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Safe zone in anterior mandible related to the genial tubercle for implant osteotomy in a Chinese-Malaysian population: A CBCT study

Voon YS, Patil PG

J Prosthet Dent, 2018 Apr;119(4):568-573.
PMID: 28838820 DOI: 10.1016/j.prosdent.2017.05.011

STATEMENT OF PROBLEM: The genial tubercle is a clinically palpable landmark in the mandible and can be identified in cone beam computed tomography (CBCT). Its location can be used to measure the safe zone in the interforaminal region of the mandible. These measurements may be helpful for implant treatment planning in patients with complete edentulism.
PURPOSE: The purpose of this clinical study was to evaluate the safe distance in the interforaminal region of the mandible measured from the genial tubercle level for implant osteotomy in a Chinese-Malaysian population.
MATERIAL AND METHODS: A total of 201 Digital Imaging and Communications in Medicine (DICOM) files were selected for the study from the CBCTs of dentate or edentulous Chinese-Malaysian adult patients with ongoing or completed treatments. Measurements were made with implant planning software. The anatomy of the whole mandible was assessed in the coronal cross-sectional, horizontal view and in panoramic view. Measurements were obtained in millimeters on one side by locating and marking a genial tubercle and then marking the mesial margin of the mental foramen and the anterior loop of the inferior alveolar nerve. The corresponding points of these landmarks were identified on the crest of the mandibular ridge to measure the linear distances. All the measurement steps were repeated on the other side. The linear distance of 2 mm was deducted from the total distance between the genial tubercle and the anterior loop separately for left and right side measurements to identify the safe zone. The mixed 2-way analysis of variance (ANOVA) test was used to analyze side and sex-related variations.
RESULTS: The mean safe zone measured at the crestal level from the genial tubercle site on the left side of the mandible was 21.12 mm and 21.67 mm on the right side. A statistically significant (P

Matched MeSH terms: Mandible/anatomy & histology; Mandible/surgery*
Human evaluation in association to the mathematical analysis of arch forms: Two-dimensional study

Zabidin N, Mohamed AM, Zaharim A, Marizan Nor M, Rosli TI

Int Orthod, 2018 03;16(1):133-143.
PMID: 29478934 DOI: 10.1016/j.ortho.2018.01.009

OBJECTIVES: To evaluate the relationship between human evaluation of the dental-arch form, to complete a mathematical analysis via two different methods in quantifying the arch form, and to establish agreement with the fourth-order polynomial equation.
MATERIALS AND METHODS: This study included 64 sets of digitised maxilla and mandible dental casts obtained from a sample of dental arch with normal occlusion. For human evaluation, a convenient sample of orthodontic practitioners ranked the photo images of dental cast from the most tapered to the less tapered (square). In the mathematical analysis, dental arches were interpolated using the fourth-order polynomial equation with millimetric acetate paper and AutoCAD software. Finally, the relations between human evaluation and mathematical objective analyses were evaluated.
RESULTS: Human evaluations were found to be generally in agreement, but only at the extremes of tapered and square arch forms; this indicated general human error and observer bias. The two methods used to plot the arch form were comparable.
CONCLUSION: The use of fourth-order polynomial equation may be facilitative in obtaining a smooth curve, which can produce a template for individual arch that represents all potential tooth positions for the dental arch.

Matched MeSH terms: Mandible/anatomy & histology
Polymorphism in emergence of deciduous dentition: A cross-sectional study of Indian children

