• Title/Summary/Keyword: Buccal

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The location of the mandibular canal in prognathic patients compared to subjects with normal occlusion

  • Jung, Yun-Hoa;Nah, Kyung-Soo;Cho, Bong-Hae
    • Imaging Science in Dentistry
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    • v.37 no.4
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    • pp.217-220
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    • 2007
  • Purpose: The purpose of this study was to compare the location of the mandibular canal in Class III malocclusion to its location in normal occlusion for adults. Materials and Methods: For this study 32 skeletal Class III patients and 26 normal patients were observed. Four measurements were taken on cross sectional tomography between the first and second molars: the distance from the mandibular canal to the inner surface of both the buccal and lingual cortices, the distance from the mandibular canal to the inferior border of the mandible, and the buccolingual width of the mandible. The buccolingual location of the canals was classified as lingual, central, or buccal. Each measurement was analyzed with an independent t test to compare Class III malocclusion to normal occlusion. Results: Compared to the control group, the prognathic group had a shorter distance from the canal to the inner surface of the lingual cortex and to the base of the mandible. A higher percentage of the canals were located lingually in the prognathic group. Conclusion: This study showed that the mandibular canal was located more lingually and inferiorly in prognathic patients than in patients with normal occlusion. These results could help surgeons to reduce injuries to the inferior alveolar nerve.

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Horizontal Ridge Augmentation using Ridge Expansion and Autogenous Tooth Bone Graft: A Case Report (치조능확장술과 자가치아골이식술을 이용한 치조능 수평증대술: 증례보고)

  • Kim, Young-Kyun;Yi, Yang-Jin
    • Journal of Dental Rehabilitation and Applied Science
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    • v.27 no.1
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    • pp.109-115
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    • 2011
  • Implants were placed after performing ridge expansion by inserting screws of gradually increasing thickness. Favorable clinical outcome was obtained. During surgery, buccal cortical plate fracture did not occur. Autogenous tooth bone graft material was grafted around the implant dehiscence defects and over the buccal cortical plate. The method involving the insertion of screws for ridge expansion is a successful and predictable technique for implant placement in narrow alveolar bone. Autogenous tooth bone graft material can be used for ridge augmentation and GBR.

AN ANALYSIS OF STRESS DISTRIBUTION IN THE CASE OF UNILATERAL MOLAR EXPANSION WITH PRECISION LINGUAL ARCH BY FINITE ELEMENT METHOD (구치 편측확장을 위한 Precision Lingual Arch 적용시 응력분포에 관한 유한요소법적 연구)

  • Koo, Bon-Chan;Sohn, Byung-Wha
    • The korean journal of orthodontics
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    • v.24 no.3 s.46
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    • pp.721-733
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    • 1994
  • Orthodontic tooth movement is closely related to the stress on the periodontal tissue. In this research the finite element method was used to observe the stress distribution and to find the best condition for effective tooth movement in the case of unilateral molar expansion. The author constructed the model of lower dental arch of average Korean adult and used $.032'\times.032'\times60mm$ TMA wire. The wire was deflected in the horizontal and vertical direction to give the 16 conditions. The following results were obtained ; 1. When the moment and force were controlled properly the movement of anchor tooth was minimized and the movement of moving tooth was maximized. 2. As the initial horizontal deflection increased the buccal displacement of both teeth was also increased. As the initial horizontal deflection increased the lingual movement of anchor tooth and the buccal movement of moving tooth increased. 3. When the initial horizontal and vertical deflection rate was 1.5 the effective movement of moving tooth was observed with minimal displacement of anchor tooth.

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Modulating Effect of Lupeol on the Expression Pattern of Apoptotic Markers in 7, 12-Dimethylbenz(a)anthracene Induced Oral Carcinogenesis

