Maxillofacial Plastic and Reconstructive Surgery最新文献

{"title":"Total mandible and bilateral TMJ reconstruction combining a customized jaw implant with a free fibular flap: a case report and literature review.","authors":"Flavio Andrea Govoni,&nbsp;Nicola Felici,&nbsp;Matteo Ornelli,&nbsp;Vincenzo Antonio Marcelli,&nbsp;Emilia Migliano,&nbsp;Bruno Andrea Pesucci,&nbsp;Roberto Pistilli","doi":"10.1186/s40902-023-00374-w","DOIUrl":"https://doi.org/10.1186/s40902-023-00374-w","url":null,"abstract":"<p><strong>Background: </strong>The need for whole mandibular bone reconstruction and bilateral joint replacement is fortunately rare, but it is an extremely challenging topic in maxillofacial surgery, due to its functional implications. CAD-CAM techniques development has opened new broad horizons in the surgical planning of complex maxillofacial reconstructions, in terms of accuracy, predictability, and functional cosmetic results. The review of the literature has revealed a small number of scientific reports on total mandibulectomy including the condyles, with only eleven cases from 1980. Most of the works describe reconstructions secondary to dysplastic or inflammatory diseases affecting the lower jaw. The aim of this work, reporting a rare case of massive fibrous dysplasia of the whole mandible, is to share our experience in the management of extended mandibular and bilateral joint reconstruction, using porous titanium patient-specific implants.</p><p><strong>Case presentation: </strong>The authors present a 20-year-old male patient suffering from massive bone fibrous dysplasia of the mandible. The mandibular body and both the rami and the condylar processes had been involved, causing severe functional impairment, tooth loss, and facial deformation. The young patient, after repeated ineffective conservative surgical treatments, has required a biarticular mandibular replacement. Using virtual surgical planning (VSP) software, the authors, in collaboration with medical engineers, have created a custom-made original titanium porous mandibular implant, suspended from a bilateral artificial temporomandibular joint. The mandibular titanium implant body has been specifically designed to support soft tissues and to fix, in the alveolar region, a free fibular bone graft, for delayed dental implant prosthetic rehabilitation.</p><p><strong>Conclusion: </strong>The surgical and technical details, as well as the new trends in mandibular reconstructions using porous titanium implants, are reported, and discussed, reviewing literature reports on this topic. Satisfactory functional and cosmetic restorative results have been obtained, and no major complications have occurred. The patient, currently in the 18^th month clinical and radiological follow-up, has recently completed the functional restoration program by an implant-supported full-arch dental prosthesis.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"45 1","pages":"6"},"PeriodicalIF":2.3,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9871153/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10619383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A three-dimensional investigation of mandibular deviation in patients with mandibular prognathism.","authors":"Kazuaki Osawa, Jun Nihara, Hideyoshi Nishiyama, Kojiro Takahashi, Ayako Honda, Chihiro Atarashi, Ritsuo Takagi, Tadaharu Kobayashi, Isao Saito","doi":"10.1186/s40902-023-00372-y","DOIUrl":"10.1186/s40902-023-00372-y","url":null,"abstract":"<p><strong>Background: </strong>Craniofacial disharmony in cases of jaw deformity associated with abnormal lateral deviation of the jaw mostly involves both the maxilla and mandible. However, it has been still difficult to capture the jaw deviation aspect in a 3-dimensional and quantitative techniques. In this study, we focused on 3-dimensional mandibular morphology and position of the condylar head in relation to the base of the skull in patients with mandibular prognathism, one of the most common jaw deformities. We used cluster analysis to quantify and classify deviation and clarified its characteristics. We also investigated the degree of correlation between those findings and menton (Me) deviation measured on frontal cephalograms, which is a conventional indicator of jaw deformity.</p><p><strong>Results: </strong>Findings obtained from 100 patients (35 men, 65 women) were classified into the following three groups based on mandibular morphology and condylar position relative to the skull base. Then, reclassification using these parameters enabled classification of cluster analysis findings into seven groups based on abnormal jaw deviation characteristics. Comparison among these seven groups showed that the classification criteria were ramus height, mandibular body length, distance from the gonion to the apex of the coronoid process, and the lateral and vertical positions of the mandible. Weak correlation was also found between Me deviation on frontal cephalograms and each of the above parameters measured on 3D images.</p><p><strong>Conclusions: </strong>Focusing on mandibular morphology and condylar position relative to the skull base in patients with mandibular prognathism, we used cluster analysis to quantify and classify jaw deviation. The present results showed that the 3D characteristics of the mandible based on mandibular morphology and condylar position relative to the skull base can be classified into seven groups. Further, we clarified that Me deviation on frontal cephalograms, which has been used to date, is inadequate for capturing jaw deviation characteristics.