Kariya P, Tandon S, Singh S, Tewari N

J Investig Clin Dent, 2018 Feb;9(1).
PMID: 28349669 DOI: 10.1111/jicd.12266

AIM: The aim of the present study was to evaluate the timing and sequence of the eruption of deciduous teeth in Indian children.
METHOD: This cross-sectional study focused on children aged 5-36 months. One hospital was randomly selected from four geographic zones of the city. A total of 400 children from each hospital, fulfilling the inclusion criteria, constituted the sample. The examination was carried out by a single, trained examiner. The tooth was recorded as "present" or "absent" on the day of examination. The mean age of emergence was calculated using a probit model. Independent sample t-test was used to assess the statistical significance of differences in the mean age of tooth emergence.
RESULTS: The deciduous mandibular central incisor was the first tooth to erupt in the oral cavity (8.15±1.69 months). Girls showed delayed eruption compared to boys; however, no interarch variation was observed in the mean age of tooth eruption. There was also no difference in the sequence of eruption of deciduous teeth, as reported in other studies.
CONCLUSIONS: The present study establishes a chronological table for the eruption of deciduous teeth in Indian children. There was delayed eruption of deciduous teeth when compared to the reference ranges of Western populations.

Matched MeSH terms: Mandible/physiology*
Fulltext Selective occlusal features of primary dentiton in Malay children at a centre in Sungai Buloh

Fathinah Hanem Azamzaki, Nurhanis Baharuddin, Tandon, Shobha, Venkiteswaran, Annapurny

Compendium of Oral Science, 2018;5(1):18-25.
MyJurnal

Objectives:To determine the different occlusal characteristics in primary dentition of 3 to 6 year old Malay children and to create a preliminary database for future Malaysian studies as currently none of the studies has been conducted in Malaysian population regarding the occlusal features in primary dentition. Materials and method:The subjects were within the age ranging from 3 – 6 years old attending nurseries and kindergartens located within Sungai Buloh, Selangor. Sixty subjects were screened but only 47 fulfilled the criteria to be included in this study. Intra-oral examination was done to determine the terminal plane, canine relationship, overjet, overbite and primate space in the subjects. Results: Almost two thirds of the subjects (72.34%) presented with straight terminal plane. All but one subject were observed with Class I canine relationship. 61.7% subjects were with an ideal overjet and 53.19% of subjects had an ideal overbite. The mean value for primate space in the maxilla was 2.92mm and 1.60mm in the mandible. There was no significant difference between gender in all the parameters assessed. Conclusion: The results from the study shown that only few of the subjects had a tendency of malocclusion in their permanent dentition. However, a longitudinal study should be done to follow up their occlusal feature in the permanent dentition.

Matched MeSH terms: Mandible
Fulltext Effects of antihypertensive drugs on alveolar bone loss in patients with chronic periodontitis: a retrospective study

AL-Bayaty, F.H., Omar Emad Ibrahim, William, C., Khairuddin, N.A.

Compendium of Oral Science, 2018;5(1):26-36.
MyJurnal

Objective: This retrospective study aims to evaluate the possible effects of antihypertensive drugs on alveolar bone loss in patients with chronic periodontitis. Methods: 50 patients on antihypertensive drugs selected as the experimental group and 50 patients with chronic periodontitis with no known systemic illnesses as control group were randomly selected as the study samples. Orthopantomographs were obtained, calibration and assessment of alveolar bone loss was performed by using the computer software program available in the faculty, through radiographic linear measurement procedure. Premolars, first and second molars of both maxilla and mandible were measured from the most apical point to the cementoenamel junction for mesial and distal aspects in the form of millimetres and percentile of the root length. Data was statistically analyzed using independent t-test and Analysis of Covariance in SPSS Version 23 with significance at P-value, p

Matched MeSH terms: Mandible
Fulltext Comparative morphology and function of feeding appendages in food intake behaviour of the whiteleg shrimp, Litopenaeus vannamei, and the giant freshwater prawn, Macrobrachium rosenbergii

Kawamura, Gunzo, Bagarinao, Teodora Uy, Nur Syallinaz Seniman, Yong, Annita Seok-Kian, Lim, Leong-Seng

