Table of Content

10 March 2020, Volume 25 Issue 1

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Analysis of the effects of immediate planting and early planting on the soft tissue around the implant in the esthetic area

JIANG Xisong, ZHANG Xu, LI Long, et al

2020, 25(1):  1-3.  DOI: 10.12337/zgkqzzxzz.2020.03.001

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Objective: To analyze the effects of immediate planting and early planting on the soft tissues around the implants in the edentulous aesthetic area. Methods: A total of 60 patients with single anterior teeth loss from August 2015 to August 2019 were randomly selected. Among them, 30 patients were implanted immediately after tooth extraction(observation group), and 30 patients were implanted early after tooth extraction. Into the control group, the zirconia all-ceramic restoration was given to the Astra Tech implants and implants six months later, and the results were reviewed after half a year. The red aesthetic scores(PES) of the two groups were compared. Results: There was no significant difference between the two groups in the PES score and the PES scores of each node(P>0.05). In the PES scores of each node, the gingival biotype and alveolar bone defect, the distal nipple, the missing tooth position and the gingival height and there is a significant correlation between the cause of missing teeth and the height of near and far. Conclusion: The effects of immediate implantation and early implantation on the soft tissue around the implant in the edentulous aesthetic area are not obvious. The main effects of soft tissue aesthetics on implant restoration in the anterior aesthetic area include missing tooth position, gingival biotype and lack of teeth.

Application of Onlay bone grafting technique in the dental aesthetic area of anterior teeth

LIN Yong, HOU Dang, CHANG Xiaorong

2020, 25(1):  4-7.  DOI: 10.12337/zgkqzzxzz.2020.03.002

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Objective: To evaluate the application of Onlay bone grafting technique in dental aesthetic area of anterior teeth. Methods: To select 82 cases of patients undergoing dental implants repair surgery, according to the preoperative evaluation, the patients were given the Onlay bone grafting techniques and dental implants repair surgery. It was observed that the changes of alveolar ridge and dental aesthetic indexes during the period of Onlay bone grafting, and the survival rate of dental implants was recorded. Results: It was found that the horizontal bone mass of alveolar ridge(7.84±0.42)mm and the vertical bone mass of alveolar ridge(11.65±0.85)mm at the end of 3 months after Onlay bone grafting, and the horizontal bone mass of alveolar ridge(7.15±0.60)mm and the vertical bone mass of alveolar ridge(10.86±0.63)mm at the end of 6 months after Onlay bone grafting were significantly higher than that of pre-grafted bone, P=0.035、0.039、0.035、0.040, The PES(7.48±1.36) points,WES (7.56±1.09) points at the end of 3 months after dental implants surgery, and the PES(7.78±1.42) points,WES(7.82±1.51) points at the end of 6 months after dental implants surgery, were significantly higher than those before operation, P=0.040、0.043、0.038、0.032. After Onlay bone grafting, the bone tissue was beautiful and plump, the wound was well healed, there was no bone necrosis, and the implant survival rate was high. Conclusion: The application of Onlay bone grafting technique in the implantation and repair of the aesthetic area of anterior teeth can significantly improve the problem of insufficient bone quantity in the planting area. The bone healing is good and the implant survival rate is high, so it is worthy to be popularized.

