The Journal of Contemporary Dental Practice

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2011 | May-June | Volume 12 | Issue 3

EDITORIAL

Sumant Goel

Orthodontics at Cross Roads

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:1] [Pages No:0 - 0]

PDF  |  DOI: 10.5005/jcdp-12-3-i  |  Open Access |  How to cite  | 

EDITORIAL

Vesna Miletic

Practice-based Research in Contemporary Dental Practice

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:1] [Pages No:0 - 0]

PDF  |  DOI: 10.5005/jcdp-12-3-ii  |  Open Access |  How to cite  | 

RESEARCH ARTICLE

Raghunath Puttaiah, Jeff Seibert, Robert Spears

Effects of Iodine in Microbial Control of Dental Treatment Water

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:9] [Pages No:143 - 151]

PDF  |  DOI: 10.5005/jp-journals-10024-1025  |  Open Access |  How to cite  | 

Abstract

Objective

To determine the effects of low levels of iodine constantly present in the dental unit water system on microbial control of dental treatment water and biofilm control.

Materials and methods

This study used a dental unit water system simulator with eight dental unit waterline systems built to scale and function, each controlled via computer. Each of the eight units was operated independently, four units supplied with self-contained water reservoirs and four units supplied with municipal water. Four units were precleaned to remove biofilm buildup. The study had a well-balanced design with equal representation (variables) of presence/absence of biofilms, selfcontained reservoirs for introduction of treatment water, source water directly connected to municipal water source and iodinated cartridges within the self-contained reservoirs and between municipal water and dental unit. Point-of-use iodinated resin cartridges (IRC) were retrofitted proximal to handpiece and air/ water syringe tip lines in four units, and iodinated resin water cartridges (IRSWC) were fitted to the other four units at the source water output. Heterotrophic plate counts were performed at baseline and twice weekly for a period of 6 weeks. One representative waterline sample was taken from each group at baseline and end-of-study to analyze changes in biofilm status using scanning electron microscopy.

Results

Waterlines not previously contaminated with biofilms did not show organization of biofilm matrix in units equipped with IRSWC. Constantly present low levels of iodine, demonstrated some disruption of biofilms in waterlines already contaminated with mature biofilms. All groups showed contamination levels < 500 cfu/ml (colony forming units per milliliter) consistent with the CDC and ADA guidelines.

Conclusion

In this 6 weeks study, IRSWC equipped waterlines showed disruption of established biofilms, controlled formation of new biofilms in clean lines and rendered the dental treatment water < 500 cfu/ml. Point-of-use iodinated resin cartridges were also effective in controlling contamination in the dental treatment water.

Clinical significance

Dental unit water systems that are in use get contaminated with microbes and biofilms in weeks of being put into use. These biofilms contaminate the treatment water thereby putting patients and staff at risk of infection by predominantly gram-negative microbes. Biofilms in the water systems must be cleaned periodically with a strong decontaminant and the dental treatment source water needs to be modified with a low-grade antimicrobial that can preserve the water quality yet safe to humans. In this translational research study, we evaluate the effects of elemental iodine dissolved in water flowing through an iodine containing cartridge in controlling biofilm and dental treatment water contamination using a dental unit water system simulator, prior to clinical utilization.

How to cite this article

Puttaiah R, Seibert J, Spears R. Effects of Iodine in Microbial Control of Dental Treatment Water. J Contemp Dent Pract 2011;12(3):143-151.

RESEARCH ARTICLE

S Nandini, CS Prashanth, Sanju K Somiah, SRK Reddy

An Evaluation of Nasolabial Angle and the Relative Inclinations of the Nose and Upper Lip

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:6] [Pages No:152 - 157]

PDF  |  DOI: 10.5005/jp-journals-10024-1026  |  Open Access |  How to cite  | 

Abstract

Aims and objectives

The study was done to evaluate a reliable method of constructing the nasolabial angle (NLA) and to correlate the soft tissue profile parameters with one another.

