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INTRODUCTION: Horizontal ridge defects are a common consequence of tooth loss. They present an esthetic problem, especially if theedentulous site is in the maxillary esthetic zone and indicated for implant placement.A novel system using ultrasonic waves to activate pins and meshes made of completely resorbable poly-D-L-lactic acid has been recentlyintroduced. It is commonly used in the augmentation of alveolar ridge defects, but has not been tried for guided soft tissue augmentation.OBJECTIVES: clinical evaluation of the efficacy of ultrasonic activated poly-D-L-lactic acid pins and meshes for guided soft tissueaugmentation of horizontal defects present around dental implants.MATERIALS AND METHODS: study comprised of eight patients having localized horizontal soft tissue defects around dental implants.‘Guided soft tissue augmentation’ technique was applied to manage these defects using ultrasonic activated poly-D-L-lactic acid pins andmeshes. Patients recorded visual analogue scores for the first two weeks post-operatively. The augmented defects were evaluated for soft tissuethickness and pink esthetic score at one and three months post-operatively.RESULTS: there was a statistically significant increase in soft tissue thickness and fill in all treated defects together with an improvement ofthe pink esthetic score when compared to the baseline values. Patients had a mean visual analogue score of (0.0 ± 0.0) as of the fifth postoperativeday.CONCLUSIONS: augmentation of horizontal soft tissue defects using ultrasonic activated poly-D-L-lactic acid pins and meshes is a lessinvasive and effective clinical procedure to increase soft tissue thickness around dental implants together with the reconstruction of gingivalcontours to match those of adjacent natural teeth.KEYWORDS: dental implants, esthetics, horizontal ridge defects, SonicWeld®, soft tissue

EVALUATION OF THE USE OF ULTRASONIC ACTIVATED POLY-D-L-LACTIC ACID PINS AND MESHES FOR HORIZONTAL SOFT TISSUE AUGMENTATION AROUND DENTAL IMPLANTS