Height Of Mandible Research Articles

Anthropometric Study of Correlation between the Selected Craniofacial Measurements with the Stature in Adult Bangladeshi Manipuri Males

Cephalofacial anthropometry can be useful for racial identification, forensic scientist, physical anthropologist, genetic counsellors as well as reconstructive surgery for the purposes of identification of an individuals and understanding human physical variation, gender and ethnicity especially with facial recognition as a tool in recent advances in biometrics. Stature is one of the important criteria for personal identification which has a proportional biological relationship with every parts of the human body like head, face, trunk, extremities and vertebral column. In this study, our main goal is find out the correlation between the selected craniofacial measurements with the stature in Adult Bangladeshi Manipuri males. This cross-sectional study was carried out in 100 healthy adult males from March 2017 to February 2018 in the Department of Anatomy, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh. Descriptive statistics and testing of hypotheses were used for the analysis using SPSS software (version 22.0). Here non- significant positive correlations of the stature with the mandible height and significant positive correlations of the stature with mandible breadth was found. The Mean (±SD) of Mandible height (sto-gn) was 4.44 (±0.69), Mandible breadth (go-go) was 11.45 (±0.57). This study will be anticipated to provide baseline quantitative data on the linear craniofacial measurements and the stature of adult Bangladeshi Manipuri males. And using larger samples with non-contact measurement technique will help in defining craniofacial anthropometric profiling of the adult Bangladeshi Manipuri males. Mugda Med Coll J. 2024; 7(1): 19-25

New Imaging Protocol to Assess Endotracheal Tube Placement: A Case-control Study.

After intubation, a frontal chest radiograph (CXR) is obtained to assess the endotracheal tube (ETT) position by measuring the ETT tip-to-carina distance. ETT tip location changes with neck position and can be determined by assessing the position of the mandible. As the mandible is typically not visualized on standard CXRs, we developed a new protocol where the mandible is seen on the CXR, hypothesizing that it will improve the accuracy of the ETT position assessment. Two groups of intubated patients studied (February 9, 2021 to May 4, 2021): CXR taken in either standard or new protocol (visible mandible required). Two observers independently assessed the images for the neck position (neutral, flexed, and extended) based on the mandible position relative to the vertebral bodies. With the mandible absent (ie, neck position unknown), we established terms: "gray zone" (difficult to assess the ETT position adequately) and "clear zone" (confident recommendation to retract, advance, or maintain ETT position). We compared the rate of confident assessment of the ETT in the standard versus the new protocol. Of 308 patients, 155 had standard CXRs and 153 had the new protocol. Interrater agreements for the distance between the ETT and the carina and mandible height based on vertebral bodies were 0.986 (P < 0.001) and 0.955 (P < 0.001), respectively. The mandible was visualized significantly more often (P < 0.001) with the new protocol (92%; 141/153) than with the standard protocol (21%; 32/155). By visualizing the mandible or the presence of the ETT within the clear zone, a reader could confidently assess the ETT position more often using the new protocol (96.7% vs 51.6%, P < 0.001). Mandible visibility on postintubation CXR is helpful for assessing the ETT position. The new protocol resulted in a significant increase in both visualizing the mandible and accurately determining ETT position on postintubation CXR.

A Comparison of Clinical Outcomes of Single Versus Two Miniplate Fixation of Parasymphysis Fracture

Background: Many methods have been discovered to treat the fracture of parasymphysis region of mandible i.e., using miniplates. However not many studies have been done to prove the good clinical outcomes of one miniplate versus two miniplates. Aim: The purpose of the study is to compare the clinical results of one miniplate vs two miniplate for the parasymphysis of mandible. Material and Methods: 20 patients were treated with single miniplate and 20 for 2 miniplates. Many outcomes variable after surgery such as post-surgical scar, mental nerve paresthesia, need for plate removal and interincisal opening were calculated and interpreted using chi square test. Results: All outcome variables such as post-surgical scar, mental nerve paresthesia, need for plate removal and interincisal opening did not show any statistically significant relation with both groups(P value &gt;0.05). Conclusion: Both types of miniplate ensure osseous healing but depending upon the individual factors such as mandible height and bio mechanics pattern should be considered before deciding scheme of treatment for an individual. Keywords: miniplate fixation, parasymphysis mandible, osteosynthesis.

