Peri-implant keratinized mucosa (PIKM) augmentation refers to surgical procedures aimed at increasing the width of PIKM. Consensus reports emphasize the necessity of maintaining a minimum width of PIKM to ensure long-term peri-implant health. Currently, several surgical techniques have been validated for their effectiveness in increasing PIKM. However, the selection and application of PIKM augmentation methods may present challenges for dental practitioners due to heterogeneity in surgical techniques, variations in clinical scenarios, and anatomical differences. Therefore, clear guidelines and considerations for PIKM augmentation are needed. This expert consensus focuses on the commonly employed surgical techniques for PIKM augmentation and the factors influencing their selection at second-stage surgery. It aims to establish a standardized framework for assessing, planning, and executing PIKM augmentation procedures, with the goal of offering evidence-based guidance to enhance the predictability and success of PIKM augmentation.
Humans ; Consensus ; Dental Implants ; Mouth Mucosa/surgery* ; Keratins

Objective Guided by the"central-peripheral-central"theory,this study analyzed the influ-ence of repeated transcranial magnetic stimulation(rTMS)combined with intelligent rehabilitation robot hand training on the rehabilitation effect of stroke patients in the convalesce stage,in order to provide more new ide-as for clinical patients.Methods A total of 86 stroke patients who were treated in the department of rehabili-tation in Integrated Traditional and Western Medicine Hospital of Linping District,Hangzhou from July 2021 to July 2024 were prospectively selected and divided into observation group(n=43)and control group(n=43)by random number table method.The observation group received rTMS based"central-peripheral-central"theory combined with intelligent rehabilitation robot hand training on the basis of routine rehabilitation,while the control group received intelligent rehabilitation robot hand training combined with rTMS pseudo-stimula-tion intervention on the basis of routine rehabilitation.The changes of upper Fugl-Meyer motor function as-sessment(FMA),Modified Barthel Index(MBI),upper limb movement pattern(Brunnstrom Staging Scale)and joint motion before and after intervention were recorded in two groups.Results After intervention,the scores of FMA and MBI in two groups were higher than before intervention,and the observation group was significantly higher than that of the control group(P＜0.05).After intervention,the rate of patients in Brunnstrom stage Ⅱ was decreased,while the rates of patients in Brunnstrom stage Ⅲ and Ⅳ were increased,and the observation group was better than the control group(P＜0.05).After the intervention,the motion degrees of shoulder forward flexion,shoulder abduction,shoulder back extension,elbow flexion,elbow exten-sion,forearm pronation,forearm pronation,carpal palm flexion and wrist back extension in two groups were significantly higher than that before the intervention,and the observation group was significantly higher than the control group(P＜0.05).Conclusion Intelligent rehabilitation robot hand training combined with rTMS can improve upper limb active joint motion,upper limb motor function and daily living ability of stroke pa-tients in the convalescence period.

Objective:We aimed to develop a novel visualized model based on nomogram to predict postoperative overall survival.Methods:This was a multicenter, retrospective, observational cohort study, including participants with histologically confirmed gastric and colorectal cancer who underwent radical surgery from 11 medical centers in China from August 1, 2015 to June 30, 2018. Baseline characteristics, histopathological data and nutritional status, as assessed using Nutrition Risk Screening 2002 (NRS 2002) score and the scored Patient-Generated Subjective Global Assessment, were collected. The least absolute shrinkage and selection operator regression and Cox regression were used to identify variables to be included in the predictive model. Internal and external validations were performed.Results:There were 681 and 127 patients in the training and validation cohorts, respectively. A total of 188 deaths were observed over a median follow-up period of 59 (range: 58 to 60) months. Two independent predictors of NRS 2002 and Tumor-Node-Metastasis (TNM) stage were identified and incorporated into the prediction nomogram model together with the factor of age. The model's concordance index for 1-, 3- and 5-year overall survival was 0.696, 0.724, and 0.738 in the training cohort and 0.801, 0.812, and 0.793 in the validation cohort, respectively.Conclusions:In this study, a new nomogram prediction model based on NRS 2002 score was developed and validated for predicting the overall postoperative survival of patients with gastric colorectal cancer. This model has good differentiation, calibration and clinical practicability in predicting the long-term survival rate of patients with gastrointestinal cancer after radical surgery.

