The stock alloplastic temporomandibular joint implant can influence the behavior of the opposite native joint: A numerical study

Ramos, António; Mesnard, M.

doi:10.1016/j.jcms.2015.06.042

Cited by 22 publications

(14 citation statements)

References 43 publications

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“…18 The load on the contralateral TMJ after unilateral TMJR has been investigated using various mathematical models. 15,16,18,39 VanLoon et al 15 showed that unilateral TMJR resulted in a loading within a normal range on the contralateral TMJ. On the other hand, using finite element (FE) models, it was reported that a unilateral TMJR leads to a changed stress distribution in the contralateral TMJ.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, using finite element (FE) models, it was reported that a unilateral TMJR leads to a changed stress distribution in the contralateral TMJ. 16,18,39 However, the literature is inconsistent in this regard. While Jirman et al 18 measured an increased load on the contralateral natural TMJ of up to 491%, Bekcioglu et al 16 indicated a 15% increase in stress at the contralateral condyle and disc, while Ramos et al 39 stated that the strain distribution at the contralateral disc was reduced by 36%.…”

Section: Discussionmentioning

confidence: 99%

“…16,18,39 However, the literature is inconsistent in this regard. While Jirman et al 18 measured an increased load on the contralateral natural TMJ of up to 491%, Bekcioglu et al 16 indicated a 15% increase in stress at the contralateral condyle and disc, while Ramos et al 39 stated that the strain distribution at the contralateral disc was reduced by 36%. The fundamental FE models used in those studies could be the reason for the controversial results.…”

Section: Discussionmentioning

confidence: 99%

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Unilateral, Alloplastic Temporomandibular Joint Reconstruction, Biomechanically What Happens to the Contralateral Temporomandibular Joint?—A Prospective Cohort Study

Linsen

Schön

Mercuri

et al. 2021

Journal of Oral and Maxillofacial Surgery

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Purpose: Unilateral alloplastic total temporomandibular joint reconstruction (TMJR) might influence the contralateral side joint function. This study's purpose was to estimate the risk for contralateral TMJR and the jaw function of the contralateral untreated temporomandibular joint (TMJ).Patients and Methods: A prospective cohort study design was used for patients who underwent unilateral alloplastic TMJR. The primary predictor was time after TMJR, and the secondary predictors were pre-TMJR mandibular angle resection, prior ipsilateral TMJ surgeries, and TMJR design (custom, stock). The primary outcome variable was the need for contralateral TMJR. The secondary outcome variables were the results of jaw function-jaw tracking, maximum voluntary clenching, surface electromyography, and pressure pain thresholds (PPT) and patient's quality-of-life (oral healthrelated quality-of-life [OHrQoL]). Data were collected preoperatively (T0), and 1 year (T1), 2-3 years (T2), and $ 4 years postoperatively (T4). Analysis of variance with post hoc Tukey -HSD test and multiple linear regression analysis were used for statistical analysis. P < .05 was considered significant.Results: Thirty-nine patients were enrolled, 15 males and 24 females, with an average age of 48.9 AE 16.2 years. Two patients (5.1%) required a contralateral TMJR. Contralateral condylar motion, incisal laterotrusion, and protrusion slightly decreased, while incisal opening (P = .003), rotation angle (P = .013), opening deflection, surface electromyography activity, maximum voluntary clenching (P = .01), PPTs, and OHrQoL all increased. Pre-TMJR mandibular angle resection had an impact on PPTs and subjective outcomes and prior ipsilateral TMJ surgeries on the opening rotation angle.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Unilateral, Alloplastic Temporomandibular Joint Reconstruction, Biomechanically What Happens to the Contralateral Temporomandibular Joint?—A Prospective Cohort Study

Linsen

Schön

Mercuri

et al. 2021

Journal of Oral and Maxillofacial Surgery

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“…In our FEA, we applied the bone material properties and the musculatory system as described by F I G U R E 1 The primary and secondary reconstructions for patient 2. Notice the under-contouring of the patient-specific secondary reconstruction plate (orange) compared to the failed primary reconstruction plate (transparent) [Colour figure can be viewed at wileyonlinelibrary.com] Mesnard and Ramos (Mesnard & Ramos, 2016;Mesnard et al, 2011;Ramos, Ballu, Mesnard, Talaia, & Simões, 2011;Ramos & Mesnard, 2015;Ramos, Nyashin, & Mesnard, 2017). Their models are based on in vivo muscle force measurements and musculature information derived from dissections.…”

