Journal Publications


Treace Medical Concepts is dedicated to advancing the understanding of the Lapiplasty® Procedure and its benefits to patients, surgeons, and the healthcare system through research studies and publications in the peer-reviewed literature.


Progression of Healing on Serial Radiographs Following First Ray Arthrodesis in the Foot Using a Biplanar Plating Technique Without Compression
Ray JJ, Koay J, Dayton PD, Hatch DJ, Smith WB, Santrock RD.
Dayton P, Santrock R, Kauwe M, Gansen G, Harper S, Cifaldi A, Egdorf R, Eisenschink JJ Foot Ankle Surg. [published online]

Summary: Multicenter, retrospective study of bone healing with accelerated weightbearing protocol in patients undergoing TMT or MTP fusions with Lapiplasty® biplanar plating. 195 patients were included with mean follow up of 9.5 months. Patients were allowed to begin weightbearing on the operative foot approximately at post-op day 5. Results were 97.4% of patients demonstrated successful bony fusion and 98.9% maintained a stable joint position over the course of the study.
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Multicenter Early Radiographic Outcomes of Triplanar Modified Lapidus Arthrodesis with Immediate Weight-Bearing
Ray JJ, Koay J, Dayton PD, Hatch DJ, Smith WB, Santrock RD.
2018 AOFAS Annual Meeting, Boston, MA [publication in process]

Summary: Multicenter, retrospective study of 72 hallux valgus patients (61 feet meeting 1-year endpoint) treated with the Lapiplasty® Procedure and early return to weight-bearing (average 10.5 days post-op). At average follow-up of 13.5 months, the results demonstrated 96.7% of patients maintained their 3-plane correction (intermetatarsal angle, hallux valgus angle, and tibial sesamoid position), and only 1.6% experienced a symptomatic nonunion complication.
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Triplane Hallux Abducto Valgus Classification
Hatch DJ, Santrock RD, Smith B, Dayton P, Weil L Jr.
J Foot Ankle Surg. 2018, 57:972–981.

Summary: Rather than the 2D hallux valgus classification systems traditionally referenced, this manuscript presents a novel 3-plane (3D) classification system for the evaluation and procedure selection for hallux valgus treatment.
Class 1 - No metatarsal rotation;
Class 2A - Metatarsal rotation without sesamoid subluxation;
Class 2B - Metatarsal rotation with sesamoid subluxation;
Class 3 - Metatarsus adductus bunion;
Class 4 - Degenerative (DJD) bunion.
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Biomechanical Characteristics of Biplane Multiplanar Tension-Side Fixation for Lapidus Fusion
Dayton P, Hatch DJ, Santrock RD, Smith B
J Foot Ankle Surg. 2018, 57:766-770.

Summary: Biomechanical study comparing the Lapiplasty® Plantar Python® tension-side fixation construct to Lapiplasty® Biplanar™ Plating, demonstrating a 17% improvement in maximum load to failure and a 103% increase in the cycles to failure (simulating post-operative weight-bearing).
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Evidence-Based Bunion Surgery: A Critical Examination of Current and Emerging Concepts and Techniques
Dayton, Paul D. (Ed.)
Springer International Publishing [Textbook]. 2018.

Summary: This textbook provides a critical examination of the traditions and techniques commonly taught for bunion surgery and contrasts them with new, evidence-based anatomic and surgical concepts (including the Lapiplasty® Procedure).
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Hallux Valgus Deformity and Treatment. A Three-Dimensional Approach: Modified Technique for Lapidus Procedure
Santrock RD, Smith B
Foot Ankle Clin. 2018, 23:281-295.

Summary: Manuscript reviews the 3-plane hallux valgus classification system, the novel surgical steps of the Lapiplasty® Procedure, the Lapiplasty® Biplanar™ plating biomechanical results, and presents clinical outcome data from a 49-patient multicenter study demonstrating 96% maintenance of 3-plane correction and 0% non-union rate at 4 months following an immediate weight-bearing protocol with the Lapiplasty® Procedure.
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Understanding Frontal Plane Correction in Hallux Valgus Repair
Smith WB, Dayton P, Santrock RD, Hatch DJ
Clin Podiatr Med Surg. 2018, 35:27-36.

Summary: Manuscript challenges traditional two-dimensional (2D) evaluation and management of the hallux valgus deformity, presenting a 3-plane hallux valgus classification system and the detailed surgical technique steps of the novel Lapiplasty® Procedure for triplanar hallux valgus correction.
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Comparison of Tibial Sesamoid Position on Anteroposterior and Axial Radiographs Before and After Triplane Tarsal Metatarsal Joint Arthrodesis
Dayton P, Feilmeier M
J Foot Ankle Surg. 2017, 56:1041-1046.

Summary: Clinical study of 21 feet at 5.2 month average follow-up demonstrating the ability of the Lapiplasty® Procedure to successfully correct the three-dimensional (3D) deformity (including metatarsal frontal-plane rotation) in 95.2% of cases, and also restore the intermetatarsal angle to 5.5°, hallux valgus angle to 7.3°, and tibial sesamoid position to 1.8.
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Intraoperative Multiplanar Alignment System to Guide Triplanar Correction of Hallux Valgus Deformity
Smith WB, Santrock RD, Hatch DJ, Dayton P
Techniques in Foot & Ankle Surgery. 2017, 16:175-82.

Summary: Manuscript presents a novel, instrumented approach to 3-plane (3D) Lapidus fusion (Lapiplasty® Procedure) for correction of the hallux valgus deformity, including indications/contraindications for 3-plane Lapidus arthrodesis, 3-plane x-ray views for preoperative planning, detailed surgical technique steps of the novel, instrumented Lapiplasty® Procedure, and potential complications.
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Comparison of the Mechanical Characteristics of a Universal Small Biplane Plating Technique Without Compression Screw and Single Anatomic Plate with Compression Screw
Dayton P, Ferguson J, Hatch D, Santrock R, Scanlan S, Smith B
J Foot Ankle Surg. 2016, 55:567-71.

Summary: Biomechanical study comparing Lapiplasty® Biplanar™ Plating to a commonly-used anatomic plate and screw Lapidus fixation construct, demonstrating significant improvements in biomechanical performance under maximum load to failure and cyclic loading (simulating post-operative weight-bearing).
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