• Title/Summary/Keyword: dental prosthetic

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A literature review on implant abutment and soft tissue response (임플란트 지대주와 임플란트 주위 연조직의 반응에 관한 고찰)

  • Lee, Young-Hoon;Ko, Kyung-Ho;Huh, Yoon-Hyuk;Park, Chan-Jin;Cho, Lee-Ra
    • Journal of Dental Rehabilitation and Applied Science
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    • v.32 no.4
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    • pp.263-273
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    • 2016
  • In the implant prosthetic procedure, the soft tissue reaction was varied with the material and surface treatment of the abutment. It may be the cause of the peri-implantitis, and hence it can affect the long-term prognosis of the implant prosthesis. Titania and zirconia abutment presented superior biocompatibility and stable soft tissue reaction, while gold alloy abutment showed unfavorable reaction sometimes. A soft tissue reaction can be differed by the surface characteristics even in the same material type. Because rougher surface induces a bacterial attachment, the part contacting a soft tissue should have smooth surface. Additional surface treatment can enhance the cellular response without increasing bacterial attachment. Repeated removal and insertion of the abutment and the shape of the abutment may affect the soft tissue reaction, also. Ultrasonic cleaning and argon plasma cleaning are effective way to clean the retained micro-dust on the customized abutment.

Prosthetic rehabilitation by obturator considering the biomechanics in partially edentulous patient after maxillectomy (상악골 절제술을 받은 부분 무치악 환자에서 생역학을 고려해 제작한 구개 폐색장치를 이용한 보철 수복 증례)

  • Lee, Kang-Shin;Park, Ju-Mi;Ahn, Seung-Geun;Seo, Jae-Min;Park, Yeon-Hee;Lee, Jung-Jin
    • Journal of Dental Rehabilitation and Applied Science
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    • v.37 no.4
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    • pp.281-293
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    • 2021
  • Patients who went through maxillectomy can have severely impaired swallowing, mastication, and pronunciation functions because of palatal defects. Leakage occurs through the nasal cavity while eating, chewing becomes difficult due to the loss of teeth and alveolar ridges, and oral and nasal passages are not separated, leading to hyper-nasal sound, and significantly reducing the quality of life. To prosthetically reconstruct the defect, the weight of the obturator should be reduced as much as possible to minimize dropout because of gravity, and the bulb of the obturator should be properly extended into the defect to get additional retention and stability. In this case of a partially edentulous patient who underwent additional maxillary resection because of tumor recurrence, a metal framework was designed by applying the basic design principles of removable partial dentures. An obturator with improved retention, stability, and support was fabricated through functional impressions. The patient was satisfied with the improved facial expression, mastication, swallowing, and pronunciation, and showed stable occlusion and oral hygiene management during the follow-up period.

Full mouth rehabilitation using 3D printed crowns and implant assisted removable partial denture for a crossed occlusion: a case report (3D 프린팅 금관과 임플란트 보조 국소의치를 이용한 엇갈린 교합의 전악 수복 증례)

  • Sung-Hoon Lee;Seong-Kyun Kim;Seong-Joo Heo;Jai-Young Koak;Ji-Man Park
    • The Journal of Korean Academy of Prosthodontics
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    • v.61 no.4
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    • pp.367-378
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    • 2023
  • With the recent development of computer-aided design-computer-aided manufacturing technology and 3D printing technology, and the introduction of various digital techniques, the accuracy and efficiency of top-down definitive prosthetic restoration are increasing. In this clinical case, stable occlusion support was obtained through the placement of a total of 9 maxillary and mandibular posterior implants in patient with anterior-posterior crossed occlusion. The edentulous area of the maxillary anterior teeth, which showed a tendency of high resorption of the residual alveolar bone, was restored with a Kennedy Class IV implant assisted removable partial denture to restore soft tissue esthetics. Computed tomography guided surgery was used to place implants in the planned position, double scan technique was used to reflect the stabilized occlusion in the interim restoration stage to the definitive prostheses, and metal 3D printing was used to manufacture the coping and framework. This clinical case reports that efficient and predictable top-down full mouth rehabilitation was achieved using various digital technologies and techniques.

Prosthetic rehabilitation in a Class III malocclusion patient with increasing occlusal vertical dimension (3급 부정교합 환자의 교합수직고경 증가를 동반한 보철 수복)

  • Ha-Eun Choi;Han-Sol Song;Kyung-Ho Ko;Yoon-Hyuk Huh;Chan-Jin Park;Lee-Ra Cho
    • Journal of Dental Rehabilitation and Applied Science
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    • v.39 no.3
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    • pp.133-145
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    • 2023
  • Class III malocclusion with mandibular protrusion can be divided into skeletal and pseudo malocclusion due to tooth displacement. For skeletal malocclusion, favorable treatment results can be obtained by establishing an appropriate vertical and horizontal intermaxillary relationship in order to secure a restoration space and obtain aesthetic and functional results. In this case, complete mouth rehabilitation was performed using an implant and a fixed prosthesis in a patient with mandibular protrusion and anterior teeth wear and reduced occlusal vertical dimension. After cast analysis and digital diagnosis, a provisional restoration with increased vertical dimension was fabricated to secure posterior support and evaluate stable centric occlusion. With the definitive prosthesis reflecting the provisional restoration, favorable function and aesthetics were obtained.

