Dentistry Commons^™

Maxillary Anterior Teeth Replacement With Immediate Dental Implants Utilizing Vestibular Socket Therapy Versus Ice Cream Cone Technique, Mohamed Faisal Abd El Raorf Shoeib, Mohammed Abdel-Monem Tawfik, Mohammed Talaat Salem, Ayman Ahmed Mustafa Yaseen

Mansoura Journal of Dentistry

Objective: This study intended to evaluate changes, clinically and radiographically, associated with the immediate placement of dental implants in the maxillary anterior esthetic zone, comparing vestibular socket therapy with the ice cream cone technique. Materials and Methods: The current research included sixteen individuals requiring the replacement of a non-restorable tooth in the maxillary anterior aesthetic zone with an implant. Patients were divided into two groups of equal numbers. In the first group, eight implants were immediately placed utilizing the ice cream cone technique, whereas in the second group, eight implants were immediately inserted using vestibular socket therapy into the maxillary …

Ultrasound-Guided Vs Conventional Intraarticular Injection Of Hyaluronic Acid For Management Of Temporomandibular Joint Internal Derangement: A Randomized Controlled Trial, Muhanad Almufarrih, Muhammad Al-Hawari, Ayman Yaseen, Sally Abdelsameaa

Mansoura Journal of Dentistry

Objective: This study aimed to evaluate the clinical efficacy of using ultrasound guidance during intra-articular injection of hyaluronic acid (HA) in the management of patients with TMJ internal derangement. Material/subjects and Methods: Forty patients complaining of anterior disc displacement with reduction (DDwR) not responsive to conservative treatment were enrolled in this study. The diagnosis was based on the current update of diagnostic criteria for temporomandibular disorders (TMDs). Intra-articular injection of Hyaluronic Acid guided by Ultrasound in the first group and Intra-articular Injection (IAI) of HA conventional way in the second group were performed. Articular pain was evaluated using the visual …

Effect Of Presence Of Cervical Composite Restoration On Intraoral Scanner Precision Of Anterior Laminate Veneer Preparations – An In Vitro Study, Mohamed Tarek Shanshan, Walid Abd El-Ghafar Al-Zordok, Mohamed Hamed Ghazy

Mansoura Journal of Dentistry

Objective

To evaluate the effect of cervical composite restoration on the precision of digital impressions in anterior laminate veneer preparations.

Materials and methods

Forty-eight sound human maxillary central incisors were collected and prepared for anterior laminate veneer restorations following standardized preparation protocol. Specimens were grouped into two equal groups according to the presence of cervical composite restoration: With cervical restoration and without cervical restoration. All preparations were scanned 10 times repeatedly using Primescan intraoral scanner and exported as standard tessellation language (STL) files. Precision was evaluated by calculating root mean square (RMS) values through three-dimensional superimposition analysis using Geomagic Control …

Fracture Resistance Of Monolithic Zirconia Restorations After Endodontic Access Cavity Preparation: Effect Of Repair Method, Isra Osman Mohammed, Esaama. Khedr, Lamia E. Dawood, Walid Abd Elghafar Al-Zordok

Mansoura Journal of Dentistry

objective: The present study was performed to assess the effect of restoration of access cavity with composite resin filling on fracture resistance of multilayered zirconia crowns.

Materials and Methods:

Thirty-three sound human mandibular first molars were prepared and restored with three types of monolithic zirconia crowns: High-Translucent Multilayered Plus (HTML), Yttria Multilayered (YML), and Ultra-Translucent Multilayered (UTML) (N=11 each). Standardized access cavities were prepared through the occlusal surfaces, endodontic treatment was completed, and each access opening was repaired using incremental composite resin. The specimens were subjected to thermocycling (10,000 cycles between 5 °C and 55 °C) and cyclic mechanical loading …

Extended Platelet Rich Fibrin In Lateral Maxillary Sinus Lifting With Simultaneous Implant Placement, Ammar Radwan Samman, Heba Abo-Elfetouh Elsheikh, Walid Abd El-Ghafar Al-Zordk, Noha Ahmed Mansour

Mansoura Journal of Dentistry

Objective: This study aimed to investigate the influence of extended platelet-rich fibrin (e-PRF) when used in lateral maxillary sinus floor augmentation (MSFA), with particular emphasis on implant stability and peri-implant marginal bone loss.

