Surgical correction of pes varus deformity in dachshunds using three-dimensional-printed patient-specific guide system: nine tibiae in seven cases (2018-2022).

Objectives: To describe the use of a three-dimensional-printed patient-specific guide system for the treatment of distal tibial varus deformity in Dachshunds and retrospectively report the clinical and radiographic outcome.

Materials And Methods: Pes varus deformity in nine limbs of seven dachshunds was treated with corrective osteotomy using a three-dimensional-printed patient-specific guide system. Data from computed tomography were processed to obtain virtual 3D-models of the tibias, which were used for computer-aided design-based surgical planning, three-dimensional-printed patient-specific guide system design and evaluation of planned versus achieved tibial correction.

Clinical outcomes of 20 brachycephalic dogs with thoracolumbar spinal deformities causing neurological signs treated with spinal stabilization using 3D-printed patient-specific drill guides.

Objective: To describe the clinical outcomes for pugs and French bulldogs with congenital vertebral malformations, undergoing thoracolumbar spinal stabilization surgery using 3D-printed patient-specific drill guides. To evaluate the accuracy of pedicle screw placement in this group of dogs.

Study Design: Retrospective descriptive study.

Accuracy of correction of a hexapod frame, patient-specific osteotomy and reduction guides, and hinged circular external fixation in a 3D-printed canine antebrachial deformity model.

Objectives: This study aimed to objectively define whether human hexapod fixation (Maxframe), with or without the use of 3D-printed positioning guides, can correct a canine antebrachial deformity with greater accuracy than the clinically established techniques of 3D patient-specific osteotomy and reduction guides (3D-PSORG) or hinged circular external skeletal fixation (CESF).

Methods: CT of a canine antebrachium was manipulated to induce distal radial deformity of the valgus, external torsion, and procurvatum, each of magnitude 20. Five experiments were performed to correct the deformity via a distal radial and ulna opening osteotomy using: (1) A 3D-PSORG with the application of a locking plate, (2) hinged CESF, (3) Maxframe standard protocol, (4) Maxframe applied with patient-specific positioning guides (PSPGs), and (5) Maxframe with frame adjustment calculated from post-application CT.

Comparison of three-dimensional printed patient-specific guides versus freehand approach for radial osteotomies in normal dogs: Ex vivo model.

Objective: To compare the accuracy of three-dimensional (3D) printed patient-specific guide (PSG) with a freehand (FH) approach for radial osteotomies in ex vivo normal dogs.

Study Design: Experimental study.

Animals: Twenty four ex vivo thoracic limb pairs from normal beagle dogs.

Thoracolumbar Spinal Stabilization with Three Dimensional-Printed Drill Guides and Pre-Contoured Polyaxial Bone Plates.

Objective:  The aim of this study was to report new preoperative and intraoperative techniques performed for canine thoracic or lumbar spine kyphosis stabilization using three-dimensional-printed patient-specific drill guides, polyaxial titanium bone plates and drill stops, and to determine the accuracy of screw placement using these techniques.

Study Design:  Retrospective study, five client-owned dogs.

Results:  Three-dimensional-printed patient-specific drill guides and drill stops allowed safe drilling and screw placement in all of the cases, with (i) 84% of the screws graded as I (ideal placement) and 16% as IIa, IIIa or IIIb according to the modified Zdichavsky classification (partial penetration of medial pedicle wall, partial penetration of lateral pedicle wall and full penetration of lateral pedicle wall respectively), (ii) mean mediolateral deviation of ± 4.

Heteroanionic Control of Exemplary Second-Harmonic Generation and Phase Matchability in 1D LiAsSSe.

The isostructural heteroanionic compounds β-LiAsSSe ( = 0, 0.25, 1, 1.75, 2) show a positive correlation between selenium content and second-harmonic response and greatly outperform the industry standard AgGaSe.

A 3-Dimensional Printed Patient-Specific Surgical Guide to Facilitate Transsphenoidal Hypophysectomy in Dogs.

Objective: Hypophysectomy in dogs is a difficult surgery that requires specific learning and training. We aimed to evaluate the accuracy of a 3-dimensional printed patient-specific surgical guide to facilitate choosing the entry point in the basisphenoid bone before approaching the during transsphenoidal hypophysectomy in dogs.

Methods: Two canine cadavers and 8 dogs undergoing transsphenoidal hypophysectomy for Cushing's disease treatment, involving design and fabrication of a 3-dimensional printed guide.

Structure Tuning, Strong Second Harmonic Generation Response, and High Optical Stability of the Polar Semiconductors NaKAs.

The mixed cation compounds NaKAsSe ( = 0.8, 0.65, 0.

Lumbosacral intervertebral disk extrusions in 13 dogs.

Objective: To describe the clinical presentation, magnetic resonance imaging (MRI) findings, and outcome of dogs treated surgically for lumbosacral intervertebral disk extrusion (IVDE).

Study Design: Retrospective study.

Animals: Thirteen dogs.

Spectroelectrochemical and Computational Analysis of a Series of Cycloaddition-Retroelectrocyclization-Derived Donor-Acceptor Chromophores.

