• 제목/요약/키워드: Buccal plate

검색결과 54건 처리시간 0.028초

하악구치부 보철공간을 위한 상악구치부의 분절골절단 및 상방 정위 (SURGICAL REPOSITIONING OF THE EXTRUDED DENTO-ALVEOLAR SEGMENTS BY THE SINGLE-STAGE POSTERIOR MAXILLARY SEGMENTAL OSTEOTOMY)

  • 김명래;김충;김형섭
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제23권4호
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    • pp.338-347
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    • 2001
  • Purpose: This is to review the cases of posterior maxillary segmental osteotomies to regain the interarch spaces for dental implants in the posterior mandible. Materials & Methods: Seven patients who presented with alveolar extrusion of upper posterior molars underwent segmental osteotomies by single-stage Kufner's buccal approach under the intravenous sedation and local anesthesia. The posterior maxillary cento-alveolar segments were repositioned upward using pre-fabricated palato-occlusal resin splints and immobilized with osteosynthesis microplates and screws. Dental implants were installated simultaneously. The regained spaces, tooth vitality, periodontal healing, relapse, tenderness on function, and complications including maxillary sinus involvements were evaluated periodically for over one year after the surgeries. Results: The single-tage procedures were completed within 80 minutes without any surgical complications. The posterior maxillary segments were repositioned upward to regain the interarch spaces ranging from 2.5 to 5.5mm. All teeth involved in the procedures keep their vitalities. The repositioned segments were maintained showing neither evidence of periodontal break-down nor tenderness to function. One patient whose segments had not been immobilized by osteosynthesis plate resulted in 2mm down-ward relapse in post-operative 8 months. A case of postoperative nasal bleeding from the posterior-lateral wall resulted in oroantral fistula and chronic maxillary sinusitis later. Conclusion: The extruded dento-alveolar segments of the posterior maxilla were repositioned properly by Kufner's one-stage segmental osteotomies. One microplate can be of help to keep the position until the osseous healing enough to support the masticatory force.

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The use of digital periapical radiographs to study the prevalence of alveolar domes

  • Xambre, Pedro Augusto Oliveira Santos;Valerio, Claudia Scigliano;Cardoso, Claudia Assuncao e Alves;Custodio, Antonio Luis Neto;Manzi, Flavio Ricardo
    • Imaging Science in Dentistry
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    • 제46권3호
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    • pp.179-184
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    • 2016
  • Purpose: In the present study, we coined the term 'alveolar dome' and aimed to demonstrate the prevalence of alveolar domes through digital periapical radiographs. Materials and Methods: This study examined 800 digital periapical radiographs in regard to the presence of alveolar domes. The periapical radiographs were acquired by a digital system using a photostimulable phosphor (PSP) plate. The ${\chi}^2$ test, with a significance level of 5%, was used to compare the prevalence of alveolar domes in the maxillary posterior teeth and, considering the same teeth, to verify the difference in the prevalence of dome-shaped phenomena between the roots. Results: The prevalence of alveolar domes present in the first pre-molars was statistically lower as compared to the other maxillary posterior teeth (p<0.05). No statistically significant difference was observed in the prevalence of alveolar domes between the maxillary first and second molars. Considering the maxillary first and second molars, it was observed that the palatal root presented a lower prevalence of alveolar domes when compared to the distobuccal and mesiobuccal roots (p<0.05). Conclusion: The present study coined the term 'alveolar dome', referring to the anatomical projection of the root into the floor of the maxillary sinus. The maxillary first and second molars presented a greater prevalence of alveolar domes, especially in the buccal roots, followed by the third molars and second pre-molars. Although the periapical radiograph is a two-dimensional method, it can provide dentists with the auxiliary information necessary to identify alveolar domes, thus improving diagnosis, planning, and treatment.

치과 보철물 합금 성분중 니켈, 코발트, 크롬 및 구리에 대한 감작률에 관한 조사 연구 (SENSITIVITY TO NICKEL, COBALT, CHROME, & COFFER IN DENIAL ALLOYS)

