This study was performed to investigate the effects of tooth mobility and design of the direct retainer on the stress of supporting tissues in distal extension removable partial denture. Tooth mobility was simulated and four different types of direct retainer such as Akers clasp, I-bar clasp, wrought wire, and Dalbo attachment were designed and stress o the supporting tissues were measured and analyzed with straingauge method. The following conclusions were drawn from this study. 1. The stress revealed at the lingual side of alveolar bone of the abutment tooth in edentulous area was the largest. 2. The stress at the lingual side of alveolar bone of the abutment tooth in edentulous area was increased according to the increases of tooth mobility in I-bar clasp and Dalbo attachment. 3. The stress at the residual ridge crest was the great in Dalbo attachment on mobility 0, in I-bar clasp on mobility 1, and in wrought wire clasp on mobility 2. 4. There was little changes of stress according to the increase of tooth mobility at buccal and lingual side of the residual ridge crest and around the abutment teeth in dentulous area.
Denture, Partial, Removable* ; Tooth Mobility* ; Tooth*

The bond failure of resin teeth to denture base resin is one of the failure in prosthodontic treatment. The purpose of this study was to evaluate the bond strength of artificial resin teeth to the denture base resins. Specimens were made with heat curing acrylic resins (Vertex Rs, Lucitone 199) and artificial resin teeth (Tiger, Trubyte biotone, Endura, Orthosit, Trubyte bioform IPN) and the bond strength were measured with testing machine (Zwick, Germany) and the mode of bond failure were observed. The results were as follows; 1. The bond strength of Vertex Rs to artificial resin teeth was the highest in Trubyte biotone, and It was the lowest in Tiger and Trubyte bioform IPN 2. The bond strength of Lucitone 199 to artificial resin teeth were higher in Orthosit and Trubyte bioform IPN than in Tiger and Trubyte biotone. 3. The bond strength of Trubyte biotone to Vertex Rs was higher than to Lucitone 199 and that of the Trubyte bioform IPN to Lucitone 199 was higher than to Vertex Rs. 4. Nearly all bond failures of specimens occured cohesively within the resin teeth.
Acrylic Resins ; Denture Bases* ; Dentures* ; Hot Temperature ; Prosthodontics ; Tigers ; Tooth*

This study was performed to investigate the distribution and magnitude of stress at supporting tissue of abutment teeth and residual ridge tissue with remaining unilateral posterior teeth. Four types of removable partial dentures that included clasp retained removable partial denture, attachment retained removable partial denture, telescopic removable partial denture, and swing-lock partial denture were designed, and strain gauge was used for stress analysis. Each prosthesis was subjected to simulated vertical and oblique load. The following conclusions were drawn from this study. 1. The clasp retained removable partial denture generally distributed simulated vertical force more evenly to the supporting structure. 2. The stress at buccal side of 1st premolar was the lowest in swing-lock partial denture and that was highest in attchment retained removable partial denture. The stress at lingual side of 1st premolar was the lowest in telescopic partial denture. 3. In clasp retained removable partial denture, stress was lower at load site and ridge crest at midline, but it was higher at lst premolar area on vertical load. 4. In attachment removable partial denture, stresses at buccal side of 1st premolar, lingual side of 1st premolar on vertical load, and ridge crest at midline on oblique load were higher. 5. In telescopic removable partial denture, stress at lingual side of 1st premolar was the least in all removable partial dentures, but the stress at load site was higher. 6. In swing-lock removable partial denture, stress at buccal side of 1st premolar was the lowest, and stresses at load site and distal end of residual ridge crest were higher.
Bicuspid ; Denture Design* ; Denture, Partial ; Denture, Partial, Removable ; Dentures* ; Prostheses and Implants ; Tooth*

No abstract available.
Adhesives* ; Crowns* ; Resin Cements*

No abstract available.
Carcinoma, Squamous Cell* ; Cervix Uteri* ; Female ; Humans ; Biomarkers, Tumor*

No abstract available.

The purpose of this study was to establish the role of apoptosis in the developing renal corpuscle in the prenatal rat kidney. Kidneys from 14-, 16-, 18-, and 20-day-old fetuses[E-14, E-16, E-18, and E-20] were preserved by immersion or perfusion via the heart using Bouin`s fixative. Apoptosis was detected`by in situ nick end labeling method using ApopTag kit. In kidneys from E-14, apoptotic cells and bodies were found only in the mesenchymal tissue surrounding the developing nephrons. In kidneys from E-16, E-18, and E-20, apoptotic cells and bodies were located mainly in the columnar distal epithelium of the renal vesicle[future parietal epithelium] as well as in the parietal epithelium of the renal corpuscles of S-shaped bodies, stage III and IV nephrons. Apoptosis was not observed in the proximal part of renal vesicles or in the podocytes in renal corpuscles. In contrast, strong bel-2 immunoreactivity was present in the proximal part of the renal vesicle and in podocytes in S-shaped bodies, but gradually decreased in stage III and IV nephrons. The distal part of the renal vesicle had weak staining for bcl-2, and there was no bel-2 immunoreactivity in the parietal epithelium of S-shaped bodies, and stage III and IV nephrons. We conclude that bcl-2 is involved in the regulation of apoptosis during the differen-tiation of the parietal epithelium of Bowmann`s capsule.
Animals ; Apoptosis* ; Epithelium* ; Heart ; Immersion ; In Situ Nick-End Labeling ; Kidney* ; Nephrons ; Perfusion ; Podocytes ; Rabeprazole* ; Rats*

No abstract available.
Androgen-Insensitivity Syndrome* ; Male

No abstract available.
Androgen-Insensitivity Syndrome* ; Male

No abstract available.
Thrombocytosis*