scholarly journals Difference in clinical crown length of maxillary central incisors and gingival display at rest and during smiling based on gender

2013 ◽  
Vol 25 (1) ◽  
Author(s):  
Nadia Atina Zaini ◽  
Rasmi Rikmasari ◽  
Lisda Damayanti
Keyword(s):  
Mean Value ◽  
Test Results ◽  
Upper Lip ◽  
Maxillary Central Incisor ◽  
Crown Length ◽  
Anterior Teeth ◽  
Incisal Edge ◽  
Occlusal Wear ◽  
The Mean ◽  
Digital Caliper

Introduction: The aim of the present study was to investigate the effect of gender on the degree of maxillary central incisors and associated gingival display when the lips are at rest and during smiling. Methods: A total of 65 subjects (40 females [61.5%]; 25 males [38.5%]) of Malaysian Malay community studied in UNPAD were included in the study. All of the subjects had all natural anterior teeth present with no caries, extreme occlusal wear, restorations, extrusion, obvious deformities, or tooth mobility. The visible portions of the maxillary central incisor, and associated gingival at rest and smiling were measured vertically from the lower border of the upper lip to the incisal edge of the incisors. The measurements were measured using an electronic digital caliper and repeated three times. The mean value was calculated and statistical analyses were performed by Student t test. Results: Outcome of the study indicated that there is marked difference statistically (p < 0.05) with the clinical crown length display at rest (CCLR). However, the clinical crown length display during smiling (CCLS) and gingival display during smiling (GD) differences is non significant (p > 0.05) between these two genders. Conclussion: Females displayed more clinical crown length of maxillary central incisors than males at rest. During smiling, no gender differences in maxillary central incisors display were recorded, however, females displayed more maxillary gingival than males.

scholarly journals Anatomic crown length and mesio-distal width of maxillary central incisor teeth in Bangladeshi population

2013 ◽  
Vol 2 (1) ◽  
pp. 08-13
Author(s):  
Md Mahfuz Hossain ◽  
Mushfiq Hassan Shaikh ◽  
Md Mahfuzur Raihan ◽  
Md Asif Iqbal Khan
Keyword(s):  
Central Incisor ◽  
Crown Height ◽  
Maxillary Central Incisor ◽  
Anatomy And Physiology ◽  
Crown Length ◽  
Anterior Teeth ◽  
Dental Aesthetics ◽  
The Mean ◽  
Bangladeshi Population ◽  
Oral Anatomy

Background : Dimensions of teeth have been an excellent tool for determining clinically relevant aspects of dental aesthetics. Especially, the anterior teeth crown height and their mesio-distal widths are very important, because of their strategic anatomical position of being in the centre and in the front of the upper jaw. Objectives : The presented study was aimed to find the nominative data of the average anatomic crown height and mesio-distal width of maxillary central incisors of Bangladeshi population irrespective of age and sex. Methods : This observational study was carried out at Update dental college & Hospital. 110 typical extracted human maxillary central incisor teeth were collected randomly from the Oral Anatomy and Physiology Department of Update dental college and Sapporo dental college. Results : In this study it shows that maxillary central incisors’ average crown length is between  7.25 – 11.75 mm and the mean crown length is 10.37(SD±0.90) mm. The average mesio-distal width is between 9.00 – 13.00 mm and the mean mesio-distal width  is 8.51 (SD±0.62) mm. Conclusions : Apart from other specific and objective parameters related to dental aesthetics, these values of mesio-distal width and the length of the maxillary central incisors mentioned in this study will serve as guidelines for the diagnosis and treatment planning, especially in restorative dentistry, orthodontics and periodontal surgeries.DOI: http://dx.doi.org/10.3329/updcj.v2i1.13954 Update Dent. Coll. j: 2012; 2 (1): 08-13

scholarly journals Comparative Evaluation of Golden Proportion, Recurring Esthetic Dental Proportion and Golden Percentage in Himachal Demographic

2019 ◽  
pp. 1-7
Author(s):  
Vishwas Mahajan ◽  
Archana Nagpal ◽  
Rajeev Gupta ◽  
Sharad Vaidya ◽  
Farhat Jabeen ◽  
...  
Keyword(s):  
Mean Value ◽  
Himachal Pradesh ◽  
P Value ◽  
Inclusion Criteria ◽  
Golden Proportion ◽  
Anterior Teeth ◽  
The Mean ◽  
Gender Based ◽  
Natural Dentition ◽  
Digital Caliper

