1.Strategic serial extractions and immediate implantation for interdental papilla preservation: A case report.
Geun Bae CHOI ; Jung Jin LEE ; Seung Geun AHN ; Jae Min SEO
The Journal of Korean Academy of Prosthodontics 2017;55(3):286-291
Maintaining the blood supply of the interdental alveolar bone is crucial for preserving the interdental papilla. Rebuilding the interimplant papilla between adjacent implants is more difficult than rebuilding the interdental papilla between the natural tooth and implant. Therefore, preserving the interimplant tissue is necessary when adjacent implants are closely placed. In this case report, three effective methods for maintaining the surrounding tissue, namely strategic serial extraction, immediate implantation, and provisionalization of adjacent maxillary central incisors, were performed. The marginal gingiva and interimplant papilla were well maintained for 24 months.
Gingiva*
;
Incisor
;
Serial Extraction*
;
Tooth
2.Effect of impression coping and implant angulation on the accuracy of implant impressions: an in vitro study.
Si Hoon JO ; Kyoung Il KIM ; Jae Min SEO ; Kwang Yeob SONG ; Ju Mi PARK ; Seung Geun AHN
The Journal of Advanced Prosthodontics 2010;2(4):128-133
PURPOSE: The purpose of this study was to compare the accuracy of the implant master cast according to the type (pick-up, transfer) and the length (long, short) of the impression copings. MATERIALS AND METHODS: The metal master cast was fabricated with three internal connection type implant analogs (Osstem GS III analog), embedded parallel and with 10degrees of mesial angulation to the center analog. Four types of impression coping were prepared with different combinations of types (transfer, pick-up) and lengths (long, short) of the coping. The impressions were made using vinyl polysiloxane (one step, heavy + light body) with an individual tray, and 10 impressions were made for each group. Eventually, 40 experimental casts were produced. Then, the difference in the distance between the master cast and the experimental cast were measured, and the error rate was determined. The analysis of variance was performed using the SPSS (v 12.0) program (alpha = .05), and the statistical significance was set at P < .05. RESULTS: The ANOVA showed that the pick-up type impression coping exhibited a significantly lower error rate than the transfer type. However, no significant difference was observed with respect to the length of the impression coping. Additionally, no significant difference was observed between the parallel and mesial angulated groups. CONCLUSION: Within the limitations of this study, the pick-up type impression coping exhibited a more accurate implant master cast than the transfer type in parallel group. The accuracy of the implant master cast did not differ for different lengths of impression coping of at least 11 mm. Additionally, the accuracy of the implant cast was not different for the parallel and 10degrees mesial angulated groups.
Light
;
Polyvinyls
;
Siloxanes
3.Effects of hydrofluoric acid concentration and etching time on the shear bond strength between lithium disilicate ceramic and resin cement.
Jae Min SEO ; Charn Woon PARK ; Seung Geun AHN
The Journal of Korean Academy of Prosthodontics 2007;45(4):407-418
PURPOSE: The objective of this study was to evaluate the effects of hydrofluoric acid concentration & etching time on the shear bond strength between IPS Empress 2 ceramic and resin cement. MATERIAL AND METHODS: Thirty three rectangular shape ceramic specimens(20x12x5mm size, IPS Empress 2 core materials) were used for this study. The ceramic specimens divided into ten experimental groups with three specimens in each group and were etched with hydrofluoric acid(4%, 9%) according to different etching times(30s, 60s, 90s, 120s, 180s). Etched surfaces of ceramic specimens were bonded with resin cement(Rely X Unicem) using acrylic glass tube. All cemented specimens were tested under shear loading until fracture on universal testing machine at a crosshead speed of 0.5mm/min and the maximum load at fracture(kg) was recorded. Collected shear bond strength data were analyzed with one way ANOVA and Duncan tests. All etched ceramic surfaces were examined morphologically using SEM(scanning electron microscopy). RESULTS: Shear bond strength of etching group(35.89~68.01 MPa) had four to seven times greater than no-etching group(9.53+/-2.29 MPa). The ceramic specimen etched with 4% hydrofluoric acid for 60s showed the maximum shear bond strength(68.01+/-11.78 MPa). Ceramic surface etched with 4% hydrofluoric acid for 60s showed most retentive surface texture. CONCLUSION: It is considered that 60s etching with 4% hydrofluoric acid is optimal etching methods for IPS Empress 2 ceramic bonding.