Section: Patientsmentioning

confidence: 99%

Novel finite element‐based plate design for bridging mandibular defects: Reducing mechanical failure

et al. 2020

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Introduction When the application of a free vascularised flap is not possible, a segmental mandibular defect is often reconstructed using a conventional reconstruction plate. Mechanical failure of such reconstructions is mostly caused by plate fracture and screw pull‐out. This study aims to develop a reliable, mechanically superior, yet slender patient‐specific reconstruction plate that reduces failure due to these causes. Patients and Methods Eight patients were included in the study. Indications were as follows: fractured reconstruction plate (2), loosened screws (1) and primary reconstruction of a mandibular continuity defect (5). Failed conventional reconstructions were studied using finite element analysis (FEA). A 3D virtual surgical plan (3D‐VSP) with a novel patient‐specific (PS) titanium plate was developed for each patient. Postoperative CBCT scanning was performed to validate reconstruction accuracy. Results All PS plates were placed accurately according to the 3D‐VSP. Mean 3D screw entry point deviation was 1.54 mm ( SD : 0.85, R : 0.10–3.19), and mean screw angular deviation was 5.76° ( SD : 3.27, R : 1.26–16.62). FEA indicated decreased stress and screw pull‐out inducing forces. No mechanical failures appeared (mean follow‐up: 16 months, R : 7–29). Conclusion Reconstructing mandibular continuity defects with bookshelf‐reconstruction plates with FEA underpinning the design seems to reduce the risk of screw pull‐out and plate fractures.

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“…Studies have shown that the natural condylar translational movement range is about 16 mm, whereas the artificial joint can only make a rotation movement <6 mm (Sonnenburg and Sonnenburg, 1985;Mercuri et al, 1995;Wojczyńska et al, 2016). This increases the burden on other muscles and the contralateral natural joint, leading to discomfort and/or internal derangement of the contralateral joint (Ramos and Mesnard, 2015). Our previous study also found out that more than 30% of patients with unilateral joint replacement complained about discomfort in their contralateral joints, including clicking, soreness, muscle tension, etc.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of Temporomandibular Joint Prosthesis for Lateral Pterygoid Muscle Attachment: A Preliminary Study

Zou

Zhong

Xiong

et al. 2021

Front. Bioeng. Biotechnol.

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Introduction: In temporomandibular joint (TMJ) replacement operation, due to the condylectomy, the lateral pterygoid muscle (LPM) lost attachment and had impact on the mandible kinematic function. This study aimed to design a novel TMJ replacement prosthesis for LPM attachment and to verify its feasibility by preliminary in vitro and in vivo experiments.Materials and Methods: An artificial TMJ prosthesis designed with a porous structure on the condylar neck region for LPM attachment was fabricated by a 3D printed titanium (Ti) alloy. A rat myoblast cell line (L6) was tested for adhesion and biocompatibility with porous titanium scaffolds in vitro by cell counting Kit-8 (CCK-8), scanning electron microscope (SEM), flow cytometry (FCM), real-time quantitative polymerase chain reaction (RT-qPCR), immunocytofluorescense, western blotting, etc. The porous titanium scaffolds were further embedded in the rat intervertebral muscle to analyze muscle growth and biomechanical strength in vivo. The novel artificial TMJ prosthesis was implanted to reconstruct the goat's condyle and LPM reattachment was analyzed by hard tissue section and avulsion force test.Results: L6 muscle cells showed good proliferation potential on the porous Ti scaffold under SEM scanning and FCM test. In RT-qPCR, immunocytofluorescense and western blotting tests, the L6 cell lines had good myogenic capacity when cultured on the scaffold with high expression of factors such as Myod1 and myoglobin, etc. In the in vivo experiment, muscles penetrated into the porous scaffold in both rats and goats. In rat's intervertebral muscle implantation, the avulsion force was 0.716 N/mm2 in 4 weeks after operation and was significantly increased to 0.801 N/mm2 at 8 weeks (p < 0.05). In goat condylar reconstruction with the porous scaffold prosthesis, muscles attached to the prosthesis with the avulsion force of 0.436 N/mm2 at 8 weeks, but was smaller than the biological muscle-bone attachment force.Conclusion: The novel designed TMJ prosthesis can help LPM attach to its porous titanium scaffold structure area for future function.

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The stock alloplastic temporomandibular joint implant can influence the behavior of the opposite native joint: A numerical study

Cited by 22 publications

References 43 publications

Unilateral, Alloplastic Temporomandibular Joint Reconstruction, Biomechanically What Happens to the Contralateral Temporomandibular Joint?—A Prospective Cohort Study

Unilateral, Alloplastic Temporomandibular Joint Reconstruction, Biomechanically What Happens to the Contralateral Temporomandibular Joint?—A Prospective Cohort Study

Novel finite element‐based plate design for bridging mandibular defects: Reducing mechanical failure

A Novel Design of Temporomandibular Joint Prosthesis for Lateral Pterygoid Muscle Attachment: A Preliminary Study

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