    • The Journal of Korean Academy of Prosthodontics
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    • 제62권3호
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    • pp.201-214
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    • 2024
  • In patients with unstable mandibular movements who are accompanied by involuntary facial muscle movements and asymmetrical changes in the facial features, many difficulties exist in determining the vertical dimension of occlusion, recording centric relation, and transferring information about the occlusal plane. In this case, for a patient with unilateral facial nerve palsy who was edentulous for a long period of time, a CAD-CAM provisional prosthesis was fabricated using a 3D printing customized gothic arch tracer and a prefabricated occlusal plane recorder, the POP bow system, to achieve a stable interarch relationship. Afterwards, a full mouth implant fixed prosthesis was fabricated by delivering an appropriate vertical dimension of occlusion, a reproducible centric relation, and a correct three-dimensional occlusal plane, and continuous maintenance was performed to restore functional and aesthetic oral health to the patient.

A conversion to implant assisted removable partial denture in failed fixed implant prosthesis of mandible: A case report (실패한 고정성 임플란트 보철물을 제거 후 임플란트 융합 가철성 국소의치로 전환 치료한 증례)

  • Jin, Seung-Lee;Jeong, Chang-Mo;Yun, Mi-Jung;Huh, Jung-Bo;Lee, Hyeon-Jong;Lee, So-Hyoun
    • The Journal of Korean Academy of Prosthodontics
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    • 제58권2호
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    • pp.161-168
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    • 2020
  • Failure of fixed implant supported prosthesis is caused by biomechanical factors such as excessive occlusal stress and biological factors such as bacterial infections and inflammation. Implants with severe bone resorption that have worsened without being resolved due to implant complications should be removed and then new treatments should be planned, taking into account remaining teeth, remaining implants, and residual alveolar. The patient of this case removed some of fixed implant prosthesis of mandible. The condition of the remaining alveolar bone was reassessed for further implant replacement and a few implants were placed. Then implant assisted removable partial denture (IAPRD) treatment is performed using implant surveyed bridge as abutment. Through this treatment, the clinical results were satisfactory on aspect of masticatory function recovery and oral hygiene management.

Early Marginal Bone Loss around Submerged Implants According to the Patterns of Cover Screw Exposures (Submerged 임플란트에서 덮개나사 노출 양상에 따른 조기 변연골 상실)

  • Choi, Mee-Ra;Park, Chan-Jin
    • Journal of Dental Rehabilitation and Applied Science
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    • 제29권2호
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    • pp.175-182
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    • 2013
  • The purpose of this study was to observe and analyze the initial marginal bone resorption changes according to the patterns of cover screw exposures during healing period followed by implants installation. Total 64 fixtures(TiUniteTM, NobelBiocare, Sweden) were installed in partially edentulous jaws of 28 patients, who were selected retrospectively and were shown at least one cover screw exposure. Cover screw exposures were defined at 1 month recall. According to the patterns of exposures, groups were categorized into group 1 (No exposure), group 2 (pin-point exposure), group 3 (less than 1/2 of cover screw), group 4 (more than 1/2 of cover screw), group 5 (total exposure). Periapical radiographs were taken in purpose of changes of marginal bone level between installation and 2 month recall. Healing abutments were secured on the exposure groups at 2 month recall. Results were as follows: 1. Marginal bone resorptions were identified whenever cover screws were exposed. 2. Group 2 and 3 were shown significantly increased bone loss more than other group (P <.05). 3. Group 4 and 5 were shown significantly increased bone loss more than group 1, however, less than other groups ( P <.05). Conclusionally, cover screw exposure may cause marginal bone resorptions, therefore, early connection of healing abutment is clinically helpful.

Evaluation of 358 Mandibular Poster ior Implants: A 3-year Retrospective Study (하악 구치부위에 식립한 358개 임플란트의 생존율에 대한 3년간 후향적 연구)

  • Yoon, I-Kwon;Lee, Gi;Lee, Dong-Un;Choi, Ju-Young;Yu, Jeong-A;Park, Pil-Gyu;Kim, Jeong-Hee
    • Journal of Dental Rehabilitation and Applied Science
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    • 제26권1호
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    • pp.59-68
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    • 2010
  • Recently, dental implants extensively inserted on edentulous area show highly clinical success rate. However, clinicians cannot exclude the possibility of failure and it often unexpectively occures. Many possible factors associated with failure of dental implants have been reported but controversy exists over the extent to them. In this study, we collected 212 patients who had been inserted 358 dental implants on mandibular premolar and molar area from 2005 to 2006. The survival rate of fixtures was recorded according to age of patients, implantation site, implant system, diameter and length of fixtures. Multi-variable analysis using SPSS chi-square test was operated to verify relation of each factors and survival rates. Accumulative survival rate was 98.3% for 3 years. Only diameter of fixtures was related to the implant survival rate. This may be thought that wider fixtures had been chosen to rescue implants or used in sites of poor bone quality. Further continuous study will be needed for direct guidance associated with survival rate of implants.