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"45 1","pages":"4"},"PeriodicalIF":2.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9859975/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10574470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methodology: workflow for virtual reposition of mandibular condyle fractures.","authors":"Jan Matschke,&nbsp;Adrian Franke,&nbsp;Olufunmi Franke,&nbsp;Christian Bräuer,&nbsp;Henry Leonhardt","doi":"10.1186/s40902-023-00373-x","DOIUrl":"https://doi.org/10.1186/s40902-023-00373-x","url":null,"abstract":"<p><strong>Background: </strong>Even though mandibular condyle fractures have a high clinical relevance, their treatment remains somewhat challenging. Open reduction and internal fixation are difficult due to narrow surgical approaches, poor overview during reduction, and a possible risk of facial nerve damage. In times of technical endeavors in surgery, there is a trend towards the usage of stable CAD-CAM-implants from additive manufacturing or titanium laser sintering. Up until now, there have not been any reports of fracture treatment of the mandibular condyle using this technique.</p><p><strong>Results and conclusion: </strong>We present a workflow for virtual repositioning of the fractured mandibular condyle, to manufacture patient-specific implants for osteosynthesis with the intention of use of resorbable metal alloys in the future.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"45 1","pages":"5"},"PeriodicalIF":2.3,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9859969/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9126114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of surgical factors on the outcomes of zygoma reduction malarplasty: a quantitative computed tomography study.","authors":"Jong Chul Park","doi":"10.1186/s40902-023-00371-z","DOIUrl":"https://doi.org/10.1186/s40902-023-00371-z","url":null,"abstract":"<p><strong>Background: </strong>Malarplasty is widely performed for zygoma reduction. The effects of body segmentation, plate bending, and postoperative arch location on zygomatic movement have not been analyzed using computed tomography (CT).</p><p><strong>Results: </strong>We quantitatively analyzed the effects of surgical factors on zygomatic movements via superimposition of preoperative and postoperative CT images using three-dimensional software. Our results showed that segmentation had the most significant effect on the horizontal reduction of malar eminence (β = 0.593, r = 0.696, adjusted r² = 0.479, F = 79.595; p < 0.001). In addition, upward and posterior arch movements had significant effects on the anterior and posterior movements of the eminence (β = - 0.379 for vertical arch movement, β = 0.324 for arch setback, r = 0.603, adjusted r² = 0.352, F = 31.943; p < 0.001). The major factors that influenced inward arch movement at the coronoid process included segmentation and inward movement at the arch osteotomy site. To prevent interference of the coronoid process and arch, surgeons should pay attention to the degree of segmentation (β = 0.349) and inward movement at the arch osteotomy site (β = 0.494; r = 0.688, adjusted r² = 0.464, F = 50.412; p < 0.001).</p><p><strong>Conclusions: </strong>Surgical factors related to malarplasty affect the movement of specific parts of the zygoma. In addition, accurate application is possible by considering the anatomical structure of the application area when using the bending plate.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"45 1","pages":"3"},"PeriodicalIF":2.3,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826774/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10505739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The optimal scaffold for silk sericin-based bone graft: collagen versus gelatin.","authors":"Ji Hae Lee,&nbsp;HaeYong Kweon,&nbsp;Ji-Hyeon Oh,&nbsp;Seong-Gon Kim","doi":"10.1186/s40902-022-00368-0","DOIUrl":"https://doi.org/10.1186/s40902-022-00368-0","url":null,"abstract":"<p><strong>Background: </strong>Silk sericin is an active ingredient in bone grafts. However, the optimal scaffold for silk sericin has yet to be identified.</p><p><strong>Method: </strong>A critical-sized bone defect model in rat calvaria was used to evaluate bone regeneration. Silk sericin from Yeonnokjam, Bombyx mori, was incorporated into gelatin (group G, n = 6) and collagen (group C, n = 6). Bone regeneration was evaluated using micro-computed tomography (mCT) and histology.</p><p><strong>Results: </strong>Group C showed a larger bone volume than group G in the mCT analysis (P = 0.001). Histological analysis showed a larger area of bony defects in group G than in group C. The bone regeneration area in group C was significantly larger than that in group G (P = 0.003).</p><p><strong>Conclusion: </strong>Compared with gelatin, collagen shows better bone regeneration in silk sericin-based bone grafts.