Ceramics*
;
Glass
;
Hydrofluoric Acid*
;
Lithium*
;
Resin Cements*
4.Fabrication of a metal-ceramic crown to fit an existing partial removable dental prosthesis using ceramic pressed to metal technique: a clinical report.
The Journal of Advanced Prosthodontics 2014;6(3):241-244
Fabricating a crown to retrofit an existing abutment tooth for a partial removable dental prosthesis (PRDP) is one of the most time-consuming and labor-intensive clinical procedures. In particular, when the patient is concerned with esthetic aspects of restoration, the task of fabricating becomes more daunting. Many techniques for the fabrication of all-metallic or metal-ceramic crowns have been discussed in the literature. This article was aimed to describe a simple fabrication method in which a retrofitting crown was fabricated for a precise fit using a ceramic-pressed-to-metal system.
Ceramics*
;
Crowns*
;
Dental Prosthesis*
;
Humans
;
Tooth
5.Hepatocellular Carcinoma in Primary Biliary Cirrhosis: A Case Report.
Jae Seung LEE ; Kyung Deog SEO ; Dae Hwan KANG ; Geun Am SONG ; Mong CHO ; Ung Suk YANG
The Korean Journal of Hepatology 2000;6(4):519-523
We report a case of a 50 year-old woman with hepatocellular carcinoma which developed in primary biliary cirrhosis. During follow-up primary biliary cirrhosis, elevation of alpha-fetoprotein was noted. CT and hepatic arteriogram revealed a hypervascular nodule of approkimately 1.5 cm in size in the right posterior inferior segment of liver. Transcatheter hepatic artery chemoembolization was performed. To the author,s knowledge, this is the first case of hepatocellular carcinoma developed in a patient with primary biliary cirrhosis in Korea.
alpha-Fetoproteins
;
Carcinoma, Hepatocellular*
;
Female
;
Follow-Up Studies
;
Hepatic Artery
;
Humans
;
Korea
;
Liver
;
Liver Cirrhosis, Biliary*
;
Middle Aged
6.A human case of ectopic fascioliasis in Korea.
Soon Hyung LEE ; Seung Yull CHO ; Byong Seol SEO ; Kuck Jin CHOE ; Je Geun CHI
The Korean Journal of Parasitology 1982;20(2):191-200
A case of ectopic fascioliasis involving cecum and ascending colon was reported. This case was a 19-year old Korean female who had a history of postprandial aggravation of intermittent abdominal pain of 3 weeks duration. She was presented with an abdominal mass in the right upper quadrant, for which an operation(right hemicolectomy) was performed. Whole cecum and ascending colon showed multifocal tunnel-like necrotizing granulmas with central cavitations. Numerous Charcot-Leyden crystals were seen along tracts of the worm. The lesion was distributed throughout the entire thickness of the wall. Parasitological examination confirmed the worm found in the intestinal wall to be juvenile form of Fasciola species. Possibilities were discussed on the localization of the fluke and the mode of infection of present case.
parasitology-helminth-trematoda
;
Fasciola sp.
;
fascioliasis
;
case report
;
cecum
;
colon
;
granuloma
7.A Case of Oligodendroglioma in the Septum Pellucidum.
Kang IL LEE ; Ki Won SUNG ; Seung Geun SEO ; Jong Oh LEE ; Dae Whan KIM ; Jong Chul LEE
Journal of Korean Neurosurgical Society 1988;17(1):149-154
The authors report a case of oligodendroglioma in the septum pellucidum. A 22-year-old male presented with symptoms of headache and decreased visual acuity. Simple skull series showed calcified density near the midline. Brain C-T scan revealed huge calcified mass involving right lateral ventricle, 3rd ventricle and obstructive hydrocephalus. The authors diagnosed oligodendroglioma in operative findings and pathologic examination.
