Journal of Dental Medicine

Evaluation of Various Treatment Outcomes in Tempromandibular Disorder

MJ. Dalaei

Numerous techniques are used for treatment of tempromandibular disorder (TMD). Two aims should be considered when managing patients with TMD.a) pain reduction, feeling of improvement, prevention of untoward sequel of TMD.b) Complete cure and enabling the patients to continue a normal life as much as possible. For an exact and successful treatment the following certain rules should be followed:1} The physician's competence and knowledge in anatomy, physiology, psychology of the disorder.2) Pay attention to patient's statement and being sympathetic, developing rapport, performing a complete and careful clinical examination.3) Considering the patient's psychological or physiological deficits.4) Eliminating TMD Precipitating factor.In general, treatment of this disease like other disease of bones and muscles should not be addressed aggressively such as surgery or occlusion therapy. Simple and conservative methods should be applied for treating this disorder, as some cases are self-limiting and require no intervention.

Root Conditioning and Agents Effect in Regeneration of Periodontal Tissue

Z Kadkhoda

Periodontitis affected root surfaces are hypermineralized and contaminated with cytotoxic and other biologically active substances.The instrumented surface will inervitably be coverd by a smear layer following root planing with or without flap.Smear layer is resistant to saline rinsing, but may be removed with agents such as acids (e.g.citric acid), tetracyclines, EDTA, and laser.Low pH aqueous solutions such as citric acid have been used in surgical periodontal therapy mainly for two reasons, It dissolves smear layer after a relatively short exposure time and it has been claimed to selectively remove root surface associated mineral exposing collagen to varying degrees. A root surface coated with collagen appears to be a preferred surface for fibroblast attachment, a cellular event fundamental to successful periodontal wound healing.Several studies indicate the potential of tetracycline (TTE-HCL) in periodontal regeneration. Its acidic pH suggest that it can be used as a demineralization agent and removing the smear layer and exposing collagen matrix of the dentin.Chalating agent (EDTA) working at neutral pH appears preferable with respect to preserving the integrity of exposed collagen fibers, early colonization, and wound healing. In addition, etching at neutral pH has been reported preserve adjacent tissue- vitality, while etching at low pH necrotizes the fiap and adjacent periodontium.Clinical and subclinical studies have demonstrated laser waves can remove calculus and bacterial plaque and pocket epithelium and strile the root surface and can expose the dentin collagen and dentinal tublules, and leads to pronounce reducing of probing depth around teeth diseased with periodontitis.

Neurofibromatosis Associated With Hyper Parathyroidism

A case involving the rare occurance of hyperparathyroidism in association with neurofibromatosis is reported.Radiographic findings revealed multiple radiolucency which diagnosed as giant cell lesions. Also, high levels of PTH and alkalan phosphatase were found from repeated measurements of the serum.Neurofibromatosis associated with hyperparathyroidism diagnosed in this case report.

A Comparison of X-ray Absorption in Thyroid and Lens by Conventional Radiography and RVG

This article presents a comparative clinical study of digital imaging, as a new technology, and conventional method for X - Ray absorption in lens and thyroid.Clinical examination was performed on 50 patients with an average of 28 years among the cases who were reffered to the department of rediology, Islamic Azad universiy of IRAN in 1999.Two pocket dosimeters were used to meausre the dose rate. One was placed on the skin of thyroid region and the other on the eyes.The results revealed that the absorbed dose in RVG was significantly lower than conventional method (P<0.0001).Digital imaging, as a new technology, is in a state of rapid development.It is a likely that RVG will substute conventional radiography within the near future.

Comparison of Shear Bond Strengths of three resin systems for a Base Metal Alloy bonded to

Resin-bonded fixed partial dentures (F.P.D) can be used for conservative treatment of partially edentulous patients. There are numerous studies regarding the strength of resin composite bond to base meta! alloys. Shear bond strength of three resin systems were invistigated. In this study these systems consisted of: Panavia Ex, Mirage FLC and Marathon V. Thirty base metal specimens were prepared from rexillium III alloy and divided into three groups. Then each group was bonded to enamel of human extracted molar teeth with these systems. All of specimens were stored in water at 37ac for 48 hours. A shear force was applied to each specimen by the instron universal testing machine. A statistical evaluation of the data using one-way analysis of variance showed that there was highly significant difference (P<0.01)between the bond strengths of these three groups.The base metal specimens bonded with panavia Ex luting agent, exhibited the highest mean bond strength. Shear bond strength of the specimens bonded to enamel with Mirage F1C showed lower bond strenght than panavia EX. However, the lowest bond strength was obtained by the specimens bonded with Marathon V.