Materials and Methods: Thirteen patients presenting with posterior maxillary tooth loss and a residual bone height of 3–5 mm underwent lateral sinus floor augmentation with concomitant implant placement. A total of 16 implant sites were included and equally allocated into two groups: Group I (n = 8), in which an allograft was applied and covered using a pericardium membrane, and Group II (n = 8), in which …

Effect Of Biodentine And Treated Dentine Matrix On Viability And Proliferation Of Human Dental Pulp Stem Cells, Nada Barakat, Rana El-Qashty, Mohamad E. Helal

Mansoura Journal of Dentistry

Objective: The present study aimed to assess the dose-dependent effect of Biodentine (BD) and human-treated dentin matrix (hTDM) on the proliferation of human dental pulp stem cells (hDPSCs).

Materials and methods: hTDM was prepared and characterized. The concentration of proteins released from BD and hTDM extracts were quantified using the bicinchoninic acid (BCA) assay after 3 and 7 days. hDPSCs were successfully isolated and characterized, then treated with various concentrations of BD extracts (20, 2, and 0.2 mg/mL) and hTDM extracts (100%, 80%, 60%, 40%, 20%, and 10%). Cell viability was determined after 7 days of incubation using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium …

Survival Rate And Prognostic Criteria In Oral Squamous Cell Carcinoma Patients: A Retrospective Analysis, Shihab Ahmed Jassim, Shadi Awny Hasan, Mohamed Mahmoud Anees, Jilan Mohamed Youssef

Mansoura Journal of Dentistry

Objective:

To evaluate overall survival, disease-free survival (DFS), and associated prognostic factors among patients with oral squamous cell carcinoma (OSCC) treated at a tertiary oncology center in Egypt.

Materials/Subjects and Methods: This retrospective cohort study was conducted at the Surgical Oncology Department, Oncology Center, Mansoura University, Egypt. Medical records of patients with histopathologically confirmed primary OSCC diagnosed between January 2011 and December 2021 were reviewed. A total of 140 eligible patients were included. Data collected included demographic characteristics, selected medical history, tumor site, tumor size, TNM stage, histological grade, treatment modality, and follow-up status. Data were entered, managed, and analyzed …

An Attempt For In Situ Bio-Root Regeneration By Using Treated Dentin Matrix And Dental Pulp Stem Cells In Albino Rats, Amani Mohamad, Ahmad A. Emam, Eman Hany, Mohamed Abdulrahman

Mansoura Journal of Dentistry

Objectives: This study was conducted to prepare and characterize root-shaped treated dentin matrix (TDM) scaffolds, and to evaluate their efficacy together with seeded dental pulp stem cells (DPSCs) as potential bio-roots in extraction sockets of rat models.

Materials and Methods: Root-shaped TDM specimens were prepared and characterized. Following extraction of maxillary incisors, the alveolar sockets were implanted with TDM segments measuring 8 mm in length, either alone (TDM group) or seeded with dental pulp stem cells (TDM/DPSCs group). Animals were euthanized at two and six weeks post-implantation, specimens were processed for histological, histochemical and immunohistochemical analyses.

Results: TDM group at …

Cephalometric Norms And Sexual Dimorphism In The Tanzanian Population: A Comparative Study With Caucasian And West African Norms, Ali K. Hamad, Ferdinand M. Machibya, Matilda M. Mlangwa, David N. Ngassapa

Mansoura Journal of Dentistry

Objective: This study aimed to establish cephalometric norms for the Tanzanian population, assess sexual dimorphism in cephalometric measurements, and compare these findings with established Caucasian and West African norms to enhance orthodontic diagnosis and treatment planning. Materials and Methods: A crosssectional study was conducted on 309 subjects (142 males, 167 females) at Muhimbili University Dental Clinic. Cephalometric radiographs were digitally traced using Quick Ceph Studio. Reliability was assessed using the inter-class correlation coefficient. The Kolmogorov-Smirnov test checked normality, while one-sample t-tests and Student’s ttests (p < 0.05) were used for comparisons. Data were analyzed with RStudio. Results: Tanzanians showed significantly smaller craniofacial measurements than Caucasians. Males had larger skeletal dimensions than females. Compared to West Africans, Tanzanians had generally higher values, with a few exceptions. Conclusion: Tanzanians display distinct craniofacial characteristics, differing from both Caucasians and West Africans. These findings support the need for population-specific cephalometric norms to guide accurate orthodontic diagnosis and treatment.

