• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제32권4호
• /
• pp.337-343
• /
• 2010

Purpose: By reviewing literature on the subject, we compared the survival rate of implants placed in various graft materials used for maxillary sinus augmentation. Materials and Methods: The search protocol used the Pubmed electronic database, with a time limit from 1998 to 2009. Keywords such as 'sinus lift,' 'sinus augmentation,' 'sinus floor elevation,' 'sinus graft,' 'bone graft,' 'implants,' 'oral implants,' and 'dental implants' were used, alone and in combination, to search the database. We selected articles and divided them into three groups by type of graft materials: Group 1. Autogenous bone group: autogenous bone alone; Group 2. Combined bone group: autogenous bone in combination with bone substitutes; and Group 3. Substitute group: bone substitutes alone or bone substitute combinations. Results: We selected 37 articles concerning a total of 2,257 patients and 7,282 implants; 417 implants failed. The total implant survival rate (ISR, %) was 94.3%. In Group 1, 761 patients and 2,644 implants were studied; 179 implants failed and the ISR was 93.2%. In Group 2, 583 patients and 1,931 implants were studied; 126 implants failed and the ISR was 93.5%. In Group 3, 823 patients and 2,707 implants were studied; 112 implants failed and the ISR was 95.9%. Conclusion: Implants inserted in grafts composed of bone substitutes alone or in grafts composed of autogenous bone in combination with bone substitutes may achieve survival rates better than those for implants using autogenous bone alone (P<0.05).

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제36권1호
• /
• pp.39-42
• /
• 2010

Maxillary sinus lift and bone graft are used to reconstruct atrophic maxilla molar area for endosseous dental implants. Many different grafting materials and techniques can be used for maxillary sinus bone graft. Bio-$Oss^{(R)}$ has been proposed as bone substitute and successfully utilized as osteoconductive filler. Platelet rich plasma (PRP) is an autologous material with many growth factors, such as PDGF, TGF-$\beta$, IGF, VEGF, facilitating bone healing process. And Platelet poor plasma (PPP) is the by-product in procedure of producing PRP. Six rabbits were used as experimental animal. Both maxillary sinus were grafted with Bio-$Oss^{(R)}$ and PRP, and Bio-$Oss^{(R)}$ and PPP. Rabbits were sacrificed at 4, 8 and 12 weeks. The grafting sites were evaluated by histomorphometric analysis. As a result, using PRP showed excellent bone formation in the early stage, but no further significant effect after that. In late stage, the ability of bone formation of using PRP was even worse than using PPP. The further studies need to be considered in this case.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제47권1호
• /
• pp.34-39
• /
• 2021

Objectives: The purpose of the study was to assess the occurrence, location, and dimensions of the intraosseous vascular canal in the lateral wall of the maxillary antrum using cone-beam computed tomography (CBCT). Materials and Methods: In this retrospective study, we examined 400 CBCT scans from our archive of patients who had earlier reported to a dental teaching hospital in the United Arab Emirates. The prevalence, location, and dimensions of the lateral antral intraosseous canal (LAIC) in the maxillary antrum were evaluated by 2 examiners using standardised methods. A third examiner was consulted in cases of disagreement. Results: The prevalence of LAIC was 62.3% (249 maxillary antra) among the study population. The mean distance between the most inferior point of the alveolar bone and the inferior border of the LAIC in the posterior maxillary region was 19.83±3.12 mm. There was a significant difference (P=0.05) between the maxillary molar and premolar regions in mean distance from the most inferior point of the alveolar bone and the inferior border of the LAIC. There was no statistically significant difference in mean distance between the most inferior point of the alveolar bone and the inferior border of the LAIC between dentulous and edentulous areas (P=0.1). The G3-intrasinusal type canal less than 1mm in diameter was the most common type of LAIC. Conclusion: This study established the approximate location of the LAIC in a United Arab Emirates cohort, which will assist the oral surgeon in selecting the appropriate site for sinus lift procedures with reduced risk of surgical hemorrhage.

