1.Full mouth rehabilitation in partially edentulous patient with an unstable mandibular position
Donghwi YOOK ; Younghoo LEE ; Seoung-Jin HONG ; Ahran PAE ; Kwantae NOH ; Hyeong-Seob KIM ; Kung-Rock KWON ; Janghyun PAEK
The Journal of Korean Academy of Prosthodontics 2023;61(4):308-315
In the case of a patients who have lost the centric stop and have a staggered occlusion of the residual teeth, various movements occur when the denture is loaded.Implant placement is necessary to reinforce the retention, support, and stabilization elements to reduce denture movement. However, in this case, considering the patient’s age, aversion to surgery, and bone loss, implants were not placed and restoration was performed with a removable partial denture. In this case, it is important to set the correct mandibular position for restoration because the patient has a habit of chewing with the remaining teeth. In this case, a stable mandibular position was established using a gothic arch tracing, and good results were obtained by restoring with partial dentures, so this is reported.
2.Full-mouth rehabilitation of severely attrited dentition with missing posterior teeth: a case report using digital workflow with jaw motion tracking
Chan Young PARK ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Kwantae NOH ; Ahran PAE ; Hyeong-Seob KIM ; Kung-Rock KWON
The Journal of Korean Academy of Prosthodontics 2023;61(4):293-307
Jaw motion tracking, which is introduced in recent case reports, is a method which records the patient’s individualized pathway of the mandibular movements along with facebow transfer, and reproduces the information in the virtual space of computer-aided-design/computer-aided-manufacturing (CAD-CAM) software.In this present case, a collapse of the occlusal plane was observed, due the loss of posterior teeth for a long period. Full-mouth rehabilitation with an increase in the occlusal vertical dimension was planned. First, the patient’s mandibular movements were recorded on the newly established jaw relation by jaw tracking, and this information was assembled with the patient’s intraoral data to create a virtual patient. Implant planning and diagnostic wax-up was done on the virtual patient, leading the fabrication of the provisional prosthesis. On the newly established jaw relation with an increase in the occlusal vertical dimension, canine guidance of the provisional prosthesis was checked. Finally, the provisional prosthesis was carried out to the definitive prosthesis. Using the advantages of the technologies in the digital dentistry, the patient was satisfied with the function and the esthetics after the treatment.
3.Full-mouth rehabilitation of a patient with severe wear using digital facebow transfer and virtual articulator
Jinmook CHUNG ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Kwantae NOH ; Hyeong-Seob KIM ; Kung-Rock KWON ; Ahran PAE
The Journal of Korean Academy of Prosthodontics 2023;61(4):275-283
The progressive wear of teeth is a physiologic process of aging, but excessive wear can lead to occlusal disharmony, tooth sensitivity and pulp exposure, decreased masticatory efficiency, and aesthetic problems. It should be treated by evaluating the cause of tooth wear and establishing a stable centric relation with appropriate vertical dimension of occlusion and occlusal plane. The present case report successfully rehabilitated a full-mouth case of a severely worn dentition with the use of digital facebow transfer and virtual articulator.
4.Full-mouth rehabilitation using digital method to transfer provisional restoration to final fixed implant restoration
Eunhan CHO ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Ahran PAE ; Hyeong-Seob KIM ; Kung-Rock KWON ; Kwantae NOH
The Journal of Korean Academy of Prosthodontics 2022;60(4):362-373
For a full-mouth fixed prosthetic treatment of the edentulous patient, it is essential to confirm the proper tooth position and thorough evaluation of the remaining alveolar bone and soft tissue before surgery. CAD-CAM dentistry and guided implant surgery have such advantages of providing simultaneous planning of surgery and prosthetic treatment to ensure pre-knowledge of the treatment. In this clinical case, using the digital technology, digital temporary denture fabrication, esthetic evaluation before fixed prostheses treatment, and guided surgery planning was possible. After the surgery, previously obtained data was used for fabricating fixed temporary prostheses. Definitive zirconia prostheses transferred from the provisional prostheses were fabricated and functionally and esthetically satisfying results were obtained.
5.Full mouth rehabilitation in edentulous patient with unstable mandibular position using flat table treatment dentures and CAD-CAM technology
Yuyeon KIM ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Kwantae NOH ; Hyeong-Seob KIM ; Kung-Rock KWON ; Ahran PAE
The Journal of Korean Academy of Prosthodontics 2022;60(4):330-338
For edentulous patients with unstable mandibular movements and abnormal facial features due to condylar fractures and morphological abnormalities, it is important to find a stable mandibular position. In this case, the patient’s facial improvement, mandibular movement stability, and denture stability were improved by using flat table treatment dentures. In addition, computer-aided design/manufacturing (CAD-CAM) technology was used in denture fabrication to maintain the vertical dimension and lip support of flat table treatment dentures, we report good results in improving the patient’s discomfort.
