In the case of single tooth replacement, a fixed prosthesis or a dental implant is the treatment option commonly selected as first choice. However, any amount of sound tooth structure should be removed to prepare the abutment teeth for full coverage retainer. The adjacent tooth damage can be avoided placing a dental implant. However, depending on the patient's oral condition and any other circumstances, it may be impossible or delayed. In this case resin bonded fixed partial denture was selected as an alternative that can restore single tooth loss without much tooth structure removal to the young patients and the patients with gingival recession. We report these patients were satisfied with esthetic and function.
Dental Implants ; Denture, Partial, Fixed ; Denture, Partial, Fixed, Resin-Bonded ; Gingival Recession ; Humans ; Prostheses and Implants* ; Tooth Loss ; Tooth*

PURPOSE: The purpose of this study is finding proper bonding agents to be used when adding bis-acryl composite provisional materials. MATERIALS AND METHODS: Three bonding agents with different chemical compositions were included in this study. Forty disk shaped specimens of bis-acryl composite provisional material were prepared and divided into 4 groups according to the bonding agents. Control group didn't have bonding agent. Through the Teflon mould with 4.0 mm diameter hole with 4.0 mm thickness the same bis-acryl composite provisional material was added on the disks after the surface of each specimen was treated with designated bonding agent according to the manufacturer's instructions. Shear bond test was performed and the fractured surfaces were inspected with a microscope. One-way analysis of variance was conducted and the result was further analysed with Turkey post hoc test at the significance level of 0.05. RESULTS: The highest strength was acquired from the specimens bonded with chemical cure system and it was statistically significant (P < 0.05). This group showed 100% cohesive failures. The lowest bonding strength was recorded from the specimens used conventional light cure bonding agent, and this group's result was similar with the control group. The group used a light cure bonding agent claiming improved compatibility revealed significantly higher bond strength to the traditional light cure bonding agent group in a statistically significant way (P = 0.043). CONCLUSION: According to the bonding agent used the shear bond strength was significantly affected. Therefore the choice of proper bonding agent is important when hiring a bonding agent to add bis-acryl composite provisional materials.
Polytetrafluoroethylene ; Turkey

Purpose: To compare the polishing characteristics and their influence on Candida albicans adhesion to the recently introduced polyetherketoneketone (PEKK) and the conventional polymethylmethacrylate (PMMA) denture resin material. Materials and methods: Specimens from PEKK (Group E) and PMMA (Group M) were made in dimensions of 8 mm in diameter and 2 mm in thickness. The specimens were further divided into sub-groups according to the extent of polishing (ER, MR: rough; EP, MP: polished, N = 12 each). The specimens were polished using polishing machine and SiC foil. ER and MR group specimens were polished with 600 grit SiC foil only. EP and MP groups were further polished with 800, 1,000, 1,200 grit SiC foils sequentially. To measure the surface roughness values (Sa) of specimens, atomic force microscope (AFM) was used and scanning electron microscope (SEM) observation under 1,000, and 20,000 magnifications was performed to investigate surface topography. The polished specimens were soaked in C. albicans suspension for 2 hours with shaking to promote adhesion. The attached C. albicans were detached from the surface with 10 times of pipetting. The suspension of detached C. albicans was performed by serial dilution to 103 times, and the diluted suspensions were inoculated on Sabouraud dextrose agar plates using spread plate method. After incubating the plate for 48 hours, colony forming unit (CFU)/plate of C. albicans was counted. Statistical analysis was performed using one-way ANOVA and Tukey HSD test to confirm significant difference between the groups (α=.05). Results: Average Sa value was significantly higher in MR group compared to other groups (P<.05), meaning that additional polishing steps reduced surface roughness effectively only in the PMMA specimens. There was no significant difference in Sa values between MP and EP groups. In SEM images, PEKK specimens showed numerous spikes of abraded material protruding from the surface and this phenomenon was more significant in EP group. The mean CFU/plate value was the highest in EP group and this was significant when it was compared to MP group (P<.05) which was the lowest. Conclusion Polishing PEKK using serial SiC abrasive foil may result in higher adhesion of C. albicans. In clinic, this should be considered carefully.

No abstract available.
Basal Cell Nevus Syndrome* ; Carcinoma, Basal Cell

In order to deliver fixed partial denture to a patient successfully, dentist must take into many considerations beforehand. Patient’s occlusal pattern should be fully understood before delivering any type of prosthesis, whether it’s canine guidance or group function occlusion. In order to do so, movement of mandible should be recorded precisely. Introduced by Meyers in 1933, functionally generated path technique (FGP) has been successfully used to record mandibular movement with various materials, such as wax, and utilize it in fabricating precise prosthesis. In the following cases, patients showed secondary caries or endodontic-periodontic lesion on maxillary molars. Root canal treatment and subgingival curettage were done for each patient. Since the long term prognosis of each tooth was questionable, lateral force should be minimized. In order to do so, FGP technique was used to record mandibular movements precisely. Instead of using conventional plaster impression, intra-oral scanning of wax tracing was done to fabricate prosthesis efficiently. After delivery of fixed partial denture, favorable outcome was obtained.

