Open Access Pub publishes peer-reviewed, free-to-read open-access articles. Showing
articles matching mandible — open any to read the full text,
or download the PDF or XML.
Feb 2019 DOI 10.14302/issn.2689-5773.jcdp-19-2611
Y. S. Lee CameronCorresponding author
Private Practice in Oral, Maxillofacial and Reconstructive Surgery. Aiea, HI 96701 USA. Clinical Professor of Surgery. Department of Periodontology and Oral Implantology. Temple University Kornberg School of Dentistry. Philadelphia, PA 19140 USA.
An anatomical variant of the Stafne bone cavity (SBC) located in the right subcondylar region of the mandible is presented. Such an occurrence of the SBC in this region near the parotid gland is considered rare and poses a diagnostic challenge for the dentist and radiologist. Knowledge of head and neck clinical anatomy and imaging studies such as plain film panoramic radiographs and cone beam CT scans can assist the clinician in arriving at a correct definitive diagnosis without surgical intervention.
Feb 2026 DOI 10.14302/issn.2473-1005.jdoi-25-5935
Romulus Calin FodorCorresponding author
The aim of this article is to present alternative possibilities for corrective intervention using corticobasal implants, following the failure of treatment with two stage implant in cases of extensive edentulism, multi-segmented edentulism, and the development of peri-implantitis 1 at the level of these implants. For this purpose, a case was selected involving a patient treated with two stage implants in a multi-segmented manner, in the distal regions of the maxilla and mandible, where the implants were affected after 12 years by peri-implantitis in proportions ranging from 20% to 100% in different areas of bone, with a predominance in the vestibular area. The decision was made to remove the affected two stage implants, as well as the remaining deciduous teeth, with or without periodontal conditions, but whose position on the arch made improperly rehabilitation, both functionally and aesthetically impossible, and made the second rehabilitation with polished corticobasal and compressive implants in immediate loading 2. Function and aesthetics of the gnathological apparatus were restored through definitive fixed metal-ceramic prosthetics on the support of corticobasal and compressive implants within 4 days from the beginning of the treatment, with the result being monitored over a period of 3 years and 3 months, and this evaluation is to continue over time. From a surgical perspective, for secondary rehabilitation with polished corticobasal and compressive implants, strategic positions in the maxillary and mandibular bones were used as follows: the fusion area of the maxillary bone with the sphenoid bone, the nasal cortex, the sinus cortex the lingual cortex distal to the mylohyoid line, and the interforaminal mandible area.34 These areas correspond to methods described in Consensus Number 6 in the IF The Foundation of Knowledge 5. In conclusion, the treatment with corticobasal, compressive polished implants is successful even in the case of a difficult clinical scenario like the one described for this patient 6. The reduced treatment time, along with the absence of the need for sinus lifts or bone grafts, makes it the ideal solution in any situation. The use of corticobasal implants, with fixation in the second/third cortical layer and an immediate loading protocol, should represent the primary solution in treating cases with poor bone representation, and no only as a “Corrective Intervention with Corticobasal® Implants”7.
Dec 2024 DOI 10.14302/issn.2997-2248.jwl-24-5308
Piumal HarshaCorresponding author
Interspecific predation within Odonata is a critical yet underexplored aspect of their ecological interactions. This short communication reports a novel observation of Ischnura senegalensis preying upon Agriocnemis pygmaea in rice fields at the Faculty of Agriculture, Rajarata University of Sri Lanka. Documented on March 22, 2024, during the reproductive stage of the rice field, the predatory event involved a female I. senegalensis feeding on the head of a female A. pygmaea. Predation, characterized by the use of mandibles and lasting at least 15 minutes, reveals significant predatory efficiency and behavioral specialization. This observation fills a gap in the understanding of I. senegalensis feeding behavior in Sri Lanka and contributes to the broader knowledge of Odonate predator-prey dynamics. The findings highlight the importance of these interactions in maintaining ecological balance and suggest further research into the impacts of such predatory behaviors on agricultural ecosystems.
Feb 2022 DOI 10.14302/issn.2577-2279.ijha-22-4094
Li KunCorresponding author
Department of Oral &Maxillofacial Surgery, Xiangya Stomatological Hospital & School of Stomatology, Central South University, Changsha, China.
