• Title/Summary/Keyword: tooth, impacted

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TREATMENT OF THE IMPACTED LOWER SECOND MOLARS (매복된 하악 제2대구치 맹출유도의 치험례)

  • Hahn, Soo-Kyoung;Kim, Jung-Wook;Lee, Sang-Hoon;Kim, Chong-Chul;Hahn, Se-Hyun;Jang, Ki-Taeg
    • Journal of the korean academy of Pediatric Dentistry
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    • v.31 no.1
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    • pp.41-45
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    • 2004
  • In the normal growth and development of the mandible, the molar tooth buds distal to the first permanent molar have a mesial inclination. This inclination is usually self-correcting, but, unfortunately, this self-correction does not always occur. The first case is about, 14-year-old female patient with familial history of lower second molar impaction. Her lower second molars were both impacted, and she was treated with sectional wires and open-coil springs. The second case, 14-year-old male, we treated his impacted #47 with Halterman appliance. The third case, 11-year-old male, his both mandibular second molars were impacted during full-fixed orthodontic treatment. They were treated with brass wire, sectional wire and open-coil spring.

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Characteristics of bony changes and tooth displacement in the mandibular cystic lesion involving the impacted third molar

  • Lee, Jin-Hyeok;Kim, Sung-Min;Kim, Hak-Jin;Jeon, Kug-Jin;Park, Kwang-Ho;Huh, Jong-Ki
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.40 no.5
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    • pp.225-232
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    • 2014
  • Objectives: The purpose of this retrospective study is to find the differentiating characteristics of cystic and cystic-appearing lesions that involve the impacted mandibular third molar by analyzing panoramic radiographs and computed tomography images, and to aid the preoperative diagnosis. Materials and Methods: Eighty-one patients who had a mandibular cystic or cystic-appearing lesion that involved impacted mandibular third molar and underwent cyst enucleation were included in the study. The preoperative panoramic radiograph and computed tomography findings were analyzed in accordance to the histopathologic type. Results: Most of the cystic lesions containing the mandibular third molar were diagnosed as a dentigerous cyst (77.8%). The occurrence of mesio-distal displacement of the third molar was more frequent in the odontogenic keratocyst (71.4%) and in the ameloblastoma (85.7%) than in the dentigerous cyst (19.1%). Downward displacement was primarily observed in each group. Odontogenic keratocyst and ameloblastoma showed more aggressive growth pattern with higher rate of bony discontinuity and cortical bone expansion than in dentigerous cyst. Conclusion: When evaluating mandibular cystic lesions involving the impacted mandibular third molar, dentigerous cyst should first be suspected. However, when the third molar displacement and cortical bone absorption are observed, then odontogenic keratocyst or ameloblastoma should be considered.

The efficacy of an elevated concentration of lidocaine HCl in impacted lower third molar surgery

  • Ping, Bushara;Kiattavorncharoen, Sirichai;Saengsirinavin, Chavengkiat;Im, Puthavy;Durward, Callum;Wongsirichat, Natthamet
    • Journal of Dental Anesthesia and Pain Medicine
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    • v.15 no.2
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    • pp.69-76
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    • 2015
  • Background: There have been few studies on the effect of an elevated concentration of lidocaine hydrochloride in the surgical removal of an impacted lower third molar. This study aimed to examine the efficacy of 4% lidocaine along with 1:100,000 epinephrine compared to 2% lidocaine along with 1:100,000 epinephrine as inferior alveolar nerve block for the removal of an impacted lower third molar. Methods: This single-blind study involved 31 healthy patients (mean age: 23 y; range: 19-33 y) with symmetrically impacted lower third molars as observed on panoramic radiographs. Volunteers required 2 surgical interventions by the same surgeon with a 3-week washout period. The volunteers were assigned either 4% lidocaine with 1:100,000 epinephrine or 2% lidocaine with 1:100,000 epinephrine as local anesthetic during each operation. Results: We recorded the time of administration, need for additional anesthetic administration, total volume of anesthetic used. We found that the patient's preference for either of the 2 types of local anesthetic were significantly different (P < 0.05). However, the extent of pulpal anesthesia, surgical duration, and duration of soft tissue anesthesia were not significantly different. Conclusions: Our study suggested that inferior alveolar nerve block using 4% lidocaine HCl with 1:100,000 epinephrine as a local anesthetic was clinically more effective than that using 2% lidocaine HCl with 1:100,000 epinephrine; the surgical duration was not affected, and no clinically adverse effects were encountered.

