It is worth mentioning that within the included studies, some results were not positive on the influence of genetics on tooth impaction [ 42 , 43 ] other implied an indirect connection [ 35 , 37 , 39 , 42 ], while others found marginally significant associations [ 44 ].
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The sentences
The rs6504591 G/T variant in the WNT9B gene appeared to confer a twofold increased risk of impaction, however, the association did not reach statistical significance.