Borneo Journal of Marine Science and Aquaculture, 2018;2(1):26-39.
MyJurnal

Combining feeding appendage morphology and behavioural observation of the motion pattern of the feeding appendages clarified many aspects underlying the feeding processes of the giant freshwater prawn (Macrobrachium rosenbergii) and the marine whiteleg shrimp (Litopenaeus vannamei) in aquaria. The food intake behaviour was video recorded during eating pellet food, and pieces of fresh squid and fish. While M. rosenbergiitook pellet one by one, L. vannamei picked up many pellets at one time and held them at the mouth with the 3rd maxilliped endopods and the 1st walking legs. Both species used the right chelate walking legs rather than the left walking legs to pick up the food. The 3rd walking legs of L. vannameiwere longest and heaviest among the chelate walking legs but their major role was not for feeding but for feeding contests often in the form of aggression. While M. rosenbergii easily crunched pellets by the mandibles, L. vannamei did not crunch pellets due to the softer and not so strong mandibles and frequently spat out them, indicating that the present hard pellets are not suitable for L. vannamei. Both the species kept a piece of elastic fresh squid or fish flesh at the mouth and tore the food into small pieces with the help of repeated pulling down motion of the 3rd maxilliped endopods. However, the mandible teeth of the two spices were not sharp enough to gnaw off the fibrous muscle in one bite. The 2nd and 3rd maxilliped endopods were used for holding food at the mouth and did not contribute to mastication of food. The 2nd and 3rd maxilliped exopods exhibited the horizontal fanning motion, which caused a unidirectional water flow moving backwards in the gill chamber (visualized with milk). The maxilliped exopods were found to contribute not to feeding but ventilation. Based on the results obtained, development of softer pellets was recommended for L. vannamei.

Matched MeSH terms: Mandible
Fulltext Preliminary study of PAX9 single nucleotide polymorphism (rs8004560) in patients with Class II skeletal base malocclusion contributed by mandibular retrognatism

Muhammadazril Mohd Saad, Nur Amin Abd Rahman, Khairani Idah Mokhtar, Noraini Abu Bakar, Azrul Fazwan Kharuddin, Wan Rohani Wan Taib

Archives of Orofacial Sciences, 2018;13(2):1-7.
MyJurnal

Polymorphism in PAX9 (rs8004560), a gene responsible for craniofacial and tooth development, is often associated with Class II/Div2 malocclusion. This study aimed to detect the presence of PAX9 SNP (rs8004560) and to determine its genotype and allele distribution in Class II skeletal base malocclusion, contributed by retrognathic mandible, in the local Malaysian population. The association of PAX9 SNP (rs8004560) with Class II skeletal base malocclusion was also determined. A case control study was performed on 30 samples; 15 from Class II skeletal base malocclusion, and 15 from Class I skeletal base subject as control. Cephalometric measurements were performed prior to saliva samples collection. Genomic DNA was extracted from unstimulated saliva of all subjects, and the DNA was amplified using specific primers for marker rs8004560, followed by genotyping by sequencing. SHEsis online software was used to analyse Hardy-Weinberg Equilibrium (HWE) for cases and controls. Allelic and genotypic frequencies were compared between cases and controls. Significant difference in allele frequency was observed within the group whereby G allele was over-represented in the analysed population (p0.05). Although no genetic association between PAX9 SNP (rs8004560) with Class II skeletal base malocclusion was observed, significant difference in allele frequency observed might provide some indication in the involvement of PAX9 polymorphism in Class II skeletal base malocclusion contributed by retrognathic mandible. Further research utilising larger sample size will be required in order to determine the role of PAX9 gene in the aetiology of Class II skeletal base malocclusion observed in the local Malaysian population.

Matched MeSH terms: Mandible
Fulltext Rare Late Pleistocene-early Holocene human mandibles from the Niah Caves (Sarawak, Borneo)

Curnoe D, Datan I, Zhao JX, Leh Moi Ung C, Aubert M, Sauffi MS, et al.

