Three-Dimensional Morphometry of Native Acetabulum in Relation to Design and Implantation of Canine Total Hip Replacements

Wu, Ching-Ho; Lin, Cheng‐Chung; Lu, Tung‐Wu; Yeh, Lih‐Seng

doi:10.4015/s1016237212500500

Cited by 5 publications

(19 citation statements)

References 17 publications

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“…In order for a larger range of abduction for the necessary ROM for daily activities of canines, a partial cut-away region of 60° relative to the opening surface was made on the dorsal rim of the acetabular component at the 12 o’clock position (Figure 1 ). This cut-away was chosen to be consistent with the natural morphology of the dorsal rim of the canine acetabulum [ 21 ], which would help minimize the possible impingement between the acetabular component and the femoral neck.…”

Section: Methodsmentioning

confidence: 99%

“…With the assistance of the graphic user interface of the software, a senior surgeon (WCH) incorporated the acetabular component of the THR into the right pelvis, replacing the natural acetabulum to simulate the standard surgical procedure [ 22 ] (Figure 2 a). The acetabular component was positioned such that its ventral opening surface was aligned with the best-fitted plane of the acetabular ventral rim to match with the native orientation, and such that the dorsal edge of the component was aligned with the dorsal rim of the acetabulum of the dog, giving the best angles of the lateral opening and the retroversion of the acetabular component [ 21 ]. The position of the acetabular component along the X-axis of the APCS was determined such that the mid-point of the line connecting the two junctions of the dorsal and ventral opening surfaces of the acetabular component matched that of the acetabular bone (Figure 2 a).…”

Section: Methodsmentioning

confidence: 99%

“…For the description of the motion of the hip, each model pelvis and femur was embedded with an anatomical coordinate system (ACS) (Figure 3 ). For the pelvic ACS, a reference plane called the posterior pelvic plane (PPP) was first defined as the plane containing the dorsal tops of the iliac crests and the dorsal tops of the ischial tuberosities [ 21 , 23 ]. The normal vector of the PPP was then defined as the Y-axis.…”

Section: Methodsmentioning

confidence: 99%

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Evaluation of ranges of motion of a new constrained acetabular prosthesis for canine total hip replacement

Lin

et al. 2013

BioMed Eng OnLine

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BackgroundTotal hip replacement (THR) is considered to be the most effective treatment option for advanced osteoarthritis of the hip in large breed dogs. However, a proportion of post-THR patients suffer prosthesis dislocation for various reasons, which may be addressed by a constrained acetabular prosthesis design. The study proposed a new THR with constrained acetabular component that aimed to decrease the incidence of postoperative dislocation while maintaining the necessary range of motion (ROM); and, through computer-simulated implantations, evaluated the ROM of the THR with and without malpositioning of the acetabular component.MethodsA new THR with a constrained acetabular component that had an inward eccentric lining and a 60° cut-out on the dorsal side was designed, and its computer-aided design models were implanted into the pelvic and femoral models reconstructed from the computed tomography data of six healthy Labrador Retriever dogs. The allowable and functional ROM of the implanted THR were determined via computer simulations. The contact patterns between the bone or the prosthetic components at extreme positions of the THR were analyzed. Influence of malpositioning of the acetabular component on the ROM was assessed.ResultsThe means (SD) of the functional ranges for flexion, extension, adduction, abduction, internal rotation and external rotation were 51.8° (6.6°), 163.3° (7.3°), 33.5° (5.7°), 74.0° (3.7°), 41.5° (8.3°) and 65.2° (9.9°), respectively. Malpositioning of the acetabular component by 20° in one direction was found to reduce ROM in other directions (reducing lateral opening: flexion: 12°, adduction: 20°, internal/external rotations: < 20°; increasing lateral opening: extension and abduction: < 16°; reducing retroversion: extension: < 20°, abduction: 15°, external rotation: < 20°; increasing retroversion: flexion: < 20°, abduction, adduction and internal rotation: 20°).ConclusionsFrom the computer-aided surgical simulations, the new THR was found to have sufficient functional ranges for flexion, extension, abduction, adduction and external rotation for Labrador Retrievers. Analysis of the malpositioning of the acetabular component suggests that accurate placement of the acetabular component is critical for achieving desirable ROM for daily activities.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Evaluation of ranges of motion of a new constrained acetabular prosthesis for canine total hip replacement