  • Manoharan, S.;Palanimuthu, D.;Baskaran, N.;Silvan, S.
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.11
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    • pp.5753-5757
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    • 2012
  • Apoptosis, also known as cell suicide or programmed cell death, removes unwanted and genetically damaged cells from the body. Evasion of apoptosis is one of the major characteristic features of rapidly proliferating tumor cells. Chemopreventive agents inhibit or suppress tumor formation through apoptotic induction in target tissues. The aim of the present study was to investigate the pro-apoptotic potential of lupeol during 7,12-dimethylbenz(a) anthracene (DMBA) induced hamster buccal pouch carcinogenesis. Topical application of 0.5% DMBA three times a week for 14 weeks in the buccal pouches of golden Syrian hamsters resulted in oral squamous cell carcinoma. The expression pattern of apoptotic markers was analyzed using immunohistochemistry (p53, Bcl-2, Bax) and ELISA reader (caspase 3 and 9). In the present study, 100% tumor formation with defects in apoptotic markerexpression pattern was noticed in hamsters treated with DMBA alone. Oral administration of lupeol at a dose of 50mg/kg bw completely prevented the formation oral tumors as well as decreased the expression p53 and Bcl-2, while increasing the expression of Bax and the activities of caspase 3 and 9. The present study thus indicated that lupeol might inhibit DMBA-induced oral tumor formation through its pro-apoptotic potential in golden Syrian hamsters.

First Record of Amphisiella milnei (Ciliophora, Stichotrichida) from Korea

  • Choi, Jung Min;Jung, Jae-Ho;Kim, Young-Ok
    • Animal Systematics, Evolution and Diversity
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    • v.34 no.3
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    • pp.143-151
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    • 2018
  • A marine ciliate Amphisiella milnei (Kahl, 1932) $Horv{\acute{a}}th$, 1950 was discovered from the tidal pool of Baekdo Island, South Korea. The existence of extra cirri between leftmost frontal cirrus and buccal cirrus discriminates this species from its congeners. Its morphological features are described as follows: body size in vivo $110-130{\times}35-45{\mu}m$; elongate rectangular to elliptical in shape; two large and several small ring-shaped structures; yellowish cortical granules arranged irregularly on ventral side but longitudinally along dorsal kineties on dorsal side; 34-40 adoral membranelles, 3 frontal cirri, 1 buccal cirrus, 1 parabuccal cirrus, usually 2 extra cirri behind leftmost frontal cirrus, and 3 frontoventral cirri; amphisiellid median cirral row composed of 25-31 cirri with 27-36 left and 27-44 right marginal cirri; usually 5 transverse cirri and 2 pretransverse cirri with 7 dorsal kineties; two macronuclear nodules. In addition to, 18S rDNA sequence of A. milnei was analyzed to understand its phylogenetic relationship.

Angiolymphoid Hyperplasia with Eosinophilia (ALHE) of the Oral Cavity: a Case Report (구강내에 발생한 혈관림프증식증: 증례보고)

  • Cho, Dong-Baek;Park, Ji-Un;Baek, Ji-Young;Choi, Won-Sik
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.32 no.6
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    • pp.573-576
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    • 2010
  • Angiolymphoid hyperplasia with eosinophilia (ALHE) is a rare benign vascular lesion that is characterized by proliferation of small to medium-sized vascular structures lined by histiocytoid or epithelioid endothelial cells and often accompanied by an inflammatory infiltrate comprising lymphocytes, plasma cells and eosinophils. A 34-year-old man without any generalized systemic conditions presented with a slowly enlarging painless swelling in the buccal area. An excisional biopsy was conducted and the diagnosis of Angiolymphoid hyperplasia with eosinophilia was confirmed. We report a case of angiolymphoid hyperplasia with eosinophilia of the buccal area in oral cavity and review the previously reported cases and literatures of angiolymphoid hyperplasia with eosinophilia.

THE DENTAL ARCH FORM IN NORMAL OCCLUSION (정상교합자의 치열궁 형태)

  • Kwon, Yong-Chul;Sung, Jung-Ok;Kwon, Oh-Won;Sung, Jae-Hyun
    • The korean journal of orthodontics
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    • v.19 no.1 s.27
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    • pp.95-106
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    • 1989
  • This study was designed to investigate dental arch shapes buccally and lingually at Bracket Level of Koreans. This involved studying 63 inviduals (37 males, 26 females) with normal occlusion ranging in age from 17 to 24 years old. The landmarks were digitized and measurements and statistical analysis were performed by NEC 9801 V-M computer. The Results were as Follows: Bicanine width, Bipremolar width and Bimolar width were larger in males than in females. Buccal and lingual arch form and coordination form were obtained by NEC 9801 V-M computer. The parabolic equations which represents buccal and lingual arch form were obtained.

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