1
|
Magalhães HIR, da Silva MD, Dos Santos Penna Neto AM, Penna ANM, Barto VH, Miglino MA, Hiraki KRN, de Assis Ribeiro L. Morphological description of the temporomandibular joint ligaments in domestic pigs. Anat Histol Embryol 2024; 53:e13097. [PMID: 39092540 DOI: 10.1111/ahe.13097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/18/2024] [Accepted: 07/21/2024] [Indexed: 08/04/2024]
Abstract
The temporomandibular joint (TMJ) ligaments play crucial roles in its function or dysfunction. The objective of this study was to describe the macro and microscopic morphology of these ligaments in domestic pigs, aiming to: (1) expand knowledge about the species; (2) provide anatomical references for advancing veterinary therapy and utilizing pigs as animal models in craniofacial research. Heads of young Sus scrofa domesticus were dissected to identify TMJ ligaments. Fragments of these ligaments were collected and processed for subsequent histological analysis with Haematoxylin and eosin staining. The results were qualitatively described. Pigs exhibited a TMJ reinforced by three individualized capsular ligaments: a lateral ligament, attaching to the ventral margin of the zygomatic process of the temporal bone and the lateral margin of the mandibular neck; a caudomedial ligament, attaching to the retroarticular process of the squamous part of the temporal bone and the caudomedial margin of the mandibular neck and a caudolateral ligament, attaching to the ventral margin of the base of the zygomatic process of the temporal bone and the caudal margin of the mandibular neck. The lateral ligament exhibited a greater constitution of dense irregular connective tissue, while the caudomedial and caudolateral ligaments showed a greater constitution of dense regular connective tissue. It is concluded that the TMJ of pigs presents one more ligament than horses, cattle, dogs, cats and what has been described for pigs themselves. We believe these results may contribute to the improvement of veterinary clinical and surgical therapy overall, as well as provide essential morphological information for a better interpretation and application of interspecies results in craniofacial research using pigs as an experimental model, as in the case of humans.
Collapse
Affiliation(s)
- Henrique Inhauser Riceti Magalhães
- School of Veterinary Medicine, Cruzeiro Do Sul University, São Paulo, Brazil
- Comparative Anatomy Research Group, School of Veterinary Medicine and Animal Sciences, Federal University of Uberlândia, Uberlândia, Brazil
| | - Mônica Duarte da Silva
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | | | - Victor Hugo Barto
- Comparative Anatomy Research Group, School of Veterinary Medicine and Animal Sciences, Federal University of Uberlândia, Uberlândia, Brazil
| | | | | | - Lucas de Assis Ribeiro
- Comparative Anatomy Research Group, School of Veterinary Medicine and Animal Sciences, Federal University of Uberlândia, Uberlândia, Brazil
- Federal University of Uberlândia, Uberlândia, Brazil
| |
Collapse
|
2
|
Ribeiro LDA, Magalhães HIR, Silva AF, Silva FOCE. Macroscopic, morphometric and tomographic features of the mandible of the collared peccary (Pecari tajacu) applied to clinical morpho-physiology and imaging. Anat Rec (Hoboken) 2022; 305:3178-3191. [PMID: 35143707 DOI: 10.1002/ar.24897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/01/2022] [Accepted: 02/04/2022] [Indexed: 11/10/2022]
Abstract
Veterinary dentistry is one of the specialties with the greatest potential to contribute to animal welfare; however, it requires a deep anatomical knowledge of the region to be treated. Therefore, the aim was to describe the macroscopic, morphometric and tomographic anatomy of the mandible of the collared peccary in order to provide support for a better understanding of local morpho-physiology and to improve clinical procedures and interpretation of imaging exams in live adult specimens. Four mandibles from wild adult Pecari tajacu were used. The mandibles were submitted to CT scanning, and comparative analyses were performed using multiplanar views. Afterwards, mandibular morphometry was conducted following the literature. Each hemimandible is composed of body, angle and ramus. The main bony landmarks are the mandibular foramen, three main lateral mental foramina, two medial mental foramina, condylar and coronoid processes, and mandibular and angular notches. The teeth are bunodont, and the dental formula is I3/C1/PM3/M3. All bony structures were observed both in the prepared mandible and in the tomographic images and their 3D reconstruction. No obvious differences were observed in the morphometric data between males and females, or between right and left hemimandibles. It can be concluded that the mandible of the collared peccary may be anatomically structured to favor its omnivorous feeding habit. CT scan proved to be an excellent tool for evaluating the teeth and mandible, and it also provides reliable 3D bone reconstructions that can be helpful in the structural identification and in planning of oral care in live adult animals. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Lucas de Assis Ribeiro
- Laboratory of Animal Anatomy, School of Veterinary Medicine, Federal University of Uberlândia, Uberlândia, Brazil
| | | | - Adriano Ferreira Silva
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | |
Collapse
|
3
|
