Annals of Japan Prosthodontic Society
Online ISSN : 1883-6860
Print ISSN : 1883-4426
ISSN-L : 1883-4426
Volume 1, Issue 2
Displaying 1-28 of 28 articles from this issue
Original Articles (Japanese)
  • Toshinobu Abe, Yayoi Okuyama, Shin Kasahara, Kohei Kimura
    2009Volume 1Issue 2 Pages 123-129
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: The purpose of this study was to evaluate the educational effect of visual feedback using computer graphics on tooth preparation practices.
    Methods: A total of 27 dental students prepared an artificial tooth for complete cast restorations in a manikin head. After the first practice, these students were randomly divided into two groups.
    One group attended a 30-minute visual feedback session involving their own preparation work. After feedback, this group prepared an artificial tooth for a second time. The other group (the non-feedback group) practiced a second preparation without any feedback. Between the first practice and the second practice, the quantity of occlusal reduction and axial wall taper were compared between the two groups.
    Results: In the feedback group, at the first practice, the average reductions of the mesiobuccal cusp, distobuccal cusp, and distolingual cusp were 3.1, 2.2, and 1.6 mm, respectively.
    After visual feedback using computer graphics, the average reductions of the mesiobuccal cusp, distobuccal cusp, and distolingual cusp were 1.7, 1.2, and 1.2 mm, respectively. The average reductions showed significant differences at the three cusps. At the first practice, the average axial wall taper in the buccal, mesial, and distal regions was 13.6, 15.4, and 13.2 degrees, respectively. After visual feedback, the average axial wall taper in the buccal, mesial, and distal regions was 6.1, 8.9, and 6.0 degrees, respectively. The axial wall taper showed significant differences among the buccal, mesial, and distal regions.
    In the non-visual feedback group, there were no significant differences in occlusal reductions or the axial wall taper between the first practice and the second practice.
    Conclusion: Visual feedback using computer graphics was effective for tooth preparation practice.
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  • Fumihiko Sato, Shigeto Koyama, Chiba Takahiro, Kenji Kadowaki, Tetsuo ...
    2009Volume 1Issue 2 Pages 130-138
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: The purpose of this retrospective cohort study was to investigate how removable partial dentures (RPDs) affect the periodontal condition of abutment teeth adjacent to an edentulous area.
    Methods: One hundred and sixty-one patients were treated with RPDs, which were delivered by dental students under supervision, at the Tohoku University Hospital between 1996 and 2001. Of the 161 patients, 67 patients who agreed to undergo a follow-up examination were re-examined 5 years after treatment. The study population was categorized into three groups based on the status of the RPDs: successful, replaced and failed. The successful group consisted of 37 patients with 48 RPDs. They had 137 abutment and 219 non-abutment teeth. Of the 81 direct abutment teeth, 41 were adjacent to free-end edentulous areas and 40 adjacent to bounded edentulous areas. The variables analyzed in this study were: 1) O'Leary's Plaque Control Record (PCR), 2) Pocket depth, 3) Miller's tooth mobility, and 4) Bone resorption level. The Wilcoxon signed rank test was used for statistical analysis.
    Results: The abutment and non-abutment teeth showed statistically significant deterioration in PCR, pocket depth and bone resorption level between the time of placement and five years later. However, significant differences were not found in tooth mobility of the abutment teeth, whereas significant improvement was found in the non-abutment teeth. The pocket depth and bone resorption of the direct abutment teeth adjacent to a free-end edentulous area deteriorated significantly, while those adjacent to a bounded edentulous area were unchanged.
    Conclusion: The periodontal condition of the abutment and non-abutment teeth changed in the five years following RPD placement. The effect of wearing RPDs on direct abutment teeth might differ with the location of the teeth and position of the clasp around the tooth.
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  • Hiroaki Katoh, Shin Kasahara, Kohei Kimura, Osamu Okuno
    2009Volume 1Issue 2 Pages 139-147
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: The effects of the consistency of luting agents, axial wall taper of abutment tooth and cement space between crown and tooth on the fitness of the crown after luting were assessed. Crowns were fabricated with a dental CAD/CAM.