Materials and methods

Lateral cephalogram of 50 randomly selected adult patients were taken. The tracings were made and 10 copies of each tracing were randomly distributed to 10 different orthodontists to draw the NLA.

Results

Pearson's correlation coefficient (r) showed both N/ FH and L/FH angles to have significant p values when compared with NLA. The regression analysis showed that the nasolabial angle can be calculated for any given value of N/FH or L/FH by the formula: NLA = 80.33° + 1.02° (N/FH) and NLA = 14.2° + 1.04° (L/FH). The mean value of N/FH was 17.42° ± 8.40° and L/FH was 80.68° + 6.45° for this sample. Inter examiner reliability calculated by repeated measures of ANOVA and Dahlerg's formula showed high degree of reliability and reproducibility of the method.

Clinical significance

NLA can be predicted for any given value of N/FH and L/FH. NLA = 80.33° + 1.02° (N/FH) and NLA = 14.2° + 1.04° (L/FH). If an individual has either N/FH or L/FH in the normal range but not the NLA then one could calculate the correct NLA using this formula. Thereby the NLA can be brought within the normal range by altering the other nasolabial parameters by correct treatment planning. Since the nasolabial angle plays a vital role in profile esthetics of a person, the clinician should place greater emphasis in evaluating this area and plan treatment mechanics to place this angle within the accepted normal variation.

How to cite this article

Nandini S, Prashanth CS, Somiah SK, Reddy SRK. An Evaluation of Nasolabial Angle and the Relative Inclinations of the Nose and Upper Lip. J Contemp Dent Pract 2011;12(3):152-157.

RESEARCH ARTICLE

Carlos Rocha Gomes Torres, Patrícia Marra de Sá, Raffaela Di Iorio Jeronymo, Karen Cristina Kazue Yui, Eduardo Galera da Silva, Maria Filomena Rocha Lima Huhtala, Ana Paula Martins Gomes

Effect of Calcium Hydroxide on pH Changes of the External Medium after Intracoronal Bleaching

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:6] [Pages No:158 - 163]

PDF  |  DOI: 10.5005/jp-journals-10024-1027  |  Open Access |  How to cite  | 

Abstract

Aim

This in vitro study evaluated the effect of calcium hydroxide on pH changes of the external medium after intracoronal bleaching.

Materials and methods

A total of 50 extracted human premolars were prepared and filled with gutta-percha and endodontic sealer. The teeth were randomly divided into five groups according to the bleaching agents employed: (a) Sterile cotton pellet with distilled water (control group); (b) sodium perborate and distilled water; (c) sodium perborate and 10% carbamide peroxide; (d) sodium perborate and 35% hydrogen peroxide; (e) 35% hydrogen peroxide. The teeth were stored in vials containing distilled water and the pH values of the medium surrounding the teeth were analyzed. After 7-day storage, the bleaching agent was removed and replaced by calcium hydroxide, and the distilled water was changed, in which the teeth were kept stored for further 14 days. Measurement of pH of the external medium (distilled water) was performed 7 days after insertion of the bleaching agents, immediately, 7 and 14 days after insertion of the calcium hydroxide. Data were submitted to statistical analysis by the two-way ANOVA and Tukey, s test.

Results

There were pH changes of the external medium at 7- day period after bleaching procedures. These results confirmed the diffusion of bleaching agents to the external medium.

Conclusion

Calcium hydroxide increased the external medium pH and was effective for pH alkalinization after intracoronal bleaching.

Clinical significance

Intracoronal bleaching of endodontically treated teeth may cause cervical root resorption. A possible explanation for this process is the passage of bleaching agents to the periodontal tissues yielding an inflammatory process. In an attempt to keep the neutrality of the periodontal pH, the calcium hydroxide has been recommended. Results of this study showed that this material should be always used after intracoronal bleaching.

