Using a combined mucosa implant-supported mandibular complete overdenture the amount of antagonistic maxillary alveolar bone resorption increases when compared with the mainly mucosa-supported complete overdenture.

Purpose: This study aimed to evaluate the effect of rapid prototyped upper complete denture on retention and patient satisfaction. Material and methods: Eight completely edentulous patients were selected for this study with ages ranged from 40-50 years.All patients had received two complete dentures one fabricated by conventional heat compressed method and the other fabricated by rapid prototyping technology. Patients were classified into two groups, four patients each. Group I received the conventional denture first then the rapid prototyped denture while, Group II received the rapid prototyped denture first then the conventional denture. All patients were instructed to wear their dentures for equal periods of 1 month where retention and patient satisfaction were measured at insertion and after 1 month. After an interval of two weeks, as a wash out period, patients received their other denture. Results: The results of this study showed that there was a high statistical significant difference between the conventional and the rapid prototyped denture regarding retention and patient satisfaction while there was no significant difference between both groups, group I which received the conventional denture first and group II which received the rapid prototyped denture first. Conclusion: within the limitation of this study, it was concluded that retention and patient satisfaction of maxillary rapid prototyped denture were significantly higher than that of the conventional denture. The rapid prototyped dentures can be used as an alternative effective satisfactory treatment for completely edentulous patients rather than conventional dentures but furthermore studies are needed.

Aim: The aim of the study was to study the maxillary tissue changes under complete dentures opposing mandibular implant-supported overdenture retained by either two or single midline implant. Material and Methods: Fourteen completely edentulous patients were chosen for this study. Patients were randomly divided into two groups: Group I; Seven patients received mandibular overdenture retained with 2 implants in the canine region bilaterally with ball and socket attachment. Group II; Seven patients received mandibular overdenture retained with single implant in the midline with ball and socket attachment. Clinical and radiographic evaluations were done by measuring the thickness of the soft tissue overlying the anterior maxillary ridge and amount of bone resorption respectively, measured at 2 points 1 cm and 2 cm bilaterally to the midline at time of implant loading, 3, 6, 9 and at 12 months. Results: there was non-significant increase in maxillary mucosa thickness in both groups at both points of measurements. Also, there were posterior radiographic bony changes in maxillary ridge within both groups. There was significant increase in maxillary bony changes in Group II in comparison to Group I. Conclusion: Within the limitations of this study, it was concluded that there was slight increase in the soft tissue thickness overlying the anterior maxillary ridge in each group. But there was slight increase in Group II more than Group I. More bone resorption in posterior region of maxilla was observed in Group II patients. Amany Abdel-Fattah (1) , Mostafa Abdel-Ghany (2) , Nesrin El-Mahrouky (3) , Yasmeen Al-Mahdy (4) and Shadia El-Sayed (5)

Purpose: to assess the prevalence of temporomandibular disorders among dental undergraduate Egyptian students and the association between the clinical features and radiographic findings. Material and Methods: 281 female dental undergraduate students were randomly selected to participate in the primary screening. In the study screening examination and final diagnosis were done according to a new modified Diagnostic Criteria for TMD (DC/TMD) Axis I which encompass (medical history, primary pain screening questionnaire, signs and symptoms questionnaire and examination protocol). The examination consisted of 11 criteria (pain location, headache location, incisal relationship ,opening pattern ,opening movement ,lateral and protrusive movements ,noises during opening movement ,noises during lateral and protrusive movements, TMJ locking, muscle palpation and TMJ, supplemental muscle pain and palpation, occlusion assessment was added to the criteria Results: the prevalence of TMD was 28.5% among female dental students, the most common reported symptom in a percentage of 89% was pain ,noises were reported in 59.3%f the subjects .The most common subtype of the TMD was muscular pain (mylagia and myofascial pain ) with percentge of 29.2%, 15.4% then arthylagia with 27.7% disc displacement was reported in 13,8 and degenerative reported in 1.5% Conclusions: TMDS is highly prevalent conditions in young population. There is an adequate association between the stress in the university years and the TMDS.

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