ABSTRACT
Objective@#To examine the accuracy of computer-aided intraoperative navigation (Ci-Navi) in bimaxillary orthognathic surgery by comparing preoperative planning and postoperative outcome. @*Methods@#The study comprised 45 patients with congenital dentomaxillofacial deformities who were scheduled to undergo bimaxillary orthognathic surgery. Virtual bimaxillary orthognathic surgery was simulated using Mimics software. Intraoperatively, a Le Fort I osteotomy of the maxilla was performed using osteotomy guide plates. After the Le Fort I osteotomy and bilateral sagittal split ramus osteotomy of the mandible, the mobilized maxilla and the distal mandibular segment were fixed using an occlusal splint, forming the maxillomandibular complex (MMC). Realtime Ci-Navi was used to lead the MMC in the designated direction. Osteoplasty of the inferior border of the mandible was performed using Ci-Navi when facial symmetry and skeletal harmony were of concern. Linear and angular distinctions between preoperative planning and postoperative outcomes were calculated. @*Results@#The mean linear difference was 0.79 mm (maxilla: 0.62 mm, mandible: 0.88 mm) and the overall mean angular difference was 1.20°. The observed difference in the upper incisor point to the Frankfort horizontal plane, midfacial sagittal plane, and coronal plane was < 1 mm in 40 cases. @*Conclusions@#This study demonstrates the role of Ci-Navi in the accurate positioning of bone segments during bimaxillary orthognathic surgery. Ci-Navi was found to be a reliable method for the accurate transfer of the surgical plan during an operation.
ABSTRACT
Objective@#To examine the accuracy of computer-aided intraoperative navigation (Ci-Navi) in bimaxillary orthognathic surgery by comparing preoperative planning and postoperative outcome. @*Methods@#The study comprised 45 patients with congenital dentomaxillofacial deformities who were scheduled to undergo bimaxillary orthognathic surgery. Virtual bimaxillary orthognathic surgery was simulated using Mimics software. Intraoperatively, a Le Fort I osteotomy of the maxilla was performed using osteotomy guide plates. After the Le Fort I osteotomy and bilateral sagittal split ramus osteotomy of the mandible, the mobilized maxilla and the distal mandibular segment were fixed using an occlusal splint, forming the maxillomandibular complex (MMC). Realtime Ci-Navi was used to lead the MMC in the designated direction. Osteoplasty of the inferior border of the mandible was performed using Ci-Navi when facial symmetry and skeletal harmony were of concern. Linear and angular distinctions between preoperative planning and postoperative outcomes were calculated. @*Results@#The mean linear difference was 0.79 mm (maxilla: 0.62 mm, mandible: 0.88 mm) and the overall mean angular difference was 1.20°. The observed difference in the upper incisor point to the Frankfort horizontal plane, midfacial sagittal plane, and coronal plane was < 1 mm in 40 cases. @*Conclusions@#This study demonstrates the role of Ci-Navi in the accurate positioning of bone segments during bimaxillary orthognathic surgery. Ci-Navi was found to be a reliable method for the accurate transfer of the surgical plan during an operation.