  • 박영미;최대균;최부병
    • 대한치과보철학회지
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    • 제30권2호
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    • pp.155-166
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    • 1992
  • In dentistry, precious metal alloys are, mainly due to economic factors, increasingly displaced by alternatives containing Ni-Cr-Co. There are some reports where hypersensitive reactions to Ni-Cr-Co alloys are presented and discussed. The reactions reported vary from mucosa contact stomatitis to generalized dermatitis without any oral mucosal reaction. The purpose of this study was to investigate the incidence of nickel, chrome, cobalt and copper, and to know whether subjects with positive skin reaction to nickel would also demonstrate adverse intraoral reaction to a non-precious metal nickel. The patch tests were performed in 81 subjects(male 39, female 42) and nickel sulfate 5% aq., potassium bichromate 0.5% at., cobalt chloride 2% aq., & copper sulfate 1% aq., were used for test allergens. And then the intraoral tests were performed in 16 subjects, 8 subjects with positive allergic skin reaction to nickel and 8 subjects with negative allergic skin reaction. A pure metallic nickel plate was attached to the buccal side of the upper second premolar. The results are as follows : 1. The frequency of nickel sensitivity was 9.9% (2 men, 6 women), cobalt was 4.9% (1 man, 3 women), and chrome was 2.5% (2 men) respectively and there was no positive reaction to copper 2. The positive reactions were 8 of 23 (34.8%) with a history of jewelry allergic reactions and 3 of 58 (5.1%) without a history of jewelry allergic reactions. 3. Three of 8 subjects with positive skin reaction. gave reactions to the metal plates.

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Sturge Weber syndrome 환아의 증례보고 (STURGE WEBER SYNDROME : A CASE REPORT)

  • 황지원;김성오;최형준;최병재;이제호
    • 대한장애인치과학회지
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    • 제6권1호
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    • pp.15-18
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    • 2010
  • 1. 본 증례는 Strurge Weber syndrome으로 진단받은 11세 여아로 SWS의 3요소 중 연수막 맥관종, 안구이상의 소견을 보이고 있었다. 2. SWS는 여러 분야의 다원적 접근 및 치료계획이 필요하며, 여러 가지 구강 내 증상들을 동반할 수 있으므로, 구강 위생 교육과 정기적 구강검진을 실시하여 환자의 구강 건강을 증진시킬 수 있고 그들의 삶의 질을 향상시킬 수 있다는 점에서 치과의사의 역할이 중요하며 따라서 이 질병의 특징과 증상들에 대하여 잘 숙지할 필요가 있다. 3. SWS 환자에서 발치나 치은이나 구강점막의 외과적 시술이 시행되는 경우 심한 출혈을 일으킬 수 있으므로 세심한 주의를 필요로 한다.

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자가 블록골을 이용한 치조골수평증강술과 임프란트 식립 (HORIZONTAL AUGMENTATION WITH AUTOGENOUS BLOCK BONE AND IMPLANT PLACEMENT)

  • 안지연;김영균;윤필영;황정원
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제29권5호
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    • pp.444-450
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    • 2007
  • In general, labiolingual or buccolingual widths of residual alveolar bone are insufficient in edentulous area, because of alveolar resorption. Horizontal augmentation is bone graft procedure with a view to reinforcing horizontally insufficient bone quantity for installation of implants. The standard method is taking appropriate amount of block bone from intraoral or extraoral autogenous bone, and solid fixation with screws or mini-plate on labial or buccal side of residual alveolar bone. The purpose of this study is to discuss clinical usefulness of horizontal augmentation with autogenous block bone by observation and analysis of course of 41 implants installed to 12 patients by horizontal augmentation in Seoul National University Bundang Hospital from July, 2002 to December, 2005. The mean age of patients is 52.7, from 19 to 70, and the number of men and women is each 2 and 10. Block bone was taken from symphysis, body, ramus of mandible or iliac bone. And 6 types of implants were installed simultaneously or not, the diameters of implants are from 3.3 to 5.5mm, the lengths are from 8 to 15mm. The operator added artificial bone grafting material and optionally covered with membrane. The mean periods of observation after operation and final prosthetics were 28.6 and 17.0 months. As a result, 40 among 41 implants survived, the survival rate was 97.6%. Average 0.9mm crestal resorption was observed at final point of time by periapical view of each patients. Major complication related to the procedure was numbness in 7 patients.

