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Mosaddad SA, Hussain A, Tebyaniyan H. Exploring the Use of Animal Models in Craniofacial Regenerative Medicine: A Narrative Review. TISSUE ENGINEERING. PART B, REVIEWS 2024; 30:29-59. [PMID: 37432898 DOI: 10.1089/ten.teb.2023.0038] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
The craniofacial region contains skin, bones, cartilage, the temporomandibular joint (TMJ), teeth, periodontal tissues, mucosa, salivary glands, muscles, nerves, and blood vessels. Applying tissue engineering therapeutically helps replace lost tissues after trauma or cancer. Despite recent advances, it remains essential to standardize and validate the most appropriate animal models to effectively translate preclinical data to clinical situations. Therefore, this review focused on applying various animal models in craniofacial tissue engineering and regeneration. This research was based on PubMed, Scopus, and Google Scholar data available until January 2023. This study included only English-language publications describing animal models' application in craniofacial tissue engineering (in vivo and review studies). Study selection was based on evaluating titles, abstracts, and full texts. The total number of initial studies was 6454. Following the screening process, 295 articles remained on the final list. Numerous in vivo studies have shown that small and large animal models can benefit clinical conditions by assessing the efficacy and safety of new therapeutic interventions, devices, and biomaterials in animals with similar diseases/defects to humans. Different species' anatomical, physiologic, and biological features must be considered in developing innovative, reproducible, and discriminative experimental models to select an appropriate animal model for a specific tissue defect. As a result, understanding the parallels between human and veterinary medicine can benefit both fields.
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Affiliation(s)
- Seyed Ali Mosaddad
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmed Hussain
- School of Dentistry, Edmonton Clinic Health Academy, University of Alberta, Edmonton, Canada
| | - Hamid Tebyaniyan
- Department of Science and Research, Islimic Azade University, Tehran, Iran
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Reed DA, Zhao Y, Han M, Mercuri LG, Miloro M. Mechanical Loading Disrupts Focal Adhesion Kinase Activation in Mandibular Fibrochondrocytes During Murine Temporomandibular Joint Osteoarthritis. J Oral Maxillofac Surg 2021; 79:2058.e1-2058.e15. [PMID: 34153254 PMCID: PMC8500914 DOI: 10.1016/j.joms.2021.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/03/2021] [Accepted: 05/03/2021] [Indexed: 02/08/2023]
Abstract
PURPOSE Mechanical overloading is a key initiating condition for temporomandibular joint (TMJ) osteoarthritis (OA). The integrin-focal adhesion kinase (FAK) signaling axis is implicated in the mechanobiological response of cells through phosphorylation at Tyr397 (pFAK) but poorly defined in TMJ health and disease. We hypothesize that mechanical overloading disrupts TMJ homeostasis through dysregulation of FAK signaling. MATERIALS AND METHODS To assess if FAK and pFAK are viable clinical targets for TMJ OA, peri-articular tissues were collected from patients with TMJ OA receiving a total TMJ replacement. To compare clinical samples with preclinical in vivo studies of TMJ OA, the joints of c57/bl6 mice were surgically destabilized and treated with and without inhibitor of pFAK (iFAK). FAK signaling and TMJ OA progression was evaluated and compared using RT-PCR, western blot, immunohistochemistry, and histomorphometry. To evaluate mechanical overloading in vitro, primary murine mandibular fibrochondrocytes were seeded in a 4% agarose-collagen scaffold and loaded in a compression bioreactor with and without iFAK. RESULTS FAK/pFAK was mostly absent from the articular cartilage layer in the clinical sample and suppressed on the central condyle and elevated on the lateral and medial condyle in murine TMJ OA. In vitro, compressive loading lowered FAK/pFAK levels and elevated the expression of TGFβ, NG2, and MMP-13. iFAK treatment suppressed MMP13 and Col6 and elevated TGFβ, NG2, and ACAN in a load independent manner. In vivo, iFAK treatment moderately attenuated OA progression and increased collagen maturation. CONCLUSION These data illustrate that FAK/pFAK is implicated in the signaled dysfunction of excessive mechanical loading during TMJ OA and that iFAK treatment can moderately attenuate the progression of cartilage degeneration in the mandibular condyle.
