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Fewer complications with screw-retained restorations

Screw-retained restorations experience significantly fewer technical and biological complications than cement-retained restorations according to a recent review.


This systematic review of studies1 published from 2000 to September 2012 provides a summary assessment of the survival outcomes and reported complications of screw- and cement-retained fixed reconstructions supported by dental implants.

When one- and two-piece abutments and crowns were grouped, survival and failure rate differences between these two retention systems were not found to be significant. However, isolating the results with two-piece screw-retained reconstructions showed a significantly lower estimated failure rate compared to cement-retained solutions (p=0.00). Furthermore, screw-retained restorations exhibited significantly fewer technical (7.50 vs. 9.81 events per 100 years, p=0.03) and biologic (4.81 vs. 7.01 events per 100 years, p=0.02) complications, mainly suppuration and fistula formation.

These outcomes were considered in the latest consensus statements recommending cases in which to use screw retention2.

More to explore


Wittneben et al., Int J Oral Maxillofac Implants. 2014;29 Suppl:84-98

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Wismeijer et al., Intl J Oral Maxillofac Implants. 2014;29 Suppl:137-40.

Read on PubMed