Radiographic features of cleidocranial dysplasia on panoramic radiographs

  • Symkhampha, Khanthaly;Ahn, Geum Sun;Huh, Kyung-Hoe;Heo, Min-Suk;Lee, Sam-Sun;Kim, Jo-Eun
    • Imaging Science in Dentistry
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    • v.51 no.3
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    • pp.271-278
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    • 2021
  • Purpose: This study aimed to investigate the panoramic imaging features of cleidocranial dysplasia (CCD) with a relatively large sample. Materials and Methods: The panoramic radiographs of 40 CCD patients who visited Seoul National University Dental Hospital between 2004 and 2018 were analyzed. Imaging features were recorded based on the consensus of 2 radiologists according to the following criteria: the number of supernumerary teeth and impacted teeth; the shape of the ascending ramus, condyle, coronoid process, sigmoid notch, antegonial notch, and hard palate; the mandibular midline suture; and the gonial angle. Results: The mean number of supernumerary teeth and impacted teeth were 6.1 and 8.3, respectively, and the supernumerary teeth and impacted teeth were concentrated in the anterior and premolar regions. Ramus parallelism was dominant (32 patients, 80.0%) and 5 patients (12.5%) showed a mandibular midline suture. The majority of mandibular condyles showed a rounded shape (61.2%), and most coronoid processes were triangular (43.8%) or round (37.5%). The mean gonial angle measured on panoramic radiographs was 122.6°. Conclusion: Panoramic radiographs were valuable for identifying the features of CCD and confirming the diagnosis. The presence of numerous supernumerary teeth and impacted teeth, especially in the anterior and premolar regions, and the characteristic shapes of the ramus, condyle, and coronoid process on panoramic radiographs may help to diagnose CCD.

The radiographic localization of unerupted maxillary incisors and supernumeraries

  • Kim Jae-Duk;Lee Chang-Yul;You Choong-Hyun
    • Imaging Science in Dentistry
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    • v.33 no.4
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    • pp.217-221
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    • 2003
  • Purpose : To evaluate the use of the vertical tube shift from a panoramic film and a periapical film to localize unerupted maxillary incisors and supernumeraries. Materials and Methods : The total of 103 displaced maxillary incisors or embedded supernumeraries were examined in this study. The vertical tube shift technique with panoramic and periapical radiography by normal projection taken and compared to localize the position of the embedded maxillary incisors or supernumeraries by a radiologist and 5 general dentists. The gold standard used for the radiographic comparisons was the true position of the embedded tooth as confirmed by horizontal tube shift technique using three periapical radiographs. The general dentist examiners were instructed on the use of the modified acronym 'SLDOBU' by the radiologist as it pertains to panoramic radiographs as the principle of vertical tube shift. Results: All of the embedded maxillary incisors and supernumeraries were successfully located using the vertical tube shift from a panoramic and a maxillary anterior periapical radiograph by the radiologist and 5 general dentists. Conclusion: The use of a panoramic film with a periapical film combination for a vertical tube shift can be useful to localize unerupted maxillary incisors and supernumeraries.

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CLINICAL, RADIOGRAPHIC AND HISTOPATHOLOGIC ANALYSIS OF ODONTOMA (치아종의 임상적, 방사선학적, 조직병리학적 분석)

  • Jang, Hyun-Seon;Kim, Su-Gwan
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.23 no.4
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    • pp.332-337
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    • 2001
  • An odontoma is a slow growing and nonaggressive odontogenic tumor composed of enamel, dentin, cementum, and pulp tissue. The etiology of odontomas is unknown, although local trauma, infection, and genetic factors have been suggested. Odontomas are classified as compound odontoma or complex. A 20-year retrospective study was performed on 36 odontomas from the files of the Department of Oral Pathology at Chosun University School of Dentistry. Fifty-six percent of the patients were compound odontoma and 44% were complex odontoma. 56 percent of the patients were female and 44% were male. The odontoma is most often diagnosed in the second decade of life, during routine radiographic examination. The usual presenting symptoms are an impacted or and unerupted tooth, a retained primary tooth. Other less frequent signs and symptoms are pain, swelling, suppuration, foul odor, tooth mobility. In our patients were treated by enucleation of the tumor, and related teeth were treated by surgical extraction or orthodontically assisted eruption.