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Affiliation(s)
- David A. Reed
- Department of Oral Biology, University of Illinois at Chicago, Chicago IL,Corresponding author: David A. Reed,
| | - Yan Zhao
- Department of Oral Biology, University of Illinois at Chicago, Chicago IL
| | - Michael Han
- Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago, Chicago IL
| | - Louis G. Mercuri
- Department of Orthopaedic Surgery, Rush University, Chicago IL, Adjunct Professor, Department of Bioengineering, University of Illinois at Chicago, Chicago, IL
| | - Michael Miloro
- Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago, Chicago IL
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Xiang T, Tao ZY, Liao LF, Wang S, Cao DY. Animal Models of Temporomandibular Disorder. J Pain Res 2021; 14:1415-1430. [PMID: 34079358 PMCID: PMC8166243 DOI: 10.2147/jpr.s303536] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 04/04/2021] [Indexed: 12/12/2022] Open
Abstract
Temporomandibular disorders (TMD) are a group of diseases in the oral and maxillofacial region that can manifest as acute or chronic persistent pain, affecting millions of people worldwide. Although hundreds of studies have explored mechanisms and treatments underlying TMD, multiple pathogenic factors and diverse clinical manifestations make it still poorly managed. Appropriate animal models are helpful to study the pathogenesis of TMD and explore effective treatment measures. At present, due to the high cost of obtaining large animals, rodents and rabbits are often used to prepare TMD animal models. Over the past decade, various animal models have been intensively developed to understand neurobiological and molecular mechanisms of TMD, and seek effective treatments. Although these models cannot carry out all clinical features, they are valuable in revealing the mechanisms of TMD and creating curative access. Currently, there are multitudinous animal models of TMD research. They can be constructed in different means and summarized into four ways according to the various causes and symptoms, including chemical induction (intra-articular injection of ovalbumin, collagenase, formalin, vascular endothelial growth factor, intramuscular injection of complete Freund’s adjuvant, etc.), mechanical stress stimulation (passive mouth opening, change of chewing load), surgical operation (partial disc resection, joint disc perforation) and psychological stress induction. Here, we summarize and discuss different approaches of animal models for determining neurophysiological and mechanical mechanisms of TMD and assess their advantages and limitations, respectively.
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Affiliation(s)
- Ting Xiang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi'an Jiaotong University College of Stomatology, Xi'an, Shaanxi, 710004, People's Republic of China.,Department of Orthodontics, Xi'an Jiaotong University College of Stomatology, Xi'an, Shaanxi, 710004, People's Republic of China
| | - Zhuo-Ying Tao
- Discipline of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, 999077, People's Republic of China
| | - Li-Fan Liao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi'an Jiaotong University College of Stomatology, Xi'an, Shaanxi, 710004, People's Republic of China
| | - Shuang Wang
- Department of Orthodontics, Xi'an Jiaotong University College of Stomatology, Xi'an, Shaanxi, 710004, People's Republic of China
| | - Dong-Yuan Cao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi'an Jiaotong University College of Stomatology, Xi'an, Shaanxi, 710004, People's Republic of China
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Liu Q, Yang H, Zhang M, Zhang J, Lu L, Yu S, Wu Y, Wang M. Initiation and progression of dental-stimulated temporomandibular joints osteoarthritis. Osteoarthritis Cartilage 2021; 29:633-642. [PMID: 33422706 DOI: 10.1016/j.joca.2020.12.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/14/2020] [Accepted: 12/22/2020] [Indexed: 02/02/2023]
Abstract
Temporomandibular joint (TMJ), a site that is often impacted by osteoarthritis (OA), is biomechanically linked with dental occlusion. Tissue responses in TMJ condyle to biomechanical stimulation could be investigated by intervention of the dental occlusion in animals. Unilateral anterior crossbite, an experimental malocclusion, has been demonstrated to induce TMJ-OA lesions, showing primarily as enhanced cartilage calcification and subchondral cortical bone formation at the osteochondral interface, causing the osteochondral interface thickening and stiffening. The changed interface would worsen the local biomechanical environment. At the cartilage side, the matrix degenerates. In the case of insufficient restoration of the matrix, the cells in the deep zone flow into the ones undergoing autophagy, apoptosis, and terminal differentiation while the cells in the superficial zone are promoted to differentiate to supply the loss of the deep zone cells. At the meantime, the bone marrow stromal cells are stimulated to bone formation in the subchondral cortical region which is uncoupled with the sites of the osteoclast-mediated resorption process that is predominantly observed at the subchondral trabecular bone region. Overall, the thickening and stiffening osteochondral interface, due greatly to the enhanced endochondral ossification in deep zone cartilage, should be a central pathological process that links with cartilage decay and subchondral bone remodelling in OA joints. The residual chondrocytes locating in the cartilage superficial zone have the progenitor-like qualities that can proliferate, and also differentiate into the deep zone chondrocytes, thus should be critical in progression and rehabilitation of TMJ-OA.