    Materials and Methods: 2, 7 and 12 degrees were used as convergence angle of the axial wall. With the 12 degree taper, the cement space setting was 0 μm; with the 2 and 7 degree tapers, the cement space setting was 0, 60, and 120μm. All full-veneer crowns were fabricated with a dental CAD/CAM. Three types of seating agent in different consistencies were used; they included zinc phosphate and adhesive resin cements. After luting the crown and setting the seating agent, the gap between the crown and the die was measured on the vertical cross section under each condition.
    Results: The gap increased as the taper diminished. The gap was on average 175 μm at the margin position with the 2 degree taper with a low-consistency luting agent, which is quite a large value. With the 12 degree taper, the gap in the marginal position after seating with each luting agent was on average 16 μm, and there was no significant difference among the various luting agents. With the 2 degree taper and 60μm space using the zinc-phosphate cement, the gap at the marginal position was 70 μm, which was larger. Furthermore, with the 120 μm space, the gap distance with all luting agents was on average 7 μm, and there was no significant difference among the luting agents.
    Conclusion: 1) The marginal elevations in a full-veneer crown increased as the taper decreased and the consistency of the luting agent increased. 2) With the 12 degree taper, the marginal adaptation of crowns was good with each luting agent. 3) The addition of a cement space resulted in good marginal adaptation.
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  • Naoyuki Shibuya
    2009Volume 1Issue 2 Pages 148-156
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: The purpose of this study was to examine the effects of mastication ability, comfort during chewing and the degree of satisfaction with and without wearing dentures in partial denture wearers on brain function.
    Methods: The subjects were 20 partial denture wearers who visited the clinic for maintenance. The occlusal contact area and occlusal force were measured with and without dentures for the functional assessment. For the subjective assessment of dentures, the Visual Analog Scale (VAS) was used to evaluate comfort during chewing and degree of satisfaction. Electroencephalograms taken for 3 minutes after chewing with and without dentures were analyzed by the Diagnosis Method of Neuronal Dysfunction for brain function assessment. The statistical analyses were performed using Wilcoxon's test and Spearman's rank-correlation coefficient.
    Results: The average occlusal contact area and occlusal force in all subjects increased significantly with dentures (p<0.05). Comfort during chewing with wearing dentures and the degree of satisfaction increased significantly compared to no dentures (p<0.05). Seventeen subjects (n=20) showed an increase in brain function activity (p<0.05). Correlations were found between brain function and each of the occlusal contact area and occlusal force.
    Conclusion: The mastication ability improved by dentures, followed by activation of brain function after chewing. Also, the results suggested that the occlusal contact area and occlusal force had an influence on brain function. However, comfort during chewing and the degree of satisfaction did not influence brain function.
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  • Saiko Ishibashi, Yuji Sato, Noboru Kitagawa, Satoshi Hara, Yumiko Hoso ...
    2009Volume 1Issue 2 Pages 157-165
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: To establish a simple and objective method of assessing the residual ridge height and shape of edentulous patients, we investigated the clinical utility of a newly developed "examination scale" based on our clinical research.
    Methods: The right and left first molar sections of 30 subjects (10 males, 20 females, average age: 79) with edentulous maxillae and mandibles were evaluated. Subjective evaluation and evaluation using an examination scale were carried out by three dentists. Objective evaluation was performed with digital vernier calipers on study models. The examination scale was designed with four grades (U, middle, V, flat) for residual ridge shape and three grades (high, middle, low) for residual ridge height. Agreement among the subjective evaluation, objective evaluation, and examination scale were examined with kappa statistics.
    Results: Marked discrepancies were noted between the subjective evaluation and the objective evaluation regardless of the individual. Agreement between the subjective evaluation and the objective evaluation showed low kappa values (height: maxillas: 0.35, mandibles: 0.53, shape: maxillas: 0.44, mandibles: 0.43). However, relatively low discrepancies were noted between the examination scale and the objective evaluation, and the correlation between the examination scale and the objective evaluation was high with high kappa values (height: maxillas: 0.81, mandibles: 0.66, shape: maxillas: 0.88, mandibles: 0.72).
    Conclusion: The results of using our newly developed examination scale for the residual ridge height and shape of edentulous patients correlated significantly with an objective evaluation, indicating the high clinical utility of this scale.
