• Title/Summary/Keyword: Atrophic maxilla

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A CLINICAL STUDY OF MAXILLARY SINUS LIFT FOR DENTAL IMPLANT (임프란트 식립을 위한 상악동 거상술의 임상적 연구)

  • Lee, Seong-Jae;Jang, Hyon-Seok;Lee, Boo-Kyu;Kwon, Jong-Jin;Rim, Jae-Suk
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.21 no.4
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    • pp.376-381
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    • 1999
  • A variety of materials and procedures such as sinus floor elevation, sinus-lift graft, inlay bone graft using Le Fort I osteotomy, and onlay graft have been used to create adequate bone volume in the maxillary sinus for placement of endosseous implants in the posterior atrophic maxilla. Because of the frequent lack of bone in the posterior maxilla, sinus lift procedure has become a commonly practiced treatment modality. The 138 endosseous implants of 36 patients with sinus augmentation procedures performed in Korea University Hospital from January 1991 to December 1998 were summarized and analysed. The result of this study were as follows: 1. Age ranged from 39 to 57, with a mean of 50.7. 2. The mean survival rate for 138 implants with maxillary sinus lift procedure was 80.4%. 3. There was no corelationship between the fixture length, width and the survival rate. 4. The result showed that the healing period for 8-12 months was necessary if the residual alveolar bone height was less than 5mm. 5. Autogenous iliac corticocancellous block graft showed the most favorable survival rate(95%).

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Implant placement simultaneously sinus augmentation using crestal approach in severely atrophic maxilla; minimally invasive approach (골 흡수가 심한 상악 구치부에서 치조정 접근법을 이용하여 상악동 골이식술 동시 임플란트 식립)

  • Kim, Hyun-Joo;Kwon, Eun-Young;Choi, Jeomil;Lee, Ju-Youn;Joo, Ji-Young
    • Journal of Dental Rehabilitation and Applied Science
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    • v.33 no.1
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    • pp.47-54
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    • 2017
  • The atrophy of edentulous ridge and pneumatization of the maxillary sinus often limit the volume of bone available for implant placement on maxillary posterior teeth. Most clinicians suffer difficulties from poor bone quality and quantity on maxillary posterior site. Thus, the success of maxillary posterior implant surgery depends on the increase of the available bone and obtaining a good initial stability of the implant after maxillary sinus reconstruction. The maxillary sinus augmentation methods include a crestal approach and a lateral approach. Less morbidity and complications after operation is major advantage to sinus augmentation using crestal approach than lateral approach. However, when the residual ridge height is ${\geq}6mm$, it is known that crestal approach is appropriate. Also delayed implantation after sinus augmentation is recommended in severely atrophic ridge. We present the three cases of implant placement simultaneously sinus augmentation using crestal approach in posterior maxilla site with ${\leq}3mm$ of residual alveolar bone.

Prosthetic rehabilitation of an oligodontia patient with atrophic maxilla (위축된 상악골을 가진 부분무치증 환자의 보철수복)

  • Chi, Seung-Seok;Kim, Ye-Jin;Kang, Hyeon-Goo;Ko, Kyung-Ho;Huh, Yoon-Hyuk;Park, Chan-Jin;Cho, Lee-Ra
    • The Journal of Korean Academy of Prosthodontics
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    • v.59 no.2
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    • pp.238-247
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    • 2021
  • Congenital tooth agenesis is the most common developmental dental anomaly, of which oligodontia is defined as the absence of six or more permanent teeth, except the third molars. Tooth agenesis causes malocclusion, alveolar atrophy, aesthetic and psychosocial problems. This clinical report describes a multidisciplinary treatment for a patient diagnosed as oligodontia, who exhibited absence of 14 permanent teeth, atrophy of maxillary alveolar bone, and mandibular protrusion. Restoration space was secured and tooth axis was improved by the extraction of deciduous teeth and orthodontic treatment. However, edge-to-edge bite of posterior teeth and arch dimension discrepancy due to atrophic maxilla was remained. To restore the aesthetics and functionality, implant retained prosthesis was planned. Considering minimal bone grafts, location and number of dental implants and prostheses design were determined. Through the gradual adjustment of provisional restoration, the appropriate centric and eccentric occlusion was reflected into a definitive prosthesis. Currently, stable functional results were attained, however, regular follow up and maintenance care over lifetimes should be performed.