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"45 1","pages":"2"},"PeriodicalIF":2.3,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826769/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10505741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mixed reality for extraction of maxillary mesiodens.","authors":"Yu Koyama,&nbsp;Keisuke Sugahara,&nbsp;Masahide Koyachi,&nbsp;Kotaro Tachizawa,&nbsp;Akira Iwasaki,&nbsp;Ichiro Wakita,&nbsp;Akihiro Nishiyama,&nbsp;Satoru Matsunaga,&nbsp;Akira Katakura","doi":"10.1186/s40902-022-00370-6","DOIUrl":"https://doi.org/10.1186/s40902-022-00370-6","url":null,"abstract":"<p><strong>Background: </strong>Mesiodentes are the most common supernumerary teeth. The cause is not fully understood, although proliferations of genetic factors and the dental lamina have been implicated. Mesiodentes can cause delayed or ectopic eruption of permanent incisors, which can further alter occlusion and appearance. Careful attention should be paid to the position and direction of the mesiodentes because of possible damage to adjacent roots in the permanent dentition period, errant extraction in the deciduous and mixed dentition periods, and damage to the permanent tooth embryo. To avoid these complications, we applied mixed reality (MR) technology using the HoloLens® (Microsoft, California). In this study, we report on three cases of mesiodentes extraction under general anesthesia using MR technology.</p><p><strong>Results: </strong>The patients ranged in age from 6 to 11 years, all three were boys, and the direction of eruption was inverted in all cases. The extraction approach was palatal in two cases and labial in one case. The average operative time was 32 min, and bleeding was minimal in all cases. No intraoperative or postoperative complications occurred. An image was shared preoperatively with all the surgeons using an actual situation model. Three surgeons used Microsoft HoloLens® during surgery, shared MR, and operated while superimposing the application image in the surgical field.</p><p><strong>Conclusions: </strong>The procedure was performed safely; further development of MR surgery support systems in the future is suggested.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"45 1","pages":"1"},"PeriodicalIF":2.3,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9816364/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10559228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bilateral cleft lip repair by new trending method: a case report.","authors":"Ji-Yeon Kang","doi":"10.1186/s40902-022-00367-1","DOIUrl":"https://doi.org/10.1186/s40902-022-00367-1","url":null,"abstract":"<p><strong>Background: </strong>Bilateral cleft lip repair is one of the most difficult surgeries, and many techniques have been modified and developed to improve surgical outcomes. The current trend is toward preserving tissue as much as possible. When the reconstruction is based on the shape of the patient's own tissue, the most natural appearance is produced, and the relaxed remaining tissue can be benefitted from reducing tension and minimizing scarring.</p><p><strong>Case presentation: </strong>In the conventional surgical method, the rest of the prolabium is sacrificed, except for the tissue used to make the philtrum. We used all tissues for surgery and did not discard any. The tubercle of the median vermilion was used in its original form.</p><p><strong>Conclusions: </strong>It is fundamental to restore function in cleft lip surgery. Both patients and surgeons have a desire for esthetic outcomes that go beyond function. In addition, the measure of the success of the surgery is the postoperative resemblance to normal midfacial features. Unlike the conventional method of making tubercles by collecting lateral vermilion flaps, we preserved the tissue of the prolabium. Rather than using an artificial tubercle, we were able to create a more natural shape of the upper lip using the patient's own anatomical structure. In addition, the remaining tissues of the discarded prolabium were used to make the oral mucosa, which may help to reduce tension compared to the conventional method. The modified repair method is expected to gradually become the mainstream method owing to its superior esthetic outcome and less surgical difficulty compared with traditional methods.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"44 1","pages":"38"},"PeriodicalIF":2.3,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9748006/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10361468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reconstruction of mandibular defects in osteoradionecrosis and medication-related osteonecrosis of the jaw using fibula free flap and management of postoperative wound infections.","authors":"Hyemin Oh,&nbsp;Dohyun Kwon,&nbsp;Jaemyung Ahn,&nbsp;Jun-Young Paeng","doi":"10.1186/s40902-022-00366-2","DOIUrl":"https://doi.org/10.1186/s40902-022-00366-2","url":null,"abstract":"<p><strong>Background: </strong>Complications from osteoradionecrosis (ORN) and medication-related osteonecrosis of the jaw (MRONJ) include oro-cutaneous fistulas, necrotic bone exposure, soft-tissue defects, and pathologic fractures. The fibula free flap (FFF) is a common free flap method used to reconstruct the mandible in severe cases. Recently, we have used the FFF successfully for the reconstruction of ORN and MRONJ mandibular defects. We report this method as a recommended technique for the treatment of ORN and MRONJ and the management method of postoperative infections.