Morphometric analysis of paired fibula and mandible for optimal fibular mandibular reconstruction in a Chinese population

To analyze the morphology of paired fibula and mandible aiming to choose optimal fibular segments for mandibular reconstruction in a Chinses population. A total of 118 cases of paired mandible and fibula was collected. All patients were received preoperative cone beam CT (CBCT) scans for mandibular evaluation and CT-angiographical (CTA) examination of the bilateral lower legs, respectively. The cross-sectional morphological differences between proximal (Side P), middle (Side M) and distal (Side D) segments of fibula and anterior, premolar and molar areas of mandible were compared. The most frequent cross-sectional shape at Side D, Side M and Side P portion of fibula was circular (75.4%), triangular (67.8%) and circular (49.2%), respectively. In anterior, premolar and molar areas of mandible, the most of the cross-section was s-shape (90.82%), straight (83.64%) and oblique (91.89%), respectively. The height and width of upper one third (W1) at Side M were significantly larger than those of Side D and Side P (p < 0.0001). There was significantly difference of width of lower one third (W2) among three groups (p < 0.0001). As for the height and widths of mandible, there was significant difference among anterior, premolar and molar regions (p < 0.0001). The rate of height between Side M of fibula and mandible (H (Side M/area)) was significantly larger than H (Side D/area) and H (Side P/area) (p < 0.01). The ratio of W1 between Side D of fibula and mandible (W1 (Side D/area)) was significantly larger than that of W1 (Side M/area) and W1 (side P/area) (p < 0.05). As for the ratio of W2 between fibula and mandible (W2 (plane/area)), there was significant difference among groups (p < 0.01). The distal and middle segments of fibula were suitable for reconstructing the anterior area of mandible and the proximal segment of fibula was more compatible with the premolar and molar areas of mandible.Clinical Relevance Presurgical morphometric analysis of paired fibula and mandible aids for optimal fibular-based mandibular reconstruction.

Phenotypic plasticity determines differences between the skulls of tigers from mainland Asia.

Tiger subspecific taxonomy is controversial because of morphological and genetic variation found between now fragmented populations, yet the extent to which phenotypic plasticity or genetic variation affects phenotypes of putative tiger subspecies has not been explicitly addressed. In order to assess the role of phenotypic plasticity in determining skull variation, we compared skull morphology among continental tigers from zoos and the wild. In turn, we examine continental tiger skulls from across their wild range, to evaluate how the different environmental conditions experienced by individuals in the wild can influence morphological variation. Fifty-seven measurements from 172 specimens were used to analyse size and shape differences among wild and captive continental tiger skulls. Captive specimens have broader skulls, and shorter rostral depths and mandible heights than wild specimens. In addition, sagittal crest size is larger in wild Amur tigers compared with those from captivity, and it is larger in wild Amur tigers compared with other wild continental tigers. The degree of phenotypic plasticity shown by the sagittal crest, skull width and rostral height suggests that the distinctive shape of Amur tiger skulls compared with that of other continental tigers is mostly a phenotypically plastic response to differences in their environments.

GENDER AND AGE DETERMINATION BY RADIOGRAPHIC ANALYSIS OF THE POSITION OF MENTAL FORAMEN IN NAVI MUMBAI POPULATION

Background - In physical and forensic anthropology the skull is extremely informative with regard to the identification of sex and age of an individual. It plays a vital role in establishing the identity of the deceased. The skull has been described as “The bone and core of the fleshy head and face” Gender and age determination plays a crucial role in the identification of human remains as it narrows the possibility for identification by 50 %. Many studies have observed the gender differences based on height of mandible, gonial angle, bigonial breadth and bicondylar breadth. But few studies have been done on gender and age determination based on the position of mental foramen. Aim: To evaluate gender and age differences based on the distance from superior and inferior borders of mental foramen to lower border of the mandible, along with height of the mandible in our population. Material and methods – Retrospective OPGs of subjects aged between 14 to 65 years taken for orthodontic and periodontic purposes were selected for the study. Out of the total 500 radiographs screened, 376 radiographs were considered for the study. The panoramic radiographs of patients were captured using Xtropan 2000 system and digitally processed. The distance from superior border of mental foramen (SMF) and inferior border of mental foramen (IMF) to the lower border of mandible (LBM) and height of mandible (AC – LBM) were measured. Result - The distance from SMF and IMF to LBM and height of mandible was more in males when compared to females, which was statistically significant which is justifying the sexual dimorphism. Also, values were useful for the deriving formula for age determination. Conclusion: The distances from SMF and IMF to the LBM and height of the mandible showed significant sexual dimorphism and helps in age determination

Topographic, Morphological and Morphometric Investigation of Mandible in Norduz Sheep

