Chinese Journal of Oral Implantology

Effects of platelet-rich fibrin(PRF)on periodontal ligament healing in dislocation replantation

WANG Deli, LIN Yangyang, XI Yuli, et al

2018, 23(4): 155-159. DOI: 10.12337/zgkqzzxzz.2018.12.001

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Objective: To investigate the effect of platelet-rich fibrin(PRF)on promoting periodontal healing by replantation of canine dislocation. Methods: 10 adult mongrel dogs were selected and the upper and low-er anterior teeth were pulled out at intervals. Whole blood was extracted from jugular vein to prepare PRF and PRP. The dislocated teeth were randomly divided into groups according to 30min, 1h and 2h after dry placement in vitro. The infected teeth in each group were replanted with PRF, PRP or without any graft, and immediate replantation was used as the control group. Histological observation was used to evaluate the periodontal healing in each group. Results: The first group presented normal periodontal membrane structure. No inflammatory changes and inflammatory absorption, no inflammatory changes and inflamma-tory absorption occurred in groups 3 and 4, and the difference in normal periodontal membrane and sur-face absorption was not statistically significant(P>0.05). The periodontal membrane structure of the fourth group and the seventh group had relatively dense collagen fiber structure and strong directivity. There was no significant difference in normal periodontal membrane between the fourth group and the seventh group and the first group(P>0.05). Normal periodontal membrane of the 7th group was higher than that of the 6th group, while surface absorption was lower than that of the 6th group, and the difference was statistically significant(P<0.05). There was no significant difference in surface absorption between the 9th group and the 10th group(P>0.05), but surface absorption was mostly repaired and static. Conclusion: The effect of PRF on periodontal healing was more obvious than that of the group without grafting and the group using PRP. After 2h of dislocation, PRF/PRP was difficult to promote periodontal healing.

The CBCT study of lingual concavity in the mandibular posterior region

LI Zhi, DONG Qiang, LI Ying, et al

2018, 23(4): 160-163. DOI: 10.12337/zgkqzzxzz.2018.12.002

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Objective: This study took use of CBCT(Cone Beam Computed Tomography) to measure and to ana-lyze the lingual concavity of the mandibular posterior region. When implanted in the mandibular posterior region, it provided some certain imaging references to preoperative diagnosis design and effective avoid-ance of concavity. Methods: According to the inclusion and discharge criteria, 318 of CBCT raw datas were there for measurement, upon which statistical analysis was performed through SPSS 22.0 statistical software package. Results: 1. The incidence of concavity was statistically different from age and tooth po-sition. 2. The indentations of different tooth positions were statistically different in the ABC area for differ-ent teeth. 3. There were statistical differences among three groups of measurements from different tooth positions. 4. The three groups of measurements in the ABC area were statistically different. Conclusion: This study suggested that when large concavity occurred in the AB region, the chance of lingual perfora-tion increased. Another finding of this study was that in the position of the second premolar of the lower jaw, sometimes there was a large undercut on the lingual side, and simultaneously an undercut on the buc-cal bone wall would be there, the rigorous design before surgery was especially important together with the presence of the buccal pupil.

Evaluation of the effect of minimally invasive oral implantation on alveolar ridge crest absorption

ZOU Ziying

2018, 23(4): 164-166. DOI: 10.12337/zgkqzzxzz.2018.12.003

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Objective: To investigate the clinical effect of minimally invasive non-flap implantation and tradi-tional flap implantation on alveolar ridge parietal bone resorption in patients with loss of teeth with good bone mass. Methods: 120 edentulous patients who underwent dental implantation in our hospital from January 2016 to June 2017 were randomly divided into control group and observation group, 60 cases in each group. Patients in the control group were treated with traditional flap implantation, while patients in the observation group were treated with minimally invasive non-flap implantation. Results: The success rate of planting was 96.67% in the observation group, significantly higher than 85.00% in the control group (P<0.05). The incidence of adverse events in the observation group was 1.67%, significantly lower than 11.67% in the control group(P<0.05). The PES score and implant stability coefficient in the observa-tion group were significantly higher than those in the control group(P<0.05). The absorbance of alveolar ridge parietal bone in the observation group was significantly lower than that in the control group at 6 and 12 months after operation(P<0.05). Conclusion: Minimally invasive non-flap implantation has high suc-cess rate, good stability, low alveolar ridge parietal bone resorption, and can alleviate the complications and pain.