Multiple fixed implant-supported prosthesis using temporary denture and scannable healing abutment: a case report (임시의치와 스캔가능한 치유지대주를 이용한 고정성 임플란트 보철 수복 증례)

  • Hyung-Jun Kim;Hyeon Kim;Woo-hyung Jang;Kwi-dug Yun;Sang-Won Park;Hyun-Pil Lim
    • Journal of Dental Rehabilitation and Applied Science
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    • v.39 no.4
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    • pp.250-259
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    • 2023
  • The use of digital technology in fixed prosthetic treatment using implants enables predictive treatment through diagnosis and virtual surgery by integrating clinical and radiological information of patients. Existing digital scanning methods require several components to be removed, such as removing the healing abutment and connecting the scan body. In the scannable healing abutment developed in consideration of this point, scanning is performed directly on the healing abutment, maintaining soft tissue sealing and simplifying scanning. Digital technology can also be used when obtaining the intermaxillary relationship. Recently, various digital technologies have been reported to acquire the intermaxillary relationship of edentulous patients using surgical guides, patient-specific scanning devices, or scans of the inside of temporary dentures. In this case, the implant-supported fixed prosthesis treatment was performed through scanning the scannable healing abutment and the inner side of the temporary denture to obtain the intermaxillary relationship, thereby simplifying the treatment process and obtaining aesthetically and functionally excellent clinical results.

Improvement of peri-implant complications through customized prosthesis restoration allowing soft tissue space: a case report (연조직 공간을 허용하는 맞춤형 보철 수복을 통한 임플란트 주위 합병증의 개선 증례)

  • Jieun Song;Woohyung Jang;Chan Park;Kwidug Yun;Hyun-Pil Lim;Sangwon Park
    • Journal of Dental Rehabilitation and Applied Science
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    • v.39 no.4
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    • pp.260-266
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    • 2023
  • The concept of 'Implant Supracrestal Complex (ISC)' was introduced as a way to determine the impact of implant prosthetic design form on both short-term clinical outcomes and the long-term prognosis of bone and soft tissues around the implant. Implant-prosthesis-abutment complex design forms, such as implant-abutment design, junction, and location, can have important implications for the stable and healthy long-term maintenance of the tissues around the implant. In this case, a customized concave abutment and a prosthesis with an emergence angle of about 30 degrees were restored to a patient suffering from chronic soft tissue inflammation and pain after restoration of an implant prosthesis. It was confirmed that the new prosthesis improved complications by allowing sufficient bone and soft tissue space, achieved appropriate soft tissue sealing, and maintained the long-term stability of the implant.

Accuracy of the healing abutment and impression coping combined system on implant impression (인상채득이 가능한 치유지대주를 이용한 임플란트 인상채득의 정확성)

  • Jeon, Kyoung-Bae;Lee, Du-Hyeong;Kim, Jung-Han;Hwang, Jun-Ho;Park, Hyun-We;Lee, Kyu-Bok
    • The Journal of Korean Academy of Prosthodontics
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    • v.53 no.2
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    • pp.105-110
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    • 2015
  • Purpose: The purpose of this study was to evaluate the 3 dimensional accuracy of impression taking on the newly developed healing abutment and impression coping combined system comparing conventional pick-up type impression. Materials and methods: For 10 patients who had a single missing tooth on molar area, dental implants (SuperLine; Dentium, Seoul, Korea) were placed and healing abutment (MyHealing; Raphabio Co., Seoul, Korea) abutments were connected. After 3 months, transfer type impression with MyHealing and pick-up type impression with impression coping were performed twice in the same patients, and master models were fabricated. Customized prosthetic abutments (Myplant; Raphabio Co., Seoul, Korea) were milled and connected to the master casts. Through a dental scanner (Scanner S600; Zirkonzahn, South Tyrol, Italy), the master casts were converted into virtual casts. The length and angulation differences between casts were measured using 3 dimentional analysis program (Geomagic Qualify 12; Geomagic, Morrisville, NC, USA). Statistical significance was calculated using Kruskal Wallis test and Mann-Whitney U test (${\alpha}$=.05). Results: The length differences between the two systems were 0.032 mm in sagittal plane, and 0.029 in coronal plane, and 0.023 mm in horizontal plane. The angulation differences were $0.755^{\circ}$ in sagittal plane, and $1.275^{\circ}$ in coronal plane, and $0.420^{\circ}$ in horizontal plane. Conclusion: The accuracy of newly developed healing abutment system is similar to that of conventional pick-up impression. The new system can reduces chair time by not using separate impression coping.