The [2+2] cyclcoaddition (CA) and subsequent retroelectrocyclization (RE) reactions are useful in constructing nonplanar donor-acceptor chromophores that exhibit nonlinear optical properties and intramolecular charge-transfer transitions. However, both the infrared (IR) and visible-near IR (vis-NIR) spectroelectrochemical responses of CA-RE-derived chromophores are rarely explored in depth. Reported in this contribution is a comprehensive IR and vis-NIR spectroelectrochemical study of the CA-RE adducts of DMAP-C-NAP of both tetracyanoethene (TCNE) and tetracyanoquinodimethane (TCNQ) and companion time-dependent density functional theory (TD-DFT) analysis of the bands observed.

Accuracy of Placement of Pedicle Screws in the Lumbosacral Region of Dogs Using 3D-Printed Patient-Specific Drill Guides.

Objective:  The aim of this study was to report the accuracy of pedicle screw placement using three-dimensional (3D)-printed, patient-specific drill guides in the lumbosacral region of dogs.

Study Design:  This was a retrospective study. Thirty-two pedicle screws were placed in five dogs.

Long-term outcomes after pantarsal arthrodesis with medial plate fixation without external coaptation in 30 dogs.

Objective: To report long-term outcomes of dogs treated with pantarsal arthrodesis (PTA) with medial plate fixation without external coaptation.

Study Design: Retrospective case series.

Animals: Client-owned dogs (n = 30).

Accuracy of three-dimensional printed patient-specific drill guides for treatment of canine humeral intracondylar fissure.

Objective: To determine the accuracy of three-dimensional printed patient-specific drill guides (3D-PDG) as treatment of humeral intracondylar fissures (HIF) in dogs.

Study Design: Retrospective consecutive case series.

Animals: Client-owned dogs with HIF treated with a 5-mm transcondylar screw (TCS) placed from medial to lateral with a 3D-PDG.

Accuracy of placement of pedicle screws in the thoracolumbar spine of dogs with spinal deformities with three-dimensionally printed patient-specific drill guides.

Objective: To determine the accuracy of pedicle screw placement in the thoracic spine of dogs with spinal deformities with three-dimensionally (3D) printed patient-specific drill guides.

Study Design: Retrospective study.

Sample Population: Six dogs in which sixty pedicle screws were placed in the thoracolumbar spine.

Accuracy of patient-specific three-dimensional-printed osteotomy and reduction guides for distal femoral osteotomy in dogs with medial patella luxation.

Objective: To compare precorrectional and postcorrectional femoral alignment following distal femoral osteotomy using patient-specific 3-dimensional (3D)-printed osteotomy and reduction guides in vivo and ex vivo.

Study Design: Prospective study.

Sample Population: Ten client-owned dogs and matching 3D-printed plastic bone models.

Crystal structures of 5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-decane cobalt(III) mono-phenyl-acetyl-ide and bis-phenyl-acetyl-ide.

Reported in this contribution are the synthesis and crystal structures of new mono- and bis-phenyl-acetyl-ides based on Co(DMC) (DMC is 5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-deca-ne). Chlorido-(5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)(phenyl-ethyn-yl)cobalt(III) chloride-aceto-nitrile-methanol (1/1/1), [Co(CH)Cl(CHN)]Cl·CHCN·CHOH, , and (5,12-dimethyl-1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)bis-(phenyl-ethyn-yl)cobalt(III) tri-fluoro-methane-sulfonate-di-chloro-methane (2/1), [Co(CH)(CHN)](CFSO)·CHCl, , were prepared under weak-base conditions in satisfactory yields. Single-crystal X-ray diffraction studies revealed that both and adopt a pseudo-octa-hedral symmetry in which the Cl-Co-C angles of and C-Co-C of range from 177.

A 3-dimensional-printed patient-specific guide system for minimally invasive plate osteosynthesis of a comminuted mid-diaphyseal humeral fracture in a cat.

Objective: To report the use of a 3-dimensional (3D)-printed patient-specific reduction guide system to facilitate minimally invasive plate osteosynthesis (MIPO) of a humeral fracture in a cat.

Study Design: Case report.

Animals: A 9-year-old male neutered domestic short hair cat weighing 4.

Accuracy of a patient-specific 3D printed drill guide for placement of cervical transpedicular screws.

Objective: To develop a patient-specific 3-dimensional (3D) printed drill guide for placement of cervical transpedicular screws and to assess its accuracy.

Study Design: Prospective case-series.

Sample Population: Thirty-two cervical pedicle screws (CPS) placed in 3 large breed dogs.

Bilateral shoulder arthrodesis in a Pekinese using three-dimensional printed patient-specific osteotomy and reduction guides.

Objective: To report the use of computer-aided design software for virtual surgical planning and design of three-dimensional printed patient-specific osteotomy and reduction guides for facilitation of bilateral shoulder arthrodesis in a dog.

Methods: A three-year-old male entire Pekinese was presented unable to walk due to bilateral severe medial shoulder instability. Computed tomographic data was processed to yield three-dimensional mesh representations of the humeri and scapulae which could be manipulated in computer-aided design software.

Highly Comminuted, Articular Fractures of the Distal Antebrachium Managed by Pancarpal Arthrodesis in 8 Dogs.

Objective: To describe the surgical management by pancarpal arthrodesis for highly comminuted articular fractures of the distal antebrachium in 8 dogs.

Study Design: Retrospective clinical case series.

Animals: Eight dogs.