Aim: The purpose of this study was to comparatively evaluate the validity of Golden Proportion, Recurring Esthetic Dental (RED) proportion and Golden Percentage in maxillary anterior teeth in population of Himachal Pradesh. Methods and Materials: Dentulous stone casts of maxillary arch were made of the subjects who met the inclusion criteria. Conditions for inclusion criteria included that the individuals: 1) should be of Himachali origin with agreeable smiles 2) have well aligned anterior dentition 3) should be between age group of 20-40 years Total of 200 students representing Himachal Pradesh population were included. Measurements were done for the spaces in the grids using the digital caliper. Results: The Golden Proportion ratio of 1.3 and 1.4 were more commonly observed in 27.5% and 40% respectively than 1.618 which was observed in 5.5% under study of the population. A Paired sample t-test showed there was no significant gender based difference in Lateral/Central incisor Red Proportion. (P-value>0.05) except for the Canine/Lateral Red Proportion. (P-value<0.05). The Golden Percentage for males in central and lateral incisors and canine was 22.48%, 15.96% and 11.08% respectively. The mean value for females in central and lateral incisors and canine was 22.72%, 16.25% and 10.97% respectively. Conclusions: Golden percentage could be used for aesthetic correction and was found to be more applicable in the population included in this study. Golden percentage could be used for aesthetic correction and are more applicable to natural dentition in the population of Himachal Pradesh.

scholarly journals Distances between mandibular posterior teeth and the WALA ridge in Peruvians with normal occlusion

2017 ◽  
Vol 22 (6) ◽  
pp. 56-60 ◽  
Author(s):  
Carla Y. Kong-Zárate ◽  
Marcos J. Carruitero ◽  
Will A. Andrews
Keyword(s):  
Age Groups ◽  
Test Results ◽  
Posterior Teeth ◽  
Normal Occlusion ◽  
Tooth Type ◽  
The Mean ◽  
Student’S T ◽  
Mandibular Posterior Teeth ◽  
Digital Caliper ◽  
Student’S T Test

ABSTRACT Objective: The purposes of this investigation were to determine the horizontal distances between the mandibular posterior teeth and the WALA ridge in a sample of Peruvians with normal occlusion and to compare them by tooth type, sex, arch side, and age groups. Methods: 65 dental casts of subjects with normal occlusion were collected. Posterior teeth, except for third molars, were evaluated. The horizontal distances between the occluso-gingival midpoints of the buccal surfaces (FA points) of each tooth and the WALA ridge were measured using a modified digital caliper. The values between each different tooth type within the sample were compared using the ANOVA and Scheffe tests, while comparisons by sex, arch side and age groups, using the Student’s t-test. Results: The mean distances in the sample was 0.96 mm for first premolars, 1.45 mm for second premolars, 2.12 mm for first molars and 2.55 mm for second molars. Statistically significant differences between each of the four tooth types were found. There were no significant differences found between sex, arch side and age groups. Conclusion: The horizontal distances between the mandibular posterior teeth and the WALA ridge increased progressively from the first premolars to the second molars in Peruvians with normal occlusion. The WALA ridge was a good landmark to evaluate the positions of posterior teeth in Peruvians with normal occlusion.

scholarly journals Determination of Maxillary Incisal Edge Position using Canine Visibility as a Guide – An In vivo Study

2021 ◽  
pp. 165-171
Author(s):  
Ankita Piplani ◽  
G. Ganadhipathi ◽  
M. C. Suresh Sajjan
Keyword(s):  
Age Groups ◽  
Adhesive Tape ◽  
Central Incisor ◽  
Upper Lip ◽  
Maxillary Central Incisor ◽  
Group Iii ◽  
Incisal Edge ◽  
Group I ◽  
Group Ii

Purpose:  To evaluate the reliability of the visibility of the central incisor & the canine for the cervico incisal positioning of anterior maxillary teeth related to age & sex while the upper lip was in repose in dentate patients & the development of rehabilitation recommendations for edentulous individuals with regard to the location of the maxillary incisal edge Methodology: 308 subjects [152 Males & 156 Females] belonging to the age of 30 to 59 years were selected using a simple stratified random technique. There were three age and sex groups: Group I was 30 to 39 years old, Group II was 40 to 49 years old, and Group III was 50 to 59 years old. The vertical distances (in mm) between the lower border of the upper lip and the right maxillary central incisal edge and canine tip were measured and recorded using adhesive tape marked with millimetres. A single examiner recorded all the measurements and the values were tabulated and subjected to statistical analysis. Results: Men in Groups I and II had maxillary central incisor exposure ranging from +6 to -1mm, whereas males in Group III had exposure ranging from +5 to -2mm. There was an exposure range of +6 to -2 mm in females in Group I, +7 to -2 mm in Group II, and +5 to -2 mm in Group III for the central incisors. While the canine exposure in Group I and II and Group III ranged from +2 to -4mm in females, the exposure ranged from +3 to -3mm in men of all ages. In all groups, females had statistically significant (P0.05) more central incisor and canine exposure than men. Conclusions: The canine visibility was less variable in all the age groups and in both males and females in comparison to the central incisor. When restoring edentulous individuals, the average canine exposure dimension can be employed for cervico-incisal location of the anterior maxillary teeth.