Objective:To investigate the mental health status of postgraduates in a medical university in southwest China and analyze its influencing factors.Methods:A total of 622 clinical medical postgraduates from a medical university were investigated by basic information questionnaire and symptom Checklist-90 (SCL-90). Logistic regression was performed for data analysis. Excel 2010 was used for data entry, and SPSS 22.0 was used for statistical analysis.Results:The scores of each factor were as follows: somatization=1.24±0.44, compulsion=1.62±0.64, interpersonal sensitivity=1.4±0.54, depression=1.45± 0.64, anxiety=1.37±0.56, hostility=1.31±0.50, fear=1.18±0.42, paranoia=1.27±0.51, psychosis=1.25± 0.46, others=1.36±0.53. Besides, 169 (27.2%) people had positive mental health symptoms, and the top three symptoms were compulsion, depression and interpersonal sensitivity. The results of multivariate logistic regression analysis showed that grade, professional satisfaction, postgraduate study motivation and family education style were the influencing factors of mental health status of postgraduates in medical colleges and universities.Conclusion:The mental health status of postgraduates in medical colleges is worse than before. According to the influencing factors, targeted measures should be taken to improve the mental health level of postgraduates.

OBJECTIVE: To summarize and analyze the postoperative short-term complications of laparoscope-assisted transanal total mesorectal excision (taTME) for rectal cancer patients after neoadjuvant therapy. METHODS: A prospectively established database on taTME patients at Peking University Cancer Hospital was screened with the following conditions: data retrieval from June 2016 to August 2018, pathologically confirmed adenocarcinoma, receiving preoperative neoadjuvant chemoradiotherapy or chemotherapy. The transabdominal procedure and the transanal procedure were performed simultaneously in the taTME operation. Occurrence of complications during perioperative period (within postoperative 3 months) in these patients, especially anastomosis-related complications and their management were analyzed. The relevant complications were recorded according to the Clavien-Dindo (CD) grading criteria. The severity of anastomotic leakage and anastomotic stenosis was evaluated according to criteria developed by the International Rectal Cancer Research Group. RESULTS: A total of 29 patients were enrolled in this study. In the 29 patients, 25 (86.2%) were male and 4 (13.8%) were female, the median age was 60 (range, 30 to 72) years, the median body mass index was 25.8 (range, 19.8 to 36.4) kg/m, the median distance from the tumor to anal verge was 4 (range, 2 to 8) cm. All the patients completed laparoscope-assisted taTME operations successfully without conversion to laparotomy, intra-operative severe complication or death. The median operation time was 300 (range, 198 to 405) minutes, and the median intra-operative blood loss was 100 (range, 50 to 200) ml. All the TME specimens were complete according to the Nagtegaal standard. All the patients underwent prophylactic ileostomy. Hartmann procedure was performed in one case due to poor blood supply in the proximal bowel without the possibility of anastomosis. Anal sphincter preservation rate was 96.6% (28/29). The median postoperative exhaust time was 2 (range, 1 to 10) days, and the median postoperative hospital stay was 9 (range, 7 to 24) days. Fifteen patients (51.7%) had postoperative complications, among which serious complication (CD grade IIIb and above) accounted for 6.9% (2/29). No perioperative death was observed. Five patients (17.2%) presented anastomosis-related complications, including 2 cases of grade C anastomotic leakage due to anastomotic rupture, who underwent abdominal perineal resection 1 month after operation; 2 cases of grade B anastomotic leakage, who improved after conservative treatment; 1 case of grade A anastomotic stenosis, who improved with anal expansion 1 month after operation. The incidence of postoperative infection was 24.1% (7/29), including 6 cases of pelvic infection and 1 case of trocar site infection, all of which were CD grade II. One case had incomplete intestinal obstruction (CD grade II); 1 case had gastroplegia; 1 case had abdominal trocar hernia. All the patients were followed up for a median of 12.0 (range, 3.9 to 29.9) months. Seven cases did not undergo ileal stoma closure. The anal sphincter preservation rate was 75.9% (22/29). CONCLUSION Pelvic infection and anastomosis-related complications are common after laparoscope-assisted taTME surgery for rectal cancer patients following neoadjuvant chemoradiotherapy, which require active management and appropriate treatment.
Adult ; Aged ; Anal Canal ; Female ; Humans ; Laparoscopes ; Male ; Middle Aged ; Neoadjuvant Therapy ; Postoperative Complications ; Rectal Neoplasms ; therapy