Endodontic micro-resurgery and guided tissue regeneration of a periapical cyst associated to recurrent root perforation: a case report

  • Fernando Cordova-Malca;Hernan Coaguila-Llerena;Lucia Garre-Arnillas;Jorge Rayo-Iparraguirre;Gisele Faria
    • Restorative Dentistry and Endodontics
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    • 제47권4호
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    • pp.35.1-35.9
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    • 2022
  • Although the success rates of microsurgery and micro-resurgery are very high, the influence of a recurrent perforation combined with radicular cyst remains unclear. A 21-year-old white female patient had a history of root perforation in a previously treated right maxillary lateral incisor. Analysis using cone-beam computed tomography (CBCT) revealed an extensive and well-defined periapical radiolucency, involving the buccal and palatal bone plate. The perforation was sealed with bioceramic material (Biodentine) in the pre-surgical phase. In the surgical phase, guided tissue regeneration (GTR) was performed by combining xenograft (lyophilized bovine bone) and autologous platelet-rich fibrin applied to the bone defect. The root-end preparation was done using an ultrasonic tip. The retrograde filling was performed using a bioceramic material (Biodentine). Histopathological analysis confirmed a radicular cyst. The patient returned to her referring practitioner to continue the restorative procedures. CBCT analysis after 1-year recall revealed another perforation in the same place as the first intervention, ultimately treated by micro-resurgery using the same protocol with GTR, and a bioceramic material (MTA Angelus). The 2-year recall showed healing and bone neoformation. In conclusion, endodontic micro-resurgery with GTR showed long-term favorable results when a radicular cyst and a recurrent perforation compromised the success.

Morphometric analysis of maxillary alveolar regions for immediate implantation

  • Park, Man-Soo;Park, Young-Bum;Choi, Hyunmin;Moon, Hong-Seok;Chung, Moon-Kyu;Cha, In-Ho;Kim, Hee-Jin;Han, Dong-Hoo
    • The Journal of Advanced Prosthodontics
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    • 제5권4호
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    • pp.494-501
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    • 2013
  • PURPOSE. The purpose of this study was to provide an actual guideline in determining the shape, diameter, and position of the implant in immediate implantation by the measurement of the thickness of facial and palatal plate, the thickness of cortical bone on the facial and palatal plate, the diameter of the root, and the distance between the roots in the cadavers. MATERIALS AND METHODS. The horizontal sections of 20 maxillae were measured and analyzed to obtain the average values. Resin blocks were produced and cut serially at 1 mm intervals from the cervical line to the root apex. Images of each section were obtained and the following measurements were performed: The thickness of the facial and palatal residual bone at each root surface, the thickness of the facial and palatal cortical bone at the interdental region, the diameter of all roots of each section on the faciopalatal and mesiodistal diameter, and the interroot distance. Three specimens with measurements close to the average values were chosen and 3-dimensional images were reconstructed. RESULTS. The thickness of the facial and palatal cortical bone at the interdental region in the maxilla, the buccal cortical bone was thicker in the posterior region compared to the anterior region. The interroot distance of the alveolar bone thickness between the roots increased from anterior to posterior region and from coronal to apical in the maxilla. CONCLUSION. In this study, the limited results of the morphometric analysis of the alveolar ridge using the sections of maxilla in the cadavers may offer the useful information when planning and selecting optimal implant for immediate implantation in the maxilla.

자가골 블럭 이식을 이용한 수평골 증강술시 이식골의 치유 (THE HISTOLOGIC STUDY OF BONE HEALING AFTER HORIZONTAL RIDGE AUGMENTATION USING AUTO BLOCK BONE GRAFT)

  • 오재권;최병준;이백수
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제31권3호
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    • pp.207-215
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    • 2009
  • Purpose: The aim of the present study is to evaluate the long term bone healing after horizontal ridge augmentation using auto block bone graft for implant installation timing. Materials and Methods: Five Beagle dogs(which were 14 months old and weighted approximately 10kg). In surgery 1(extraction & bone defect), premolars(P2, P3,P4) were extracted and the buccal bone plate was removed to create a horizontally defected ridge. After three months healing, in surgery 2(ridge augmentation). Auto block bone grafts from the mandibular ramus were used in filling the bone defects were fixed with stabilizing screws. The following fluorochrome labels were given intravenously to the beagle dogs: oxytetracycline 1week after the surgery, alizarin red 4 weeks after the surgery, calcein blue 8 weeks after the surgery. The tissue samples were obtained from the sacrificed dogs of 1, 4, 8, 12, 16 weeks after the surgery. Non-decalcified sections were prepared by resin embedding and microsection to find thickness of $10{\mu}m$ for the histologic examination and analysis. Results: 1. We could achieve the successful reconstruction of the horizontal bone defect by auto block bone graft. The grafted bone block remained stable morohologically after 16 weeks of the surgery. 2. In the histologic view. We observed osteoid tissue from the sample $4^{th}$ week sample and active capillary reconstruction in the grafted bone from the $12^{th}$ week sample. Healing procedures of auto bone grafts were compared to that of the host bone. 3. Bone mineralization could be detected from the $8^{th}$ week sample. 4. Fluorochrome labeling showed active bony changes and formation at the interface of the host bone and the block graft mainly. Bony activation in the grafted bone could be seen from the $4^{th}$ week samples. Conclusions: Active bone formation and remodeling between the grafted bone and host bone can be seen through the revascularization. After the perfect adhesion to host bone, Timing of successful implant installation can be detected through the ideal ridge formation by horizontal ridge augmentation.