In order to contribute to animal welfare, veterinary maxillofacial surgery is one of the fields of science that requires deep anatomical knowledge about the region. Therefore, in this study, it was aimed to define the mandible by using macroanatomical, morometric and topographic methods to understand the morphophysiology of the mandible in Norduz sheep. Norduz sheep mandibles of 10 male animals were used. Mandibles were first examined with classical morphometric and topographic methods. It was seen that the mandible consisted of corpus, ramus and angulus parts. It was observed that the foramen mentale was oval and round in shape and in different numbers on the lateral edge of the mandible. It was observed that the foramen mandible was elliptical. According to the statistical analysis, mandible length was measured as 149.12±4.75 mm on the right side and 148.12±4.50 mm on the left side in Norduz sheep. Mandible height was analyzed as 160.81±4.72 mm on the right side and 160.74 mm on the left side. The distance of the foramen mandible to the infradental space was 127.85±4.62 mm on the right and 125.31±4.11 mm on the left. Diastema length was analyzed as 38.05±1.34 on the right side and 40.87±2.81 on the left side. The length of the premolar and molar teeth on the margo alveolaris of the mandible was 56.69±2.38 mm on the right side and 54.13±2.73 mm on the left side. The distance of the foramen mentale to the gonion caudale was analyzed as 118.34±4.22 mm on the right and 118.90±4.12 mm on the left. According to the statistical analysis, L17 measured over the right and left mandibles was statistically significant (p

The walled city and the dogs: the ritual and domestic role of canis lupus familiaris in Mayapán, Yucatán

This paper documents the role of domestic dogs (Canis lupus familiaris) in the domestic and ritual contexts of Mayapán. Mayapán was the last capital of the Postclassic Maya to be located on the Yucatán Peninsula. Dog remains have been recovered from ceremonial, elite, and lower-class contexts in the city. I analyze the distribution of skeletal elements and contexts of deposition in temples, halls, and houses, both in Iztmal Ch’en's monumental center and outlying ceremonial center.This paper presents the results of the identification of dog remains per structure, osteometric analysis, and estimations of weight and age. Counts of the number of identified specimens and the minimum number of individuals are performed, along with Chi-square, Fisher's exact test and principal coordinate analysis, to compare the presence of skeletal elements and the abundance of dog remains in each of the structures. Osteometric data from documented dog breeds, including the Mesoamerican common dog, the hairless dog, the Mayan short-faced dog, the tlalchichi, and the dog-wolf hybrid, are compared with measurements of maximum long bone length and the length and breadth of upper and lower first molars. An allometric formula used mandible height measurements at the middle of the first lower molar to predict body weight in grams. Observations of ossification in each skeletal element and dental eruption were compared to age charts to identify the ages of dogs recovered in Mayapán. This study shows that dogs were an important component of ritual life in Mayapán and were offered at ceremonies or feasts in the Templo Redondo group. It also demonstrates that the use of dogs in burial rituals and their consumption in domestic contexts was not restricted to elites.

O vorvaních (Physeter macrocephalus) ve sbírce Národního muzea v Praze (Mammalia: Artiodactyla)

A complete skeleton of the sperm whale (Physeter macrocephalus) from an animal ca. 13–14 m long is here reported as a new acquisition to the collection of mammals of the National Museum in Prague. This large new specimen was transferred to Prague museum from the Zoological museum of Senckenberg Natural History Collection Dresden, Germany, where a space enough was not available in the collection depositary rooms for its storage (the skull was stored outdoors, the rest of the skeleton in a taxidermy workshop). The skeleton originates from a stranded individual of the sperm whale discovered (along with two others) on the North Sea shore at Friedrichskoog (Holstein, Germany) on 15 January 2002. Selected measurements of the skull of this sperm whale are as follows: condylobasal length of skull 418 cm, orbital width of skull 196 cm, basal width of rostrum 144 cm, length of left mandible 374 cm, mandible height at the ramus mandibulae 58 cm. An annotated review of museum specimens of the great whales (= baleen whales and the sperm whale) in collections in the Czech Republic and a detailed description of the sperm whale specimens in the National Museum are added.

Radiomorphometric Indices and their Relation to Alveolar Bone Loss: A Panoramic Radiographic Study.