ABSTRACT
@#Background: Previous studies showed controversial findings for correlation of periodontal disease and cognitive deficits. Methods: We searched systematically for studies pertaining to correlation of periodontal disease and cognitive deficits published between August 1980 and December 2019 on Web of Science and PubMed. We combined the data extracted from the included studies to determine the correlation between periodontal disease and cognitive deficits. Results: Our analysis indicated a higher risk of cognitive deficits in those with moderate to severe periodontal disease when compared to those with mild or no periodontal disease (odds ratio (OR) = 1.38 (95% confidence intervals (CI): 1.28-1.48). Subgroup analysis showed significant correlations in only case-control and cohort studies (case-control studies: OR = 1.49 (95% CI: 1.24-1.80); cohort studies: relative risk (RR) = 1.33 (95% CI: 1.22-1.45)). Subgroup analysis also indicated that moderate to severe periodontal disease was correlated to increased dementia and Alzheimer disease risks, whereas no significant correlation was found between periodontal disease and mild cognitive impairment (dementia: OR/RRs = 1.32 (95% CI: 1.22-1.44); Alzheimer disease: OR/RRs = 1.51 (95% CI: 1.20-1.90); Mild cognitive impairment: OR/RRs = 1.31 (95% CI: 0.89-1.94)). Furthermore, subgroup analysis showed significant correlations between cognitive deficits and tooth loss, periodontitis, whereas no significant correlation was found between deep periodontal pockets and cognitive deficits (tooth loss: OR/RRs = 1.57 (95% CI: 1.39- 1.77); periodontitis: OR/RRs = 1.43 (95% CI: 1.03-2.00); deep periodontal pockets: OR/RRs = 1.24 (95% CI: 0.77-2.00)). Conclusions: This review suggests a significant correlation between periodontal disease and cognitive deficits. Interventional studies for periodontal disease may be beneficial for patients with cognitive deficits
ABSTRACT
Objective To explore and analyze the effect of ambroxol hydrochloride combined with budesonide in treatment of children bronchial pneumonia on C-reactive protein level and WBC levels.Methods 100 cases of patients with bronchial pneumonia treated in our hospital from May 2015 to December 2016, were randomly divided into observation group and control group, 50 cases in each group.The control group were given routine treatment, while the observation group were given ambroxol hydrochloride combined with budesonide treatment on the basis of the control group,the course of treatment was 14 days.C-reactive protein and WBC levels were measured before treatment and 14 days after treatment, the Resultswere observed and statistical.ResultsThere were significant differences in the content of CRP between groups and multiple time points(F=11.50, P=0.003;F=4.78, P=0.03;F=5.45, P=0.02).The content of CRP 14 days after treatment in the observation group were significantly lower than the control group(t=14.12,P<0.05), the difference was statistically significant.There were significant differences in the WBC counts between groups and multiple time points(F=11.52, P=0.003;F=4.73, P=0.03;F=5.44, P=0.02),the difference was statistically significant.The count of WBC 14 days after treatment in the observation group after treatment were significantly lower than the control group(t=8.12, P<0.05), the difference was statistically significant.The number of cured, effective and ineffective cases in the control group was 20, 13 and 15, respectively.The observation group was 30, 15, and 5 cases, respectively.By rank sum test, the difference of the effective rate between the 2 groups was statistically significant(u=2.33, P<0.05).And the total effective rate in observation group was 90.0%, which was significantly higher than the control group(70.0%)(x2=6.25, P<0.05), the difference was statistically significant.Conclusion Ambroxol hydrochloride combined with budesonide in the treatment of bronchial pneumonia in children is effective and can effectively reduce the CRP and WBC count, so it is worth popularizing widely in clinic.
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To compare vertical changes occurring in Class I patients after orthodontic treatment with different extraction patterns in a retrospective study. Records of 47 patients with extraction of maxillary first premolars and mandibular second premolars [4/5, Group A] and 46 patients with extraction of fourth first premolars [4/4, Group B] were obtained in the Orthodontic Department, West China Hospital of Stomatology, Chengdu, Sichuan, China from April 2008 to July 2012. Pretreatment and posttreatment cephalograms were digitized, 8 skeletal and 10 dental cephalometric measurements were selected to evaluate vertical changes. Changes of measurements resulting from orthodontic treatment in each group were compared by paired t-test; changes between 2 groups were compared by Independent t-test. Before treatment, subjects in Group A showed larger angle formed by the intersection of NA and NB lines, overjet, and overbite than those in Group B. After treatment, both groups showed significant vertical changes after orthodontic treatment without remarkable differences between groups. No differences of vertical change were found between the 2 extraction patterns. The hypothesized wedge effects due to mesial movement of posterior teeth might be balanced by the extrusion of posterior teeth as well as the residual growth potentials