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민정범 ( Jeong Bum Min ),백신영 ( Shin Young Baek ),이현아 ( Hyun A Lee ),황호길 ( Ho Keel Hwang ) 조선대학교 치의학연구원 2011 Oral Biology Research (Oral Biol Res) Vol.35 No.1
Cracked tooth syndrome including discomfort during mastication, unexplained cold sensitivity, and pain on release of pressure is incomplete fracture of the tooth. The aim of this study was to show the incidence and treatment modality of the cracked tooth in Korea. We have analyzed the incidence and treatment modality of the cracked tooth. 153 cases in our hospital were analyzed according to gender, location, and treatment modality for 2 years. Molar teeth appeared to be the most commonly involved teeth by cracked condition. Cracked tooth syndrome affected adult patients, in the age range of 30 to 60 years. Most cracked teeth were treated by invasive methods such as crown restoration, root canal treatment, and extraction. These clinical points show that diagnosis and treatment in early stage of cracked tooth syndrome are very important. The improvement in the understanding of cracked tooth syndrome must be preceded for effective treatment.
손희석 ( Hee Seok Son ),민정범 ( Jeong Bum Min ),황호길 ( Ho Keel Hwang ) 조선대학교 치의학연구원 2010 Oral Biology Research (Oral Biol Res) Vol.34 No.1
Purpose: to investigate the types of distal canal in mandibular 1st molars and evaluate the proportion of root canal types in Korean population. Materials and Methods: The radiographs and clinical records of the distal root canals in the mandibular 1st molars that had been treated endodontically in the Chosun University Dental Hospital from 2005 to 2008 were reviewed and categorized. A total of 1423 cases were investigated in this study. The findings were then recorded and tabulated according to the Weine`s classification of root canal types. In addition, we investigated the relative incidences of root canal types with the variables according to patient`s gender and tooth location whether the tooth is right or left. And the results were statistically analyzed using x2 test using Sigmastat 3.5 with p value of 0.05. Result: 1. The most common type of distal root canal of mandibular 1st molar is type III (p<0.05). 2. There was no correlation between distal canal type of mandibular 1st molars and patient`s gender. 3. There was correlation between distal canal type of right mandibular 1st molar and left one (p<0.05). 4. There was high frequency of bilateral coincidence in same patient who was done root canal treatment both mandibular 1st molars. In conclusion, the incidence of type III is more higher than type I and II of the distal root canal type of mandibular 1st molar in Korean population. We must be confirm the presence of the disto-lingual root of the mandibular 1st molar using a standard radiograph during root canal treatment.
성건화(Kun-Hwa Sung),민정범(Jeong-Bum Min),박태영(Tae-Young Park) 대한치과의사협회 2020 대한치과의사협회지 Vol.58 No.8
Objectives: Management of a horizontal root fracture of an anterior teeth is challenging and often requires multiple approaches for improving the functional and esthetic outcomes. This case report describes the treatment and 2-yr follow up of 3 maxillary incisors with horizontal root fracture. Two maxillary central incisors were treated with Mineral Trioxide Aggregate (ProRoot MTA, Dentsply, Tulsa, OK, USA). Left maxillary lateral incisors were treated with endodontic treatment and submerged. During 2-yr of follow-up evaluation, the root-fractured teeth of the present patients were well retained in the arch, showing periodontal healing even after endodontic treatment.
생체막 제거 방법에 따른 비우식성 치경부 병소의 미세인장강도 비교
성건화(Kun-Hwa Sung),민정범(Jeong-Bum Min),박태영(Tae-Young Park) 대한치과의사협회 2020 대한치과의사협회지 Vol.58 No.11
Dentin surface of non-carious lesion is usually attached with oral biofilm. The biofilm should be removed before application of restorative material, because it may reduce the bond strength of adhesive system. The aim of this study was to evaluate the microtensile bond strength, when the biofilm was removed with brush or bur. Twenty extracted human third molars were sectioned horizontally to obtain dentin surface. Specimen were divided randomly into four group. Biofilm formation was performed in three group, except for Group 1 (negative control). Biofilm was removed as follows: Group 3, using ICB brush; Group 4, using lowspeed round bur #2. Group 2 (positive control) was not removed Biofilm. And in all four groups, the adhesive system (Optibond FL, Kerr) was applied to etched dentin surface, and resin composite was built up in three 1mm increments. After 24 hour storage in distilled water, the teeth were perpendicularly sectioned to obtain beams (1 x 1 mm2). Microtensile bond strength was measured and the data were statistically analyzed using one-way ANOVA and Tukey’s post hoc test (p<0.05). Group 4 showed the highest microtensile bond strength (p<0.05), Group 3 showed no significant improvements when compared to Group 1. Group 2 showed lowest microtensile bond strength (p<0.05). When restoring a non-carious cervical lesion, it is essential to remove the biofilm present on the dentin surface. In addition, in the method of removing the biofilm, both the brush removal method and the bur removal method were effective.