Clinial study of platform switching for early implantation upper anterior teeth

ZHU Xuechen, MEI Dongmei, WANG Wenxue, et al

2020, 25(1):  8-12.  DOI: 1012337/zgkqzzxzz.2020.03.003

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Objective: To compare the effect of platform switching and butt-joint implant system on soft and hard tissues around implants in early implantation of upper anterior teeth. Methods: 40 patients with early implantation of upper anterior teeth were randomly divided into two groups: A(platform switching group, implant Nobel Active implant), R(butt-joint group, implant Nobel Replace implant) and 20 patients in each group. CBCT was taken at immediately after operation, 6 months after operation and 12 months after permanent crown restoration. Bone absorption of implant neck, lip and palate was measured at 6 months and 1 year after permanent crown restoration. Pink esthetics score(PES score) was performed after crown restoration. Periodontal soft tissue condition was examined at 12 months after restoration, and the results were analyzed statistically. Results: 1) Average bone resorption: 6 months after operation: in group A, the distal and near(0.25±0.12)mm, the lip and palate (0.28±0.13) mm, in group R, the distal and near(0.30±0.12)mm and the lip and palate(0.29±0.15)mm, there was no significant difference(P>0.05). 12 months after permanent crown restoration: in group A, there were significant differences in proximal and distal(0.38±0.14)mm, lip and palate(0.52±0.17)mm), distal (0.70±0.19)mm and lip and palate (0.77±0.18)mm in group R(P<0.05). 2) Pink aesthetic score: group A(10.90±0.89) score, group R(0.48±1.12) score, there was no significant difference (P>0.05). 3) Soft tissue condition after 12 months of permanent crown restoration: 6 sites average PD(mm) A group (1.98±0.53)mm, R group(2.75±0.75)mm, improved plaque index (mPLI) A group(0.81±0.93), R group(1.34±0.53), improved gingival sulcus bleeding index(mSBI) A group (0.61±0.19), R group (0.98±0.41), the difference was statistically significant(P<0.05). Conclusion: Platform-switching and butt joint implants can both acquire good clinical outcomes in early implantation of upper anterior. However, platform-switching is more bebificial for marginal bone and tissue preservation around dental implants.

Clinical analysis of reconstruction of attachment gingiva in dental implant repair

HE Fanglin, LIN Junfang, JIANG Lihui

2020, 25(1):  13-16.  DOI: 10.12337/zgkqzzxzz.2020.03.004

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Objective: To discuss and analyze the clinical value of attachment gingiva reconstruction in dental implant repair. Methods: There were 72 patients with dental implants treated in our hospital from October 2017 to October 2019 as our research objects. These 72 patients with dental implants were divided into two groups according to the principle of randomness(control group and experimental group), each group has 36 patients, the control group seams by conventional gum; the experimental group attached by gingiva reconstruction, and then the clinical effects of the patients were compared and analyzed for two groups. Results: The total effective rate of clinical therapeuticsin the experimental group (97.12%) was definitely higher than that in the control group(52.78%), before the two groups patients taking the operation, by means of statistics analysis, the average width of the two groups wasn't statistically significant(P>0.05), and the average width of 1 and 6 months after operation in the experimental group was statistically significant(P<0.05) compared with that in the control group. BI in the experimental group(0.71±0.54) , PLI (0.61±0.10), PD(1.69±0.38) were significantly better than BI(0.86±0.48), PLI (0.78±0.22), PD(2.91±0.44) in the control group, and the grade of physiological and psychological functions in the experimental group were significantly better than those in the control group. Conclusion: The application of AG reconstruction in dental implants can significantly enhances the clinic result of reconstruction and improves the quality of life of patients that also has high value on clinical application, which is worthy of clinical promotion and application.

A case of periapical periodontitis after immediate implantation of maxillary anterior teeth

ZHAO Binbin, KOU Ni, ZHONG Weijian, et al

2020, 25(1):  17-19.  DOI: 10.12337/zgkqzzxzz.2020.03.005

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Objective: To analyze the etiology of periapical periodontitis of implant and summarize the experience of treatment. Methods: One female patient was complicated with periapical periodontitis after immediate implantation of maxillary anterior teeth. The implant was removed and strict debridement irrigation was carried out. Iodoform gelatin sponge and platelet-rich fibrin were implanted in the implant fossa, and the implant was delayed. Observation of clinical repair effect. Results: The X-ray film showed that there was new bone formation in the bone defect, the transmission shadow disappeared and the graft was stable, and the repair effect was satisfactory. Conclusion: After the extraction of periapical teeth, there are residual granulation tissue and inflammatory scar tissue in the extraction fossa. It is necessary to scrape off the granulation tissue and infection, otherwise, it is easy to cause the failure of implantation due to the residual bacteria in the planting area. The choice of planting time and the application of antibiotics before and after implantation are also the key factors for successful implantation.