Esthetic comparison between single implant-supported immediate restoration and delayed restoration following immediate implant treatment in the anterior maxilla

XU Sheng, YU Hui, LIU Zhonghao, et al

2018, 23(4): 167-171. DOI: 10.12337/zgkqzzxzz.2018.12.004

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Objective: To compare the esthetic outcome between single implant-supported immediate restoration and delayed restoration following immediate implant treatment in the anterior maxillary. Methods: Thirty-six single implants were included. All of the implants were placed immediately into fresh extractions. 17 implants received immediate provisional restorations(Group A) and 19 implants executed delayed provisional restorations(Group B) which based on temporary abutments and temporary crowns. The final restorations were performed after 6 months and assessed using pink esthetic scores(PES) and white esthetic scores(WES). Results: All of the implants gained osseointegration. The survival rate of both groups were 100%. There was no significant difference between two groups. Mean value of PES in Group A（11.45±1.77）was higher than that of Group B（11.26±1.48）, mean value of WES in Group A （8.36±1.23）was lower than that of Group B（8.38±1.25）, there was no statistically significant difference between two groups. 47.06% of Group A showed perfect pink esthetic outcome(PES≥12), 47.37% in Group B. About white esthetic outcome(WES≥9), 52.94% in Group A and 52.63% in Group B, these values showed no statistically significant difference between two groups. Conclusion: In the 12 months follow-up period, there are no statistically significant difference between two groups both in esthetic outcomes and implant survival rate.

Clinical study on treatment of vertical bone deficiency at mandibular posterior area with short implants

FU Zhennan, ZHANG Peifen, HUANG Jinhong, et al

2018, 23(4): 172-175. DOI: 10.12337/zgkqzzxzz.2018.12.005

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Objective: To study and analyze the clinical effect of short implant treatment on vertical bone deficiency at mandibular posterior area. Methods: A total of 82 cases with vertical bone deficiency at mandibular posterior area treated in our hospital from January 2017 to June 2017 were selected as study objects, and were randomly divided into the experimental group and the control group. The control group received conventional implant treatment, and the experimental group received short implant treatment. The differences in clinical treatment effect, marginal bone height, complications and satisfaction were compared between the two groups. Results: The retention rate of implant in the experimental group and the control group was 100.00%(41/41) and 90.24%(37/41) respectively, the former was higher than the latter, and the difference was statistically significant(P<0.05). The marginal bone height of the experimental group was significantly lower than the control group(all P<0.05). The complication rate of the experimental group was lower than the control group, and the difference was statistically significant(P< 0.05). The satisfaction of the experimental group was higher than the control group, and the difference was statistically significant(P<0.05). Conclusion: The clinical effect of vertical bone deficiency at mandibular posterior area treatment is significant, which is beneficial to increase the implant retention rate, improve the edge bone height, reduce the risk of complications and improve the satisfaction. It is worthy of clinical application.

Application of collagen sponge in immediate implant placement in molar regions for wound healing

CEN Wen, WANG Yi, HUANG Jiangqin, et al

2018, 23(4): 176-179. DOI: 10.12337/zgkqzzxzz.2018.12.006

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Objective: To evaluate the clinical efficacy of collagen sponge on wound healing in the immediate implantation in the molar area. Method: Forty-two patients with immediate implantation in molar regions were collected during January 2017 to December 2017. A total of 49 implants were implanted. Collagen sponge was used to compress on the wound as test group of 26 immediate implantation. The control group of 23 immediate implantation was preformed with open wound. The VAS pain score, wound bleeding, wound healing, and osseointegration were recorded. Results: There were significant differences in wound bleeding between the two groups(P<0.05). There were no significant differences in VAS pain score, wound healing and osseointegration(P>0.05). Conclusion: Collagen sponge has positive effects on wound healing in immediate implantation, the postoperative hemostasis effect is significant,and early osseointegration is not affected.

Changes of serum CRP and urine deoxypyridinoline content in patients with dental implant repair at different stages and their correlation analysis

YIN Li, WU Jianbo, GENG Fayun, et al

2018, 23(4): 180-182. DOI: 10.12337/zgkqzzxzz.2018.12.007

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Objective: To investigate the relationship between serum CRP（C-Reactive Protein）and urine de-oxypyridinoline in patients with dental implant repair at different stages. Methods: 100 patients who needed artificial implantation of a single tooth in our hospital were selected as the study subjects, and all the patients met the criteria of this study. The patients were performed 1 day before operation and 1 month after operation, respectively. Serum CRP and urine deoxypyridine were measured 6 months after opera-tion. The results were recorded as group A, group B and group C. Results: The level of serum CRP in 1 month after operation was significantly higher than that in the first day of operation, and the serum CRP was significantly decreased at 6 months after operation(P<0.05). Compared with the results of the three groups, the mean of the three groups was statistically different. The comparison of the results of the three groups showed that the serum CRP was significantly increased at 1 month after operation. Results there was a significant difference between the two groups(P<0.05). Although the serum CRP measured 6 months after operation was higher than that of serum CRP measured 1 day before operation, there was no signifi-cant difference between the two groups(P>0.05). The results of 1 day after operation and 6 months after op-eration were higher than those of 1 day before operation, and the highest value was detected in 1 month af-ter operation(P<0.05). There was statistical difference in the mean value between the two groups. The re-sults of pre-operation were statistically different from those of the other two groups(P<0.05), but there was no statistical difference between the two groups after operation(P>0.05). Conclusion: Serum CRP and uri-nary deoxypyridinoline levels increased during the active period of alveolar bone resorption during oral re-pair. Serum CRP and urine deoxypyridinoline can be used as a preliminary index for alveolar bone remod-eling in the period of artificial dental implant repair.