Objectives To analyze the occurrence rate of bifurcated mandibular canal (BMC) by cone beam CT(CBCT) and summarise a new classification for further clinical work and academic communication. Method Randomly collected the CBCT images of 350 adult patients. Firstly, we analysed and summarized the BMCs into four types by the position of bifurcation point in the mandible. Second, we did statistics about occurrence. Then we have measured three kinds of distance of Type I and Type II. At last, we compared the advantages and disadvantages about different classifications. Results Among these 350 patients, we found 110 adult people with BMC which indicated the occurrence rate of BMC was 31.43%. The most common type was Type I, especially Type IB, and the least was Type III. Vertical distance between the apex of the second molar, the third molar and mandibular canal are 4.36±2.51 mm and 2.45±2.23 mm. Distance from the apex of two molars to the bifurcated spot are 15.87±6.82mm and 9.32±5.37mm. And the distance between the apex and retromolar foramen in Type I are 22.19±5.97mm and 15.82±4.68mm. Conclusion Comparing with former typing theory, we summarized a new classification which is simpler and more convenient, which should attach scholars’ attention to BMC during clinical work.
Nov 2021 DOI 10.14302/issn.2473-1005.jdoi-21-3988
Muhamad Abu-HusseinCorresponding author
Practice limited to Children's Dentistry, Aesthetics Dental Clinic, Athens, Greece
Edentulism is considered a poor health outcome and may compromise quality of life. Implant-supported overdentures provide a good opportunity for dentists to improve the quality of life and oral health. Atrophic mandible poses a significant challenge to successful oral rehabilitation with dental implants. The aim of this case report is to demonstrate the concept of immediate functional loading in the mandible using unsplinted implants to support a locator attachment supported overdenture.
Dec 2020 DOI 10.14302/issn.2473-1005.jdoi-20-3659
C SzuhanekCorresponding author
Department of Orthodontics, Faculty of Dental Medicine, University of Medicine and Pharmacy ‘Victor Babes’, Timisoara, Romania
Open bite malocclusion, due to it’s multifactorial etiology, has always been considered a difficult problem to treat. Often associated with transverse maxillary deficiency, this is a real challenge in the field of orthodontics. The traditional approach, for this type of anomaly, in adult patients, is orthognathic surgery and RME (rapid maxillary expansion). There are several approaches to the treatment of adult patients using digital technology. Mini-implant supported palatal expander limits the side effects of the conventional RME and is less invasive compared to orthognathic surgery. Precise and predictable mini-implant insertion, using a customized surgical guide, provides a safe therapeutic approach. This case report combines Cone-beam computed tomography (CBCT), laser scan superimposition, computer-aided design (CAD) and 3D printing in order to design and print a customized surgical guide for orthodontic mini-implant insertion. A CBCT scan was performed to determine the optimal site for mini-implants’ placement. Using the 3Shape Trios Intraoral Scanner the maxilla and the mandible were laser-scanned. Blue Sky Plan 4 software was used to design the surgical guide, and RayWare software was used for printing it. 4 mini-implants were inserted using a safe and predictable technique. The 3D technology represents the future of orthodontics, reducing the risks, chair-side time while providing the best treatment plan for the patient.
Sep 2019 DOI 10.14302/issn.2473-1005.jdoi-19-3042
Szuhanek CameliaCorresponding author
Department of Orthodontics, Faculty of Dental Medicine, University of Medicine and Pharmacy “Victor Babes”, Timisoara
The treatment of class III malocclusion differs depending on the age of the patient. In adult patients, alternatives include either orthodontic dentoalveolar compensation treatment or a combined ortho-surgical approach. The aim of this paper is to present the orthodontic and surgical treatment of a 24 year old adult patient with increased anterior face height, a class III skeletal pattern and mandibular asymetry. Previous orthodontic treatment with removable appliances obtained a 1 mm overbite and overjet. Intraorally, class III molar relationship was observed, proclined upper incisors, retroclined lower incisors and a deviated lower midline. The main complaint was facial esthetics which required surgical intevention. After pre-surgical orthodontic preparation the maxilla was repositioned by a Le Fort I osteotomy and the mandible was set back using the Obwegeser-Dal Pont method. Final assesment revealed both functional and esthetic dentofacial results. A combination of orthodontic treatment and orthognathic surgery is often required in adult patients with dental malocclusion and skeletal discrepancies.