scholarly journals Research on Intelligent Compaction Technology of Subgrade Based on Regression Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Ziyi Hou ◽  
Xiao Dang ◽  
Yezhen Yuan ◽  
Bo Tian ◽  
Sili Li
Keyword(s):  
Resilient Modulus ◽  
Single Point ◽  
Mean Value ◽  
Test Results ◽  
Intelligent Compaction ◽  
One Dimensional ◽  
Remote Monitoring System ◽  
The Mean ◽  
The One ◽  
Compaction Degree

A remote monitoring system with the intelligent compaction index CMV as the core is designed and developed to address the shortcomings of traditional subgrade compaction quality evaluation methods. Based on the actual project, the correlation between the CMV and conventional compaction indexes of compaction degree K and dynamic resilient modulus E is investigated by applying the one-dimensional linear regression equation for three types of subgrade fillers, clayey gravel, pulverized gravel, and soil-rock mixed fill, and the scheme of fitting CMV to the mean value of conventional indexes is adopted, which is compared with the scheme of fitting CMV to the single point of conventional indexes in the existing specification. The test results show that the correlation between the CMV and conventional indexes of clayey gravel and pulverized gravel is much stronger than that of soil-rock mixed subgrades, and the correlation coefficient can be significantly improved by fitting CMV to the mean of conventional indexes compared with single-point fitting, which can be considered as a new method for intelligent rolling correlation verification.

scholarly journals Effects of different lingual retainers on periodontal health and stability

2021 ◽  
Author(s):  
Rabia Adanur-Atmaca ◽  
Serpil Çokakoğlu ◽  
Fırat Öztürk
Keyword(s):  
Stainless Steel ◽  
Computer Aided Design ◽  
Steel Wire ◽  
Mean Value ◽  
Periodontal Health ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Computer Aided ◽  
Group 3 ◽  
The Mean

ABSTRACT Objectives To evaluate the effects of different lingual retainers on periodontal health and stability of mandibular anterior teeth at the 1-year follow-up. Materials and Methods One hundred thirty-two patients were randomly allocated to four groups using different lingual retainers: group 1, 0.016 × 0.022-in dead-soft wire; group 2, 0.0215-in 5-strand stainless steel wire; group 3, 0.014 × 0.014-in computer-aided design/computer-aided manufacturing nitinol retainer (Memotain); group 4, connected bonding pads. Plaque, gingival, and calculus indexes were used to evaluate periodontal health, and Little's irregularity index, intercanine width, and arch length measurements were performed to evaluate stability. All measurements were performed at each time point (debonding and 3, 6, 9, and 12 months). Results The mean value of the gingival index obtained in group 3 was lower than the mean value for all other groups. The mean value of the calculus index was the lowest in group 3, and there was a significant difference between group 3 and groups 1 and 2. No differences were found among the groups in terms of plaque index, intercanine width, and arch length. The least irregularity was obtained in groups 2 and 3. There were no significant differences between these groups and groups 1 and 4. Conclusions Gingival inflammation and calculus accumulation were the lowest in group 3 (Memotain). The irregularity for Memotain and stainless steel retainers was less than or the other groups. However, no clinically significant worsening of periodontal health or relapse were seen in any groups after 1 year.

Effect of Incorporating Zirconia Powder into a Primer on the Resin Bond Strength to Zirconia Ceramic

2020 ◽  
Vol 20 (9) ◽  
pp. 5575-5578
Author(s):  
Eunkyung Lee ◽  
Yangho Lee ◽  
Young Kyung Kim ◽  
Chan Ho Park ◽  
Tae-Yub Kwon
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Mean Value ◽  
Zirconia Ceramic ◽  
Test Results ◽  
Zirconia Powder ◽  
Scanning Calorimetry ◽  
The Mean ◽  
Ftir Spectrophotometry

The adhesion property of zirconia powder-incorporated primers was investigated in vitro with the aim of enhancing the resin bond strength to zirconia ceramic. A commercial zirconia primer was modified through the addition of 0 (control), 5, 10, 25, and 50 wt% of a zirconia powder (codes: ZP0, ZP5, ZP10, ZP25, and ZP50, respectively). Prior to primer modification, the powder was characterized via differential scanning calorimetry (DSC) and Fourier-transform infrared (FTIR) spectrophotometry. The surfaces of dental zirconia ceramic discs were air-abraded and treated with one of the five primers. One resin composite cylinder (diameter: 2.38 mm) was bonded on one specimen surface (n = 12/group). The bonded specimens were all stored for 24 h in distilled water at 37 °C and subjected to 5000 thermal cycles prior to shear bond strength (SBS) testing. The DSC and FTIR analyses confirmed that the zirconia powder contained an organic binder. The SBS test results showed that the groups could be arranged as follows, ZP25 > ZP10 > ZP5 > ZP0, i.e., in descending order of the mean value. The lowest SBS value was obtained for the ZP50 group. The results suggest that the incorporation of a zirconia powder into a primer represents a promising modification method for improving the resin bond strength to zirconia ceramic.