Study on complications and risk factors of oral implant restoration in 100 patients with dentition defect

LAN Jing, LI Biao, SUN Liangfeng, et al

2020, 25(1):  20-23.  DOI: 10.12337/zgkqzzxzz.2020.03.006

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Objective: A follow-up study of 100 implanted patients in our hospital was conducted to investigate the retention rate, complications and risk factors of implants after implant restoration, in order to prevent and reduce the occurrence of implant restoration complications. Methods: 100 patients who underwent implant restoration in our hospital from January 2017 to September 2019 were enrolled in the study. The patient's admission information, basic clinical data, implant restoration and complications were recorded, and the complications were discussed. Results: The study included 100 patients with dental implants from January 2017 to September 2019, and 143 implants. The total number of implants was removed and dropped, and the retention rate was 97.90%. There was no significant difference in the retention rate of implants and the incidence of complications(P>0.05). According to the type of repair complications, the overall incidence of each repair complication was counted. The specific results are shown in the following table. The top three complications were food impaction(45.0%), abutment or abutment screw loosening (6.0%). And loss of adjacency(5.0%) (both P<0.05). Logistic regression analysis found that patients>50 years of age had a higher risk of complications than patients≤18 years of age; compared with patients with adequate bone mass, the risk of complications was increased in patients with insufficient bone mass, diabetes is independent risk factors for complications occur more frequently in diabetic patients. Gender and smoking had no significant effect on complications. Conclusion: Food caulking and abutment or abutment screw loosening are common complications, and the incidence of complications in the posterior region, advanced age, insufficient bone mass, and diabetes is relatively high.

The application of immediate implant placement in failure of root canal therapy cases

WANG Cairui, LI Shuguang

2020, 25(1):  24-25.  DOI: 10.12337/zgkqzzxzz.2020.03.007

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Objective: To explore the application of immediate implant placement in root canal therapy failure cases. Methods: 64 patients who came from January 2014 to December 2017 were selected. After root canal treatment failed, 66 implants were implanted. The 32 implants were implanted by immediate implant method, and 34 implants were implanted routinely at least three months after extraction as control group. The 1-year survival rate, peri-implant plaque index(PLI), modified peri-implant hemorrhage index(mBI) and probing depth(PD) of the two groups were compared. The data were analyzed by PASW statistic 20.0 software. Result: The 1-year survival rate of weight-bearing in the two groups was 100%. There was no significant difference in PLI, mBI and PD around implants between the two groups. Conclusion: For root canal treatment failure cases, immediate implant is a feasible way of restoration.

How to improve the safety of oral implant outpatient treatment during the COVID-19 epidemic

ZHAO Xinxia, TENG Lizhao, HUANG Bei, et al

2020, 25(1):  26-31.  DOI: 10.12337/zgkqzzxzz.2020.03.008

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The outbreak and spread of covid-19 (Corona Virus Disease 2019) has become a "public health emergency of international concern" identified by the world health organization ^[1], bringing huge challenges to the diagnosis, treatment and care of oral implant clinics. The specialty of oral implant treatment and the epidemiological characteristics of covid-19 make oral medical personnel a high-risk group for covid-19 infection, and the outbreak of the epidemic is at risk of oral operation. According to the general requirements for prevention and the professional characteristics of dental implant clinics, this paper formulated relevant nursing prevention and control measures to ensure orderly nursing work and improve the safety of diagnosis and treatment. The contents of this paper include pre-examination and triage, protection under different working scenarios and improving the environmental safety of oral implant outpatient service, etc. The oral care and protection strategies under the epidemic situation are proposed to protect the health of medical staff and patients, so as to provide reference for the nursing and prevention work of oral implant outpatient service during the epidemic period.