Full mouth rehabilitation for a patient with vertical dimension loss using digital diagnostic analysis: A clinical report (수직고경이 감소된 환자의 디지털 진단 분석을 이용한 완전 구강 회복 증례)

  • Choi, Yeawon;Lee, Younghoo;Hong, Seoung-Jin;Paek, Janghyun;Noh, Kwantae;Kim, Hyeong-Seob;Kwon, Kung-Rock;Pae, Ahran
    • The Journal of Korean Academy of Prosthodontics
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    • v.59 no.4
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    • pp.487-496
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    • 2021
  • Full mouth rehabilitation is re-organizing the occlusion of the remaining teeth and missing teeth considering the functions, esthetics, and neuromuscular harmony. With the loss of multiple teeth, the patient's occlusal plane gradually collapses and the vertical dimension can be reduced. Since reduced vertical dimension can be a potential etiology of the temporomandibular joint and masticatory muscles, prosthetic restoration with increased vertical dimension is required. This case report is about a 68 years old patient with vertical dimension loss due to worn dentition and multiple loss of teeth. In this case, the loss of vertical dimension is assessed carefully using the digital dentistry technology. Using CAD software in digital analysis step, the occlusal plane was established and evaluated using several criteria. Orienting the position of the bone and teeth using CBCT image, patient's condition was visualized in 3 dimension and treatment planning was possible virtually. The information that matches the patient's condylar position with the articulator, which is the virtual face bow, is reproduced on the actual articulator, and evaluated again. After the evaluation, provisional prosthesis was fabricated and it was confirmed that the patient adapts without any abnormality. This was implemented as a final prosthesis. As a result, the patient obtained satisfying results, utilizing the benefits of digital dentistry technology and traditional methods.

Effect of the Number and Location of Implants on the Stress Distribution in Three-unit Fixed Partial Denture: A Three-Dimensional Finite Element Analysis (임플란트 고정성 보철물에서 수와 식립위치 변화에 따른 골과 임플란트에서의 응력분포에 관한 3차원 유한요소법적 연구)

  • Lee, Woo-Hyun;Lim, Jong-Hwa;Cho, In-Ho
    • Journal of Dental Rehabilitation and Applied Science
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    • v.26 no.3
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    • pp.221-239
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    • 2010
  • Bone loss may occur depending on the loading conditions. careful treatment planning and prosthetic procedures are very important factors for the proper distribution of stress. Evaluate the stress distributions according to numbers and location of implants in three-unit fixed partial dentures. A mandible missing the right second premolar, first molar and second molar was modeled. Using the CT data. we modeled a mandible with a width of 15mm, a height of 20mm and a length of 30mm, 2mm-thickness cortical bone covering cancellous bone mallow. An internal type implant and A solid type abutment was used. A model with 3 implants placed in a straight line, offset 1.5 mm buccally, offset 1.5 mm lingually and another model with 3 implants offset in the opposite way were prepared. And models with 2 implants were both end support models, a mesial cantilever model and a distal cantilever model. Three types of loading was applied; a case where 155 N was applied solely on the second premolar, a case where 206 N was applied solely on the second molar and a case where 155 N was applied on the first premolar and 206 N was applied on the first and second molar. For all the cases, inclined loads of 30 degrees were applied on the buccal cusps and vertical loads were applied on the central fossas of the teeth. Finite element analysis was carried out for each case to find out the stress distribution on bones and implants. This study has shown that prostheses with more implants caused lower stress on bones and implants, no matter what kind of load was applied. Furthermore, it was found out that inclined loads applied on implants had worse effects than vertical loads. Therefore, it is believed that these results should be considered when placing implants in the future.

Cell study on the Magnesium ion implanted surface with PSII (PSII를 이용한 마그네슘 이온 주입 임플란트에 대한 MC3T3-E1 골모양 세포 반응 연구)

  • Shin, Hyeong-Joo;Kim, Dae-Gon;Park, Chan-Jin;Cho, Lee-Ra;Lee, Hee-Su;Cha, Min-Sang
    • Journal of Dental Rehabilitation and Applied Science
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    • v.25 no.4
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    • pp.361-374
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    • 2009
  • For successful osteogenesis around the implants, interaction between implant surface and surrounding tissue is important. Biomechanical bonding and biochemical bonding are considered to influence the response of adherent cells. But the focus has shifted surface chemistry. The purpose of this study is to evaluate the MC3T3-E1 osteoblast like cell responses of magnesium (Mg) ion implanted titanium surface produced using a plasma source ion implantation method. Commercially pure titanium disc was used as substrates. The discs were prepared to produce four different surface, A: Machine turned surface, B: Mg implanted surface, C: sandblasted surface, D: sandblasted and Mg implanted surface. MC3T3 El osteoblastic like cells were cultured on the disc specimens. Cell adhesion, proliferation, differentiation, and synthesis of extracellular matrix were evaluated. The cell adhesion morphology was evaluated by SEM. RT PCR assay was used for assessment of cell adhesion, proliferation and differentiation. ALP activity was measured for cell differentiation. The results of this study were as follows: 1. SEM showed that cell on Mg ion groups was more proliferative than that of non Mg ion groups. On the machine turned surface, cell showed some degree of contact guidance in aligning with the machining grooves. 2. In RT PCR analysis, osteonectin and c-fos mRNA were more expressed on sandblasted and Mg ion implanted group. 3. ALP activity was not significantly different among all groups. Within the limitations of this study, the following conclusions were drawn: It might indicate Mg ion implanted titanium surface induce better bone response than non Mg ion groups.