Brain
;
Headache
;
Humans
;
Hydrocephalus
;
Lateral Ventricles
;
Male
;
Oligodendroglioma*
;
Septum Pellucidum*
;
Skull
;
Visual Acuity
;
Young Adult
8.Immediate placement and functional loading of implants on canine with fixed partial denture for a patient having canine protected occlusion: a case report.
Jun Won HONG ; Seung Geun AHN ; Dae Ho LEEM ; Jae Min SEO
The Journal of Advanced Prosthodontics 2012;4(1):52-56
Conventional implant protocols required a load-free healing period of three to six months between placement and functional loading of the implants. Many efforts have been made to minimize the duration of treatment time. Several literatures have documented immediate function with provisional or definitive prosthesis within a week of the placement in response to these demands. In addition, immediate implant placement has advantages such as shortened treatment time and preservation of soft tissue architectures. This article presents immediate implant placement into fresh extraction sockets followed by functional immediate loading with provisional prosthesis on canine and premolars for a patient having canine protected occlusion.
Bicuspid
;
Dental Occlusion
;
Denture, Partial, Fixed
;
Humans
;
Prostheses and Implants
9.Immediate placement and functional loading of implants on canine with fixed partial denture for a patient having canine protected occlusion: a case report.
Jun Won HONG ; Seung Geun AHN ; Dae Ho LEEM ; Jae Min SEO
The Journal of Advanced Prosthodontics 2012;4(1):52-56
Conventional implant protocols required a load-free healing period of three to six months between placement and functional loading of the implants. Many efforts have been made to minimize the duration of treatment time. Several literatures have documented immediate function with provisional or definitive prosthesis within a week of the placement in response to these demands. In addition, immediate implant placement has advantages such as shortened treatment time and preservation of soft tissue architectures. This article presents immediate implant placement into fresh extraction sockets followed by functional immediate loading with provisional prosthesis on canine and premolars for a patient having canine protected occlusion.
Bicuspid
;
Dental Occlusion
;
Denture, Partial, Fixed
;
Humans
;
Prostheses and Implants
10.Acoustical Effects of Short-Term Endotracheal Intubation.
Soon Yuhl NAM ; Sung Geun BONG ; Young Il SEO ; Hwa Kyung YU ; Seung Joo YOO
Korean Journal of Otolaryngology - Head and Neck Surgery 1999;42(10):1295-1299
Background and Objective: Patients often complain of transient hoarseness and dysphagia after undergoing procedures requiring endotracheal intubation. Transient voice changes associated with endotracheal intubation are generally assumed to be a result of vocal fold trauma. This study was designed to characterise vocal changes aftershort-term endotracheal anesthesia using acoustic analysis for monitoring the presence of and recovery from intubation trauma. MATERIAL AND METHODS: Vocal functions of 25 patients undergoing chronic ear surgeries using general anesthesia with endotracheal intubation were analyzed preoperatively and postoperatively. Fundamental frequency, jitter, shimmer, noise to harmonic ratio were measured to assess vocal function. RESULTS: In male, fundamental frequency, jitter, shimmer, noise toharmonic ratio did not differ significantly across recording sessions, although certain predictable trends were apparent. In female, statistically significant decrement in fundamental frequency and increment in jitter and shimmer were found postoperatively (p<0.05). One day after extubation, these change were return to preoperative values. CONCLUSION: Even short-term endotracheal intubation affects acoustic-characteristics of voice and acoustic analysis are sensitive to identify and monitor minor laryngeal trauma due to endotracheal intubation.
Acoustics
;
Anesthesia
;
Anesthesia, General
;
Deglutition Disorders
;
Ear
;
Female
;
Hoarseness
;
Humans
;
Intubation
;
Intubation, Intratracheal*
;
Male
;
Noise
;
Vocal Cords
;
Voice