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Affiliation(s)
- Q Liu
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China
| | - H Yang
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China
| | - M Zhang
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China
| | - J Zhang
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China
| | - L Lu
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China
| | - S Yu
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China
| | - Y Wu
- Institute of Orthopedic Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, Shananxi, China
| | - M Wang
- The Key Laboratory of Military Stomatology of State and the National Clinical Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and Clinic of Temporomandibular Joint Disorders and Oral and Maxillofacial Pain, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, Shananxi, China.
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Reed DA, Yotsuya M, Gubareva P, Toth PT, Bertagna A. Two-photon fluorescence and second harmonic generation characterization of extracellular matrix remodeling in post-injury murine temporomandibular joint osteoarthritis. PLoS One 2019; 14:e0214072. [PMID: 30897138 PMCID: PMC6428409 DOI: 10.1371/journal.pone.0214072] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 03/06/2019] [Indexed: 12/28/2022] Open
Abstract
End stage temporomandibular joint osteoarthritis (TMJ-OA) is characterized by fibrillations, fissures, clefts, and erosion of the mandibular condylar cartilage. The goal of this study was to define changes in pericellular and interterritorial delineations of the extracellular matrix (ECM) that occur preceding and concurrent with the development of this end stage degeneration in a murine surgical instability model. Two-photon fluorescence (TPF) and second harmonic generation (SHG) microscopy was used to evaluate TMJ-OA mediated changes in the ECM. We illustrate that TPF/SHG microscopy reconstructs the three-dimensional network of key fibrillar and micro-fibrillar collagens altered during the progression of TMJ-OA. This method not only generates spatially distinct pericellular and interterritorial delineations of the ECM but distinguishes early and end stage TMJ-OA by signal organization, orientation, and composition. Early stage TMJ-OA at 4- and 8-weeks post-injury is characterized by two structurally distinct regions containing dense, large fiber collagens and superficial, small fiber collagens rich in types I, III, and VI collagen oriented along the mesiodistal axis of the condyle. At 8-weeks post-injury, type VI collagen is locally diminished on the central and medial condyle, but the type I/III rich superficial layer is still present. Twelve- and 16-weeks post-injury mandibular cartilage is characteristic of end-stage disease, with hypocellularity and fibrillations, fissures, and clefts in the articular layer that propagate along the mediolateral axis of the MCC. We hypothesize that the localized depletion of interterritorial and pericellular type VI collagen may signify an early marker for the transition from early to end stage TMJ-OA, influence the injury response of the tissue, and underlie patterns of degeneration that follow attritional modes of failure.
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Affiliation(s)
- David A. Reed
- University of Illinois at Chicago, Department of Oral Biology, Chicago, United States of America
| | - Mamoru Yotsuya
- University of Illinois at Chicago, Department of Oral Biology, Chicago, United States of America
- Tokyo Dental College, Department of Fixed Prosthodontics, Tokyo, Japan
| | - Polina Gubareva
- University of Illinois at Chicago, Department of Oral Biology, Chicago, United States of America
| | - Peter T. Toth
- University of Illinois at Chicago, Research Resources Center Imaging Core, Chicago, United States of America
| | - Andrew Bertagna
- University of Illinois at Chicago, Department of Oral Biology, Chicago, United States of America
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Almarza AJ, Brown BN, Arzi B, Ângelo DF, Chung W, Badylak SF, Detamore M. Preclinical Animal Models for Temporomandibular Joint Tissue Engineering. TISSUE ENGINEERING. PART B, REVIEWS 2018; 24:171-178. [PMID: 29121815 PMCID: PMC5994143 DOI: 10.1089/ten.teb.2017.0341] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/05/2017] [Indexed: 01/27/2023]
Abstract
There is a paucity of in vivo studies that investigate the safety and efficacy of temporomandibular joint (TMJ) tissue regeneration approaches, in part due to the lack of established animal models. Review of disease models for study of TMJ is presented herein with an attempt to identify relevant preclinical animal models for TMJ tissue engineering, with emphasis on the disc and condyle. Although degenerative joint disease models have been mainly performed on mice, rats, and rabbits, preclinical regeneration approaches must employ larger animal species. There remains controversy regarding the preferred choice of larger animal models between the farm pig, minipig, goat, sheep, and dog. The advantages of the pig and minipig include their well characterized anatomy, physiology, and tissue properties. The advantages of the sheep and goat are their easier surgical access, low cost per animal, and its high tissue availability. The advantage of the dog is that the joint space is confined, so migration of interpositional devices should be less likely. However, each species has limitations as well. For example, the farm pig has continuous growth until about 18 months of age, and difficult surgical access due to the zygomatic arch covering the lateral aspect of joint. The minipig is not widely available and somewhat costly. The sheep and the goat are herbivores, and their TMJs mainly function in translation. The dog is a carnivore, and the TMJ is a hinge joint that can only rotate. Although no species provides the gold standard for all preclinical TMJ tissue engineering approaches, the goat and sheep have emerged as the leading options, with the minipig as the choice when cost is less of a limitation; and with the dog and farm pig serving as acceptable alternatives. Finally, naturally occurring TMJ disorders in domestic species may be harnessed on a preclinical trial basis as a clinically relevant platform for translation.
