Tooth autotransplantation is a restoration technology that grafts the patient's own teeth to the missing tooth area, usually by using the third molar to replace a nonnormally functioning molar for the purpose of "turning waste into treasure". Robotic surgical assistance has been widely used in the fields of breast cancer, liver cancer, and orthopedics; however, its application in the dental field, particularly in tooth autotransplantation, remains relatively rare. This paper reports a case of tooth autotransplantation with the assistance of a domestic autonomous oral surgery robot, providing a reference for the application of robotic surgery assistance in tooth autotransplantation.
Humans ; Molar, Third/transplantation* ; Robotic Surgical Procedures/methods* ; Transplantation, Autologous

Objective To evaluate and improve missing data imputation methods to enhance the performance of binary classification prediction model.Methods By simulating data missing scenes,the effects of direct elimination,mean imputation,random forest(RF)imputation algorithm,and multiple imputation-random forest(MI-RF)on the performance of the prediction model were jointly evaluated by receiver operating characteristic area under curve(AUC)and root mean square error(RMSE).Bayesian Network was introduced for the random forest imputation algorithm to optimize the imputation method using the correlations between variables.Results Under different missing proportions,both AUC and RMSE indicated that Bayesian network optimized random forest(BN-RF)imputation algorithm was better.In addition,when the missing proportion was 10％-20％,various imputation methods had roughly the same improvement effect for the prediction model;when the proportion of missing data was 30％-40％,compared to the mean imputation,except for the BN-RF,RF was more effective and its effect was slightly better than MI-RF;however,when the proportion of missing data was close to 50％,even if the model performance was still appropriate,the imputation data gradually deviated from the true data features,resulting in a decrease in the usability of the model.Conclusion The overall effect of BN-RF is satisfactory,and it should be chosen when random missing was 30％-40％.

Objective To compare the image quality of readout-segmented diffusion weighted imaging(RESOLVE-DWI)and integrated slice-by-slice shimming diffusion weighted imaging(iShim-DWI)in patients with nasopharyngeal carcinoma.Methods A retrospective study was conducted on 26 patients with nasopharyngeal carcinoma confirmed by pathology.The imaging data included RESOLVE-DWI and iShim-DWI.The signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of the two sequences were compared by one deputy chief imaging technician.And two experienced radiologists used the 5-point scoring scheme to compare the lesion clarity,image artifacts,and antideformation ability of the two sequences,repectively.Results The SNR and CNR of the iShim-DWI sequence were significantly higher than those of RESOLVE-DWI sequence(P＜0.01).While the subjective scores of lesion clarity,image artifacts,and antideformation ability on RESOLVE-DWI were significantly better than those of iShim-DWI,and the differences were statistically significant(P＜0.01).Conclusion Both RESOLVE-DWI and iShim-DWI obtained good images.With sufficient SNR and CNR,RESOLVE-DWI has clearer lesions and surrounding structures,higher image resolution,fewer artifacts,and better antideformation ability,thus providing clinical advantages in evaluating patients with good physical tolerance.

Objective Exploring the clinical efficacy of using autologous rib cartilage grafting to reconstruct finger hemiarticular defects.Methods From August 2022 to February 2024,for 6 patients with hemiarticular surface defects in the metacarpophalangeal joints and interphalangeal joints of 8 fingers,costal cartilage was used for joint remodeling and transplantation to reconstruct the hemiarticular surface defects of the fingers.All 8 joint transplants in 6 patients were two-stage surgeries.In the first stage,antibiotic bone cement was used to fill the space-occupying lesions,and in the second stage,costal cartilage joint remodeling was performed to reconstruct the finger joint defects.Postoperative follow-up and assessment of fracture healing according to Paley fracture healing scoring criteria.Outpatient and WeChat follow-up,upper limb function is evaluated according to the upper limb functional assessment standards of the Chinese Medical Association Hand Surgery Society.Record VAS pain score.Results In this group,there were a total of 6 patients with 8 cases of hemiarticular defects.Among them,2 patients had two joint surgical sites,while the remaining 4 patients had a single joint surgical site.There were 2 cases of metacarpophalangeal joint head defects,2 cases of proximal articular surface defects,3 cases of proximal articular head defects,and 1 case of thumb proximal articular head defect.After surgery,8 out of 6 patients'hand wounds healed successfully.All patients were followed up for 6-12 months postoperatively,with an average of 9 months.The VAS pain score(affected finger)for the last follow-up was 0-2 points,with an average of 0.6 points.According to Paley's scoring criteria,all 6 patients had excellent fracture healing.According to the evaluation criteria for upper limb functional assessment of the Chinese Medical Association Hand Surgery Society,3 cases were rated as excellent,3 cases were rated as good,and 2 cases were rated as fair.Conclusion For patients with half joint defects on one side of the finger,rib rib cartilage was used for joint reconstruction,which significantly improved the joint shape and function at the defect site,and reduced joint pain scores.