Objective To study the CT perfusion imaging features of pancreas under liver cirrhosis.Methods 191 cases including 48 normal controls(group A)and 143 patients with liver cirrhosis(group B)were randomly collected according to the inclusion and exclusion criteria.The scope of pancreatic perfusion imaging scan was determined based on conventional plain CT scan of middle and upper abdomen.All patients were injected with contrast agent at the antecubital vein tunnel group and then with normal saline at the same rate.The original perfusion images were transmitted to the workstation and were analyzed by the pancreatic perfusion software package,and the perfusion parameters were recorded for statistical analysis.Results (1)There were statistical differences in pancreatic perfusion parameter values,namely blood flow(BF),blood volume(BV)and mean transit time(MTT),between group A and group B(P<0.05).BF and BV of group B were lower than those of group A but MTT was higher than that of group A,and there was no statistical difference in permeability surface(PS)(P>0.05).(2)For group B,each pancreas part(head,body and tail)had no statistical difference in perfusion parameter values,namely BF,BV,PS and MTT(P>0.05).(3)For group B which was divided into three groups according to Child-Pugh,there were statistical differences in parameter values BF and BV(P<0.05)among the three groups and no statistical differences in BF and BV among any two of the groups(P<0.05);there were no statistical differences in PS and MTT among the three groups.(4)In group B,there was a statistical difference in BF between the subgroup with collateral circulation and the one without collateral circulation(P<0.05),the subgroup with collateral circulation showed lower BF than that of the subgroup without collateral circulation and there were no statistical differences in BV,PS and MTT(P>0.05).Conclusion Liver cirrhosis can result in microcirculation disturbance of pancreas,the change in microcirculation varies depending on the degree of liver cirrhosis, and CT perfusion imaging is helpful to the evaluation of pancreatic microcirculation in the state of liver cirrhosis.

OBJECTIVETo explore the applicable value of transanal total mesorectal excision (taTME) in male low rectal cancer patients with narrow pelvis-"difficult pelvis", which remains difficult for both open and laparoscopic sphincter-saving operations.

METHODSClinical data of male low rectal cancer patients diagnosed by pathology undergoing taTME between June 2016 and January 2018 at Peking University Cancer Hospital were collected. A retrospective cohort study was performed. Patients were selected according to the following criteria: (1) low rectal cancer, the distance between inferior margin of tumor and anal verge ≤5 cm; (2) the distance between two sciatic tubercles <5 cm; (3) body mass index (BMI) >25 kg/m; (4) tumor horizontal diameter ≤4 cm. Operation time, intraoperative blood loss, postoperative hospital stay, postoperative complications and anal function were analyzed.

RESULTSA total of 20 patients were included in this study. All the patients received preoperative neoadjuvant chemoradiation and hybrid transabdominal and transanal surgery. The median BMI was 27.7(26.2-36.4) kg/m; the median distance between two sciatic tubercles was 92.5 (78-100) mm; the median distance between the inferior margin of tumor to the anal verge was 4 (2-5) cm; the median operation time was 302 (215-402) min; the median intraoperative blood loss was 100 (50-200) ml; the median postoperative hospital stay was 9 (5-15) d. Postoperative complications occurred in 5 patients (25%), including 3 pelvic infection, 1 intestinal obstruction, 1 anastomotic leakage receiving sigmoid colostomy. There was no perioperative death. Sphincter-preservation rate was 100%. Nineteen patients received anal manometry 1 month after operation with normal resting pressure (41.5±8.6) mmHg and squeeze pressure (121.0±11.6) mmHg. All the patients were followed up to March 2018, and the median follow-up time was 4.5 months. Only 1 patient had supraclavicular lymph node metastasis and no local recurrence was found.

CONCLUSIONSThe safety of transanal total mesorectal excision for male patients with low rectal cancer and difficult pelvis is acceptable. TaTME is helpful to preserve the anal sphincter.