PLoS One, 2018;13(6):e0196633.
PMID: 29874227 DOI: 10.1371/journal.pone.0196633

The skeletal remains of Late Pleistocene-early Holocene humans are exceptionally rare in island Southeast Asia. As a result, the identity and physical adaptations of the early inhabitants of the region are poorly known. One archaeological locality that has historically been important for understanding the peopling of island Southeast Asia is the Niah Caves in the northeast of Borneo. Here we present the results of direct Uranium-series dating and the first published descriptions of three partial human mandibles from the West Mouth of the Niah Caves recovered during excavations by the Harrissons in 1957. One of them (mandible E/B1 100") is somewhat younger than the 'Deep Skull' with a best dating estimate of c30-28 ka (at 2σ), while the other two mandibles (D/N5 42-48" and E/W 33 24-36") are dated to a minimum of c11.0-10.5 ka (at 2σ) and c10.0-9.0 ka (at 2σ). Jaw E/B1 100" is unusually small and robust compared with other Late Pleistocene mandibles suggesting that it may have been ontogenetically altered through masticatory strain under a model of phenotypic plasticity. Possible dietary causes could include the consumption of tough or dried meats or palm plants, behaviours which have been documented previously in the archaeological record of the Niah Caves. Our work suggests a long history back to before the LGM of economic strategies involving the exploitation of raw plant foods or perhaps dried and stored meat resources. This offers new insights into the economic strategies of Late Pleistocene-early Holocene hunter-gatherers living in, or adjacent to, tropical rainforests.

Matched MeSH terms: Mandible/anatomy & histology*
Fulltext Technical issues in craniomaxillofacial distraction osteogenesis: a case series

Khairul Bariah Chi Adam, Firdaus Hariri, Lim, Kwong Cheung, Syed Nabil, Aung, Lwin Oo, Zainal Ariff Abdul Rahman

International Medical Journal Malaysia, 2018;17(101):109-114.
MyJurnal

Distraction osteogenesis allows superior skeletal advancement compared to conventional surgical osteotomy. It can be considered as a reliable and predictable surgical procedure and is widely used to correct the craniomaxillofacial bone discrepancy. Nevertheless, the outcome is technically dependent and requires comprehensive peri-operative assessment, preparation, and precision in application. The objective of this study is to highlight some important technical issues in distraction osteogenesis when the technique is indicated in various craniomaxillofacial regions and at the same time to discuss the options of preventing and overcoming these technical complications based on our experience and relevant literature. Important technical issues on the application of distraction osteogenesis in 5 different craniomaxillofacial regions were selectively highlighted based on the completed cases in one centre. Potential complications and its prevention methods were documented and discussed. The 5 highlighted regions of craniomaxillofacial distraction osteogenesis were alveolar, mandibular, cleft maxilla, craniofacial and facial cleft. Technical issues and complications were mostly device related and associated with anatomical limitations and surgical technique. Nevertheless, these complications are preventable and can be appropriately managed. From the literature and our experience, the technical aspects vary according to its application in different craniomaxillofacial regions. Preventing the potential complications contribute to the success of its application. This article also discussed the concept of Ihsan application in the medical field, to achieve the best of treatment in terms of delivery and technical preparation for the patients.

Matched MeSH terms: Mandible
Finite element analysis and clinical complications in mandibular implant-overdentures opposing maxillary dentures

Khuder T, Yunus N, Sulaiman E, Dabbagh A

J Mech Behav Biomed Mater, 2017 11;75:97-104.
PMID: 28709037 DOI: 10.1016/j.jmbbm.2017.06.039