Objective:To evaluate the safety and efficacy of mild hypothermia arch-clamping technique in the surgical treatment of DeBakey Type Ⅰ aortic dissection.Methods:From December 2019 to November 2023, a total of 97 patients with DeBakey type Ⅰ aortic dissection who underwent arch-clamping technique in Beijing Anzhen Hospital were prospectively enrolled. The patients were divided into mild hypothermia group and moderate hypothermia group according to the lowest rectal temperature during the circulatory arrest period. The perioperative data of the two groups were compared, and complex adverse outcomes consisting of 30-day death, stroke, paraplegia and CRRT were used as the primary endpoint. Multivariate logistic regression was used to determine the predictors of clinical adverse outcomes. Survival analysis was evaluated by the Kaplan- Meier method. Results:The overall incidence of complex adverse outcomes was 20.6%, 13.6% in the mild hypothermia group and 22.7% in the moderate hypothermia group( P=0.535), and the incidence of stroke was 4.6% and 6.7%( P=1.000), respectively. The cardiopulmonary bypass time and aortic-clamping time in the mild hypothermia group were significantly shortened (147.5 min vs. 163.0 min, P=0.032; 89 min vs. 99 min, P=0.042). There was no significant difference in long-term survival and reintervention between the two groups(91.9% vs. 89.3%, P=0.87; 9.1% vs. 5.3%, P=0.13). Conclusion:Mild hypothermia arch-clamping technique is a safe and effective method for the treatment of DeBakey type Ⅰ aortic dissection, with satisfactory short-term and long-term efficacy.

Objective Exploring the clinical efficacy of using autologous rib cartilage grafting to reconstruct finger hemiarticular defects.Methods From August 2022 to February 2024,for 6 patients with hemiarticular surface defects in the metacarpophalangeal joints and interphalangeal joints of 8 fingers,costal cartilage was used for joint remodeling and transplantation to reconstruct the hemiarticular surface defects of the fingers.All 8 joint transplants in 6 patients were two-stage surgeries.In the first stage,antibiotic bone cement was used to fill the space-occupying lesions,and in the second stage,costal cartilage joint remodeling was performed to reconstruct the finger joint defects.Postoperative follow-up and assessment of fracture healing according to Paley fracture healing scoring criteria.Outpatient and WeChat follow-up,upper limb function is evaluated according to the upper limb functional assessment standards of the Chinese Medical Association Hand Surgery Society.Record VAS pain score.Results In this group,there were a total of 6 patients with 8 cases of hemiarticular defects.Among them,2 patients had two joint surgical sites,while the remaining 4 patients had a single joint surgical site.There were 2 cases of metacarpophalangeal joint head defects,2 cases of proximal articular surface defects,3 cases of proximal articular head defects,and 1 case of thumb proximal articular head defect.After surgery,8 out of 6 patients'hand wounds healed successfully.All patients were followed up for 6-12 months postoperatively,with an average of 9 months.The VAS pain score(affected finger)for the last follow-up was 0-2 points,with an average of 0.6 points.According to Paley's scoring criteria,all 6 patients had excellent fracture healing.According to the evaluation criteria for upper limb functional assessment of the Chinese Medical Association Hand Surgery Society,3 cases were rated as excellent,3 cases were rated as good,and 2 cases were rated as fair.Conclusion For patients with half joint defects on one side of the finger,rib rib cartilage was used for joint reconstruction,which significantly improved the joint shape and function at the defect site,and reduced joint pain scores.

Objective To compare the image quality of readout-segmented diffusion weighted imaging(RESOLVE-DWI)and integrated slice-by-slice shimming diffusion weighted imaging(iShim-DWI)in patients with nasopharyngeal carcinoma.Methods A retrospective study was conducted on 26 patients with nasopharyngeal carcinoma confirmed by pathology.The imaging data included RESOLVE-DWI and iShim-DWI.The signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of the two sequences were compared by one deputy chief imaging technician.And two experienced radiologists used the 5-point scoring scheme to compare the lesion clarity,image artifacts,and antideformation ability of the two sequences,repectively.Results The SNR and CNR of the iShim-DWI sequence were significantly higher than those of RESOLVE-DWI sequence(P＜0.01).While the subjective scores of lesion clarity,image artifacts,and antideformation ability on RESOLVE-DWI were significantly better than those of iShim-DWI,and the differences were statistically significant(P＜0.01).Conclusion Both RESOLVE-DWI and iShim-DWI obtained good images.With sufficient SNR and CNR,RESOLVE-DWI has clearer lesions and surrounding structures,higher image resolution,fewer artifacts,and better antideformation ability,thus providing clinical advantages in evaluating patients with good physical tolerance.

