Influence of abutment materials on the implant-abutment joint stability in internal conical connection type implant systems

PURPOSE: This study evaluated the influence of abutment materials on the stability of the implant-abutment joint in internal conical connection type implant systems. MATERIALS AND METHODS: Internal conical connection type implants, cement-retained abutments, and tungsten carbide-coated abutment screws were used. The abutments were fabricated with commercially pure grade 3 titanium (group T3), commercially pure grade 4 titanium (group T4), or Ti-6Al-4V (group TA) (n=5, each). In order to assess the amount of settlement after abutment fixation, a 30-Ncm tightening torque was applied, then the change in length before and after tightening the abutment screw was measured, and the preload exerted was recorded. The compressive bending strength was measured under the ISO14801 conditions. In order to determine whether there were significant changes in settlement, preload, and compressive bending strength before and after abutment fixation depending on abutment materials, one-way ANOVA and Tukey's HSD post-hoc test was performed. RESULTS: Group TA exhibited the smallest mean change in the combined length of the implant and abutment before and after fixation, and no difference was observed between groups T3 and T4 (P>.05). Group TA exhibited the highest preload and compressive bending strength values, followed by T4, then T3 (P<.001). CONCLUSION: The abutment material can influence the stability of the interface in internal conical connection type implant systems. The strength of the abutment material was inversely correlated with settlement, and positively correlated with compressive bending strength. Preload was inversely proportional to the frictional coefficient of the abutment material.

Diagnostic Value of Polymerase Chain Reaction in Patients with Chronic Pelvic Pain Syndrome: using Semen as a Specimen / 대한비뇨기과학회지

PURPOSE: Specific microorganisms, such as Chlamydia and Mycoplasma, are rarely detected in chronic pelvic pain syndrome, but fastidious and non-culturable microorganisms may be important in its etiology. The objective of this study was to evaluate the usefulness and significance of polymerase chain reaction (PCR) in the diagnosis of the etiologies of chronic pelvic pain syndrome, especially using semen as a specimen. MATERIALS AND METHODS: Between August 2005 and July 2006, 237 patients, with a mean age of 39 years (range 25-67 years), were evaluated for chronic pelvic pain syndrome. PCR testing of the semen was performed in all cases to establish the persistence of C. trachomatis, T. vaginalis, M. hominis, M. genitalium and U. urealyticum. RESULTS: Of the 237 patients, 79 (33.3%) and 158 (66.7%) were categories IIIa and IIIb, respectively. On PCR, using semen, 18 (22.8%) of the 79 category IIIa and 26 (16.5%) of the 158 category IIIb cases were found to have positive PCRs for the causative microorganisms of CPPS. In a total of 53 isolates presenting positive PCR, the common causative microorganisms were U. urealyticum, C. trachomatis, M. genitalium, T. vaginalis and M. hominis in 23 (43.4%), 16 (30.1%), 11 (20.8%), 2 (3.8%) and 1 case (1.9%), respectively. CONCLISIONS: PCR is revolutionizing the diagnosis of many infectious diseases, particularly those caused by microorganisms that are difficult to cultivate. Moreover, PCR shows nearly 100% accuracy in terms of sensitivity and specificity. PCR using semen, which can detect various microorganisms suggestive of the etiologies of chronic pelvic pain syndrome, is expected to play an important role in the diagnosis, treatment and follow up of chronic pelvic pain syndrome in urology.

Adenocarcinoma Arising in Augmented Bladder / 대한비뇨기과학회지

Adenocarcinoma arising in an augmented bladder is a relative rare neoplasm. We report here on 2 cases of adenocarcinoma that developed in augmented bladders 23 and 30 years after ileocystoplasty, and both tumors were associated with contracted bladder due to tuberculosis. We also reviewed the literatures related to neoplasms occurring after urinary diversion procedures.

Abscess of the Penile Corpus Cavernosum / 대한비뇨기과학회지

We present an unusual case of a penile cavernosal abscess. This patient did not improve clinically despite repeat percutaneous aspiration of the abscess and administration of oral fluoroquinolone. Surgical drainage was required. Culture of pus and infected tissues were negative. Three months postoperatively, penile deviation to the left side and erectile dysfunction occurred but the patient was able to have sexual intercourse by using the medication of oral vardenafil. Colchicine was administered orally to the patient for 9 months and the penile curvature was improved.

Adenomatoid Tumor of the Tunica Vaginalis Testis / 대한비뇨기과학회지

Adenomatoid tumors arising in the tunica vaginalis are relative rare neoplasms, and usually benign in nature. An appropriate treatment of an adenomatoid tumor is local excision. Herein, a case of an adenomatoid tumor of the tunica vaginalis, in a 40-year-old man, is described. An orchiectomy was performed to excise the mass, and pathologic evaluation revealed an adenomatoid tumor of the tunica vaginalis.

