To research the feasibility and preliminary clinical effect of an implant - supported fixed bridge based on interactions with the posterior interocclusal space deficiency.

Four patients with multiple implant-supported fixed-bridge restorations for interocclusal space deficiency in posterior teeth were included in this study. The 8 total implant sites had an average interocclusal space size of 3.3 mm. Two abutments with an undercut area were performed, the fixed bridge was placed by rotating it without a common path of insertion, and the abutment screw was then tightened. In the production process, the interaction retention concept and methods were fully communicated to the technician. The abutments and bridges on the implants were placed, and the clinical effect was observed.

The prosthesis was fixed well and presented appropriate functioning. At the 3-month and 18-month follow-up examination, the prosthesis and abutments were not loose, and the abutments did not release or break. No swelling or tenderness was observed in the margin of the implants.

The interaction retention is a good method of resolving the problem of interocclusal space deficiencies in the posterior teeth.

To summarize experience treating dog bites in the oral and maxillofacial regions of children and provide a reference for clinical practice.

Nineteen children with dog bite wounds in the maxillofacial region were treated from July 2011 to June 2018 with primary debridement and suturing. A rabies vaccine, tetanus vaccine and human immunoglobulin as a passive immune agent were given via intramuscular injection. Anti-inflammatory therapy with amoxicillin and clavulanate potassium or other antibiotics. Follow-up observation and a retrospective analysis of the treatment effect were carried out.

After treatment, among the 19 pediatric patients, 18 cases showed primary healing and 1 case showed secondary healing. The follow-up period ranged from six months to seven and a half years. No cases of rabies occurred.

For the treatment of patients with maxillofacial dog bite wounds, the first stage debridement and suture can reduce the scar after operation and is beneficial to the recovery of face.

To compare the clinical effect on dental implant with minimally invasive flapless surgery of immediate implantation in maxillary anterior zone.

Sixty patients were divided into observation group and control group. The observation group was given with flapless surgery during immediate implant, the control group used traditional flap surgery immediate implant. The patients were followed up 3, 6, 12 months and compared the pink aesthetic index、alveolar bone absorption level and the satisfaction index.

The pink aesthetic index was significantly higher than that in control group in 3, 6 and 12 month (P＜0.05). At the same time, the satisfaction index (87%) was also significantly higher than that in control group (74%). The alveolar bone absorption were lower than that in control group (P＜0.05).

Flapless surgery of anterior maxillary teeth immediate implant can better improve the effect of both soft and hard tissue which also meets the needs of patients. Such method is worthy of recommendation.