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Benign cementoblastoma of the anterior mandible: an unusual case report

  • Caliskan, Armagan;Karoz, Tugce Berre;Sumer, Mahmut;Acikgoz, Aydan;Sullu, Yurdanur
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.42 no.4
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    • pp.231-235
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    • 2016
  • A benign cementoblastoma, which is another name for a true cementoma, is a rare neoplasm that develops from odontogenic ectomesenchyme. It is characterized by a mineralized mass attached to the apex of the root produced by neoplastic cementoblasts. More than 75% of cases arise in the mandible, with 90% of them manifesting in the molar and premolar regions. This neoplasm occurs most commonly in children and young adults, with males being affected slightly more than females. Radiographically, the tumor is observed as a well-defined radiopaque mass that is fused to a tooth root and is surrounded by a radiolucent rim. The treatment of benign cementoblastoma consists of removal of the lesion and extraction of the affected tooth. This report presents an unusual case of benign cementoblastoma in a 31-year-old female, presenting as a densely mineralized mass seen at the apex of the impacted right mandibular canine tooth on radiographs.

TOOTH TRANSPLANTATION AFTER SURGICAL REMOVAL OF ODONTOMA: A CASE REPORT (치아종 제거후 시행한 자가치아이식술)

  • Kim, Jong-Woon;Kim, Su-Gwan;Kim, Soo-Heung;Chung, Tae-Young
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.23 no.3
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    • pp.244-247
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    • 2001
  • We report a case in which a right mandibular incisor was impacted beneath an odontoma in the anterior mandible. An odontoma at the symphyseal region was removed under general anesthesia, and bone was grafted. Tooth #41, which was beneath the lesion, was extracted and transplanted to its original site. It was splinted with resin for 2 weeks and was checked at intervals during that time. After 4 months, it was filled endodontically with calcium hydroxide.

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Surgical and Orthodontic Treatment of Unicystic Ameloblastoma Related to an Impacted Molar Tooth in the Mandible: Case Report (낭종성 법랑모세포종으로 인하여 매복된 하악 구치의 교정-외과 치료: 증례보고)

  • Moon, Cheol-Hyun;Kim, Hyeon-Min;Park, Dae-Song;Kim, Dong-Woo;Lee, Sang-Chil;Kim, Sung-Yong;Lim, Ho-Yong;Yeom, Hak-Yeol
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.33 no.5
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    • pp.435-439
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    • 2011
  • Ameloblastoma is an aggressive benign odontogenic epithelial tumour that may arise from the enamel organ, remnants of dental lamina, or the lining of an odontogenic cyst. It is usually categorized into solid or multicystic, unicystic, and peripheral types. Treatment ofameloblastomas include conservative methods such as marsupialisation, enucleation, and curettage; and radical treatments such as marginal or segmental resection. Radical treatments have resulted in lower recurrence rates; however, may also encounter esthetic, functional, and reconstructive problems. Unicystic ameloblastoma has been considered less aggressive and a lower recurrence tendency. Thus, many authors have recommended conservative treatment in cases of unicystic ameloblastoma. An 11 year-old boy presented with displaced second and third molars by luminal unicystic ameloblastoma in the mandible. Cyst enucleation, curettage, and third molar extraction were done. No signs of recurrence or esthetic problems such as facial asymmetry were seen radiologically and clinically, up to 8 years 2 months postoperatively.

GENERALIZED HYPERCEMENTOSIS WITH ARRESTED DENTAL ERUPTION IN A CEREBRAL PALSY PATIENT : A CASE REPORT (뇌성마비 환자의 지연맹출을 동반한 다발성 과백악질증 : 증례보고)

  • Kim, Byurira;Sun, Yeji;Song, Je Seon;Lee, Jae-ho
    • The Journal of Korea Assosiation for Disability and Oral Health
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    • v.13 no.2
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    • pp.91-94
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    • 2017
  • Hypercementosis is an excessive deposition of secondary cementum on the root of a tooth. It is mostly presented as a solitary lesion or in rare cases as a generalized type, but which is seldom recognized; typically it is discovered during regular dental X-ray. Increased thickness of cementum is not uncommon but generalized hypercementosis on impacted permanent teeth which may cause delayed eruption is rarely reported. This case report discusses a patient with cerebral palsy, epilepsy and mental retardation that presents multiple hypercementosis with delayed eruption. On intraoral examination, multiple retained primary molar teeth were found. As there was no any further symptoms, regular dental checkup had been done for several years. In 2015, a surgical opening was performed in the second molar area, but there was no specific change. Panoramic view showed multiple impacted permanent teeth with increased thickness of roots due to excessive deposition of cementum. Hypercementosis was also observed in the root of the erupted tooth. Several laboratory test results including hormone, urine, complete blood count test were reviewed. The patient was also diagnosed with subclinical hypothyroidism, impaired fasting glucose and had been taken valproic acid($Orfil^{(R)}$) for 10 years. However, none of them clearly explained generalized hypercementosis or delayed eruption. The patient is now 24 years old and regular dental checkups and radiographs are taken to confirm that there is no change in the lesion.