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Affiliation(s)
- Alejandro J. Almarza
- Department of Oral Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania
- Center for Craniofacial Regeneration, University of Pittsburgh, Pittsburgh, Pennsylvania
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Bryan N. Brown
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Boaz Arzi
- Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California
| | - David Faustino Ângelo
- Stomatology Department, Faculty of Medicine, Centro Hospitalar de Setúbal, University of Lisbon, Lisbon, Portugal
| | - William Chung
- Oral and Maxillofacial Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Stephen F. Badylak
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Surgery, McGowan Institute of Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Michael Detamore
- Stephenson School of Biomedical Engineering, The University of Oklahoma, Norman, Oklahoma
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Akashi M, Hasegawa T, Takahashi S, Komori T. Four-Dimensional Computed Tomography Evaluation of Condylar Movement in a Patient With Temporomandibular Joint Osteoarthritis. J Oral Maxillofac Surg 2018; 76:304-313. [DOI: 10.1016/j.joms.2017.10.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/08/2017] [Accepted: 10/08/2017] [Indexed: 01/20/2023]
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Yıldız M, Çağatay Dayan S, Şakar O, Sülün T. Distraction of the temporomandibular joint condyle in patients with unilateral non-reducing disc displacement: Fact or fiction? Cranio 2017; 36:294-299. [PMID: 28738743 DOI: 10.1080/08869634.2017.1350337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES This study investigated the distractive effect of a unilateral pivot splint on patients with unilateral disc displacement without reduction. METHODS The study group was comprised of 18 patients who had no history of treatment with removable prosthetic restorations of molars, premolars, or canine teeth, and no previous treatment for temporomandibular disorder. Joint spaces measurements made on magnetic resonance images indicated the affected side to be narrower than the healthy side. Unilateral distraction splints were made for all patients. An ultrasonic motion analyzer was used to measure the vertical shift occurring on the affected side as patients closed their mouths with maximal force with the splint in their mouths. RESULTS Closing with maximal force on the unilateral distraction splint led to a noticeable downward movement of the affected condyle. DISCUSSION The findings of this study indicate that the TMJ condyle of patients with unilateral disc displacement without reduction may be unilaterally distracted if the articular space is narrowed.