Lin

et al. 2013

BioMed Eng OnLine

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“…The independent variables were pelvic width, as described by the distance between the bilateral iliac crest markers, and pelvic length, as determined by the distance between the midpoints of the bilateral iliac crest markers and the midpoints of the bilateral ischial tuberosity markers. The parameters of the regression equations were determined using 24 CT-derived surface pelvic models (12 Labrador retrievers and 12 mixed-breed dogs) from our previous studies and database [15,36,37]. The y-coordinate (proximodistal direction) of the HJC was determined as the negative distance between the GT marker and the posterior pelvic plane of the pelvis [37], similar to the method used in [9].…”

Section: Multibody Kinematics Optimizationmentioning

confidence: 99%

“…The parameters of the regression equations were determined using 24 CT-derived surface pelvic models (12 Labrador retrievers and 12 mixed-breed dogs) from our previous studies and database [15,36,37]. The y-coordinate (proximodistal direction) of the HJC was determined as the negative distance between the GT marker and the posterior pelvic plane of the pelvis [37], similar to the method used in [9]. The SJC was predicted as the origin of the femoral AF.…”

Section: Multibody Kinematics Optimizationmentioning

confidence: 99%

Evaluation of a multibody kinematics optimization method for three-dimensional canine pelvic limb gait analysis

Lin

Chou

et al. 2020

BMC Vet Res

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Background: Skin marker-based three-dimensional kinematic gait analysis were commonly used to assess the functional performance and movement biomechanics of the pelvic limb in dogs. Unfortunately, soft tissue artefact would compromise the accuracy of the reproduced pelvic limb kinematics. Multibody kinematics optimization framework was often employed to compensate the soft tissue artefact for a more accurate description of human joint kinematics, but its performance on the determination of canine pelvic limb skeletal kinematics has never been evaluated. This study aimed to evaluate a multibody kinematics optimization framework used for the determination of canine pelvic limb kinematics during gait by comparing its results to those obtained using computed tomography model-based fluoroscopy analysis. Results: Eight clinically normal dogs were enrolled in the study. Fluoroscopy videos of the stifle joint and skin marker trajectories were acquired when the dogs walked on a treadmill. The pelvic limb kinematics were reconstructed through marker-based multibody kinematics optimization and single-body optimization. The reference kinematics data were derived via a model-based fluoroscopy analysis. The use of multibody kinematics optimization yielded a significantly more accurate estimation of flexion/extension of the hip and stifle joints than the use of single-body optimization. The accuracy of the joint model parameters and the weightings to individual markers both influenced the soft tissue artefact compensation capability. Conclusions: Multibody kinematics optimization designated for soft tissue artefact compensation was established and evaluated for its performance on canine gait analysis, which provided a further step in more accurately describing sagittal plane kinematics of the hip and stifle joints.

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Three-Dimensional Morphometry of the Canine Pelvis: Implications for Total Hip Replacement Surgery

Fracka

Zindl²,

Allen

2023

Vet Comp Orthop Traumatol

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Objectives Two-dimensional measurements of acetabular geometry are widely used for the assessment of acetabular component orientation following total hip replacement (THR). With the increasing availability of computed tomography scans, there is an opportunity to develop three-dimensional (3D) planning to improve surgical accuracy. The aim of this study was to validate a 3D workflow for measuring angles of lateral opening (ALO) and version, and to establish reference values for dogs. Methods Pelvic computed tomography scans were obtained from 27 skeletally mature dogs with no radiographic evidence of hip joint pathology. Patient-specific 3D models were built, and ALO and version angles were measured for both acetabula. The validity of the technique was determined by calculating intra-observer coefficient of variation (CV, %). Reference ranges were calculated and data from left and right hemipelves were compared using a paired t-test and symmetry index. Results Measurements of acetabular geometry were highly repeatable (intra-observer CV 3.5–5.2%, inter-observer CV 3.3–5.2%). Mean (± standard deviation) values for ALO and version angle were 42.9 degrees (± 4.0 degrees) and 27.2 degrees (± 5.3 degrees) respectively. Left-right measurements from the same dog were symmetrical (symmetry index 6.8 to 11.1%) and not significantly different. Conclusions Mean values of acetabular alignment were broadly similar to clinical THR guidelines (ALO of 45 degrees, version angle of 15–25 degrees), but the wide variation in angle measurements highlights the potential need for patient-specific planning to reduce the risk of complications such as luxation.

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Three-Dimensional Morphometry of Native Acetabulum in Relation to Design and Implantation of Canine Total Hip Replacements

Cited by 5 publications

References 17 publications

Evaluation of ranges of motion of a new constrained acetabular prosthesis for canine total hip replacement

Evaluation of ranges of motion of a new constrained acetabular prosthesis for canine total hip replacement

Evaluation of a multibody kinematics optimization method for three-dimensional canine pelvic limb gait analysis

Three-Dimensional Morphometry of the Canine Pelvis: Implications for Total Hip Replacement Surgery

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