Purpose: The purpose of present study was to evaluate the effect of changing structural stability of wax disc on the fit of prosthesis when the milling proceeded in order. Materials and methods: Prepared maxillary left first molar was used to fabricate a Ni-Cr alloy reference model. This was scanned to design crown and then wax pattern was milled, invested and cast to fabricate prosthesis. The wax patterns located in a row centrally within a single wax disc were set into a total of five groups ranging from WM1 group that was first milled to WM5 group that was last milled and the number of each group was set as 10. Silicone replica technique was used to measure the marginal gap, axial internal gap, line angle internal gap, occlusal internal gap. Data was evaluated with one-way ANOVA with significance level set at α = .05 and then Tukey HSD test was conducted for post analysis. Results: Marginal gap measured in each group, it was 40.41 ± 2.15 µm in WM1group, 40.44 ± 2.23 µm in WM2 group, 39.96 ± 2.25 µm in WM3 group, 39.96 ± 2.48 µm in WM4 group, and 40.57 ± 2.53 µm in WM5 group. No significant difference was found between groups. The significant difference between the groups was also not found in the axial internal gap, line angle internal gap, and occlusal internal gap. Conclusion Internal and marginal fit of single crown to the sequential order of milling processing in the single machinable wax disc did not seem to be affected by the sequence.

This case report presents a closed hollow bulb obturator made by 3D printing for a maxillectomy patient. Final impression was taken according to the instructions and impression trays provided by the Magic denture™ system. Vertical dimension, facial appearance, and retention had been checked with the try-in denture. The try-in denture was corrected and adjusted to fulfill the demand of the patients, then these were reflected to the final design of the denture. The defect area was designed as a closed hollow bulb shape to reduce the weight and to provide uniform thickness of the denture. The patient satisfied with the esthetics and function of the denture.
Clothing ; Dentures ; Esthetics ; Humans ; Magic ; Printing, Three-Dimensional ; Rehabilitation ; Vertical Dimension

Archaeological research has mainly focused on stone tools, pottery, and metal relics excavated from ruins. Recently, interest in natural relics such as animal bones has increased, as these relics can provide insight into the eating habits, cultural level, and perception of animals of the people at that time. This study investigated morphological structures and dimensions of Nyctereutes procyonoides bones excavated from a well at the Gasan-ri archaeological site in Jinju. These bones are presumed to be relics from the Three Kingdoms period. A total of 447 animal bones were excavated, of which 59 (13.2%) were identified as N. procyonoides bones. These identified bones weighed 47.14 g, accounting for 4.83% of the total bone weight (975.30 g). These N. procyonoides bones were found to belong to 2 individuals estimated to be 5 to 6 weeks old. These bones included 5 skull fragments, 2 mandibles, 9 vertebrae, 11 ribs, 10 forelimb bones, 3 hip bones, and 19 hindlimb bones. A fracture was observed near the bregma of one skull. The presence of a complete specimen in the well suggested that it was used in animal sacrifice rituals. This study estimated the value of animals and human dietary culture at that time by utilizing N. procyonoides bones presumed to be relics of the Three Kingdoms period.

In cases where a palatal defect resulting from oral cancer surgery is reconstructed using a free flap, dentures placed on the grafted site, lacking bone support, may experience stability problems due to insufficient support. This case report presents a 41-year-old male patient who underwent a sinus resection due to maxillary sinus carcinoma. The defect was reconstructed using a lateral thigh free flap.After a three-month interim prosthesis phase, a conventional removable partial denture was fabricated. Considering the condition of the remaining teeth and the patient’s age, natural tooth alteration was performed and lingual undercuts of the right posterior teeth were incorporated into the design to compensate for the lack of bone support. Digital occlusal analysis devices and 3D facial scanning were utilized to evaluate changes in occlusion and facial form, and the visualized results were presented to the patient to enhance understanding.

Archaeological research has mainly focused on stone tools, pottery, and metal relics excavated from ruins. Recently, interest in natural relics such as animal bones has increased, as these relics can provide insight into the eating habits, cultural level, and perception of animals of the people at that time. This study investigated morphological structures and dimensions of Nyctereutes procyonoides bones excavated from a well at the Gasan-ri archaeological site in Jinju. These bones are presumed to be relics from the Three Kingdoms period. A total of 447 animal bones were excavated, of which 59 (13.2%) were identified as N. procyonoides bones. These identified bones weighed 47.14 g, accounting for 4.83% of the total bone weight (975.30 g). These N. procyonoides bones were found to belong to 2 individuals estimated to be 5 to 6 weeks old. These bones included 5 skull fragments, 2 mandibles, 9 vertebrae, 11 ribs, 10 forelimb bones, 3 hip bones, and 19 hindlimb bones. A fracture was observed near the bregma of one skull. The presence of a complete specimen in the well suggested that it was used in animal sacrifice rituals. This study estimated the value of animals and human dietary culture at that time by utilizing N. procyonoides bones presumed to be relics of the Three Kingdoms period.