How to cite this article

de Sá PM, Jeronymo RDI, Yui KCK, de Silva EG, Huhtala MFRL, Torres CRG, Gomes APM. Effect of Calcium Hydroxide on pH Changes of the External Medium after Intracoronal Bleaching. J Contemp Dent Pract 2011;12(3): 158-163.

RESEARCH ARTICLE

Indra Gupta, Satyendra Gupta, Anjali Kothari

Revisiting Amalgam: A Comparative Study between Bonded Amalgam Restoration and Amalgam Retained with Undercuts

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:7] [Pages No:164 - 170]

PDF  |  DOI: 10.5005/jp-journals-10024-1028  |  Open Access |  How to cite  | 

Abstract

Aim

To compare the retention of amalgam restorations in bonded amalgam restoration and restorations with undercuts.

Background

With improvement in adhesive technology problem associated with conventional preparation for amalgam restorations mainly compromised resistance form of tooth structure have been largely overcome.

Materials and methods

Forty caries free extracted molars were used. A basic box preparation was done proximally with buccoproximal and linguoproximal walls diverging at 45° angle and the axial wall is 1.3 mm in dentin.

Group 1 – Teeth with basic box preparation.

Group 2 – Teeth with box preparation for bonded amalgam.

Group 3 – Teeth with box preparation and proximal retention grooves.

Group 4 – Teeth with box preparation and occlusal dovetail.

Group 1, 3 and 4 were restored with silver amalgam and group 2 restored with resin-bonded amalgam. All samples were subjected to simulated occlusal load against marginal ridge using a blunt stainless steel point in an Instron testing machine. The force in kilogram required to dislodge the restorations as well as the type and location of failure were recorded.

Result

The main force required to dislodge the restoration was least in group 1 and 3 and maximum in group 2.

Conclusion

The in vitro study showed that the amalgam bonding technique, using an adhesive resin liner in proximal box form preparation, was more effective than either box form with proximal grooves or dovetails or proximal box only in providing resistance to displacement.

Clinical significance

Amalgam bonding eliminates the unnecessary removal of sound tooth structure during cavity preparations.

How to cite this article

Gupta I, Gupta S, Kothari A. Revisiting Amalgam: A Comparative Study between Bonded Amalgam Restoration and Amalgam Retained with Undercuts. J Contemp Dent Pract 2011;12(3):164-170.

RESEARCH ARTICLE

Hamid Jafarzadeh, Ataollah Habibi, Nasrollah Saghravanian, Jahanshah Salehinejad

Thirty Years Clinicopathological Study of 60 Calcifying Cystic Odontogenic Tumors in Iranian Population

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:3] [Pages No:171 - 173]

PDF  |  DOI: 10.5005/jp-journals-10024-1029  |  Open Access |  How to cite  | 

Abstract

Aim

To reevaluate all cases previously diagnosed as calcifying odontogenic cyst (COC) from the archives of the Department of Oral Pathology at Mashhad Faculty of Dentistry from 1978 to 2008.

Materials and methods

Clinical histories and microscopic slides of all cases diagnosed as COC were reviewed and analyzed statistically. The information about patients such as age, sex, clinical features, radiographic view and other necessary data was gathered from biopsy files.

Results

The majority of cases occurred in mandible and four cases were peripherally. Thirteen cases were associated with other odontogenic tumors and 11 cases were odontoma type. In two cases, recurrence was reported after surgical treatment which underwent malignant transformation.

Conclusion

Calcifying cystic odontogenic tumor (CCOT) in Iranian population occurs in younger age group with slightly male predilection and more mandibular, unicystic and simple type.

Clinical significance

It is better to address the noncystic CCOT lesions with their specific terms in order to make histopathological characteristics clear.

How to cite this article

Habibi A, Saghravanian N, Salehinejad J, Jafarzadeh H. Thirty Years Clinicopathological Study of 60 Calcifying Cystic Odontogenic Tumors in Iranian Population. J Contemp Dent Pract 2011;12(3):171-173.