• 대한치과보철학회지
• /
• 제47권2호
• /
• pp.240-246
• /
• 2009

연구목적: 이 연구는 측방접근법을 통해 상악동 골이식을 시행한 후 임플란트를 식립하였을 때, 누적 생존률 및 성별, 연령별, 이식재, 자가골의 공여부, 술전 잔존골 양, 무치악 형태, 식립 시기, 임플란트 종류, 직경과 길이에 따른 임플란트의 생존률 및 변연골의 방사선학적 결과의 차이를 분석하고자 시행되었다. 연구 재료 및 방법: 상악 구치에 측방접근법을 통해 상악동 골이식술 후 임플란트 보철치료를 시행한 71명을 대상으로 하였으며 표면 처리된 나사모양의 임플란트를 사용하였다. Osseotite(BIOMET 3i, Warsaw, USA), Neoplant(Neobiotec, Seoul, Korea), $Br\ddot{a}nemark$(Nobel Biocare, Goteberg, Sweden)과 SSII(Osstem, Busan, Korea)를 사용하였다. 최소 6개월 이상의 기간 관찰 누적 생존률은 Kaplan-Meier 분석법을 이용하였으며 다른 요소에 따른 임플란트의 생존률의 유의성은 Chi-square test로 검정하였다. 결과: 상악동골 이식술이 시행된 모든 증례에서 임플란트 식립이 가능한 골 양이 얻어졌으며 92%의 생존률을 보였다. 결론: 상악동 골이식술을 시행한 후 임플란트 보철 수복은 자가골 단독 사용시에 자가골과 골대체 물질이 혼합된 것보다 우수한 생존률을 보였다. 지연 식립하는 경우가 임플란트와 동시에 식립하는 경우보다 생존률이 높았다.

• Journal of Periodontal and Implant Science
• /
• 제38권3호
• /
• pp.445-452
• /
• 2008

Purpose: The purpose of this study was comparison of survival rate of implant as two sinus elevation techniques and when window opening procedure had done it was comparison of survival rate of implant between the procedure of implantation after 6 month of sinus elevation to allow healing period and that of implantation with sinus elevation simultaneously. Material and Methods: All 79 of patients treated at DanKook University Dental Hospital Dept. of Periodontics for 164 implantation of maxillary posterior edentulous area with sinus elevation. Sinus elevation technique was divided of the technique : Osteotome technique and window opening technique. Result: 14 implants among 96 implants was failed implants of using osteotome for sinus elevation whereas one implant of 68 implants was failed of using window opening technique. Conclusion: Window opening technique had higher survival rate than osteotome technique. In case of window opening, there was no significant difference of immediate implantation and delayed implantation.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제33권6호
• /
• pp.609-616
• /
• 2007

Purpose: The aim of the present study was to evaluate the effect of Bio-Oss on bone formation in terms of healing period and type of membrane so that determine the most suitable condition for implant fixation in grafted maxilla. Material & Method: Forty-five biopsy specimens from graft site were evaluated. Sinus lift was performed in the patients with reduced alveolar bone height(less than 5mm). The specimen was taken at the time of implant fixation, which was performed at least 5 months after the sinus lift procedure. All specimens were stained with H&E and Trichrome staining and evaluated histomorphometrically. Result: The results showed that Bio-Oss particle was in direct contact with newly formed bone in all cases. In the present study, the amount of newly formed bone and the residual bone substitute material were not statistically different according to various membrane and different healing period. There was no difference between the histological feature of the specimen of 5 and 31 months. No statistical significance was detected between male and female. Conclusion: The result implies that Bio-Oss does not seem to be resorbed over time regardless of the type of the membranes. The further investigation is needed to clarify this issue with the extended period of follow-up.

• Journal of Korean Dental Science
• /
• 제3권1호
• /
• pp.25-31
• /
• 2010

This study sought to evaluate the effect of the type of grafts used in sinus lifting. A review of literature through MEDLINE search covering the period 1980 ~ 2006 was performed. After screening, this study was narrowed down to 2,452 patients receiving sinus lift grafts wherein 7,151 implants were placed. In this study, the types of grafts used in sinus augmentation were autogenous bone, allogenic bone, corticocancellous block bone, and various alloplastic materials. The success rate varied from 69% to 100% depending on the graft material type. The highest success rate was reported for the autogenous bone, with high success rates recorded for the most part in most studies.