Denture fracture is a common clinical complication caused by improper material selection, design, or fabrication technique. This study aimed to investigate the effect of two attachment systems on fracture risk of the implant-overdentures (IOD) via finite element analysis (FEA), using the force distributions obtained from patients' occlusal analyses and to compare the obtained results with the clinical complications associated with these attachments. A three-dimensional jaw model comprised of the edentulous bones was constructed. Three types of mandibular prostheses including complete denture (CD) (model LCD), IOD with Locator attachment (model LID-L), and IOD with telescopic attachment (model LID-T), as well as a maxillary CD (model UCD) were assembled. The vertical occlusal forces at anterior and posterior quadrants were obtained from the patients wearing mandibular CDs or IODs. The FEA results were further compared with the mechanical failures of different prostheses observed at patient recalls. In overall, the fracture risk of mandibular prostheses was lower than the maxillary compartments. The UCD opposing LCD underwent higher strains than that opposing LID-L and LID-T, which was mostly concentrated at the anterior mid-palatal polished surface. On the other hand, LID-L showed the lowest strain, followed by LID-T, and LCD. The obtained results were consistent with the clinical complications observed in the patient recalls.

Matched MeSH terms: Mandible
Torus Mandibularis

Chaubal TV, Bapat R, Poonja K

Am J Med, 2017 10;130(10):e451.
PMID: 28528920 DOI: 10.1016/j.amjmed.2017.04.026
Matched MeSH terms: Mandible/abnormalities*; Mandible/pathology
Fulltext In vivo bone strain and finite element modeling of a rhesus macaque mandible during mastication

Panagiotopoulou O, Iriarte-Diaz J, Wilshin S, Dechow PC, Taylor AB, Mehari Abraha H, et al.

Zoology (Jena), 2017 10;124:13-29.
PMID: 29037463 DOI: 10.1016/j.zool.2017.08.010

Finite element analysis (FEA) is a commonly used tool in musculoskeletal biomechanics and vertebrate paleontology. The accuracy and precision of finite element models (FEMs) are reliant on accurate data on bone geometry, muscle forces, boundary conditions and tissue material properties. Simplified modeling assumptions, due to lack of in vivo experimental data on material properties and muscle activation patterns, may introduce analytical errors in analyses where quantitative accuracy is critical for obtaining rigorous results. A subject-specific FEM of a rhesus macaque mandible was constructed, loaded and validated using in vivo data from the same animal. In developing the model, we assessed the impact on model behavior of variation in (i) material properties of the mandibular trabecular bone tissue and teeth; (ii) constraints at the temporomandibular joint and bite point; and (iii) the timing of the muscle activity used to estimate the external forces acting on the model. The best match between the FEA simulation and the in vivo experimental data resulted from modeling the trabecular tissue with an isotropic and homogeneous Young's modulus and Poisson's value of 10GPa and 0.3, respectively; constraining translations along X,Y, Z axes in the chewing (left) side temporomandibular joint, the premolars and the m1; constraining the balancing (right) side temporomandibular joint in the anterior-posterior and superior-inferior axes, and using the muscle force estimated at time of maximum strain magnitude in the lower lateral gauge. The relative strain magnitudes in this model were similar to those recorded in vivo for all strain locations. More detailed analyses of mandibular strain patterns during the power stroke at different times in the chewing cycle are needed.

Matched MeSH terms: Mandible/physiology*
Relapse of B-cell acute lymphoblastic leukaemia presenting as right aural polyp with facial and mandibular nerves palsy

Shiun Chuen C, Md Daud MK, Che Jalil NA, Hazmi H

Med J Malaysia, 2017 10;72(5):318-320.
PMID: 29197892 MyJurnal

A patient presenting with an ear polyp is a common finding in otorhinolaryngology practice. The common causes include chronic otitis media and cholesteatoma. We report an adult female patient with a history of acute leukaemia presenting with chronic otitis media symptoms and right ear polyp. She was subsequently diagnosed as relapse of B-cell acute lymphoblastic leukaemia based on histopathological examination. The presentation may be similar to an inflammatory pathology of the middle ear, making it misleading.