RESEARCH ARTICLE

Subhash Chandra, Saibel Farishta, D Praveen Kumar Varma, K Srinivas Reddy, Zinnie Nanda

Cephalometric Evaluation-based on Steiner's Analysis on Young Adults of Chhattisgarh, India

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:5] [Pages No:174 - 178]

PDF  |  DOI: 10.5005/jp-journals-10024-1030  |  Open Access |  How to cite  | 

Abstract

Aim

The study was conducted to establish skeletal and dental parameters for Chhattisgarhi young adults, evaluation of variability between male and female Chhattisgarhi normal occlusion subjects and comparison of Cephalometric norms of Chhattisgarh population with Caucasians as well as other non- Caucasian groups.

Materials and methods

A Cephalometric study of 80 Chhattisgarhi young adults (40 males and 40 females) with acceptable profile and occlusion was carried out by means of Steiner's analysis.

Results

In comparison to the Caucasian samples, the Chhattisgarhi samples were more protrusive skeletally and dentally and exhibited a more horizontal growth pattern than the Caucasians. The females reported with an increased incisor procumbency, prominent chin and prognathic maxilla than their male counterparts.

Conclusion

The results of the study support the fact that a case of malocclusion cannot be treated to a template of norms which have been derived from mean values of a certain select group of subjects with excellent occlusion and harmonious facial proportions.

Clinical significance

A case of malocclusion needs to be treated based on the individual merits and demerits of that case and not based on template of norms derived from mean values of select subject groups with ideal occlusion and proportion.

How to cite this article

Farishta S, Varma DPK, Reddy KS, Chandra S, Nanda Z. Cephalometric Evaluation-based on Steiner's Analysis on Young Adults of Chhattisgarh, India. J Contemp Dent Pract 2011;12(3):174-178.

RESEARCH ARTICLE

Adriana Cristina Zavanelli, Recardo Alexandre Zavanelli, José Everaldo de Aquino Souza, Nelson Renato França Alves da Silva, Paulo Guilherme Coelho, Renata Cristina Silveira Rodrigues Ferracioli

Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:8] [Pages No:179 - 186]

PDF  |  DOI: 10.5005/jp-journals-10024-1031  |  Open Access |  How to cite  | 

Abstract

Aim

There is little information considering the framework association between cast clasps and attachments. The aim of this study was to evaluate the retention strength of frameworks match circumferential clasps and extra resilient attachment cast in three different alloys (cobalt-chromium, nickel-chromium titanium and commercially pure titanium), using two undercut (0.25 and 0.75 mm) and considering different period of time (0, 1/2, 1, 2, 3, 4 and 5 years).

Methods

Using two metallic matrices, representing a partially edentulous mandibular right hemiarch with the first molar crown, canine root and without premolars, 60 frameworks were fabricated. Three groups (n = 20) of each metal were cast and each group was divided into two subgroups (n = 10), corresponding the molar undercut of 0.25 mm and 0.75 mm. The nylon male was positioned at the matrix and attached to the acrylic resin of the prosthetic base. The samples were subjected to an insertion and removal test under artificial saliva environment.

Results

The data were analyzed and compared with ANOVAs and Tukey's test at 95% of probability. The groups cast in cobaltchromium and nickel-chromium-titanium had the highest mean retention strength (5.58 N and 6.36 N respectively) without significant difference between them, but statistically different from the group cast in commercially pure titanium, which had the lowest mean retention strength in all the periods (3.46 N). The association frameworks using nickel-chromium- titanium and cobalt-chromium could be used with 0.25 mm and 0.75 mm of undercut, but the titanium samples seems to decrease the retention strength, mainly in the 0.75 mm undercut. The circumferential clasps cast in commercially pure titanium used in 0.75 mm undercuts have a potential risk of fractures, especially after the 2nd year of use.

Conclusion

This in vitro study showed that the framework association between cast clasp and an extra resilient attachment are suitable to the three metals evaluated, but strongly suggest extra care with commercially pure titanium in undercut of 0.75 mm.