Lateral approach for maxillary sinus membrane elevation without bone materials in maxillary mucous retention cyst with immediate or delayed implant rehabilitation: case reports

  • Han, Ji-Deuk;Cho, Seong-Ho;Jang, Kuk-Won;Kim, Seong-Gwang;Kim, Jung-Han;Kim, Bok-Joo;Kim, Chul-Hun
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.43 no.4
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    • pp.276-281
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    • 2017
  • This case series study demonstrates the possibility of successful implant rehabilitation without bone augmentation in the atrophic posterior maxilla with cystic lesion in the sinus. Sinus lift without bone graft using the lateral approach was performed. In one patient, the cyst was aspirated and simultaneous implantation under local anesthesia was performed, whereas the other cyst was removed under general anesthesia, and the sinus membrane was elevated in a second process, followed by implantation. In both cases, tapered 11.5-mm-long implants were utilized. With all of the implants, good stability and appropriate bone height were achieved. The mean bone level gain was 5.73 mm; adequate bone augmentation around the implants was shown, the sinus floor was moved apically, and the cyst was no longer radiologically detected. Completion of all of the treatments required an average of 12.5 months. The present study showed that sufficient bone formation and stable implantation in a maxilla of insufficient bone volume are possible through sinus lift without bone materials. The results serve to demonstrate, moreover, that surgical treatment of mucous retention cyst can facilitate rehabilitation. These techniques can reduce the risk of complications related to bone grafts, save money, and successfully treat antral cyst.

Retrospective analysis of $frialit-2^{(R)}$ implant system placed in maxilla (상악에 식립된 Frialit-2 임플란트의 성공률에 대한 후향적 연구)

  • Chae, Gyung-Joon;Jung, Ui-Won;Kim, Chang-Sung;Shim, June-Sung;Cho, Kyoo-Sung;Kim, Chong-Kwan;Choi, Seong-Ho
    • Journal of Periodontal and Implant Science
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    • v.35 no.2
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    • pp.449-460
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    • 2005
  • Objectives Aim of this study was to evaluate the clinical use and the efficacy of Frialit-2 implant system. Experimental Methods Fifty nine patients received placement of Frilalit-2 implants(137 implants) in their maxillary anterior and posterior sites(40 and 97 implants). Intraoral & clinical examination, chart review and radiographs were taken from each patient. Results 1. The total implant survival rate was 92.7% after a mean follow-up period of 19.9 months. 2. The implant survival rate placed in anterior region was 97.5%. 3. The implant survival rate placed in posterior region was 90.7%. 4. The implant survival rate placed in atrophic posterior maxilla with advanced technique (GBR, Sinus elevation) was 87.2%. 5. The implant survival rate placed in type N(D4) bone was 82%, while 95.7% in type III (D3), and 100% in type II(D2) bone. 6. Most of the failed implants(7 of 10) were removed during the maintenance stage after prosthodontic treatment. Conclusion It was concluded that Frialit-2 implant could be used satisfactorily in the esthetic anterior region, but the use in the posterior region, especially with poor bone quality and quantity, further studies are needed.

Survival analysis of implants placed in the sinus floor elevated maxilla (상악동저 거상술 후 상악 구치부에 식립된 임플란트의 생존율에 대한 연구)

  • Park, Jong-Yeon;Kim, Ok-Su;Ryoo, Gyeong-Ho
    • Journal of Periodontal and Implant Science
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    • v.37 no.2
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    • pp.151-164
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    • 2007
  • Objective: The sinus floor elevation procedures have been used to facilitate implant placement in the severely atrophic posterior maxilla. Many variables may have an influence on the outcomes of the sinus floor elevation in combination with implant treatment. The aim of this study was to analyze survival rate of implants placed in the edentulous maxillae of patients in whom sinus floor elevation was undertaken according to variables. Materials and Methods: It consisted of 96 patients(50 male and 46 female), ranging in age from 31 to 70 years(mean 49 years), who underwent sinus floor elevation procedure(94 implants in left side and 106 implants in right side) from 2001 to 2002. A total of 200 implants were placed in the grafted sinus(73 implants in lateral approach and 127 implants in crestal approach). All implants were restored by fixed prosthesis. All patients were healthy. Follow-up periods for implants were between 48 to 60 months. Results: The cumulative survival rate of implants was 91.5%. Gender, age and operation site did not have an influence on the survival rate. There was statistically significant differences for the implants which placed in less than 4 or 5 rom residual bone height, the survival rate was 60%, 81.4% respectively (p<0.05). There was no statistically significant difference of implants survival rate ac- cording to approach technique. The survival rate for 100% autogenous bone grafts was lower with respect to composite grafts containing autogenous bone and 100% substitutes. The survival rate for hydroxyapatite-coated implants was statistically significant lower than other textured group (p<0.05). Conclusion: Residual bone height, surface texture and graft materials have an influence on the survival rate. To use autogenous bone as a part of a composite bone replacement, implant texture which leads to more favorable implant-bone interface were necessary. To determine residual bone height for initial implant stability was important.