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  • Hikari Chiba
    2009Volume 1Issue 2 Pages 166-174
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: Artificial teeth that do not compromise masticatory function even after the teeth become worn are necessary to conserve the function of dentures for a long time. The purpose of this study was to observe the morphological changes of artificial teeth by wear, and to discuss the chronological changes of horizontal overlap and fissures.
    Methods: Three types of acrylic resin teeth and three types of hard resin teeth were selected as specimens. Artificial teeth were arranged from the first premolar to the second molar, and a sliding test was performed using a mechanical wear testing device up to 80,000 cycles in water with sand at 37°C. Every 10,000 cycles, the projected area of the horizontal overlap, fissure area, and weight were measured. The results (n=5) were analyzed by two-way ANOVA/Tukey's test (p<0.05).
    Results: No significant difference was found in the changes in horizontal overlap area between acrylic and hard resin teeth. Fissure area rapidly decreased up to 20,000 cycles, and there were significant differences among all the artificial teeth after 50,000 cycles. Also, with A-Bi, H-Tr and H-En, the horizontal overlap and the fissures were conserved after wear. The rate of decrease in tooth weight varied among the artificial teeth.
    Conclusion: The results did not depend on the hardness of the artificial teeth. It is suggested that in artificial teeth that have sufficient horizontal overlap, bucco-lingual diameter and fissures, the horizontal overlap and fissures are conserved after wearing for a long time.
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Review Article
  • Takaharu Goto, Yoshihito Naito, Megumi Watanabe, Yoritoki Tomotake, Ka ...
    2009Volume 1Issue 2 Pages 175-184
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: The Mcgill consensus states that there is now evidence that a two-implant overdenture should be the first choice of treatment for the edentulous mandible. The purpose of this study is to analyze published literature on clinical follow-up studies focusing on three attachments (bar, ball, magnet) of mandibular implant-retained overdentures.
    Study selection: Two databases, PubMed and Japana Centra Revuo Medicina were searched to retrieve research papers on clinical follow-up studies focusing on attachments of mandibular implant-retained overdentures. Twenty-seven papers were selected from the database with the criteria, and they were reviewed. We mainly reviewed: 1) periodontal parameters (marginal bone loss, attachment loss, Periotest value, pocket depth, etc.), 2) mechanical parameters (retention force, maximum bite force, masticatory function), 3) maintenance (incident number to repair and adjustment, etc.), and 4) the patient's subjective satisfaction in each case.
    Results: Patients' subjective with satisfaction implant-retained overdentures with attachments was significantly higher compared to that with conventional dentures without any attachment. The magnet- attachment group was inferior in retention force, incident number to repair and adjustment, and patient's subjective satisfaction. The bar- attachment group was inferior in mucosal incident. The ball- attachment group showed more successful results than the bar and magnet groups.
    Conclusion: This review indicates that, the mandibular implant-retained overdenture is a more satisfactory treatment than conventional dentures for edentulous patients, and that each attachment had its advantages although the ball-attachment group showed more successful results.
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Technical Procedure
  • Ryoji Mutou, Minoru Abe, Fujio Tsuchida, Toshio Hosoi, Yoshihiro Maeda ...
    2009Volume 1Issue 2 Pages 185-190
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Purpose: When magnetic attachments are used as stud attachments, we propose a method in which a magnetic attachment is placed onto the proximal surface of an abutment tooth without pulpectomy and abutment tooth preparation. This method can be used clinically for anterior teeth and premolars, and results in better esthetics than clasps.
    Materials and methods: After a preliminary impression, the partial denture was designed. The location and size of the keeper were determined so that it would remain as hidden as possible and was within the undercut of the proximal surface of the abutment tooth adjacent to the denture. The keeper was adhered to the abutment tooth by a clear resin core. The denture was then prepared according to conventional methods. The magnetic assembly was placed after the patient wore the new denture for some time and the denture was adjusted to ensure stability.
    Discussion: The abutment tooth was hardly damaged by this method. In the new method, the retentive force of the magnetic attachments is less than that by stud attachments. It is important for the clear resin core to fit the abutment tooth for adhering the keeper.