Clinical significance

Frameworks fabricated in Cp Ti tend to decrease in retentive strength over time and have a potential risk of fracture in less than 0.75 mm of undercut.

How to cite this article

Souza JEdA, da Silva NRFA, Coelho PG, Zavanelli AC, Ferracioli RCSR, Zavanelli RA. Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture. J Contemp Dent Pract 2011;12(3):179-186.

RESEARCH ARTICLE

MB Prashanth, Pradeep N Tavane, Sathish Abraham, Lisa Chacko

Comparative Evaluation of Pain, Tenderness and Swelling followed by Radiographic Evaluation of Periapical Changes at Various Intervals of Time following Single and Multiple Visit Endodontic Therapy: An in vivo Study

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:5] [Pages No:187 - 191]

PDF  |  DOI: 10.5005/jp-journals-10024-1032  |  Open Access |  How to cite  | 

Abstract

Aim

This clinical study was undertaken to evaluate the postoperative sequelae following single-visit versus multiplevisit endodontic therapy at various interval of time in vital as well as nonvital teeth.

Materials and methods

Thirty-two cases were randomly assigned to the following four groups, group I, group II, group III and group IV. After gaining the access to the pulp chamber, establishing the working length, thorough cleaning and shaping was done for all the cases. Obturation was done by protaper (variable taper) gutta-percha and AH-PLUS sealer using lateral and vertical condensation technique. All the cases were recalled after 48 hours, 1 week, 4 weeks and 6 weeks following obturation and were evaluated for postoperative pain, tenderness and swelling.

Results

There was no statistically significant difference amongst all the four groups in the incidence and severity of postoperative pain, tenderness and swelling at the end of one week. However, within 48 hours groups I, II and IV showed more pain when compared to group III. And groups I, II and III showed more tenderness compared with groups IV. Postoperative swelling was not reported.

Radiographic investigation at the end of 6 weeks showed significant change in the appearance of the periapical region in group II and group IV cases.

Conclusion

On strict adherence to biological principles and proper case selection, no significant difference in the success, postoperative pain and tenderness exist when treated with either single-visit or multiple-visit therapy.

Clinical significance

No significant difference in the success rate or postoperative pain, tenderness, and swelling exists when treated with either single-visit or multiple-visit endodontic therapy. Hence, one can readily integrate one-visit endodontic therapy into the routine clinical practice of dentistry.

How to cite this article

Prashanth MB, Tavane PN, Abraham S, Chacko L. Comparative Evaluation of Pain, Tenderness and Swelling followed by Radiographic Evaluation of Periapical Changes at Various Intervals of Time following Single and Multiple Visit Endodontic Therapy: An in vivo Study. J Contemp Dent Pract 2011;12(3):187-191.

RESEARCH ARTICLE

Sachin Chaware, SL Ghodpage, Manish Sinha, Vishal Chauhan, Vrushali Thakare

Prosthetic Status and Prosthetic Needs among Institutionalized Geriatric Individuals in Nashik City Maharashtra: A Descriptive Study

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:4] [Pages No:192 - 195]

PDF  |  DOI: 10.5005/jp-journals-10024-1033  |  Open Access |  How to cite  | 

Abstract

Objectives

A descriptive cross-sectional study was conducted among institutionalized geriatric individuals in Nashik city, Maharashtra, to assess their prosthetic status and needs.

Materials and methods

The oral examination of the study subjects was carried out using Basic Oral Health Surveys, WHO 1997 criteria.

Results

A total of 160 individuals were included in the study of which 40 were females and 120 were males. A total of 55 (34.37%) study participants had some prosthesis at the time of examination, whereas 136 (85%) were in need of prosthesis. A total of 49 subjects (30.62%) needed complete dentures in both jaws. Around 26 (16.25%) of the subjects needed combination prosthesis.