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Affiliation(s)
| | - Süleyman Çağatay Dayan
- b Department of Prosthodontics, Faculty of Dentistry , Instanbul University , Istanbul , Turkey
| | - Olcay Şakar
- b Department of Prosthodontics, Faculty of Dentistry , Instanbul University , Istanbul , Turkey
| | - Tonguç Sülün
- b Department of Prosthodontics, Faculty of Dentistry , Instanbul University , Istanbul , Turkey
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Kaul R, O’Brien MH, Dutra E, Lima A, Utreja A, Yadav S. The Effect of Altered Loading on Mandibular Condylar Cartilage. PLoS One 2016; 11:e0160121. [PMID: 27472059 PMCID: PMC4966927 DOI: 10.1371/journal.pone.0160121] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 07/12/2016] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE The purpose of this study was to delineate the cellular, mechanical and morphometric effects of altered loading on the mandibular condylar cartilage (MCC) and subchondral bone. We hypothesized that altered loading will induce differentiation of cells by accelerating the lineage progression of the MCC. MATERIALS AND METHODS Four-week-old male Dkk3 XCol2A1XCol10A1 mice were randomly divided into two groups: (1) Loaded-Altered loading of MCC was induced by forced mouth opening using a custom-made spring; (2) Control-served as an unloaded group. Mice were euthanized and flow cytometery based cell analysis, micro-CT, gene expression analysis, histology and morphometric measurements were done to assess the response. RESULTS Our flow cytometery data showed that altered loading resulted in a significant increase in a number of Col2a1-positive (blue) and Col10a1-positive (red) expressing cells. The gene expression analysis showed significant increase in expression of BMP2, Col10a1 and Sox 9 in the altered loading group. There was a significant increase in the bone volume fraction and trabecular thickness, but a decrease in the trabecular spacing of the subchondral bone with the altered loading. Morphometric measurements revealed increased mandibular length, increased condylar length and increased cartilage width with altered loading. Our histology showed increased mineralization/calcification of the MCC with 5 days of loading. An unexpected observation was an increase in expression of tartrate resistant acid phosphatase activity in the fibrocartilaginous region with loading. CONCLUSION Altered loading leads to mineralization of fibrocartilage and drives the lineage towards differentiation/maturation.
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Affiliation(s)
- Raman Kaul
- Division of Orthodontics, University of Connecticut Health Center, Farmington, United States of America
| | - Mara H. O’Brien
- Division of Orthodontics, University of Connecticut Health Center, Farmington, United States of America
| | - Eliane Dutra
- Division of Orthodontics, University of Connecticut Health Center, Farmington, United States of America
| | - Alexandro Lima
- Division of Orthodontics, University of Connecticut Health Center, Farmington, United States of America
| | - Achint Utreja
- Division of Orthodontics, Indiana University Purdue University Indianapolis, Indianapolis, United States of America
| | - Sumit Yadav
- Division of Orthodontics, University of Connecticut Health Center, Farmington, United States of America
- * E-mail:
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Henderson SE, Tudares MA, Tashman S, Almarza AJ. Decreased Temporomandibular Joint Range of Motion in a Model of Early Osteoarthritis in the Rabbit. J Oral Maxillofac Surg 2015; 73:1695-705. [PMID: 25889371 DOI: 10.1016/j.joms.2015.03.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/16/2015] [Accepted: 03/16/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Analysis of mandibular biomechanics could help with understanding the mechanisms of temporomandibular joint (TMJ) disorders (TMJDs), such as osteoarthritis (TMJ-OA), by investigating the effects of injury or disease on TMJ movement. The objective of the present study was to determine the functional kinematic implications of mild TMJ-OA degeneration caused by altered occlusion from unilateral splints in the rabbit. MATERIALS AND METHODS Altered occlusion of the TMJ was mechanically induced in rabbits by way of a unilateral molar dental splint (n = 3). TMJ motion was assessed using 3-dimensional (3D) skeletal kinematics twice, once before and once after 6 weeks of splint placement with the splints removed, after allowing 3 days of recovery. The relative motion of the condyle to the fossa and the distance between the incisors were tracked. RESULTS An overall decrease in the range of joint movement was observed at the incisors and in the joint space between the condyle and fossa. The incisor movement decreased from 7.0 ± 0.5 mm to 6.2 ± 0.5 mm right to left, from 5.5 ± 2.2 mm to 4.6 ± 0.8 mm anterior to posterior, and from 13.3 ± 1.8 mm to 11.6 ± 1.4 mm superior to inferior (P < .05). The total magnitude of the maximum distance between the points on the condyle and fossa decreased from 3.6 ± 0.8 mm to 3.1 ± 0.6 mm for the working condyle and 2.8 ± 0.4 mm to 2.5 ± 0.4 mm for the balancing condyle (P < .05). The largest decreases were seen in the anteroposterior direction for both condyles. CONCLUSION Determining the changes in condylar movement might lead to a better understanding of the early predictors in the development of TMJ-OA and determining when the symptoms become a chronic, irreversible problem.
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Affiliation(s)
- Sarah E Henderson
- Graduate Student Researcher, Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA
| | - Mauro A Tudares
- Research Technician, Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA
| | - Scott Tashman
- Associate Professor, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA
| | - Alejandro J Almarza
- Associate Professor, Department of Bioengineering; Department of Oral Biology; and McGowan Institute of Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA.
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