Advanced Case of Squamous Cell Carcinoma of the Posterior-Lateral Border of the Tongue Invading the Floor of the Mouth.

Background: Squamous cell carcinoma (SCC) is a common cancer of the oral cavity. It mainly affects patients aged over 50 with male-to-female ratio 2:1. Most of the cases of oral SCC are linked to tobacco and alcohol use. Objective: In this report, we present a case of a 67-year-old male with a mass on the posterior-lateral border of the tongue. Case report: In this report, we present a case of a 67-yearold male with a mass on the posterior-lateral border of the tongue. Being heavy smoker and alcoholic since a young age, he was at high-risk of developing oral cancer. After thorough clinical, histopathological, and imaging assessments a poorly differentiated stage III (T3, N1, M0) SCC was confirmed. He underwent left hemiglossectomy with marginal mandibulectomy and radical neck dissection followed by radiation therapy. Conclusion: SCCs of the tongue can be often asymptomatic and identified at advanced phase leading to a poor prognosis. Therefore, their early diagnosis/management, and regular postoperative follow-ups are mandatory for better treatment outcome and recurrence prevention.

Class II Correction with Microimplant Supported Molar Distalization: A Report of Two Cases.

Introduction: Orthodontic treatment of class II malocclusion with conventional treatment modalities can be challenging for the clinician. The use of microimplants to obtain absolute anchorage has become very popular in recent years especially in noncompliant patients. Microimplants are convenient, save time, and produce good treatment results with no need for patient cooperation. A special approach for class II correction with microimplant supported molar distalization has been developed by the authors and is illustrated through two clinical cases. Description. For each clinical case, 0.022" preadjusted brackets were bonded on both arches except on the maxillary first and second premolars with bands on the first and second molars. After leveling and alignment, a 0.017" × 0.025" stainless steel wire was fitted on the upper arch, and two microimplants were placed bilaterally between the maxillary second premolar and the first molar. Open coil springs were inserted in the upper archwire on both sides and compressed via a steel ligature on sliding hooks to the microimplants pushing distally simultaneously the first and second maxillary molars. En-masse retraction of the maxillary anterior teeth was then carried out on a 0.019" × 0.025" stainless steel closing loop archwire while the posterior segment was anchored to the microimplant with a steel ligature to the first premolar. Results: Class I canine and molar relationship were achieved, and an ideal occlusion was established. Both ANB and FMA angles decreased by 1° due to the counterclockwise rotation effect of the maxillomandibular complex. Skeletal and dental results remained stable three years later. Conclusion: Maxillary molar distalization using coils and buccal microimplants can be regarded as an effective technique in a relatively short time and might be considered a breakthrough in the treatment of class II malocclusions. Microimplants enable the clinician to perform a nonextraction treatment in noncompliant patients who would alternatively be treated only with extractions.

The Effect of Expiration Date on Mechanical Properties of Resin Composites.

OBJECTIVE: The aim of this in vitro study is to evaluate the effect of expiration date on some mechanical properties of resin composites after controlled storage of syringes and compules in a refrigerator at 4°C. MATERIALS AND METHODS: Specimens were tested at 7 days after storage in distilled water at room temperature. The investigated properties are the static modulus of elasticity, the flexural strength, and the Vickers microhardness. Same batches of restorative materials were examined at baseline (at least 1 year before their expiration date) and 1 year after they expired. RESULTS: Paired t-test is used to compare the results between the two groups using StatView software (version 5.0) SAS Campus Drive Cary, North Carolina, USA. Except for the flexural strength, no statistical differences were found between the mechanical properties of the expired and the unexpired group. CONCLUSION: The 1-year expiry date did not seem to affect the investigated mechanical properties.

Anchorage in Orthodontics: Three-dimensional Scanner Input.

AIMS AND OBJECTIVES: The aim of this article is to re-evaluate anchorage coefficient values in orthodontics and their influence in the treatment decision through the usage of three-dimensional (3D) scanner. MATERIALS AND METHODS: A sample of 80 patients was analyzed with the 3D scanner using the C2000 and Cepha 3DT softwares (CIRAD Montpellier, France). Tooth anatomy parameters (linear measurements, root, and crown volumes) were then calculated to determine new anchorage coefficients based on root volume. Data were collected and statistically evaluated with the StatView software (version 5.0). RESULTS: The anchorage coefficient values found in this study are compared to those established in previous studies. These new values affect and modify our approach in orthodontic treatment from the standpoint of anchorage. CONCLUSION: The use of new anchorage coefficient values has significant clinical implications in conventional and in microimplants-assisted orthodontic mechanics through the selection and delivery of the optimal force system (magnitude and moment) for an adequate biological response.

Orthodontics and Dental Anatomy: Three-dimensional Scanner Contribution.

AIMS AND OBJECTIVES: The objective of this article is to focus on the dental anatomy, its influence on therapeutic choices, and decision in orthodontics. MATERIALS AND METHODS: A sample of 80 subjects was selected and analyzed. Through the usage of the three-dimensional scanner with the C2000-Cepha and Cepha3DT software, it is now possible to calculate the volume and the dimensions of both crown and root of each tooth and compare them to the literature. Data were collected and statistically evaluated with the StatView software (version 5.0). RESULTS: These references values were compared with those known in the literature redefining our approaches to treatment in orthodontics. CONCLUSION: The individual anatomical data either unique or in a group of teeth give new insights on the orthodontic therapeutic options.