    Conclusion: With the present method, a magnetic attachment keeper is directly adhered to the proximal surface of a natural abutment tooth. It markedly improves denture esthetics, and is an easier clinical technique to perform.
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Case Reports (Specialist)
  • Atsuyo Sakuda
    2009Volume 1Issue 2 Pages 191-194
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 40-year-old female whose chief complaint was esthetic disturbance with her protraction and interdental separation of the maxillary incisor region. A prosthodontic and orthodontic combination therapy that enabled full arch orthodontics with the optimal mandibular position kept by prosthodontic craniomandibular repositioning methodology, e.g., occlusal bonding was utilized in this study. After wearing a stabilization appliance, metal onlays were set on the occlusal surface of the lower molars to keep the mandibular position identical to the removable appliance.
    Discussion: It was possible to stabilize and maintain the optimal mandibular position during orthodontic therapy with the occlusal bonding method.
    Conclusion: This case shows the prosthodontic and orthodontic combination therapy is a useful and preconscious therapy in patients who need simultaneous jaw repositioning and orthodontic treatment.
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  • Yoshiaki Arai
    2009Volume 1Issue 2 Pages 195-198
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: The patient was 40 years old woman with chief complaint by intermittent jaw lock with severe pain. CT and MRI examination showed disc displacement without reduction on both sides and a typical osteoarthrosis of head of mandible, but the mobility of condyles was good. Neurology examination did not show the disorder, but in electromyogram, left side masseter and temporal muscle showed involuntary muscle activity more than 3 times of MVC. It was diagnosed as jaw lock by the hemimasticatory spasm. A prosthetic therapy using the overlay removable partial denture succeeded and was able to control it for masticatory spasm well for 10 years.
    Discussion: It contributed to dramatic decrease of the masticatory spasm onset that occlusal vertical dimension of the overlay removable partial denture decided EMG examination in reference.
    Conclusion: The overlay removable partial denture contributed to control of masticatory spasm and recovery of a chewing function.
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Case Reports (Specialist)
  • Syuntaro Nomoto
    2009Volume 1Issue 2 Pages 199-202
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patients: A 63-year-old male at the first examination. The patient was diagnosed as having squamous cell carcinoma in the mouth floor (T4N2cM0), and received tumor excision surgery, functional dissection in the bilateral cervical regions, and left antebrachial skin flap transplantation. Thereafter, the patient was referred to our department requesting improvement in ingestion, swallowing, and speech. After examination, a mandibular denture and maxillary PAP were inserted. Thereafter, ingestion, swallowing, and speech training was performed.
    Discussion: We judged that adjustment of prosthetic appliances after insertion, ingestion and swallowing instruction, and speech training should be performed in cooperation with the department of oral surgery.
    Conclusion: After the treatment of squamous cell carcinoma in the mouth floor, prosthetic appliances were inserted, and improvement in ingestion and swallowing disorders was noted after chewing, swallowing, and speech functional training and instruction, showing a good clinical course.
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  • Yukinori Maruo
    2009Volume 1Issue 2 Pages 203-206
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: The prosthetic treatment for partially edentulous dentition on maxilla altered from removable partial denture to fixed prosthesis with patient's strong demands.
    Discussion: Removable partial denture or fixed bridge satisfied patient's aesthetic demand with some degree. Recovery of masticatory function also achieved with the treatment process from removable partial denture to fixed partial denture. This was achieved not only by the improvement of masticatory performance with prosthesis but also the change of food acceptance with mental factors. The patient was followed over 3 years with no prosthetic and periodontal complication besides of black triangle.
    Conclusion: Fixed prosthesis was finally satisfied with the patient's demand, though the treatment was altered from removable partial denture to fixed prosthesis.
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  • Wataru Sonoyama
    2009Volume 1Issue 2 Pages 207-210
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: The patient was a 25-year-old male with missing maxillary incisors caused by injury, who had problems in pronunciation and esthetics related to the edentulous space. Removable partial denture was made against the edentulous space in past, but it was not used due to incompatibilities. Autogenous bone graft was carried out to recover bone atrophy, and a implant-supported denture was inserted.