Aim:To assess the influence of gender and age on different parameters of alveolar bone loss using specific radiomorphometric indices on panoramic radiographs to aid in identifying patients with possible low bone mineral density (BMD).Materials and Methods:The present cross-sectional study included 80 subjects in whom mandibular cortical index (MCI), mandibular cortical width (MCW), panoramic mandibular index (PMI), alveolar bone loss (ABL), and bone height in 1st premolar (Hp) and 1st molar (Hm) were assessed to evaluate the alveolar bone loss.Results:The findings of the present study revealed a significant association between MCI and age for females with C2 and C3 categories being more common with advancing age. Also, a significant difference could be seen in relation to gender (p-value = 0.0315) for MCW with a concomitant decrease in values of MCW in females >60 years of age. The vertical bone height of the edentulous mandible at 1st premolar (Hp) (p-value = 0.0071) and 1st molar (Hm) (p-value = 0.0044) regions were also found to be more in males than females.Conclusion:Panoramic radiographic measurements provided valuable information for alveolar bone loss in terms of gender and age based on specific radiomorphometric parameters.

ANALYSIS OF RADIOMORPHOMETRIC INDICES IN POSTMENOPAUSAL PATIENTS WITH OSTEOPOROSIS: CASE REPORT AND LITERATURE REVIEW

Objectives. The aim of this case report is to present a single patient case superimposed on the literature knowledge in regard to mophometric mandibular variations observed on dental panoramic radiography and used to identify patients with low bone mass density (BMD). Case presentation. A 62 years old female patient reported to the Blident Help Dental Clinic, for specific visits and treatments, 3 years apart. Based on the digital panoramic radiography and DXA measurement, an osteoporosis evaluation with radiomorphometric indices was performed. Values for maximum condylar height, maximum coronoid height, projective height of the mandibular ramus, minimum ramus breadth and antegonial angle are higher on both sides. the values decreased for gonial angle, gonial index, mandible cortical width (MCW), superior and inferior mental height and panoramic mandibular indices on both sides. Bigonial distance also dicreased and the mandibular cortical index (MCI) changed from C2 category in 2017 to C3 category in 2020. Discussions. This postmenopausal pacient had a decline in MCW values which were lower than 3 mm (threshold to differentiate normal) on panoramic radiographs of women with low BMD. Antegonial Index had a decreased value and could be used as a prediction index for osteoporosis. MCI index changed from C2 to C3 in correlation with the changes of bone mass density in lumbar spine. Conclusions. MCI, MCW, antegonial index and bone density played an important role in determining significance of effects of lower BMD at postmenopausal on the mandibular ramus region.

Mandibular reconstruction using a new design for a patient-specific plate to support a fibular free flap and avoid double-barrel technique.

SUMMARYMandibular reconstruction is a primary concern for head and neck reconstructive surgeons because of the aesthetic restoration needs after ablative surgery, as well as for functional reasons: the mandible has a central functional role in speaking, swallowing and mastication. It is generally agreed that the gold standard for mandibular reconstruction is a bone free flap supported by a reconstructive titanium plate. The fibular flap represents the first choice for multi-segment mandibular reconstruction. The fibula, harvested as a single barrel graft, does not exhibit sufficient thickness to reach the original height of the native mandible; therefore, the positioning of dental implants is often deeper than that of the native alveolar crest. The aim of this study was to evaluate the positioning of the fibular free flap as it pertains to the restoration of vertical mandible height, by modifying the design of a 3D-printed titanium patient-specific implant (PSI). In this novel reconstructive workflow, the customised plate was projected to support the fibular flap at an alveolar bone position above the typical inferior mandibular border, and carried out on four patients. All patients were treated for benign neoplasms involving mandibular bone. Clinical outcomes and accuracy of the procedure are described. Our reconstructive proposal appears to be a valid alternative to the double-barrel technique in order to restore the vertical height of the reconstructed mandible.

Can Condylar Fracture Still Be Treated with Conservative Approach?? – A Retrospective Study

Background: Ideal management of mandibular condylar fractures remains controversial in maxillofacial trauma. Traditionally, conservative approach was implemented but recently ORIF (Open Reduction with Internal Fixation) has become prevalent. A difference of opinion has been acknowledged in the review of literature concerning the results achieved by open/closed reduction of fractures of the condyle in mandible. Research Objectives: To assess the preference of treatment for fractures of condyle and their indications, advantages, disadvantages and complications for open/closed reduction of fractures of condyle. Methodology: A 13-year retrospective study involving 56 patients who reported with fractures of condylar region were selected from 264 patients who experienced maxillofacial fractures. Out of them, seven were treated with ORIF, while 49 underwent closed reduction. Every patient was critically evaluated for identifying their indications, advantages, disadvantages, their effectiveness and complications of chosen interventions used in the management of condylar fractures. Findings: A male predominance was observed. Closed reduction with concomitant active physical therapy after inter-maxillary fixation gave similar results to that of open method. Conclusion: This study manifested that an appropriately followed conservative treatment provided similar clinical results when compared to ORIF for the management of condylar fractures. In cases with severe loss of height of mandible, surgical intervention is to be preferred to restore it. Further prospective randomized controlled trials with larger sample size are required to come to a decisive conclusion.