Effect of Fluoride Varnish on Enamel Remineralization in Anterior Teeth with Molar Incisor Hypomineralization

2016 ◽  
Vol 40 (3) ◽  
pp. 207-210 ◽  
Author(s):  
Manuel Restrepo ◽  
Fabiano Jeremias ◽  
Lourdes Santos-Pinto ◽  
Rita CL Cordeiro ◽  
Angela CC Zuanon
Keyword(s):  
Repeated Measures ◽  
Pediatric Dentistry ◽  
Fluoride Varnish ◽  
Favorable Effect ◽  
Test Results ◽  
Anterior Teeth ◽  
Molar Incisor Hypomineralization ◽  
Significant Difference ◽  
Permanent Molars ◽  
The Mean

Objective: The objective of this study was to investigate the effect of fluoride varnish on remineralization of anterior teeth affected by Molar-Incisor Hypomineralization (MIH) by means of Quantitative Light-Induced Fluorescence- QLF. Study design: Fifty-one healthy 9 – 12- year-old children were selected according to different clinically diagnosed levels of MIH, proposed by the European Academy of Pediatric Dentistry (2003) (considering the most severe lesion per patient, n= 51 lesions), and randomly divided into two groups: (1) four applications of 5% NaF varnish, with one-week interval, and (2) usual home care- control. At each visit, the mean change in fluorescence and area of lesion were measured by QLF. The data were analyzed by repeated measures ANOVA and Tukey's test. Results: All patients showed enamel alterations in first permanent molars and incisors, frequently with two molars affected by MIH (41.1%). There was no statically significant difference in the mean of fluorescence and area of lesion between groups over the studied time. Conclusion: We observed no favorable effect on the remineralization of MIH lesions in anterior teeth after four applications of fluoride varnish.

Research on the Calculation Method for Bending Rigidity of Recycled Concrete Beams

2014 ◽  
Vol 919-921 ◽  
pp. 1396-1399
Author(s):  
Bin Lei ◽  
Hui Wu ◽  
Yu Song Yan ◽  
Chun Hua Rao
Keyword(s):  
Calculation Method ◽  
Concrete Beams ◽  
Mean Value ◽  
Recycled Concrete ◽  
Experimental Results ◽  
Variation Coefficient ◽  
Bending Test ◽  
Test Results ◽  
Bending Rigidity ◽  
The Mean

The comparison between the experimental results of bending rigidity of recycled concrete collected from the bending test carried out by domestic and overseas researchers and the calculated results by formulas from available codes is done. The results show that formulations of from available codes are not suitable for recycled concrete beams. Then, based on the factors that influence the bending rigidity of recycled concrete beams, the formulation of bending rigidity for recycled concrete beams is proposed by theory. The experimental results by this the formulation and the test results is very close, the mean value and variation coefficient of the ratio of experimental value and calculated value for recycled concrete beams is respectively 1.01 and 0.16.Keywords: recycled concrete beams;bending rigidity; deflection; formulation

scholarly journals The Effectiveness of Patient Safety Cultural Training with Mirror Method and Case Study on Nurse Understanding About Application of Patient Safety at Hospital Pekanbaru

2019 ◽  
Vol 1 (1) ◽  
pp. 11-17
Author(s):  
Awaliyah Ulfah Ayudytha Ezdha ◽  
Silvia Nora Anggreini ◽  
Dwi Elka Fitri
Keyword(s):  
Patient Safety ◽  
Standard Deviation ◽  
Mean Value ◽  
P Value ◽  
Test Results ◽  
Cultural Training ◽  
Lecture Method ◽  
The Mean

Quality development in hospitals has led to efforts to improve quality oriented towards patient safety. The purpose of this study was to compare what methods were most effective between lectures and case studies to improve nurses' understanding of the application of patient safety. The design of the research used is a mix method that is qualitative and quantitative. This research was carried out at Hospital in Pekanbaru with a sample of the study were all nurses who served at the hospital as many as 60 people. The results obtained from the study showed that the mean value of nurses 'understanding of patient safety habit after the lecture method training was 67.47 with a standard deviation of 8.320 while the mean value of nurses' understanding of the HABIT of patient safety after training in the case study method was 73.97 with a standard deviation of 6.835. The independent t test results obtained p value = 0.002. The results of this study are expected in addition to improving the understanding of nurses as well as the hospital can apply the most appropriate method so that the goals of the patient's safety goals are the quality of service can be achieved.

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