Clinical Research Of The Implant Denture In Anterior Maxilla

ObjectiveTo evaluate the cumulative survival rate, crestal bone loss, peri-implant soft tissue parameters and the esthetic status around implants placed in anterior maxilla after five years in function.Methods1. Objects: From January 2002 to December 2006, 354 dental implants were placed in the anterior maxillary regions of 234 patients. All implants were restored by means of porcelain fused to metal crowns.2. Methods: The overall data including radiography, clinical examination and patient satisfaction investigation were collected during follow-up periods ranged from 7 to 62 months.3. Observed index: The conditions of implants survival rate, peri-implant soft and hard tissue and esthetics were evaluated using the cumulative survival rate, bone resorption,the modified plaque index (mPI), modified sulcus bleeding index(mBI), probing depth(PD), gingiva papilla index and satisfaction grade.4. Statistical analysis: Data were processed with SPSS 13.0.Results1. Only 5 of 354 implants were lost (cumulative survival rate = 97.9%).2. There were no statistical differences among different ways of operation (P>0.0 5).3. No significant differences in mean crestal bone loss were found among different years (P>0.0 5). 4. The index of mPLI in 67.7% patients was grade 0 or grade 1; The index of mBI in 64.8% patients was grade 0; mBI in 23.7% of patients was grade 1; PD in 97.1% of patients was less than 5mm.5. 19.8% gingival papilla achieved Jemt grade III. 91.7% patients were satisfied with the appearance.Conclusions1. Implantation is an effective method for patients losing upper anterior teeth. The cumulative survival rate is as high as 97.8%.2. There are no statistical differences among different ways of operation.3. No significant differences are found in mean crestal bone loss after five years in function.4. Most patients have good oral hygiene and no obvious inflammation is found in soft tissue around the implants.5. Only a few gingival papilla can reach the aesthetic requirements. We need to do more study to solve this kind of problem. While most of the patients involved in our study were satisfied with the appearance.