Matched MeSH terms: Mandible/physiopathology*
Iatrogenic displacement of high-speed bur during third molar removal

Rajaran JR, Nazimi AJ, Rajandram RK

BMJ Case Rep, 2017 Sep 27;2017.
PMID: 28954756 DOI: 10.1136/bcr-2017-221892

Surgical removal of impacted mandibular third molar is a routine procedure in oral surgery. Various iatrogenic complications related to the procedure has been discussed well in the literatures before. Some of these complications are related to the wrong usage of instruments and techniques. Here we discuss a rare complication on a 42-year-old male, related to the use of high-speed handpiece drill in mandibular third molar removal in a general dental office setting. He was referred when a high speed tungsten carbide bur was accidentally broken and displaced into the mandibular bone during surgical procedure. It is not common to use a high-speed handpiece in impacted third molar removal. This iatrogenic complication could have been totally avoided with the use of proper equipment and technique; therefore raising awareness regarding wrong usage of instrument is vital to avoid similar incidents in the future.

Matched MeSH terms: Mandible*
Letter to the editor on the article "Impact on the upper airway space of different types of orthognathic surgery for the correction of skeletal class III malocclusion: A systematic review and meta-analysis"

Tan SK, Leung WK, Tang ATH, Zwahlen RA

Int J Surg, 2017 09;45:156-157.
PMID: 28433756 DOI: 10.1016/j.ijsu.2017.03.083
Matched MeSH terms: Mandible/surgery
Patient-reported outcome and its association with attachment type and bone volume in mandibular implant overdenture

Khalid T, Yunus N, Ibrahim N, Elkezza A, Masood M

Clin Oral Implants Res, 2017 May;28(5):535-542.
PMID: 26989853 DOI: 10.1111/clr.12831

OBJECTIVE: To determine oral health-related quality of life (OHRQoL) and denture satisfaction (DS) in patients provided with mandibular implant-supported overdentures (ISOD) retained by two different attachment types, and the association of mandibular bone volume with the change in patient-reported outcome, before and after implant treatment.
MATERIAL AND METHODS: Thirty-four patients (mean age 60.70  ±  8.7 years) received telescopic crown or locator attachments for ISOD and completed OHIP-14 (Malaysian version) and DS questionnaires, at baseline (T0 ) with new conventional complete dentures (CCD) and 3 months (T1 ) and 3 years (T2 ) after ISOD conversion. Mandibular bone volume was calculated from cone beam computed tomography (CBCT) datasets using Mimics software. Mean changes (MC) in OHIP-14 and DS at intervals were analyzed using the Wilcoxon signed-rank test and effect size (ES). The association of bone volume, implant attachment type, and other patient variables with the change in OHIP-14 and DS were determined using multivariate linear regression analysis.
RESULTS: The MC in OHIP-14 and DS scores from T0 to T1 and T2 showed significant improvement with moderate and large ES, respectively. Regression analyses for the change in OHIP-14 score from T0 to T2 showed significant association with implant attachment type (P = 0.043), bone volume (P = 0.004), and baseline OHIP-14 (P = 0.001), while for DS, the association was only significant with baseline DS score (P = 0.001).
CONCLUSION: Improvement in patients' OHRQoL and satisfaction with ISOD was associated with their baseline ratings. Mandibular bone volume had a stronger association for improvement in OHRQoL compared to type of attachment.

Matched MeSH terms: Mandible/pathology; Mandible/surgery
Association between occlusal force distribution in implant overdenture prostheses and residual ridge resorption