• Imaging Science in Dentistry
• /
• 제50권2호
• /
• pp.93-98
• /
• 2020

Purpose: Little is known regarding the accuracy of clinical magnetic resonance imaging (MRI) protocols with acceptable scan times in sinus graft assessment. The aim of this study was to evaluate the correlations between MRI and cone-beam computed tomographic (CBCT) measurements of maxillary sinus grafts using 2 different clinical MRI imaging protocols. Materials and Methods: A total of 15 patients who underwent unilateral sinus lift surgery with biphasic calcium phosphate were included in this study. CBCT, T1-weighted MRI, and T2-weighted MRI scans were taken 6 months after sinus lift surgery. Linear measurements of the maximum height and buccolingual width in coronal images, as well as the maximum anteroposterior depth in sagittal images, were performed by 2 trained observers using CBCT and MRI Digital Imaging and Communication in Medicine files. Micro-computed tomography (micro-CT) was also performed to confirm the presence of bone tissue in the grafted area. Correlations between MRI and CBCT measurements were assessed with the Pearson test. Results: Significant correlations between CBCT and MRI were found for sinus graft height (T1-weighted, r=0.711 and P<0.05; T2-weighted, r=0.713 and P<0.05), buccolingual width (T1-weighted, r=0.892 and P<0.05; T2-weighted, r=0.956 and P<0.05), and anteroposterior depth (T1-weighted, r=0.731 and P<0.05; T2-weighted, r=0.873 and P<0.05). The presence of bone tissue in the grafted areas was confirmed via micro-CT. Conclusion: Both MRI pulse sequences tested can be used for sinus graft measurements, as strong correlations with CBCT were found. However, correlations between T2-weighted MRI and CBCT were slightly higher than those between T1-weighted MRI and CBCT.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제36권2호
• /
• pp.87-93
• /
• 2010

Introduction: In our previous studies, we isolated porcine skin-derived mesenchymal stem cells (pSDMSCs) from the ears of adult miniature pigs and evaluated the pluripotency of these pSDMSCs based on expressions of transcription factors, such as Oct-4, Sox-2, and Nanog. Moreover, the characteristic of mesenchymal stem cells was revealed by the expression of various mesenchymal stem cell markers, including CD29, CD44, CD90, and vimentin. The aim of this study was to evaluate in vivo osteogenesis after maxillary sinus lift procedures with autogenous pSDMSCs and scaffold. Materials and Methods: The autogenous pSDMSCs were isolated from the 4 miniature pigs, and cultured to 3rd passage with same methods of our previous studies. After cell membranes were labeled using a PKH26, $1{\times}10^{7}$ cells/$100{\mu}L$ of autogenous pSDMSCs were grafted into the maxillary sinus with a demineralized bone matrix (DBM) and fibrin glue scaffold. In the contralateral control side, only a scaffold was grafted, without SDMSCs. After two animals each were euthanized at 2 and 4 weeks after grafting, the in vivo osteogenesis was evaluated with histolomorphometric and osteocalcin immunohistochemical studies. Results: In vivo PKH26 expression was detected in all specimens at 2 and 4 weeks after grafting. Trabecular bone formation and osteocalcin expression were more pronounced around the grafted materials in the autogenous pSDMSCs-grafted group compared to the control group. Newly generated bone was observed growing from the periphery to the center of the grafted material. Conclusion: The results of the present study suggest that autogenous skin-derived mesenchymal stem cells grafting with a DBM and fibrin glue scaffold can be a predictable method in the maxillary sinus floor elevation technique for implant surgery.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제33권3호
• /
• pp.281-285
• /
• 2011

Sinus floor elevation is a predictable and standard procedure for the treatment of the posterior maxilla before insertion of dental implants. Although overall complication rates are low, complications can occur including sinus membrane perforation, infection of sinus, swelling and hemorrhage. The most common complication is membrane perforation. Recently, various techniques and materials for repair of perforation to the sinus membrane have been proposed. The purpose of this article is to report on various techniques and materials that can be used for repair of perforations to the sinus membrane. The search protocol used was the following electronic database: Pubmed, with a time limit from 1998 to 2009. The key words such as 'sinus lift', 'sinus augmentation', 'sinus floor elevation', 'sinus graft', 'sinus perforation', 'repair of sinus perforation' and 'repair of sinus membrane' were used, alone and in combination, when searching the database. Various techniques have been proposed to manage of perforation of sinus membranes. These include that the use of collagen membranes, demineralized freeze-dried human lamellar bone sheets, processed human allografts, lamella bone, buccal fat pads and suturing. Implant success rate ranges from 69.9% to 98.9%.