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The role of abutment tooth preparations and their modifications influencing retention in complete veneer restorations needs to be investigated further in detail. To estimate and compare the effectiveness of conventional and surface modified tooth preparation designs in providing retention in complete veneer restorations. An electronic search was conducted for scholarly articles discussing about retention in complete veneer restorations written in English or translated into English listed with pubmed ,Cochrane library, Science Direct, Wiley online library, Google scholar data bases, The Newyork Academy of Medicine Grey literature Report and Ingenta Connect till october 31st 2016 with suitable keywords. The database search yielded 57 articles out of which 42 articles were discarded after reading the abstract. Full texts were obtained for the remaining 15 articles. 9 articles were selected based on the inclusion criteria and were subjected to data extraction. The effect size was difference between the means of forces dislodging the crowns in the conventional and surface modified abutments. The meta analysis exhibited overall effect size z = 27.99 (p < 0.00001) at 95 % CI indicating a very high statistically significant difference between the conventional and surface modified tooth preparation for complete veneer crowns in the amount of retention provided. Based on the evidence provided by the literature ,Surface modified abutments for complete veneer restorations exhibited a greater the amount of retention than the conventionally prepared abutments. Hence abutment surface modifications during tooth preparation can be incorporated in complete veneer restorations in clinical situations demanding additional retention to ensure better clinical success.

Effect Of Tooth Surface Modifications Influencing Retention In Complete Veneer Restorations-a Systematic Review And Meta Analysis