Küchler EC, de Lara RM, Omori MA, Marañón-Vásquez G, Baratto-Filho F, Nelson-Filho P, Stuani MBS, Blanck-Lubarsch M, Schroeder A, Proff P, Kirschneck C. Effects of estrogen deficiency during puberty on maxillary and mandibular growth and associated gene expression - an μCT study on rats. Head Face Med 2021; 17:14. [PMID: 33888144 PMCID: PMC8061017 DOI: 10.1186/s13005-021-00265-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 04/12/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Estrogen is a well-known and important hormone involved in skeletal homeostasis, which regulates genes involved in bone biology. Some studies support that estrogen is important for craniofacial growth and development. Therefore this in vivo animal study aimed to investigate, whether and in which way low estrogen levels in the prepubertal period affect craniofacial development in the postpubertal stage and to quantify the gene expression of RANK, RANKL and OPG in cranial growth sites in ovariectomized estrogen-deficient rats during puberty. METHODS Control (sham-operated, n = 18) and ovariectomy (OVX, n = 18) surgeries were performed on 21-days-old female Wistar rats. Animals euthanized at an age of 45 days (pubertal stage) were used for gene expression analyses (n = 6 per group) and immunohistochemistry of RANK, RANKL and OPG. Animals euthanized at 63 days of age (post-pubertal stage) were used for craniofacial two-dimensional and three-dimensional craniofacial measurements using μCT imaging (n = 12 per group). RESULTS In the μCT analysis of the mandible and maxilla many statistically significant differences between sham-operated and OVX groups were observed, such as increased maxillary and mandibular bone length in OVX animals (p < 0.05). Condylar volume was also significantly different between groups (p < 0.05). The sham-operated group showed a higher level of RANK expression in the midpalatal suture (p = 0.036) and the RANKL:OPG ratio levels were higher in the OVX group (p = 0.015). CONCLUSIONS Our results suggest that estrogen deficiency during the prepubertal period is associated with alterations in the maxillary and mandibular bone length and condylar growth.
Collapse
Affiliation(s)
- Erika Calvano Küchler
- Department of Orthodontics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany. .,Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, Ribeirão Preto, SP, 14040-904, Brazil.
| | | | - Marjorie Ayumi Omori
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, Ribeirão Preto, SP, 14040-904, Brazil
| | - Guido Marañón-Vásquez
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, Ribeirão Preto, SP, 14040-904, Brazil
| | - Flares Baratto-Filho
- School of Dentistry, Univille University, R. Paulo Malschitzki, Joinville, SC, 89219-710, Brazil
| | - Paulo Nelson-Filho
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, Ribeirão Preto, SP, 14040-904, Brazil
| | - Maria Bernadete Sasso Stuani
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, Ribeirão Preto, SP, 14040-904, Brazil
| | - Moritz Blanck-Lubarsch
- Department of Orthodontics, University of Muenster, Albert-Schweitzer-Campus 1, Building W30, 48149, Münster, Germany
| | - Agnes Schroeder
- Department of Orthodontics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Peter Proff
- Department of Orthodontics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Christian Kirschneck
- Department of Orthodontics, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
| |
Collapse
|
4
|
Kämmerer T, Lesmeister T, Palarie V, Schiegnitz E, Schröter A, Al-Nawas B, Kämmerer PW. Calcium Phosphate-Coated Titanium Implants in the Mandible: Limitations of the in vivo Minipig Model. Eur Surg Res 2021; 61:177-187. [PMID: 33601367 DOI: 10.1159/000513846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 12/17/2020] [Indexed: 11/19/2022]
Abstract
INTRODUCTION We aimed to compare implant osseointegration with calcium phosphate (CaP) surfaces and rough subtractive-treated sandblasted/acid etched surfaces (SA) in an in vivo minipig mandible model. MATERIALS AND METHODS A total of 36 cylindrical press-fit implants with two different surfaces (CaP, n = 18; SA, n = 18) were inserted bilaterally into the mandible of 9 adult female minipigs. After 2, 4, and 8 weeks, we analyzed the cortical bone-to-implant contact (cBIC; %) and area coverage of bone-to-implant contact within representative bone chambers (aBIC; %). RESULTS After 2 weeks, CaP implants showed no significant increase in cBIC and aBIC compared to SA (cBIC: mean 38 ± 5 vs. 16 ± 11%; aBIC: mean 21 ± 1 vs. 6 ± 9%). Two CaP implants failed to achieve osseointegration. After 4 weeks, no statistical difference between CaP and SA was seen for cBIC (mean 54 ± 15 vs. 43 ± 16%) and aBIC (mean 43 ± 28 vs. 32 ± 6). However, we excluded two implants in each group due to failure of osseointegration. After 8 weeks, we observed no significant intergroup differences (cBIC: 18 ± 9 vs. 18 ± 20%; aBIC: 13 ± 8 vs. 16 ± 9%). Again, three CaP implants and two SA implants had to be excluded due to failure of osseointegration. CONCLUSION Due to multiple implant losses, we cannot recommend the oral mandibular minipig in vivo model for future endosseous implant research. Considering the higher rate of osseointegration failure, CaP coatings may provide an alternative to common subtractive implant surface modifications in the early phase post-insertion.