6.Full mouth rehabilitation using various digital tools in a patient with collapsed bite due to severe attrition
Sooin MOON ; Younghoo LEE ; Seoung-Jin HONG ; Kwantae NOH ; Ahran PAE ; Hyeong-Seob KIM ; Kung-Rock KWON ; Janghyun PAEK
The Journal of Korean Academy of Prosthodontics 2022;60(4):320-329
Physiological wear of occlusal surface is inevitable throughout the lifetime, and considered to be normal. Pathologic wear, however, may cause fatal damage to the occlusal surface and destroy esthetics and proper anterior guidance. In such cases, rehabilitation of occlusal wear should be followed by thorough evaluation and diagnosis. In this present case, severe occlusal wear was found in the labial surfaces of mandibular anterior teeth and palatal surfaces of maxillary anterior teeth. Occlusal vertical dimension was evaluated and decided to be regained due to insufficient amount of restorative space. After determining new occlusal vertical dimension, diagnostic wax-up is usually performed to continue prosthodontic treatment. In this case with collapsed occlusion and loss of occlusal vertical dimension, conventional diagnostic wax-up was replaced with various digital devices. Diagnostic wax-up was digitally performed in the software and provisional prosthesis was fabricated with digital tools. With verification with provisional prosthesis, the entire dentition was rehabilitated with newly set occlusal vertical dimension and proper anterior guidance.
7.Complete denture rehabilitation utilizing digital process: A case report
Yoojin AN ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Kwantae NOH ; Ahran PAE ; Kung-Rock KWON ; Hyeong-Seob KIM
The Journal of Korean Academy of Prosthodontics 2022;60(4):313-319
Complete dentures are one of the most basic treatment methods for the treatment of edentulous patients. The manufacturing process of traditional complete dentures goes through the steps of taking primary impressions, secondary impressions, jaw relation record, trying in wax denture, and final denture insertion. Multiple visits and complex manufacturing procedures are required, and errors may occur in each step. With the development of digital technology, manufacturing steps have been reduced by introducing digital technology to the denture treatment process. In the process of manufacturing dentures by introducing a digital process, a more precise work is possible using Computer-Aided Design, and it is possible to shorten the period of labor and reduce the number of visits. In this case, the anterior teeth arrangement of the patient’s existing dentures was transferred to the final dentures using a digital method. After taking impression, try-in dentures were digitally fabricated and tried in the oral cavity to evaluate their retention in the oral cavity. Final dentures were manufactured by milling process. The number of visits was reduced, satisfactory retention and stability of dentures were obtained, and aesthetic recovery was achieved.
8.Maxillary overdenture restoration using functionally generated path technique: a case report
Yukyung JO ; Younghoo LEE ; Seoung-Jin HONG ; Kwantae NOH ; Ahran PAE ; Hyeong-Seob KIM ; Kung-Rock KWON ; Janghyun PAEK
The Journal of Korean Academy of Prosthodontics 2022;60(1):55-62
The functionally generated path (FGP) technique, first described by Meyer in 1933, is a method in the oral cavity to use the movement pathway formed by the opposing cusps within the border movement of the mandible. Using this method, an appropriate occlusal shape can be given to the patient. In this case, the FGP technique was selected to provide a bilateral balanced occlusion when restoring the edentulous maxilla that opposes the natural mandibular teeth with irregular arrangement with overdentures. In addition, in order to precisely form the occlusal surface of the posterior region with the FGP technique and to reduce the attrition of denture teeth, zirconia denture teeth, not conventional resin artificial teeth, were individually manufactured. After treatment with these materials and methods, satisfactory results were obtained for both the operator and the patient.
9.Full mouth rehabilitation for a patient with vertical dimension loss using digital diagnostic analysis: A clinical report
Yeawon CHOI ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Kwantae NOH ; Hyeong-Seob KIM ; Kung-Rock KWON ; Ahran PAE
The Journal of Korean Academy of Prosthodontics 2021;59(4):487-496
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.
10.Restoration of anterior teeth with dental implant using multilayer zirconia
Sunghee LEE ; Younghoo LEE ; Seoung-Jin HONG ; Janghyun PAEK ; Kwantae NOH ; Ahran PAE ; Kung-Rock KWON ; Hyeong-Seob KIM
The Journal of Korean Academy of Prosthodontics 2021;59(4):469-477
For successful restoration of maxillary anterior implants, both pink esthetics and white esthetics must be satisfied. For pink esthetic part, the role of appropriate provisional prosthesis restoration is important, and for white esthetic part, the color and shape of the definitive prosthesis is important. Multilayer zirconia can be used for natural tooth appearance due to the higher transparency of the incisal area compared to the conventional monolithic zirconia. Therefore, in this case, white esthetic part was achieved through multilayer zirconia after recovering function and esthetics through appropriate provisional prosthesis in a patient who lost the maxillary anterior teeth.

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