https://oak.chosun.ac.kr/handle/2020.oak/18943 Thu, 28 Aug 2025 14:29:44 GMT 2025-08-28T14:29:44Z https://oak.chosun.ac.kr/handle/2020.oak/18974 Title: Root fracture of permanent incisor with type II dentinogenesis imperfecta Author(s): Jung-ha Park; Sang-ho Lee; Nan-young Lee; Se-ok Kwon; Young-mi Yoon; Sung-ok Im; Hwa-kyong Jeong Abstract: Dentinogenesis imperfecta is an autosomal dominant disease that involves incomplete calcification and irregular formation of dentine, hard tissue constructing crown and pulp chamber. The disease presents in deciduous as well as permanent teeth. Morphologically, thin root, round crown and cervical narrowness are observed and pulp chamber is small or defected. Because of these morphological characteristics, root fracture invariably occurs even with minor trauma. The prevalence of dentinogenesis imperfecta in primary dentition is reportedly higher than that of permanent dentition. Few studies have reported dentinogenesis imperfecta in permanent dentition. Although the diseased teeth are vulnerable to trauma, studies on root fracture of permanent teeth with dentinogenesis imperfecta are not often reported. We reported a case of root fracture in dentinogenesis imperfecta involved tooth and described the treatment and follow up. Thu, 31 Dec 2015 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/18974 2015-12-31T15:00:00Z https://oak.chosun.ac.kr/handle/2020.oak/18975 Title: Usage of retro MTA for apexogenesis in immature permanent teeth Author(s): Yong-ho Song; Sang-ho Lee; Nan-young Lee; Young-mi Yoon; Sung-ok Im; Se-ok Kwon; Hwa-kyoung Jeong Abstract: As long as the pulp vitality is maintained, partial pulpotomy can promote healing of the necrotized pulp and induce root development in the treatment of immature permanent crowns which are fractured and have pulp exposure due to trauma. However, mineral trioxide aggregate (MTA) is commonly used in this technique due to its superior sealing effect, but the disadvantage of discoloration when used for the anterior teeth still persists. In this case study, for prevention of tooth discoloration following regenerative root canal treatment, Retro MTA was used as an alternative for MTA. Retro MTA is made of zirconium aluminate cement, which replaces Portland cement used in MTA, which is thought to be the factor that induces discoloration. We report a successful case without any noticeable discoloration after applying Retro MTA, following partial pulpotomy. Thu, 31 Dec 2015 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/18975 2015-12-31T15:00:00Z https://oak.chosun.ac.kr/handle/2020.oak/18976 Title: A clinical study of wide implants with 5-6 mm lengths in mandible Author(s): Kyo-jin Ahn; Sang-yun Kim; Yang-jin Yi; Young-kyun Kim; Su-gwan Kim Abstract: In patients with a severely atrophic mandibular alveolar ridge, short implants (5-6 mm) were successfully placed and functional without the need for an invasive surgical procedure. We placed 19 implants 5 to 7 mm in diameter and 5 to 6 mm in length in 13 patients. During an average observation of 40.7 months, we measured marginal bone loss, survival rates, and success rates of the implants and analyzed the outcomes based on a review of the literature. During the clinical observation period, we recorded an implant survival rate of 100% and an average success rate of 94.7%. Average marginal bone loss was 0.23 mm, with marginal bone loss exceeding 1 mm at 1 year in only one case. On short-term observation, placement of implants having a wide diameter and 5 to 6 mm in length showed outstanding clinical results in patients with severe atrophy of the mandibular molar region. Therefore, favorable results can be expected with short implants as a possible treatment option without the need for complex surgical procedures. Thu, 31 Dec 2015 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/18976 2015-12-31T15:00:00Z https://oak.chosun.ac.kr/handle/2020.oak/18973 Title: Treatment of Stevens-Johnson syndrome Author(s): Jong-mo Ahn; Byung-yoon Roh Abstract: Stevens-Johnson syndrome with oral cavity, skin, ocular, genital involvement appears to be a form of erythema multiforme. The etiology of erythema multiforme is not clear, but it is related to infection, food allergy, drug allergy, radiation therapy, and so on. For treatment, drugs like corticosteroids and acyclovir are mainly used. This study presents a case report of a male patient with Stevens-Johnson syndrome which was well controlled by medication (steroid). Thu, 31 Dec 2015 15:00:00 GMT https://oak.chosun.ac.kr/handle/2020.oak/18973 2015-12-31T15:00:00Z