A Macroanatomic and Morphometric Study on the Hasak Sheep Mandible

The study was carried out to reveal some macroanatomical and morphometric values on the Hasak sheep mandible. In the study, eight reformed dead Hasak sheep mandibles from Konya Bahri Dagdas International Agricultural Research Institute were used. The length between 19 different points in the mandible of Hasak sheep was measured and the values obtained were compared with other sheep breeds. As a result of this comparison, it has been determined that the mandible length and mandible height values of Hasak sheep are higher than Hemsin, Morkaraman, Tuj, Mehraban, Iranian domestic sheep breeds and lower than that of Konya merino, Hasmer, Yankasa, Barbados Black Belly sheep. In addition, in other comparisons, it has been determined that the mandible measurement values of Hasak sheep are higher than some sheep breeds, while it is lower than some sheep breeds. These results are of clinical importance to assist in regional anesthesia of the mandibular and mental nerves, especially during surgical operation, tooth extraction and treatment in the mandible.

Mandibular residual ridge height in relation to age, gender and duration of edentulism in a Saudi population: A clinical and radiographic study

PurposeThe purpose of this clinical and radiographic study was to evaluate the effect of age, gender and duration of edentulism on the amount of mandibular residual ridge resorption in a Saudi population. Material and methodsPartially and completely edentulous Saudi patients (50 male and 64 female) attending the outpatient clinics at College of Dentistry, King Saud University, Riyadh, Saudi Arabia were included. Current age, gender of subjects and date of start of edentulism were recorded. Digital panoramic dental radiograph less than 1 year old of each patient was examined. The height of edentulous mandible was measured as described in the American College of Prosthodontists Prosthodontic Diagnostic Index (PDI) classification. Students t-test and ANOVA post hoc tests, Pearson’s correlation coefficient (r) and chi square (χ2) analysis were performed as indicated. Level of statistical significance was set at 0.05. ResultsMale patients showed a significantly greater mandibular bone height compared to female patients. Age and bone height were statistically significantly negatively correlated (p = 0.0001). However, age and mandibular bone height in only male patients was negatively correlated and reached statistical significance (p = 0.001) A negative correlation was observed between duration of edentulism and mandibular bone height in both genders, but was not statistically significant (p > 0.05). ConclusionsIn a Saudi population, men have greater mandibular bone height than women and also exhibit a negative correlation between age and mandibular bone height that is statistically significant. In contrast, women exhibited a negative correlation between age and mandibular bone height, but was not statistically significant.

An evaluation of classical morphologic and morphometric parameters reported to distinguish wolves and dogs

Morphological and morphometric bone variation between archaeological wolves and the oldest domestic dogs commonly are used to define species differences. However, reference data often have been based on small numbers, without robust statistical support. We consulted the literature on these matters in all possible languages and tested many of the proposed species differences by examining wolf and dog skeletons from several collections, accompanied by an extensive synthesis of existing literature. We thus created large reference groups, assessing data distributions and variability. We examined mandible height, width, length, and convexity; contact points of the skull on a horizontal plane; caudal shifting of the border of the hard palate; skull size; carnassials tooth size reduction; micro-anatomical differences in teeth, snout, and skull height; and snout length and width.Our results show that skull length and related size; skull height; snout width; orbital angle; P4 and M1 mesio-distal diameter can help (albeit to a limited extent) to distinguish the oldest archaeological dogs from wolves. Based on our observations, we re-evaluated recent large Pleistocene canids reported as Paleolithic dogs and concluded instead that they fit well within the morphomentric distributions seen with Pleistocene wolves.The research presented here reflects the recent trend to critically re-evaluate axiomatic assumptions about wolf-dog differences, and to rephrase the morphological and morphometric definition of an early archaeological dog in a more suitable manner.These results are important to the international archaeological community because they place historical reports in a newer context, and create a robust (although narrow) framework for further evaluation of archaeological dogs and wolves.

