Does Implant Staging Choice Affect Crestal Bone Loss?

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• 作者：Hakimeh Siadat ; DDS ; MS^? ; Mehrdad Panjnoosh ; DDS ; MS^&dagger ; ; Marzieh Alikhasi ; DDS ; MS^&Dagger ; ; ^{m_alikhasi@yahoo.com} ; Masoud Alihoseini ; DDS^§ ; ; Seyed Hossein Bassir ; DDS^¡Î ; Amir Reza Rokn ; DDS ; MS^¶ ;
• 刊名：Journal of Oral and Maxillofacial Surgery
• 出版年：2012
• 出版时间：February, 2012
• 年：2012
• 卷：70
• 期：2
• 页码：307-313
• 全文大小：1162 K

文摘

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Purpose

The purpose of the present study was to compare the crestal bone loss around implants placed according to either a 1-stage or 2-stage implant installation procedure using a digital subtraction radiography technique.

Materials and Methods

In the present randomized clinical trial, screw-shaped tapered implants were inserted in the posterior mandible of patients needing fixed partial dentures. In each edentulous area, according to the randomization table, 1 implant was inserted using a 1-stage procedure (group 1) and 1 was placed using a 2-stage approach (group 2). The implants were temporized with the relined denture after 2 weeks. All implants were functionally loaded with fixed partial dentures after 3 months. Crestal bone loss (primary outcome variable) was measured using a digital subtraction radiography technique. Standardized radiovisiographs were taken after implant insertion, after fixed partial denture installation (3 months after surgery), and after 6 and 12 months of functional loading. The data were analyzed using the Wilcoxon signed ranks test (¦Á = 0.05).

Results

Eleven patients (mean age 46.9 years, 3 women and 8 men) were included in the study. A total of 34 implants were inserted, 17 using a 1-stage protocol and 17 using a 2-stage protocol. Three months after implant placement, the 2-stage implants showed significantly more crestal bone loss (0.65 ¡À 0.71 mm) than the 1-stage implants (0.41 ¡À 0.53 mm; P = .02). However, after 6 and 12 months of functional loading, both groups showed comparable changes in bone level (P > .05).

Conclusions

No differences were found between 1-stage and 2-stage implant placement in crestal bone loss after 1 year of functional loading.