Vertical Augmentation of Maxillary Posterior Alveolar Ridge Using Allogenic Block Bone Graft and Simultaneous Maxillary Sinus Graft

  • Lee, Eun-Young;Kim, Eun-Suk;Kim, Kyoung-Won
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.36 no.5
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    • pp.224-229
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    • 2014
  • The maxillary posterior area is the most challenging site for the dental implant. Although the sinus graft is a predictable and successful technique for rehabilitation of atrophic and pneumatized posterior maxilla, when there is severe destruction of alveolar bone, a very long crown length remains challenging after successful dental implants installation with sinus graft. We performed vertical augmentation of the maxillary posterior alveolar ridge using the allogenic block bone graft with a simultaneous sinus graft using allogenic and heterogenic bone chips. After about six months, we installed the dental implant. After this procedure, we achieved a more favorable crown-implant fixture ratio and better results clinically and biomechanically. This is a preliminary report of vertical augmentation of maxillary posterior alveolar ridge using allogenic block bone graft and simultaneous maxillary sinus graft. Further research requires longer observation and more patients.

Orthopedic and Orthodontic Treatments of a Patient with Parry-Romberg Syndrome (Parry-Romberg Syndrome 환자에서 악정형 및 교정 치료)

  • You, Kug-Ho;Baik, Hyoung-Seon
    • Korean Journal of Cleft Lip And Palate
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    • v.15 no.1
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    • pp.1-10
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    • 2012
  • Parry-Romberg syndrome(PRS) is a degenerative disease characterized by progressive hemifacial atrophy. A 10-year-old girl who had been treated for linear scleroderma at the dermatologic department visited the orthodontic department. The frontal facial photograph showed mild facial asymmetry. On the left side, mild atrophy of soft tissue, enophthalmos, cheek depression, and dry skin with dark pigmentation were observed. The radiograph showed the hypoplasia of both the maxilla and mandible on the left side. This case report describes the treatment of a patient with PRS for 7 years. To minimize the effect of progressive atrophy on the facial growth, a hybrid appliance was used. The facial photos and radiographic records were periodically taken to analyze the progression of PRS. Although it is impossible to prevent the progression of facial asymmetry, it appears to be possible to limit the atrophic effect. After the stabilization of PRS, the orthodontic treatment by the fixed appliance was performed. Additionally, autologous fat graft was performed three times at 6 month intervals. After the treatment, the patient had a confident smile and facial asymmetry was improved.

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Clinical Evaluation of Simultaneous Implants Placement Following Augmentation of the Maxillary Sinus with Deproteinized Bovine Bone (탈단백 우골을 이용한 상악동 거상술 후 즉시 임플란트 식립에 대한 임상적 평가)

  • Kim, Hyun-Kuk;Kim, Jin-Wook;Kim, Chin-Soo
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.33 no.3
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    • pp.249-255
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    • 2011
  • Purpose: Placement of endosseous implants in the atrophic maxilla is often restricted because of the lack of supporting bone. In this article, augmentation of the maxillary sinus floor with deproteinized bovine bone to enable insertion of endosseous implants is described. The technique is aimed at providing a cortical layer on top of the graft to ensure a reliable seal of the maxillary sinus and to achieve optimal stability of the bone graft in case of simultaneously placement of dental implants. Methods: The procedure was used in 200 patients (839 implants), using deproteinized bovine bone. The mean follow-up was 28.5 months. No inflammation of the bone grafts nor of the maxillary sinus occurred. The patients received implant supported overdentures or bone-anchored bridges. Results: The survival rate of implant restoration of this study was 97.6%. The total average of marginal bone loss in radiographs was $0.20{\pm}0.38$ mm. Insufficient primary stability, bony quality, and infection were thought to be associated factors in the failed cases. Conclusion: This study documented that deproteinized bovine bone, when used as a grafting material for augmentation of the sinus floor, may lead to proper osseointegration of a endosseous implant.

SINUS GRAFT AND VERTICAL AUGMENTATION OF MAXILLARY POSTERIOR ALVEOLAR RIDGE USING MANDIBULAR RAMAL BLOCK BONE GRAFT (상악동 골이식술과 하악지 자가골 블록을 이용한 상악 구치부 치조제 수직증강술)

  • Kim, Kyoung-Won;Lee, Eun-Young
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.32 no.3
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    • pp.276-281
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    • 2010
  • The maxillary posterior area is the most challenging site for the dental implant. After missing of teeth on maxillary posterior area due to periodontal problems, the remaining alveolar ridge is usually very thin because of not only pneumatization of maxillary sinus but also destruction of alveolar bone. The maxillary sinus bone graft procedure is one of the most predictable and successful treatments for the rehabilitation of atrophic and pneumatized endentulous posterior maxilla. But, in case of severe destruction of alveolar bone due to periodontal problems, very long crown length is still remaining problem after successful sinus graft procedures. We performed vertical augmentation of maxillary posterior alveolar ridge using mandibular ramal block bone graft with simultaneous sinus graft. After this procedures, we could get more favorable crown-implant ratio of final prosthodontic appliance and more satisfactory results on biomechanics. This is a preliminary report of the vertical augmentation of maxillary posterior alveolar ridge using mandibular ramal block bone graft with simultaneous sinus graft, so requires more long-term follow up and further studies.