The injection overmolding technique is a repurposed adaptation of the decades old “snow plow” technique wherein uncured flowable resin liner is placed and adapted to the tooth surface followed by an increment of denser, nano-filled aesthetic composite resin.

Upon dispensing the paste composite, the uncured flowable material further disperses into a very thin layer as it is displaced by the stiffer, more viscous composite to form a gap and void-free intimate adaptation to the tooth.

The two materials are co-polymerized with a single application of the curing light to form a seamless, monolithic ingot which is then shaped into a natural looking, stain-resistant, and long-lasting tooth form that lives in health and harmony with the soft tissue.

Traditional solutions such as porcelain veneers or full coverage crowns require 7-72% tooth reduction and multiple appointments to prepare and fit. In contrast, injection overmolding can be a completely additive, single-visit solution to common aesthetic dilemmas.

References

Ferracane, JL, Lawson, NC. Probing the hierarchy of evidence to identify the best strategy for placing class II dental composite restorations using current materials. J Esthet Restor Dent. 2021; 33: 39– 50.

Sarfati A, Tirlet G. Deep margin elevation versus crown lengthening: biologic width revisited. Int J Esthet Dent. 2018;13(3):334-356.

Edelhoff D, Sorensen JA. Tooth structure removal associated with various preparation designs for anterior teeth. J Prosthet Dent. 2002;87(5):503-509.