Khuder T, Yunus N, Sulaiman E, Ibrahim N, Khalid T, Masood M

J Oral Rehabil, 2017 May;44(5):398-404.
PMID: 28295492 DOI: 10.1111/joor.12504

This study aimed to investigate residual ridge resorption (RRR) of anterior and posterior maxillary and mandibular edentulous ridges, in patients treated with mandibular implant overdentures (IOD) and compare with conventional complete denture (CD) wearers, and to determine at each location, the association of RRR with the occlusal forces distribution and other patients' variables. The anterior and posterior RRR of IOD (six males, 17 females) and CD (12 males, 11 females) groups were determined using baseline and follow-up dental panaromic radiographs (DPT) (mean intervals 4 ± 1·8 years). The bone ratios were calculated using proportional area: anatomic to fixed reference areas and mean difference of ratios between the intervals determined RRR. The ridge locations included anterior and posterior maxillary and posterior mandibular arches. The T-Scan III digital occlusal system was used to record anterior and posterior percentage occlusal force (%OF) distributions. There were significant differences in anterior and posterior %OF between treatment groups. Two-way anova showed RRR was significant for arch locations (P = 0·005), treatment group (IOD versus CD) (P = 0·001), however, no significant interaction (P = 0·799). Multivariate regression analyses showed significant association between RRR and %OF at anterior maxilla (P = 0·000) and posterior mandible (P = 0·023) and for treatment groups at posterior maxilla (P = 0·033) and mandibular areas (P = 0·021). Resorption was observed in IOD compared to CD groups, with 8·5% chance of less resorption in former and 7·8% in the latter location. Depending on arch location, ridge resorption at various locations was associated with occlusal force distribution and/or treatment groups (implant prostheses or conventional complete dentures).

Matched MeSH terms: Mandible/pathology*
Fulltext Compound Odontoma in Anterior Mandible-A Case Report

Uma E

Malays J Med Sci, 2017 May;24(3):92-95.
PMID: 28814937 DOI: 10.21315/mjms2017.24.3.11

Odontomas are the most common odontogenic hamartomas worldwide. Depending on the level of organisation of the tissues inside, these can be differentiated into compound type or complex type. As these are asymptomatic and do not cause any changes in the bone, they are often diagnosed during the routine dental examination. Complex odontomas are commonly found to occur in posterior mandible while compound odontomas are found in the anterior maxilla. A nine-year-old female child reported for a routine dental check-up, when a missing left permanent mandibular lateral incisor [32] was noticed. Further investigations revealed compound odontoma and unerupted 32, which is an unusual location. Early detection of these tumours is essential to avoid lengthy corrective treatments.

Matched MeSH terms: Mandible
An Expansile Well-defined Radiolucency in Anterior Mandible: Case Presentation with Treatment Approach and Literature Update

Arora S, Urs AB, Choudhary Z

Gulf J Oncolog, 2017 Jan;1(23):77-81.
PMID: 28272008

A 15-year-old Indian male patient presented with a history of pain and swelling in left mandible. Imaging studies revealed a well-defined unilocular radiolucency in the body of the mandible. Patient also gave the past history of the surgery of the jaws, which was histopathologically diagnosed as dentigerous cyst. Following this patient underwent incisional biopsy and later excisional biopsy. The histopathologic diagnosis for incisional biopsy was unicystic ameloblastoma but final diagnosis was dentinogenic ghost cell tumor for the excised tissue. To the best of our knowledge, this appears o be the first case of dentigerous cyst transforming into dentinogenic ghost cell tumor. The clinical presentation of the case, differential diagnosis and treatment modalities are being discussed.

Matched MeSH terms: Mandible*
Fulltext Unsplinted metal reinforced implant retained overdenture for an edentulous arch

Nur Hafizah Kamar Affendi, Nor Faharina Bt Abd Hamid

Compendium of Oral Science, 2017;4(1):40-46.
MyJurnal

Objective: This article discuss a clinical case of implant retained overdenture as a predictable and effective treatment for completely edentulous arch. Material and method: A patient with an edentulous maxilla and periodontically compromised teeth in the mandible was treated using a specific surgical and prosthodontic protocol. Patient was followed for 12 months postloading. Result: The implants are still osseointegrated and able to maintain healthy mucosa surrounding implants. The patient have verbally indicated that she is satisfied with the design that gives her comfort and function. Conclusions: It appears that unsplinted freestanding implants can be used as a predictable treatment for edentulous arch.

Matched MeSH terms: Mandible

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