Adult ; Anal Canal ; surgery ; Humans ; Laparoscopy ; Male ; Neoplasm Recurrence, Local ; Pelvis ; surgery ; Postoperative Complications ; Rectal Neoplasms ; surgery ; Retrospective Studies ; Treatment Outcome ; Universities

Objective To explore the value of pelvic fascia changes after high intensity focused ultrasound (HIFU) ablation of uterine fibroids patients with MRI.Methods The pelvic MRI and clinical data of 283 patients with uterine fibroids after treatment of HIFU were analyzed retrospectively.The total power and irradiation time of HIFU,and the degree of pelvic fascia edema changes were observed.The correlation between age,fibroids location,type,number,volume,total energy,irradiation time of HIFU and the degree of pelvic fascia edema were analyzed.Results Totally 201 patients (201/283,71.02％) had pelvic fascia edema and 59.71％ (169/283) were degree 1 and 2.There was significant difference in the degree of pelvic fascia edema in patients with different fibroids (x2 =27.50,P=0.007).There was no correlation between patients age,number,volume,type of fibroids,nor pelvic fascia edema (all P＞0.05).HIFU energy and irradiation time were positively correlated with the degree of pelvic fascia edema (rs =0.288,0.317,both P＜0.001).Conclusion MRI can observe pelvic fascia edema caused by HIFU treatment of uterine fibroids.HIFU irradiation time,total energy,and location of uterine fibroids location are the main influencing factors.

Purpose To explore the correlation between normal pancreas and abdominal aorta in the peak enhancement (PE) and the shift time at the peak by applying the multislices spiral CT perfusion imaging.Materials and Methods Prospectively analyzed 62 patients who received enhancement CT examination for the superior or the middle abdomen,underwent optimum level CT perfusion imaging after plain scanning.These data were processed on a Vitreal 2.0 worker-station by using Toshiba body software package.The time-density curves (TDC) of the normal pancreas and the abdominal aorta were drawn,the PE and the shift time of PE were recorded and their correlation was analyzed.Results Compared with abdominal aorta,the mean value of PE of the normal pancreas was lower,and the difference was statistically significant [(111.94± 14.42)HU vs (351.83 ± 74.93)HU,P＜0.05],the mean difference was (246.10± 65.86)HU.Compared with abdominal aorta,the mean shift times of PE of the normal pancreas was latter,and the difference was statistically significant [(37.56±6.90) s vs (30.82±6.73) s,P＜0.05],the mean difference was (6.54±2.97)s.The PE and shift time of PE of the normal pancreas were positively and linearly correlated with that of abdominal aorta (r=0.438,r=0.379).Conclusion The PE of the normal pancreas is not synchronous with that of the abdominal aorta.The shift time of the former is usually 6～8 seconds slower than that of the latter.This provides a basis to find the PE of the normal pancreas in enhanced scan.

Objective To investigate the recent effect and safety of magnetic resonance guided focused ultrasound (MRgFUS) for treating uterine fibroids with a Meta analysis. Methods Such databases as Cochrane Library,PubMed,EMbase, CBM,CNKI,CQVIP and Wanfang were searched from their establishment. After thestudy selected, assessment and data extraction conducted by two reviewers independently, Meta-analysis were performed by using the Comprehensive Meta-analysis V2 software. The volume of non-perfusion ratio (NPVR), fibroid shrinkage, clinical symptom severity (SSS score) and adverse reactions were analyzed.Results Nighteen retrieved articles were included, with a total of 1 549 patients. The results of Meta-analysis showed that:(1)nonperfused volume ratio (NPVR),Mean=57.1%(95%CI 45.0% —69.2%).(2)Percentage of FBs shrinkage:mean=31.4% (95% CI 29.2% —33.6%).(3)Symptom severity score (SSS):baseline mean=51.00(95%CI 41.61—60.40),3 months mean=32.50 (95%CI 25.90—39.10),6 months mean=28.62(95%CI(23.57—33.66),12 months mean=24.46(95%CI 15.44—33.49), the average of the severity score of the patient symptoms had a tendency to reduce.(4)The degree of adverse reactions were mild and could relieve itself, there was fewer serious adverse reactions. Conclusions The current evidence indicates that MRgFUS in treatment of uterine fibroidsis reliable and safe. MRgFUS can significantly reduce the volume and the symptom severity score ofthe patients.