Analysis on the effect of maxillary sinus augmentation in the treatment of maxillary posterior tooth loss

ZHANG Ningning

2018, 23(4): 183-186. DOI: 10.12337/zgkqzzxzz.2018.12.008

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Objective: To study the effect of maxillary sinus augmentation for the treatment of maxillary posteri-or tooth loss. Methods: 84 patients with maxillary posterior tooth loss admitted to our hospital from Febru-ary 2015 to February 2017 were taken as the study subjects, and were divided into the study group and the control group according to the random number table method. The control group was treated with con-ventional clinical implantation and repair, while the study group was treated with implantation and repair of maxillary sinus augmentation. The clinical efficacy, chewing function recovery time, treatment time, postoperative complications and aesthetic satisfaction of the two groups were compared. Results: The to-tal effective rate of the study group was higher than the control group(P<0.05).The recovery time and treat-ment time of chewing function were lower in the study group than in the control group(all P<0.05). The in-cidence of postoperative complications was lower in the study group than in the control group(P<0.05). The aesthetic satisfaction of the study group was higher than the control group(P<0.05). Conclusion: Max-illary sinus internal promotion in implant prosthesis in the treatment of maxillary teeth loss patients after curative effect is distinct, chewing function, promote patients, reduce the risk of postoperative complica-tions occurred at the same time, improve the aesthetic satisfaction. Which is worthy of clinical promotion and application.

Clinical analysis of tooth extraction site preservation technology applied to dental implants

LIU Huanlei

2018, 23(4): 187-189. DOI: 10.12337/zgkqzzxzz.2018.12.009

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Objective: To investigate the clinical effect of extraction site preservation technique in implant treat-ment. Methods: 86 patients with anterior teeth extraction from July 2016 to August 2017 were randomly divided into two groups. in the control group, implants were not preserved at the extraction site. in the ob-servation group, Bio-Oss collagen implants and Bio-Gide membrane were applied immediately after ex-traction, and temporary dentures were made. The success rate of implantation in 2 groups was retrospec-tively observed. Results: The difference of alveolar bone height and width in the observation group was significantly smaller than that in the control group at 6 months after extraction(P<0.05). After treatment, the implant success rate of the observation group was as high as 100%, and that of the control group was 88.37%. The success rate of the observation group was significantly higher than that of the control group(P <0.05). Six months after treatment, compared with the control group, the PES score and new bone mineral density of the observation group were significantly higher, and the vertical alveolar ridge bone absorption and the lip and palate(tongue) bone absorption were significantly lower(P<0.05). Conclusion: The tech-nique of tooth extraction site preservation can significantly reduce the bone defect caused by tooth extrac-tion, create better conditions for new bone formation, and consequently effectively preserve alveolar bone mass, which is conducive to the effective improvement of implant success rate.

Maxillary sinus floor elevation with maxillary sinus cyst: a clinical summary of 11 cases

GUO Qi, GAO Gongjie

2018, 23(4): 190-192. DOI: 10.12337/zgkqzzxzz.2018.12.010

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Objective: To investigate the feasibility of simultaneous implantation of maxillary sinus floor eleva-tion in the presence of maxillary sinus cysts. Methods: 11cases with maxillary posterior teeth implants and maxillary sinus cysts were selected. Extra-maxillary sinus elevation was needed. 15 cysts were treat-ed and implants were implanted at the same time. After 6-9 months, the bone union and cyst recurrence were examined. Result: All the 11 patients achieved good clinical results. All the 11 patients achieved good clinical results. All the 15 implants had good osseointegration and no cyst recurred. Conclusion: In the presence of maxillary sinus cyst, simultaneous implantation of maxillary sinus floor elevation is reliable.

The effect of tooth extraction site preservation technique applied to dental implantation

ZHU Yanlai

2018, 23(4): 193-195. DOI: 10.12337/zgkqzzxzz.2018.12.011

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Objective: To analyze the clinical application effect of tooth extraction site preservation technology in dental implantation. Methods: To choose between April 2017 and May 2017 in our hospital to see a doctor to 60 patients with tooth extraction and dental implants as the research object, using the random number table method divided into control group and experimental group, 30 cases in each group. The ref-erence group underwent routine treatment after tooth extraction, followed by dental implant implantation. In the experimental group, tooth extraction was followed by tooth extraction site preservation and dental implant implantation. Results: The planting success rate of the experimental group was 96.7% (29/30), and that of the control group was 66.7% (20/30). The score of aesthetic effect and satisfaction index of pa-tients in the experimental group was significantly higher than that of the control group, and the data of the two groups were significantly different(P<0.05). Conclusion: Oral planting restoration process of the tooth extraction sites preservation technology, can effectively reduce pressure after tooth extraction in patients with bone absorption, reduce loss of teeth and bone height, width, late to give oral implant prosthesis to create more good planting environment, can effectively improve oral planting the chances of success.

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