    Discussion: Although accumulated dental plaque was sometimes found, signs of inflammation or progressive bone resorption was not found around implant fixtures during periodical recall. Oral condition-related quality of life (QOL) was evaluated by a self-administered QOL questionnaire, and it was revealed that the patient's oral condition-related QOL was improved after the insertion of an implant-supported fixed prosthesis.
    Conclusion: With an autogenous bone graft to the anterior atrophic maxilla, implant-supported fixed prosthesis could improve patients' QOL.
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  • Wakako Fujinami
    2009Volume 1Issue 2 Pages 211-214
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: The patient was a 58 years old woman. Masticatory disturbance was the chief complaint because of broken of anterior teeth and molar abutment teeth in the bridge on her left maxillary. Briefly after the delivery of a traditional new removable partial denture, the other bridge was broken. Then, another set of dentures was fabricated using magnetic attachments.
    Discussion: Introducing magnetic attachment system improved crown-root ratio of the abutment teeth and caused better esthetic and masticatory efficiency.
    Conclusion: It was useful to use the remainig root with magnetic attachment aggressively. These treatments affected good postoperative progress.
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  • Riichi Ouchida
    2009Volume 1Issue 2 Pages 215-218
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 71 years old male presented with free-end partially edentulous, complaining of masticatory dysfunction with his mandibular bilateral extension base denture. We selected the dental implant treatment for maxillary and mandibular rehabilitation with careful consideration to the occlusal support and Eichner classification.
    Discussion: The definitive prosthesis of implants beyond 5 years from the end of treatment preserves occlusal function. During Follow-up, the chipping of facing material of the crown occurred. We suspected that the chipping occurred by the differences of the amount of tissue displacement between natural teeth and dental implants. However, the problem of the chipping was solved only by the polishing correctly.
    Conclusion: Implant treatment, situated at the proper placement and position, was more effective for recovery and preservation of occlusal function than the birateral extension base denture.
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  • Yusuke Maruyama
    2009Volume 1Issue 2 Pages 219-222
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 65-year-old female complained of masticatory and esthetic disorders. We diagnosed that five teeth were not available. This patient had a few remaining teeth following tooth extraction, so that prosthetic treatment with the cone-crown-telescope system for this patient was achieved to gain longitudinally stable oral functions.
    Discussion: We consider that this patient was followed up in good conditions, because she was performed prosthetic treatment using the rigid support concept in the maxillary to repress the movement of a denture substantially, and to protect the abutment teeth and the residual ridge from the pressure of mandibular anterior teeth.
    Conclusion: We report that cone-crown-telescope prosthesis for a patient with a few remaining teeth was effective in recovering masticatory system and esthetic restoration.
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  • Tohru Sato
    2009Volume 1Issue 2 Pages 223-226
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 52-year-old male patient who underwent hemi-mandibulectomy due to cancer visited our hospital with chief complaint of masticatory dysfunction. As his oral condition, the alveolar bone of mandible between first molars was defected and remained teeth were second molars, that was reconstructed by the titanium plate and skin graft. To solve his chief complaint, dento-maxillary prosthesis with the retainers on second molars was fabricated by the conventional method. However, the both segments(left-right) of mandible showed an abnormal movement as a fulcrum of the mandibule midline. Then custom-made attachment was added on the prosthesis to correspond the abnormal movement. Although a fracture of the custom-made attachment and loss of the second molar were encountered due to periodontal disease in the period of observation, denture repair could solve these problems.
    Discussion: In this case, we speculated that the negative influences of a muscle movement of mandibular segment and presence of a false joint on the center of mandible resulted in an abnormal mandiubular movement.
    Conclusion: The applied custom-made attachment enabled the prosthesis to be crooked flexibly in accordance with the eccentric mandibular movement.
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  • Kenji Tsuda
    2009Volume 1Issue 2 Pages 227-230
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 77-year-old male patient who was undergone hemi-maxillectomy including removal of the zygomatic bone, orbit and eyeball on his right side due to cancer. His chief complaint was to gain the stable orbital prosthesis at the first examination. The fabrication of an upper complete denture, a lower removal partial denture and an orbital prosthesis were planned for functional and esthetic rehabilitation. At first, intra-oral prostheses were fabricated, then, an orbital prosthesis was completed through the facial impression, sculpture, transfer the silicone material and coloration as following the conventional method.