An evaluation of Microleakage of Posterior Composites

Polymerization contraction may produce defects in the composite - tooth bond. This may lead to bond failure and microleakage. The aim of this study was to reduce microleakage of posterior composites using different methods. 45 molar and premolars extracted teeth were choosen. The cavities were randomly assigned into 5 groups of 9. Box-shaped cavities were prepared on each side of proximal surfaces and restored by five different methods. Group 1 was filled by a light-cured composite and dentin bonding agents (DBAs) with light curing from the occlusal area. Group 2 was filled by a light-cured {LC} composite and DBA, in addition the angle between the light source and occlusal area was 45 degree. After conditioning of teeth in-group 3, LC glass ionomer was placed on the gingival floor and then filled by a light-cured composite and DBA. In group 4, after conditioning, the teeth were lined by a LC glass ionomer and then self-cured composite was placed on gingival floor. This group was filled with LC composite. In Group 5 DBA was used followed by placing a self-curing composite on gingival floor and filled by LC composite. The teeth were subjected to 500 thermocycling (5°C and 55°C with dowel time 30 s) and stored in 0.5% basic fushin for 24 hours. Dye penetration was evaluated by light microscope. The results were tested by Kruskat-Wallis one-way analysis of variance by rank. The comparison between treatment groups showed highly significant difference {P<0.0001). No significant difference was found between groups 3 versus 4 and groups 1,2,5 versus 3,4. Group 3 showed the least microleakage score. Therefore least microleakage was obtained by the group which used L C glass ionomer and DBA followed by filling a composite.

Clinical evaluation of enamel matrix derivative in the treatment of human gingival recessiom

R Sadeghi

Comparative Evaluation Study of II2 O2 Mouthrinse in Gingivitis

Bacteria! plaque is an essential factor of gingival and periodontal disease.The ability of chemical piaque control agent to prevent plaque formation is well documented compare with other mechanical plaque removal methods. The purpose of this study was to compare clinical effects of Shore choice mouth rinse (H2 O2, 0.1%) with a placebo.Following a period of 4 weeks, 20 subjects were allocated to two treatment groups.During this period of time, they rinsed twice a day with either a placebo mouth rinse or the Shor choice.Plaque Index (PI) and bleeding on probing index (BOP) were recorded three days after scaling and root planning. These indecies were rechecked 2 and 4 weeks after rinsing the subject's mouth by mouth rinse and placebo. Results indicated that although there were no significant differences between test and control groups, a reduction of PI and BOP were found in different stages of this study.The clinical data obtained in this study are thus consistent with the previous data, however, care should be taken to extrapolate these results.

The prevalence of Anterior and Lateral Displacement in Mashad Secondary School age 12

Lateral and anterior displacements of mandible may cause malocclusion. The aim of this study was to determine the prevalence of these displacements in a population of 597 childrens age 12 in Mashhad secondary schools. Displacment of mandible was shown to be in 11.8 percent of the population (6.2 percent anterior and 5.6 percent lateral displacement).Anterior displacement of mandible was diagnosed in all mandibie lateral displacements. Premature contacts were observed in upper lateral incisors, second premolars and first molar in anterior and lateral displacements, respectively.

Change in Vertical Relationship of Upper Incisors and Lip Following Anterior Retration in Adult with the Combination Edgewise Technique

: One of the main aspects of orthodontic treatments is hard and soft tissue changes and their effects on patients appearance.Fixed orthodontic treatment with extraction of upper first premolars to camulfalge of ci II malocclusion is very common,however there is not sufficient studies about lip and incisors changes after this procedure. For evaluating of vertical changes of upper, lip and incisors following retraction of upper incisors, fifteen adult Iranian patients aged 15 to 24 years who sought treatment for their CI II DI malocclusion were treated. Standard edgewise technique(0.018") following extraction of four first premolars were used.A cephaiometric study was undertaken to determine the vertical change in upper incisors and upper lip. For this evaluation, thirty linear and angular measurements were utilized.Results show that: 1- The upper incisors were intruded (X=0.83mm).2- The upper lip length was increased(X~1.2mm).3- The occlusal plane, rotated upward (Anteinclination).4- The palatal plane rotated downward and backward (Retroinclination).This study shows that the standard edgwise appliance has the capacity of reduction of incisor protrusion significantly without extruding them.

The Prevalence of Pemphigus (Razi Hospital and Department of Oral Pathology, Tehran University of Medical Sciences)

The aim of this retrospective statistical study was to determine the prevalcence and frequency of age and sex distributions of pemphigus disease. Pemphigus disease classified as autoimmune bullous dermatoses which is a chronic mucocutaneous disease.This study was performed in Razi Hospital and department of oral pathology of dental school, Tehran University of Medical Sciences. The most frequently effected area was buccal moucosa of oral cavity. The most rate of recurrence was found in oral cavity which being more common in middle age females (25-44 years).