Objective:To evaluate the safety and efficacy of mild hypothermia arch-clamping technique in the surgical treatment of DeBakey Type Ⅰ aortic dissection.Methods:From December 2019 to November 2023, a total of 97 patients with DeBakey type Ⅰ aortic dissection who underwent arch-clamping technique in Beijing Anzhen Hospital were prospectively enrolled. The patients were divided into mild hypothermia group and moderate hypothermia group according to the lowest rectal temperature during the circulatory arrest period. The perioperative data of the two groups were compared, and complex adverse outcomes consisting of 30-day death, stroke, paraplegia and CRRT were used as the primary endpoint. Multivariate logistic regression was used to determine the predictors of clinical adverse outcomes. Survival analysis was evaluated by the Kaplan- Meier method. Results:The overall incidence of complex adverse outcomes was 20.6%, 13.6% in the mild hypothermia group and 22.7% in the moderate hypothermia group( P=0.535), and the incidence of stroke was 4.6% and 6.7%( P=1.000), respectively. The cardiopulmonary bypass time and aortic-clamping time in the mild hypothermia group were significantly shortened (147.5 min vs. 163.0 min, P=0.032; 89 min vs. 99 min, P=0.042). There was no significant difference in long-term survival and reintervention between the two groups(91.9% vs. 89.3%, P=0.87; 9.1% vs. 5.3%, P=0.13). Conclusion:Mild hypothermia arch-clamping technique is a safe and effective method for the treatment of DeBakey type Ⅰ aortic dissection, with satisfactory short-term and long-term efficacy.

Objective To explore the factors influencing the image quality of thyroid CT and the application value of optimization schemes in reducing streak artifacts in thyroid CT examinations.Methods A retrospective review of the data of 141 patients who underwent thyroid enhanced CT examinations was conducted to analyze the factors affecting image quality.After determining the influencing factors,a self-controlled study was conducted on 48 patients who underwent thyroid CT examinations to analyze the feasibility of the optimization scheme.Results The patients'body mass index(BMI),neck circumference,pharynx-jaw angle,and pharynx-jaw angle-to-neck circumference ratio showed statistically significant differences in their impact on image quality(P<0.05).Compared to the conventional scheme,the optimization scheme showed significantly higher subjective and objective image evaluations.The optimization scheme also significantly improved the diagnostic performance of the images,with statistically significant differences(P<0.05).There was no statistically significant difference in radiation dose between the two positions(P>0.05).Conclusion The optimization scheme can effectively reduce streak artifacts in thyroid CT examinations.

Objective To investigate the efficacy and the collective brain responses of acupuncture for post-stroke limb numbness.Methods A total of 24 patients with post-stroke limb numbness and 23 matched healthy participants were recruited.Both groups received coordinated acupuncture treatment to regulate their physical and mental state,three times a week for 4 weeks.Changes in limb numbness assessed by the visual analog scale(VAS)were observed before and after acupuncture.Functional magnetic resonance imaging(fMRI)scans were conducted on the participants during the scanning process with acupuncture intervention.Blood oxygen level-dependent(BOLD)data were collected in three states:resting state,acupuncture task state,and needle retention state.Data processing was performed using software such as fMRIPrep and brainIAK.Intersubject correlation(ISC)analysis was conducted to compare the ISC values of different brain regions between the two groups under different conditions.Results Acupuncture treatment significantly reduced the VAS scores of limb numbness.No significant changes in ISC values in both groups during resting state.Under acupuncture conditions,the patient group exhibited significantly increased ISC values in the left precentral gyrus,left paracentral lobule,left postcentral gyrus,left insula,left anterior cingulate gyrus,right middle frontal gyruss and right anterior cingulate gyrus.Under the needle retention condition,a slight negative activation was observed in the bilateral precentral gyrus of the control group.In the patient group,the ISC values of the left superior frontal gyrus,left precentral gyrus,left paracentral lobule,left precuneus,left postcentral gyrus,left insula,left anterior cingulate gyrus,left thalamus,right superior frontal gyrus,right middle frontal gyrus,right precentral gyrus,and right anterior cingulate gyrus showed a significant increase compared to the resting state.Conclusion Acupuncture can improve post-stroke limb numbness symptoms and induce a specific pattern of collective brain activation in patients.This activation involves the precentral gyrus,postcentral gyrus,thalamus,insula,frontal lobe and cingulate gyrus.Acupuncture may enhance the processing of sensory information by activating the somatosensory-motor network and the cortical-thalamic-cortical loop.It may also modulate the central executive network and the descending pain control pathway to promote the relief of pain symptoms.