    Discussion: It was confirmed that the oral function was improved with the hollow obturator on the upper jaw, while some problems for the orbital prosthesis such as the difficulty in daily handling have remained.
    Conclusion: In fabrication of maxillofacial prostheses, every clinical steps should be carefully done depending on rather complicated clinical conditions of individual patient.
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  • Nobuhiro Hasegawa
    2009Volume 1Issue 2 Pages 231-234
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 61 year old male who had suffered with severe periodontitis came to our clinic with masticatory and esthetic disorder. After the treatment denture was delivered and the patient obtained the occlusal relationship, his masticatory function and esthetics was recovered by prosthodontic treatment using upper and lower complete denture with magnetic attachments.
    Discussion: It is difficult for periodontally compromised teeth to resist to the occlusal force because of displacement or increased crown root ratio. Thus, it is effective for these patients to apply the denture with magnetic attachments because of support and retention and reduction of the lateral force to the remaining teeth of the denture.
    Conclusion: Hopeless teeth from a periodontal standpoint had been preserved and used as magnetic attachments for support and retention in upper and lower complete denture. The patient was followed for more than 4 years with no complications and he was very satisfied with mastication and esthetics.
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  • Yuji Kamashita
    2009Volume 1Issue 2 Pages 235-238
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 56-years-old female patient with temporomandibular disorder had her symptoms reduced by the treatment with manipulation and a disk-repositioning splint. After the maxillomandibular relationship was determined using reconstructed dentures, prosthodontic restoration with removable partial dentures made using a milling technique was carried out. Eight years later, because of the attrition of the artificial teeth, another set of dentures with metal teeth was needed. Apart from this, the treatment showed that good therapeutic results were maintained during 14 years.
    Discussion: The following factors were effective over a long-period for preventing a relapse of TMD; application of a milling technique that stabilized a removable partial denture and occlusion, the metal copings stabilized the dentures and the remaining roots, and the metal teeth maintained the occlusal relationship.
    Conclusion: Prosthodontic restoration with removable partial dentures produced using a milling technique is useful to stabilize dentures and to protect the temporomandibular joint.
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  • Yoko Hasegawa
    2009Volume 1Issue 2 Pages 239-242
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 66-year-old woman was referred to our department because of pain in maxilla incisors and esthetic dissatisfaction of maxilla and mandible partial dentures. Residual root was fractured and the dentures had repaired repeatedly by supplement prosthesis. The anterior artificial teeth of maxilla had an abnormal appearance, and their alignment was deviated to the lingual side.
    Discussion: Judging from extent of attrition and extrusion of residual teeth, and the facial appearance, diagnosis were infraclusion and irregularity in the occlusal plane. The occlusal vertical dimension and the facial appearance were restored using treatment dentures and provisional restoration. The final prosthesis, having occlusal support of residual teeth and an adequate occlusal vertical dimension determined from that of the treatment denture, was applied to the patient.
    Conclusion: Two years and five months after the final prosthesis appliication, the patient underwent extraction of 7 due to its extrusion and distoversion. The patient has had a good satisfaction thereafter.
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  • Shigeru Nomi
    2009Volume 1Issue 2 Pages 243-246
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 72-year-old male visited our hospital with a chief complaint of masticatory dysfunction. It was considered that the cause was the loss of occlusal support in molar areas from intra oral and extra oral examinations. So the masticatory dysfunction was rehabilitated by a removable partial denture with an increased vertical dimension.
    Discussion: First, the occlusal plane and the vertical dimension were modified by a removable partial denture which he has already used. Next, a temporary denture was fabricated with new occlusal plane and vertical dimension which was decided by the modified previous denture. He was observed by this temporary denture without problem. Finally a definitive denture was fabricated. Because of these steps, patient could get good masticatory efficiency and was satisfied with the new denture.
    Conclusion: A chief complaint regarding the masticatory efficiency has been solved and got high masticatory efficiency using a removable partial denture.
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  • Hiroaki Yanagida
    2009Volume 1Issue 2 Pages 247-250
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: The patient was a 62-year-old female complained of masticatory disturbance caused by maxillary and mandibular distal extension missing. The patient complained of discomfort of mandibular removable denture. To achieve the posterior occlusal support, the implant-supported fixed partial denture was selected for lower distal missing.