Conclusions

The study concludes that the prosthetic status of the institutionalized geriatric individuals in Nashik city is poor with a higher unfulfilled prosthetic needs. A systematic strategy planning is needed to address these needs.

Clinical significance

There exists a higher unfulfilled prosthodontic need among institutionalized geriatric individuals in Nashik city.

How to cite this article

Chaware S, Ghodpage SL, Sinha M, Chauhan V, Thakare V. Prosthetic Status and Prosthetic Needs among Institutionalized Geriatric Individuals in Nashik City, Maharashtra: A Descriptive Study. J Contemp Dent Pract 2011;12(3):192-195.

RESEARCH ARTICLE

Iraj Mirzaii-Dizgah, Farzaneh Agha-Hosseini

Unstimulated Whole Saliva Parathyroid Hormone in Postmenopausal Women with Xerostomia

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:4] [Pages No:196 - 199]

PDF  |  DOI: 10.5005/jp-journals-10024-1034  |  Open Access |  How to cite  | 

Abstract

Objective

The aim of this study was to evaluate the correlation of xerostomia severity with unstimulated saliva parathyroid hormone (PTH) and to compare unstimulated whole saliva PTH between postmenopausal women with/without xerostomia.

Methods

A case-control study was carried out in 60 (30 as case and 30 as control) selected postmenopausal women with/ without xerostomia conducted at the Clinic of Oral Medicine, Tehran University of Medical Sciences. Xerostomia inventory (XI) score was also used as an index of xerostomia severity. PTH concentration was analyzed by enzyme-linked immunosorbent assay (ELISA). Statistical analysis of Student's t-test and Spearman correlation was used.

Results

The mean unstimulated saliva PTH concentration was significantly higher but flow rate was lower in the case group compared with control. XI score correlated significantly with saliva PTH (r = 0.688, p = 0.001) and flow rate (r = – 0.529, p = 0.001).

Conclusion

Xerostomia severity correlated positively with unstimulated whole saliva PTH and negatively with saliva flow rate in this group of postmenopausal women. Thus, salivary flow rate and PTH levels appear associated with xerostomia and menopause.

Clinical significance

Salivary PTH level appears to be associated with xerostomia and menopause.

How to cite this article

Agha-Hosseini F, Mirzaii-Dizgah I. Unstimulated Whole Saliva Parathyroid Hormone in Postmenopausal Women with Xerostomia. J Contemp Dent Pract 2011;12(3):196-199.

RESEARCH ARTICLE

Raed O Abu Hantash, Mahmoud K AL-Omiri, Mohammad Abu Yunis, Edward Lynch

Relationship between Impacts of Complete Denture Treatment on Daily Living, Satisfaction and Personality Profiles

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:8] [Pages No:200 - 207]

PDF  |  DOI: 10.5005/jp-journals-10024-1035  |  Open Access |  How to cite  | 

Abstract

Objectives

To investigate the association between satisfaction with conventional complete denture prostheses (CDs), impacts of CDs on daily living and personality profiles.

Materials and methods

Fifty-six patients (28 males and 28 females; mean age 53.79 ± 7.762 years) with fitted upper and lower removable CDs were recruited for this study. Clinical success of CDs was assessed according to specific clinical criteria. The dental impact on daily living questionnaire (DIDL) was used to measure satisfaction with CDs and their impacts on daily living. NEO five factor inventory (NEO - FFI) was used to measure patients’ personality profiles. Pearson correlation test and regression models were used to analyze the collected data.

Results

Females were more satisfied with appearance and less satisfied with eating and scored higher on neuroticism, and lower on extraversion and openness personality domains (p < 0.05). Older patients were more satisfied with appearance and less satisfied with oral comfort and general performance (p < 0.05). Neuroticism, extraversion, openness and agreeableness personality profiles could predict and had significant relationship with CDs impacts on daily living and satisfaction with CDs.

