https://oak.chosun.ac.kr/handle/2020.oak/18287 Thu, 28 Aug 2025 14:01:21 GMT 2025-08-28T14:01:21Z https://oak.chosun.ac.kr/handle/2020.oak/19115 Title: Prognosis of implants placed simultaneously with periodontal surgery of the adjacent tooth Author(s): Han-chang Yu; Young-kyun Kim Abstract: This study examined the effects of periodontal disease on implants placed simultaneously with adjacent periodontal surgery through an evaluation of the survival rate, success rate, and marginal bone loss of the implants. In total, 11 implants were placed in nine patients. Regenerative surgery including guided tissue regeneration was performed in eight patients. Resective flap curettage (open flap debridement) was performed in three patients. Seven of the eleven teeth that underwent periodontal surgery were extracted, and the remaining four survived for an average of 6 years and 6 months during follow-up. Two implants failed during the follow-up period. Except the two failed implants, the mean survival period was 94 months and the success and survival rates were 90.9% each. Moreover, the mean marginal bone loss of the survived implants was 0.14 mm. The prognosis of implants placed simultaneously with periodontal surgery of the adjacent natural teeth with periodontitis is reasonable. Tue, 31 Dec 2019 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/19115 2019-12-31T15:00:00Z https://oak.chosun.ac.kr/handle/2020.oak/19116 Title: Closure of an oroantral fistula with a bone fragment during surgical extraction of an impacted maxillary second premolar: A case report Author(s): You-song Sim; Seunggon Jung; Hong-ju Park; Min-suk Kook Abstract: Maxillary sinus membrane perforation commonly occurs during extraction, mostly during an impacted tooth extraction. If left untreated, maxillary sinus perforation can cause several complications. Here, we describe a closure technique of an oroantral fistula using a bone fragment. During the extraction of an impacted maxillary second premolar, the tooth fell into the maxillary sinus. The tooth was removed from the sinus using a transantral approach. A bone fragment of the tooth was obtained and placed in the extraction socket via the transantral entrance and fixed with fibrin glue (Greenplast; Green Cross, Yongin, Korea) to close the oroantral fistula. After 5 months, an immature bone was formed in the sealed area where the bone graft was placed, without any complications. Tue, 31 Dec 2019 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/19116 2019-12-31T15:00:00Z https://oak.chosun.ac.kr/handle/2020.oak/19114 Title: Comparative study for osseointegration according to surface treatments of dental implants Author(s): Myung Hyun Jun; Myoung-ju Kim; You-song Sim; Min-suk Kook Abstract: The purpose of this study was to evaluate the effect of hydroxyapatite (HA) full-coating and resorbable blast media (RBM) on the osseointegration of implants placed in the bone. Twelve rabbits were used as experimental animals and three implants were installed in each tibia. Rabbits in the control group were provided with no additional treatments to the fixture. Rabbits in experimental group I were provided with RBM treatment and rabbits in experimental group II were provided with full HA coating. The animals were sacrificed 4 weeks after implantation. The parts of the tibia containing the implant were harvested and radiographs were acquired. Specimens were prepared for histological examination and histomorphometric analysis of the bone-to-implant contact (BIC) ratio. The extent of osseointegration of the implants was different among the groups. Histomorphometrically, the full HA coating group showed the highest BIC ratio, followed by the RBM treatment and the control group. The three groups significantly differed when using the Kruskal-Wallis test and Mann-Whitney U-test. These results suggest that the full HA coating and RBM treatment to the fixture can provide significantly higher osseointegration. The full HA coating provided more osseointegration than the RBM treatment. Tue, 31 Dec 2019 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/19114 2019-12-31T15:00:00Z https://oak.chosun.ac.kr/handle/2020.oak/19113 Title: Gingival and bone healing patterns with ridge preservation in beagle dogs Author(s): Xing-hui Piao; Hyo-seon Park; Eui-ri Na; Young-joon Kim; Jong-wook Moon Abstract: The aim of this study was to evaluate the clinical and histologic findings of bone and gingival healing patterns with ridge preservation. The mandibular third premolars were extracted from beagle dogs and the dogs were euthanized after 12 weeks. The ridge preservation was performed and the animals were divided into 3 groups, including 1) Control: extraction; 2) surederm group: extraction+acellular dermal matrix (Surederm); 3) collatape group: extraction+collagen membrane (Collatape). Changes in the keratinized gingiva and bone volume of the extraction sockets were measured. In the surederm and collatape group, the decrease in keratinization was small and statistically insignificant. The surederm group had significantly greater dimensions of buccal gingiva as compared to the control and collatape groups at 4 weeks. The surederm group had greater dimensions of buccal gingiva as compared to the control group at 8 weeks. Histological observation showed that in the surederm group, a dark red-colored osteoid seam was observed around the alveolar bone. Osteoid seams were observed directly below and to the side of the socket. In the collatape group, a connective tissue band was observed at the site of contact with the alveolar bone. Both experimental groups had more alveolar bone volume than the control. The alveolar bone volume in the surederm group was significantly greater than that of the collatape group. The results suggest that the acellular dermal matrix results in better healing patterns than other methods. Tue, 31 Dec 2019 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/19113 2019-12-31T15:00:00Z