Adenomatoid Tumor of the Tunica Vaginalis Testis / 대한비뇨기과학회지

Adenomatoid tumors arising in the tunica vaginalis are relative rare neoplasms, and usually benign in nature. An appropriate treatment of an adenomatoid tumor is local excision. Herein, a case of an adenomatoid tumor of the tunica vaginalis, in a 40-year-old man, is described. An orchiectomy was performed to excise the mass, and pathologic evaluation revealed an adenomatoid tumor of the tunica vaginalis.

Radiologic Findings of Primary Epiploic Appendagitis: Focused on the Ultrasonographic Findings

PURPOSE: The purpose of this study was to analyze the radiologic findings of primary epiploic appendagitis, with particular attention to the correlation of ultrasonographic, clinical, CT, MR and surgical findings. MATERIALS AND METHODS: Among 14 patients with primary epiploic appendagitis who presented with the rapid onset of a very localized pain and tenderness, we performed ultrasonography in all, CT in eight, and MRI in four of these eight. Surgery was performed in two patients. Follow-up examinations were performed using US, CT and MRI (n=2), US and CT (n=2), US alone (n=2), and with regard to clinical features (n=12). RESULTS: US performed in 14 patients revealed the presence in all of small, well-defined, ovoid, noncompressible hyperechoic (n=12) or isoechoic (n=2) solid masses attached to the colonic wall, without bowel wall change and without communication with bowel lumen. CT performed in 8 patients showed varying hyperattenuating fatty lesions in the same location in the abdomen, without other inflammatory process. MRI findings of four patients were helpful for further evaluation of internal architecture. CONCLUSION: In primary epiploic appendagitis, US findings were sufficiently characteristic to allow accurate diagnosis and valuable for the differential diagnosis of other acute conditions of the abdomen.

MR Imaging of Tibial Plateau Fractures: Evaluation of Fracture Types and Associated Soft Tissue Injuries

PURPOSE: To evaluate the usefulness of magnetic resonance imaging (MRI) for assessing fracture types and soft tissue injuries associated with tibial plateau fractures. MATERIALS AND METHODS: MRI was performed in 38 patients with tibial plateau fractures, each of which was classified according to the Schatzker system. We evaluated MR images and assessed the prevalence of each fracture type and accompanying soft tissue injuries. We also assessed whether ligamentous injury correlated with the extent of articular depression, splitting, and comminution. In 24 patients, diagnosis was based on MRI and operative or arthroscopic findings, and in 14 patients, on MRI alone. RESULTS: The totals of fracture types I, II, III, IV, V and VI were 4 (11 %), 15 (39 %), 6 (16 %), 4 (11 %), 4 (11%), and 5 cases (13 %), respectively. In 30 cases (79 %), there were associated ligamentous or meniscal injuries. Medial collateral ligaments and lateral menisci were injured in 17 (45 %) and 14 cases (37 %), respectively. Type II and IV fracture patterns were associated with soft tissue injuries in 14 of 15 cases (93 %) and 4 of 4 cases(100 %), respectively. As the extent of articular depression increased and the extent of bony comminution decreased, there was an increased prevalence of accompanying ligamentous injuries. CONCLUSION: In tibial plateau fractures, MR imaging is a useful diagnostic modality for the evaluation of both fracture type and accompanying ligamentous or meniscal injuries.

Abnormal Uterine Bleeding Due to Vascular Abnormality Caused by D&E : Doppler Sonography for Diagnosis and Transcatheter Arterial Embolization for Treatment

PURPOSE: We attempted to evaluate the usefulness of Doppler sonography in the diagnosis of uterine vascular abnormality caused by previous D&E, and to report that transarterial embolization is an exceelent treatment modality. MATERIALS & METHODS: We analyzed gray-scale US, color/duplex Doppler US and angiographic findings inseven patients with radiologically proven uterine vascular abnormality. Two of the seven cases were pseudoaneurysms and five of the seven cases were AVMs. In one of the AVMs, two small pseudoaneurysms were combined. In all cases, transarterial embolizations using 3mm coil or/and gelfoam particles were performed. Follow-up US studies, including color Doppler US, were performed. RESULTS: On color/duplex Doppler sonography, two cases of pseudoaneurysm showed blood pools with turbulent arterial flow, and five cases of AVM showed asymmetrically increased vascularity, with variable high velocities composed of the pulsatie arterial flow, with ahigh diastoic component. On angiography, the former showed pseudoaneurysmal sacs, and the latter densely opacified vascular tangles. No more abnormal uterine bleeding was shown, following transarterial embolization in all cases. CONCLUSION: Color/duplex Doppler sonography was valuable in the diagnosis or treatment of abnormal uterine bleeding caused by uterine vascular abnormality such as acquired AVM or pseudoaneurysm.