Conclusion

Psychological profiles (e.g. neuroticism, extraversion, openness and agreeableness) might play a role and explain CDs impacts on daily living and patients’ satisfaction with their oral status and CD treatment, therefore, might be used to predict satisfactory outcomes of CD treatment. In this regard, technical aspects of CDs are less essential when the prosthesis is clinically successful.

Clinical significance

Psychological factors may play a role and also provide valuable information for the prediction of satisfactory outcomes of complete denture treatment.

How to cite this article

Hantash ROA, AL-Omiri MK, Yunis MA, Dar-Odeh N, Lynch E. Relationship between Impacts of Complete Denture Treatment on Daily Living, Satisfaction and Personality Profiles. J Contemp Dent Pract 2011;12(3):200-207.

RESEARCH ARTICLE

Bader K Al-Zarea, Mohamed G Sughaireen

Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:8] [Pages No:208 - 215]

PDF  |  DOI: 10.5005/jp-journals-10024-1036  |  Open Access |  How to cite  | 

Abstract

Objectives

To investigate the accuracy of four commercial types of additional silicone impression materials (AFFINIS®, Virtual®, Relay 2002 CD® and Silagum®).

Materials and methods

The accuracy of impression material was measured indirectly by measuring three dimensions on stone cast poured from impressions of a stainless steel master model. The three dimensions on stone cast were measured at 1 hour, 2 days, 1 and 2 weeks after making the impression. Two impression techniques were used in the current study. The two-step impression technique was used for AFFINIS® and Virtual®, while single-step technique was used for Relay 2002 CD® and Silagum® materials. Twenty impressions were made of the master cast at four different periods for each of the tested four materials with a total of 320 impressions. Two vertical dimensions and one horizontal dimension were measured on master cast using optical microscope. Statistical analysis was run to compare the mean measurements for tested casts from each impression and time interval with the master cast.

Results

No statistical significant differences were found (p > 0.05) in the accuracy of tested materials. There was no significant difference of master cast and impression cast means over time. Additionally, impression technique could be correlated with accuracy.

Conclusion

The tested additional silicones showed accuracy over time and they could be delayed up to 4 weeks duration without any significant changes in its dimensional stability. Silagum® impression material was the most accurate followed by Relay 2002 CD®, Virtual® and AFFINIS®.

Clinical significance

Silagum® impression material is most accurate followed by Relay 2002 CD®, Virtual® and AFFINIS®.

How to cite this article

Al-Zarea BK, Sughaireen MG. Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials. J Contemp Dent Pract 2011; 12(3):208-215.

CASE REPORT

PS Vijayalakshmi, AS Veereshi

Management of Severe Class II Malocclusion with Fixed Functional Appliance: Forsus

[Year:2011] [Month:May-June] [Volume:12] [Number:3] [Pages:5] [Pages No:216 - 220]

PDF  |  DOI: 10.5005/jp-journals-10024-1037  |  Open Access |  How to cite  | 

Abstract

Background

Management of class II malocclusion in adolescent patients by growth modulation is one of the most debated topics in orthodontics. Noncompliance has been a major concern for orthodontists.

Case report

This case report describes the management of severe class II malocclusion in adolescent patient using functional appliance system—Forsus to correct class II problems, which is clipped on to bands. This appliance has several advantages, as the patient cannot remove it. It acts on the teeth and jaws for 24 hours each day, patient cooperation is not a problem, and as a result the treatment time is short. There is lot of controversy about the use of functional appliances.

Conclusion

This case report illustrates that even today, functional appliances have a significant role in the management of class II malocclusion by using growth modulation. The growth modulation minimizes the necessity of extraction of permanent teeth and probably orthognathic surgery.

Clinical significance

Functional appliances have a significant role in the management of class II malocclusion. The growth modulation minimizes the necessity of extraction of permanent teeth and probably orthognathic surgery.

How to cite this article

Vijayalakshmi PS, Veereshi AS. Management of Severe Class II Malocclusion with Fixed Functional Appliance: Forsus. J Contemp Dent Pract 2011; 12(3):216-220.

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