</p><p><strong>Methods: </strong>Four patients who were diagnosed with ORN of the mandible and 3 patients who were diagnosed with MRONJ of the mandible were included in the study. Among the 7 patients, 3 patients also had pathologic fractures. Partial mandibulectomy and FFF reconstruction were performed at the Department of Oral and Maxillofacial Surgery, Samsung Medical Center from April 2019 to March 2021.</p><p><strong>Results: </strong>All 7 patients recovered following the reconstruction of the defect by FFF. Four patients experienced infections after surgery and pus cultures were performed. All were well healed without flap damage after changing the antibiotics by consultation with infectious medicine experts.</p><p><strong>Conclusion: </strong>FFF is a widely used method and can provide an extensive flap to reconstruct the mandible, especially those affected by ORN or MRONJ. If an infection occurs after surgery, appropriate antibiotic changes should be made through cooperation with the infectious medicine department. Therefore, FFF is a well-established and recommended method even in cases of challenging reconstruction.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"44 1","pages":"37"},"PeriodicalIF":2.3,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9733773/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10378535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surgical ciliated cyst of the mandible after orthognathic surgery: a case report with review of the literature.","authors":"Sungbin Youn,&nbsp;Hyun Jun Oh,&nbsp;Hye-Jung Yoon,&nbsp;Byoung-Moo Seo","doi":"10.1186/s40902-022-00356-4","DOIUrl":"https://doi.org/10.1186/s40902-022-00356-4","url":null,"abstract":"<p><strong>Background: </strong>Surgical ciliated cysts, also known as postoperative maxillary cysts or implantation cysts, occur mainly in the posterior maxilla after radical maxillary sinus surgery; they rarely develop in the mandible. They are thought to occur when the sinonasal epithelium is infiltrated by a surgical instrument during surgery or as a result of transplantation of bone or cartilage with respiratory epithelium attached.</p><p><strong>Case presentation: </strong>We report a case in which a surgical ciliated cyst developed in the anterior part of the mandible, presumably as a result of bimaxillary orthognathic surgery and genioplasty performed 24 years earlier. We then review the few similar cases reported in the literature.</p><p><strong>Conclusion: </strong>Surgical ciliated cysts in the mandible are extremely rare, but they could occur after simultaneous surgery on the maxilla and mandible, even decades later. To prevent surgical ciliated cysts in the mandible, we recommend that the surgical instruments, especially the saw blade used during bimaxillary surgery, be new or cleaned and that previously placed plates and screws be removed at an appropriate time.</p>","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"44 1","pages":"26"},"PeriodicalIF":2.3,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9339441/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9545888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in the pharyngeal airway after different orthognathic procedures for correction of class III dysplasia","authors":"Khaghaninejad, Mohammad Saleh, Khojastehpour, Leila, Danesteh, Hossein, Changizi, Mehdi, Ahrari, Farzaneh","doi":"10.1186/s40902-022-00352-8","DOIUrl":"https://doi.org/10.1186/s40902-022-00352-8","url":null,"abstract":"This study was conducted to compare changes in pharyngeal airway after different orthognathic procedures in subjects with class III deformity. The study included CBCT scans of 48 skeletal class III patients (29 females and 19 males, mean age 23.50 years) who underwent orthognathic surgery in conjunction with orthodontic treatment. The participants were divided into three groups of 16, as follows: Group 1, mandibular setback surgery; group 2, combined mandibular setback and maxillary advancement surgery; and group 3, maxillary advancement surgery. CBCT images were taken 1 day before surgery (T0), 1 day (T1), and 6 months (T2) later. The dimensions of the velopharynx, oropharynx, and hypopharynx were measured in CBCT images. In all groups, there was a significant decrease in airway variables immediately after surgery, with a significant reversal 6 months later (P < 0.05). In subjects who underwent maxillary advancement, the airway dimensions were significantly greater at T2 than the T0 time point (P < 0.05), whereas in the mandibular setback and bimaxillary surgery groups, the T2 values were lower than the baseline examination (P < 0.05). The alterations in airway variables were significantly different between the study groups (P < 0.05). The mandibular setback procedure caused the greatest reduction in the pharyngeal airway, followed by the bimaxillary surgery and maxillary advancement groups, with the latter exhibiting an actual increase in the pharyngeal airway dimensions. It is recommended to prefer a two-jaw operation instead of a mandibular setback alone for correction of the prognathic mandible in subjects with predisposing factors to the development of sleep-disordered breathing.","PeriodicalId":18357,"journal":{"name":"Maxillofacial Plastic and Reconstructive Surgery","volume":"57 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138517041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}