TMJ pathomorphology in patients with JIA-radiographic parameters for early diagnosis-

BackgroundJuvenile idiopathic arthritis (JIA) is often accompanied by pathomorphological changes to the temporomandibular joint (TMJ). By analyzing orthodontical orthopantomograms of JIA patients the aims of the study were a) classification of condyle changes, b) quantification of bony asymmetries of condylar destruction and c) detection of relationships between disease duration and TMJ-involvement.Patients/Methods46 caucasian JIA-patients (28 female; 18 male; < 16.0 years) were enrolled, each joint (n = 92) was morphologically assessed by means of orthopantomogram, quantitatively analysed and compared with duration of general disease. Condyle morphology was assessed using the Billiau scale for severity of destruction [1]. The quantitative analysis was based on ratios of condyle, ramus and mandible height.ResultsPatients were divided into groups (Group I – slightly affected, n = 36; Billiau severity 0–2; condyle findings: X-ray normal, condyle erosions, condylar flattening; Group II – severely affected, N = 10; Billiau severity 3–4; condyle findings: condylar flattenings and erosions, unilateral/bilateral complete loss of condyles), based on morphological analysis of condylar destruction. Duration of disease was significantly longer in Group II (8.9 ± 5.2 years) than in Group I (4.6 ± 4.7 years). Asymmetries of condyle, ramus and mandible height, quantitatively analysed by contralateral comparison, were significantly more marked in patients of Group II than of Group I.ConclusionsOrthopantomogram imaging can be used in orthodontics clinical routine to detect TMJ-pathologies and is an important reference for monitoring progression of JIA. Classification into severe and slightly affected TMJ is possible by analysis of condylar pathomorphology. An association between degree of destruction, extent of lower jaw asymmetry and disease duration is suggested by the results.

Estimation of the Stature from Length of the Mandible in the South Indian Population

The present study is based on the measurements of mandible length and height of body total 50 subjects between 18 to 40 years of age. The mandible length was measured by vernier caliper. The height was measured in standing erect, anatomical position with standard height measuring instrument. To avoid variation, all measurements were taken at a fixed time. Obtained data was analysed and attempt was made to find out correlation and to derive a regression formula between mandible length and height of an individual. A good correlation of height was observed with mandible length and it was statistically highly significant. The results of the present study would be useful for Anthropologists and Forensic Medicine Experts.

Age and sex skull variation in a model population of the common shrew (Sorex araneus)

Abstract. Sexual and age variation of the common shrew was assessed in 173 individuals captured in the Novohradske hory mountain range in South Bohemia, Czech Republic. Age variation was found in seven of the fourteen measurements examined. In six of them (height of mandible, height of mandible measured below the first molar, length of mandible, cranial width, condylobasal length, length of neurocranium), values in adults were higher than those in juveniles, while the opposite was found for the length of the lower incisor. Evidence of sex differences was found only in three measurements: height of mandible measured below the first molar, cranial width and length of the lower incisor. Our results suggest the need for separating age and sex groups in studies of skull variation in Sorex shrews.

Assessment of Dimensional Disparity in Posterior Arch Width Between Opposing Maxillae and Mandibles in Completely Edentulous Patients with Increased Resorption and Edentulous age - An in vivo Study

Aim: To assess the dimensional disparity in arch width between opposing maxillae and mandibles with edentulous age and increased resorption in edentulous subjects wearing complete denture. Materials and Method: One hundred edentulous subjects wearing complete denture were selected for the study. Maxillary and mandibular casts and a panoramic radiograph were made for each subject. The original height of the mandible before loss of teeth and resorption was predicted by multiplying the distance between the inferior border of the mandible to the lower edge of the mental foramen by a factor of 2.9. The reduction in height of the edentulous mandible was expressed as percentage of the original height of the mandible. The maxillary arch widths immediately anterior to the tuberosities and mandibular arch widths immediately anterior to the retromolar pads were measured. The difference between these two measurements was calculated to determine the discrepancy in posterior arch width. Results: There was no statistically significant difference in the mean values of posterior arch width discrepancy for different groups of edentulous age as well as percentage resorption. The differences in the mean values for amount of resorption with edentulous age were statistically significant. Conclusion: The discrepancy in posterior arch width between opposing maxillae and mandible does not increase progressively with edentulous age and increased reduction in mandibular height. The arch width of the mandible exceeds the arch width of the maxillae in the molar region by an average of 6 to 8 mm after sufficient resorption establishes a definitive alveolar crest. This remains constant regardless of the amount of resorption or edentulous age. The mandibular ridge reduction is found to increase with edentulous age.