Journal of Prevention and Treatment for Stomatological Diseases ›› 2020, Vol. 28 ›› Issue (7): 438-442.doi: 10.12016/j.issn.2096-1456.2020.07.006

• Cinical Study • Previous Articles     Next Articles

Clinical observation of cement-retained and screw-retained implant-supported denture in edentulous patients

HU Chenchen1,LIU Xin2,TANG Xuyan1()   

  1. 1. Department of Prosthodontics, Affiliated Stomatological Hospital of Anhui Medical University, Hefei 230032, China
    2. Department of Implantology, Affiliated Stomatological Hospital of Anhui Medical University, Hefei 230032, China
  • Received:2019-10-08 Revised:2020-01-19 Online:2020-07-20 Published:2020-06-04
  • Contact: Xuyan TANG E-mail:txy8302@hotmail.com

Abstract:

Objective To evaluate the clinical effects of full-arch cement-retained implant-supported combined crowns and screw-retained implant-supported bridge dentures in complete or half edentulous patients. Methods A total of 25 patients with complete or partial edentulous dentures followed up for 1, 3, and 5 years in our hospital from June 2013 to June 2018 and were treated with Straumann bone horizontal implantation, cobalt-chromium stenting and cobalt-chromium porcelain restoration with cement-retained and screw-retained implant-supported fixed dental prostheses to evaluate the accumulative implant survival rate, accumulative prosthesis survival rate, mechanical complications, and biological complications in both groups. Results There were 25 complete or half edentulous patients who received 165 Straumann implants and 28 implant-supported fixed dental prostheses in this study. There were 11 cases with 69 implants in the cement group and 17 cases with 96 implants in the screw group. The accumulative implant survival rate was 100% in the cement group and 96.9% in the screw group. The accumulative prosthesis survival rate was 100% in both groups. The cumulative peri-implant mucositis rate was 23.2% in the cement group and 29.2% in the screw group, and the peri-implantitis rate was 6.8% in the cement group and 7.3% in the screw group. There was 1 case of porcelain collapse (n=1/11) and no screw of abutment loosening in the cement group and 4 cases of porcelain collapse (n=4/17) and 1 case of screw loosening in the screw group. No fracture of abutment was observed in either group. There was no difference in bone loss between the two groups in the first year (P > 0.05), and a higher rate of bone loss was found in the screw group in the third and fifth years (P < 0.05). There was no difference in the sulcus bleeding index(mSBI) between the two groups in the first year and the third year (P > 0.05) and a higher modified mSBI value in the cement group in the fifth year (P < 0.05). Conclusion The survival rates of the implant and prosthesis for cement-retained or screw-retained implant-supported fixed dental prostheses were both high, but there were more mechanical and biological complications in the traditional cobalt-chromium alloy screw-retainer group. The removal of residual adhesives must be reasonably considered when choosing the cement retention method.

Key words: edentulous, screw-retained, cement-retained, implant-supported fixed dental prostheses, marginal bone loss, peri-implant mucositis, peri-implantitis, implant survival rate, mechanical complications, biological complications

CLC Number: 

  • R782

Table 1

Comparison of mSBI between cement-retained group and screw-retained group"

Postoperation Group Implant(n mSBI (x ± s, score) t P
1 year Cement-retained group 39 1.60 ± 0.89 -0.216 0.832
Screw-retained group 39 1.70 ± 0.82
3 years Cement-retained group 19 1.55 ± 0.69 0.059 0.954
Screw-retained group 25 1.53 ± 0.72
5 years Cement-retained group 11 2.43 ± 0.79 2.696 0.013
Screw-retained group 22 1.56 ± 0.70

Table 2

Comparison of bone loss between the cement-retained group and screw-retained group"

Postoperation Group Implant(n Bone loss (x ± s, mm) t P
1 year Cement-retained group 39 0.43 ± 0.28 0.124 0.901
Screw-retained group 39 0.42 ± 0.26
3 years Cement-retained group 19 0.61 ± 0.48 -2.114 0.041
Screw-retained group 25 0.89 ± 0.39
5 years Cement-retained group 11 0.92 ± 0.53 -2.243 0.036
Screw-retained group 22 1.36 ± 0.41
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