Jan 2018 DOI 10.14302/issn.2577-2279.ijha-17-1903
Jacobs ReinhildeCorresponding author
OMFS IMPATH research group, Dept. Imaging & Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, 3000 Leuven, Belgium
The aim of the present study was to compare mandibular neurovascular canal anatomy in human and great apes by using cone beam computed tomography (CBCT). The anatomical variability of mandibular neurovascular canals (mandibular, incisive and lingual canals) of 129 modern humans and great apes (Homo, Pan and Gorilla) were analyzed by linear measurements on CBCT images. The Kruskal-Wallis non-parametric test and Dunn’s all pairs for joint ranks were applied to compare the variability of mandibular canals among these groups. Human, Chimpanzee and Gorilla groups showed significant differences in the dimensions of the mandibular canal, mental foramen, incisive canal, lingual canal and anterior mandibular bone width. Bifid mandibular canals and anterior loops were the anatomical variations most frequently observed in the Gorilla. Humans had a larger mental foramen and a distinctive incisive canal. The latter could not be identified in the Gorilla group. The variability in the anatomy within mandibles of human and non-human primates, shows different forms in the neurovascular structures. In comparison to the mandible of great apes, the incisive canal is suggested to be a feature unique to the human mandible.
Aug 2017 DOI 10.14302/issn.2379-8572.joa-17-1668
Seifi SafouraCorresponding author
Associate Professor of Oral and Maxillofacial Pathology, Oral Health Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran;
A Keratocystic Odontogenic Tumor (KCOT) is a benign odontogenic lesion that is well-known for its histopathological features and invasive clinical behaviors. KCOTs may be non-syndromic or syndromic, and the syndromic type presents a higher risk of recurrence and invasive behaviors. Non-syndromic KCOTs are uncommon and account for only 5% of the cases. The purpose of the present case report is to conduct clinical, radiographic and pathologic evaluations and treat a 37-year-old man with non-syndromic nevoid basal cell carcinoma. Syndromic and non-syndromic keratocysts present more invasive behaviors than the solitary type. The initial symptoms of syndromic keratocysts appear as multiple keratocysts of the mandible and maxilla that are diagnosed by a dentist; as a result, the diagnosis and treatment of the disease is very crucial.
Nov 2016 DOI 10.14302/issn.2474-7785.jarh-16-1275
Jonasson GretheCorresponding author
Dept. of Behavioral and Community Dentistry, Institute of Odontology at the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Bone quality is difficult to assess but the skeletal bone condition is reflected in mandibular trabecular bone, which is well imaged in periapical dental radiographs. The aim of this 12-year prospective cohort study was to test if marginal mandibular bone loss differs in women with varying trabecular bone structure. The sample consisted of 460 women (aged 38, 46, and 54 years) from the prospective population study of women in Gothenburg, Sweden. Marginal bone loss was assessed according to a five-graded scale in two surveys 12 years apart, and the mandibular bone structure was evaluated visually as sparse, mixed, and dense. The results showed that marginal bone loss was significantly correlated to mandibular bone structure (r= 0.20; p<0.001 at baseline, and r= 0.17; p<0.001 after 12 years). Significant differences in marginal bone loss between trabeculation groups were found, with the largest loss in the group with dense trabeculation. Age, smoking, number of missing teeth and trabecular bone structure explained 20-28% of the variation in marginal bone loss. The conclusion was that women with dense trabecular bone in the mandible suffered a stronger periodontal bone destruction when negative events occur, than the women with sparser trabeculation.
Jul 2016 DOI 10.14302/issn.2473-1005.jdoi-16-1159
Yezdani ArifCorresponding author
Sree Balaji Dental College and Hospital.
This case report reiterates the fact that a bilateral posterior crossbite with severe skeletal class II malocclusion in the growth period could be effectively treated by a comprehensive approach with a rapid palatal expansion appliance followed by fixed appliance therapy. A 14-year-old boy presented with a severe skeletal Class II malocclusion with an orthognathic maxilla, retrognathic mandible and a high mandibular plane angle with an Angles’ Class II division 1 subdivision malocclusion with maxillary constriction, increased overjet, deep bite and severe crowding of maxillary and mandibular incisors. A banded rapid palatal expansion appliance was initially given to correct the bilateral posterior cross bite and subsequently maxillary and mandibular first premolars were extracted and Roths’ Pre adjusted edgewise appliance therapy (0.022 x 0.28-inch slot) was strapped up to correct the severe tooth size-arch length discrepancy. The patient’s soft tissue profile and dentofacial esthetics improved dramatically with increased self-confidence and enthused self-esteem.