    Discussion: The posterior occlusion was reconstructed with the combination of fixed and removable prosthesis. Implant-supported fixed partial denture was useful for a patient claimed to discomfort of removable denture. No significant problem has occurred for three years after treatment.
    Conclusion: The patient was satisfied with the combination of maxillary removable partial denture and mandibular implant-supported fixed partial denture, and good functional results were obtained.
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  • Koji Suzuki
    2009Volume 1Issue 2 Pages 251-254
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 55-year-old female patient presented with the chief complaint of esthetic problem for the maxillary anterior tooth. An esthetic recovery was performed for the maxillary anterior tooth using the crown lengthening procedures and implant therapy was performed for the left mandibular free-end space to reestablish the proper occlusal support following bite raising.
    Discussion: Since medical intervention was performed by appropriate timing in this case, an esthetic recovery was performed and more tooth loss could be prevented.
    Conclusion: In this case, the patient was finalized by anterior esthetic prosthesis following bite raising and crown lengthening procedures. It was possible to avoid a partial denture that the patient did not like and to recover occlusal support by implant denture.
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  • Shintaro Hattori
    2009Volume 1Issue 2 Pages 255-258
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: The patient was a 68 year-old male with complaints of unpleasant feeling for the partial denture and wanted to improve the masticatory capacity. I planned to do implant rehabilitation to establish a positive occlusion. I established this implant rehabilitation with 7 implants for lower jaw, on the other hand we pulled some teeth out at the beginning of this treatment for upper jaw because it was poor prognosis, after that I treated it with 6 implants for upper jaw.
    Discussion: In this case, implant rehabilitation was effective to get a comfortable masticatory function just like natural teeth.
    Conclusion: We could establish a stable occlusion and more rigid support with this implant rehabilitation.
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  • Eri Makihara
    2009Volume 1Issue 2 Pages 259-262
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A 73-year-old male who has maxillary and facial skin defects. Dental magnetic attachmennt was applied as a retentive structure and connector between a removable partial denture and an obtulator, and an obtulator and a facial prosthese.
    Discussion: The new epithese was small and its adhesion was strong enough for the magnetic attachments without adhesive materials for his skin. The limitation of closing his lips was improved by changing the axis of the anterior teeth. His articulatory and masticatory function were improved after wearing the new prosthesis.
    Conclusion: This clinical report describes the fabrication method for a maxillofacial prosthesis by applying dental magnetic attachments for retention and connection. The evaluation of mastication and articulation was done before and after wearing the new prosthesis and his complaining was improved.
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  • Takeo Maida
    2009Volume 1Issue 2 Pages 263-266
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A-60-year-old female complained of discomfort of maxillary denture and esthetic dissatisfaction of mandibular denture. The treatment provided occlusal reconstruction with implant supported fixed prostheses for maxilla and implant assisted overdenture with magnetic attachment for mandible.
    Discussion: The implant prosthesis made fine outcome with no mobility and no morbid bone resorption around implants during periodical recall. The patient was very satisfied with function and esthetics by the implant treatment. Establishment of occulusal support by implants also presented stabilizing of existing teeth.
    Conclusion: The implant treatment effectively improved the patient's requirements for comfort and esthetics in partially edentulous maxilla and mandible.
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  • Yoshihiro Nakasato
    2009Volume 1Issue 2 Pages 267-270
    Published: 2009
    Released on J-STAGE: July 15, 2009
    JOURNAL FREE ACCESS
    Patient: A patient is a 49-year-old female who underwent a total glossectomy, mandibular segmentectomy and immediate reconstructive surgery due to a floor of the mouth carcinoma and a dento-maxillary prosthesis was placed to compensate the jaw defect.
    Discussion: During three years and five months postoperatively, the dento-maxillary prosthesis condition was good and the patient was very satisfied with the dento-maxillary prosthesis which restored lip-support and improved articulatory and swallowing functions. Frequent recalls were considered necessary to ensure maintenance of good oral care and of the dento-maxillary prosthesis.
    Conclusion: This is case involved the placement of a dento-maxillary prosthesis following total glossectomy. The prosthesis improved esthetics and function as well as the QOL of the patient.
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