한국산 야생 오소리에서 분리한 오소리구충 (Tetragomphius procyonis)의 광학 및 주사전자현미경 소견 (Light and Scanning Electron Microscopy of Tetragomphius procyonis (Ancylostomatoidea) from Wild Badger)

  • 손화영;오윤희;김현철;박배근
    • 한국임상수의학회지
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    • 제26권4호
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    • pp.379-385
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    • 2009
  • 계룡산국립공원으로부터 기증된 야생오소리의 췌장에서 오소리구충 (Tetragomphius procyonis)을 분리하여 광학 및 주사전자현미경으로 그 형태를 관찰하였다. 충체의 길이는 수컷 15.0-18.8 mm, 암컷 21.5-25.5 mm에 달하였다. 암수 모두 구강 복면 변연에 한 쌍의 절판과 배면에 하나의 절판이 존재하였다. 컵모양의 구강 기저부에 한쌍의 분기된 아복치 및 한쌍의 아배치가 존재하였다. 충체 전체에 가로 줄무늬가 존재하였고 경부유두 선상의 복측 중앙에 배설공이 개구하였다. 가늘고 긴 교접자 (8.7-9.3 mm)는 그 끝이 서로 융합되어 있었다. 교접낭은 잘 발달되어 있었으며 잘 발달된 배늑은 평행으로 주행하였다. 음문은 충체 후방 4/5 부위에 개구하였고 꼬리에는 미돌기 및 미유두가 존재하지 않았다. 배구 및 부교접자가 존재하지 않았으며 음문은 체후방 4/5에 개구하였다. 자궁내의 충란은 16 세포기였고 직장내의 충란은 32 세포기였으며 충란의 크기는 77.48-83.45 ${\times}$ 50.75-63.38 ${\mu}m$였다.

후박 및 은행잎 추출물의 향균, 향염 및 세포활성도에 미치는 영향 (BIOLOGICAL EFFECT OF MAGNOLIA AND GINKGO BILOBA EXTRACT TO THE ANTIMICROBIAL, ANTIINFLAMMATORY AND CELLULAR ACTIVITY)

  • 정종평;구영;배기환
    • Journal of Periodontal and Implant Science
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    • 제25권3호
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    • pp.478-486
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    • 1995
  • Periodontal therapy for treatment of periodontitis involves the elimination of bacterial plaque and elimination of the anatomic defects by regenerative procedure. The purpose of this study was to evaluate on the biological effect of magnolia and Ginkgo biloba extract to the antimicrobial, antiinflammatory and cellular activity. Antimicrobial assay was performed with the diffusion method of the extract by measuring of growth inhibitory zone of B. cereus from blood agar plate. Effect of the extract to cellular activity of gingival fibroblast were examined using MTT method and measured the result with optical density on 570nm by ELISA reader. Inhibitory effects of $PGE_2$ production from gingival fibroblast was performed with the addition of $IL-l{\beta}$ and the extract to the well and examined to the product of $PGE_2$ from cell by ELISA reader. In vivo anti-inflammatory effect was performed with injection examined with clinically and histologically for their extent of mecrosis and inflammation. Antimicrobial activity of Magnolia extract showed significantly higher activity than that of control. However, GBE did not showed significant activity to compare with control, and mixture of Magnolia and GBE extract showed significantly higher activity than that of control. The effect of cellular activity to gingival fibroblast showed no significant differences of between control and Magnolia extract. However, GBE showed significantly higher rate of cellular activity to compare with control and even to PDGF-BB, and also showed same degree of cellular activity even though mixed with Magnolia extract. The inhibitory effect of $PGE_2$ production showed significantly reduction of $PGE_2$ production to compare with control, but its inhibitory effect was not much strong to compare with Indomethacin. In vivo, antiinflammatory effect of Magnolia extract to P. gingivalis injection of Hamster buccal check showed significantly reduction of inflammatory cell infiltration and tissue necrosis, but GBE showed no effect on the inhibition of inflammatory process. These results suggested that Magnolia and GBE extract possessed different kind of biological activity and also can be compensated on their activity with each other for elimination of bacterial plaque and anatonical defect.

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