Collapse
Affiliation(s)
- Till Kämmerer
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany, .,Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Mainz, Mainz, Germany,
| | - Tony Lesmeister
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - Victor Palarie
- Clinic for Oral and Maxillofacial Surgery, University Nicolae Testemitanu, Chisinau, Moldova
| | - Eik Schiegnitz
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Mainz, Mainz, Germany
| | | | - Bilal Al-Nawas
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Mainz, Mainz, Germany
| | - Peer W Kämmerer
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Mainz, Mainz, Germany
| |
Collapse
|
5
|
Petnehazy O, Donko T, Ellis R, Csoka A, Czeibert K, Baksa G, Zucker E, Repa K, Takacs A, Repa I, Moizs M. Creating a cross-sectional, CT and MR atlas of the Pannon minipig. Anat Histol Embryol 2021; 50:562-571. [PMID: 33529429 DOI: 10.1111/ahe.12657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 11/20/2020] [Accepted: 12/19/2020] [Indexed: 11/27/2022]
Abstract
PURPOSE The purpose of this study was to create a detailed cross-sectional anatomical reference atlas of the Pannon minipig by correlating good resolution CT and MR images with high quality cross-sectional anatomical images. According to the authors knowledge, no detailed anatomical atlas is available for the minipig. MATERIAL AND METHOD An adult female minipig was utilized for this purpose. The animal was placed in a PVC half tube, and CT generated images of 0.6 mm slice thickness and MR images of 1.41 mm slice thickness were obtained. The images covered the whole body from the most rostral portion of the snout to the tip of the tail. The CT and MR scans were aligned with frozen anatomical sections prepared with an anatomical band saw from the same animal and significant structures were identified and labelled. The terminology employed has been referenced from the Nomina Anatomica Veterinaria 6th edition-2017. FINDINGS AND CONCLUSIONS The resulting atlas consists of 109 anatomical slices and the corresponding 109 CT and 109 MR scans (altogether 327 images) and the nomenclature list for each image. Although this publication contains limited images of the resulted atlas, it is a reference source for anatomy education and clinical sciences. We are of the opinion that more comprehensive and especially online available interactive atlases should be prepared using similar methodology.
Collapse
Affiliation(s)
- Ors Petnehazy
- Medicopus Nonprofit Ltd, Kaposvar, Hungary.,Kaposvar Campus, Szent Istvan University, Kaposvar, Hungary
| | - Tamas Donko
- Medicopus Nonprofit Ltd, Kaposvar, Hungary.,Kaposvar Campus, Szent Istvan University, Kaposvar, Hungary
| | - Rosie Ellis
- The Veterinary Referral & Emergency Centre, Godstone, England
| | - Adam Csoka
- Medicopus Nonprofit Ltd, Kaposvar, Hungary.,Kaposvar Campus, Szent Istvan University, Kaposvar, Hungary
| | - Kalman Czeibert
- Department of Ethology, Institute of Biology, Eötvös Loránd University, Budapest, Hungary
| | - Gabor Baksa
- Department of Anatomy, Histology and Embryology, Semmelweis University of Medical Sciences, Budapest, Hungary
| | - Eric Zucker
- Veterinary Medicine Program, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Krisztina Repa
- Radiation Oncology, Research and Teaching Center, Moritz Kaposi General Hospital Dr. József Baka Diagnostic, Kaposvar, Hungary.,Moritz Kaposi General Hospital, Kaposvar, Hungary
| | | | - Imre Repa
- Medicopus Nonprofit Ltd, Kaposvar, Hungary.,Radiation Oncology, Research and Teaching Center, Moritz Kaposi General Hospital Dr. József Baka Diagnostic, Kaposvar, Hungary
| | | |
Collapse
|