Evaluation Of Soft Tissue Response Of Two Different Provisional Prothesis Used For Immediate Load Full Arch Implant Prosthesis. Randomized Control Clinical Trial, Mubeen Jaafar Imran, Mohammed Hussein Raafat Abd Elfatah, Sally Elsayed Abdelsameaa, Moustafa Abdou Moustafa Elsyad

Mansoura Journal of Dentistry

Purpose: The study seeks to evaluate the gingival index (GI), probing depth (PD), plaque index (PI) for bar reinforced 3D printed provisional full arch and Milled PMMA (polymethyl methacrylate) provisional full arch prostheses. Materials and methods: This study involves immediate implant placement in completely edentulous mandibles using computer-guided surgery. Patients are selected based on CBCT evaluation, ensuring bone density between D1 and D3. A removable complete denture was first fabricated to restore the occlusal plane. A dual scan technique was used with radiopaque markers for digital planning. Virtual prosthesis planning was performed using Exocad software. A stackable surgical guide was …

Extended Platelet Rich Fibrin In Mandibular Alveolar Ridge Splitting With Simultaneous Implant Placement, Faisal Hammad Nuhater Alshammary, Heba Abo-Elfetooh Elsheikh, Walid Abd El-Ghafar Al-Zordk, Noha Ahmed Mansour

Mansoura Journal of Dentistry

Purpose: To evaluate, both clinically and radiographically, the use of extended platelet-rich fibrin versus a pericardium membrane in mandibular ridge splitting accompanied by immediate implant placement.

Materials and Methods: A total of sixteen implants were placed in eight patients with horizontally atrophic posterior mandibular ridges measuring 3–6 mm in width were randomly assigned to two groups with equal numbers. Both groups underwent ridge splitting with simultaneous implant insertion. In Group I, the intercortical defect was grafted with bone allograft and covered using a pericardium membrane, while Group II received extended platelet-rich fibrin (e-PRF) membrane instead. Clinical assessment focused on assessment …

Comparative Study Between High Performance Polymers Versus Metallic Definitive Obturator: A Finite Element Analysis, Mostafa S. Swedan

Mansoura Journal of Dentistry

Aim: This study investigates the mechanical performance of obturators fabricated from PEKKTON, PEEK, and traditional Cobalet-chromium materials using finite element analysis. Methods : One three dimensional finite element model was created for this study. Starting by cast laser scanning to create solid parts of the model "cortical, cancellous, mucosa, obturator, and partial denture" that to simulate restoration of maxillectomy defects. The model was subjected to average masticatory load of 200N distributed on the partial denture vertically and oblique. Results: The results of the three obturator materials showed too similar deformation and stresses distributions with small variation in values. The obturator …

Influence Of Serum Vitamin D Levels On Marginal Bone Loss Around Unsplinted Mandibular Implant Overdentures: A Retrospective Study, Rahma El Hussany Mohammed El Desouky, Fatma Ahmad El-Waseef

Mansoura Journal of Dentistry

Objective: To investigate the impact of serum vitamin D levels on marginal bone loss (MBL) in patients restored with unsplinted-mandibular-implant overdentures using LOCATOR attachments. Materials and Methods: Thirty participants rehabilitated with three-implant-mandibular overdentures were included. Based on serum vitamin D at the time of prosthetic loading, participants were categorized into two equal groups: a test group with deficient vitamin D (< 20 ng/mL) and a control group with sufficient levels (≥30 ng/mL). Patients with borderline levels (21–29 ng/mL) were excluded. Peri-implant vertical (VBL) and horizontal bone loss (HBL) were measured at baseline (T0), 6 months (T6), and 12 months (T12). Results: The vitamin D-deficient group exhibited significantly elevated VBL and HBLover the sufficient group at all-time points (P

The Mitosis-Specific Antibody Anti-Phosphohistone-H3 (Phh3) And Its Relation To The Histopathological And Biological Characteristics Of Ameloblastoma And Ameloblastic Carcinoma, Husam Asadiq S. Alrumayh, Samar Soliman, Khadiga M. Ali, Hoda M Ismail, Azza Abbas El-Sissi

Mansoura Journal of Dentistry

Aim This study aimed to assess the immunohistochemical (IHC) expression of phosphohistone H3 (PHH3) in multicystic ameloblastoma (AB), unicystic AB and ameloblastic carcinoma (AC) and to investigate the mitotic activity difference between these lesions. Material and Methods This study was carried out on 30 cases, classified into three groups Group I 13 cases of multicystic AB. Group II 7 cases of unicystic AB Group III 10 cases of AC. These cases were selected from the Oral Pathology Department, Mansoura University and Cairo University archives from 2023 to 2024. Immunohistochemistry for PHH3 was done and the immunoreactivity was evaluated by the …

Effect Of Zinc Oxide Nanoparticle Coating And Artificial Saliva On The Frictional Resistance Of Self-Ligating Ceramic Brackets: An In Vitro Study, Amal Mohammed Al-Hajj Abdo, Reham Ibrahim El-Gazzar, Hagag Mohammed, Ahmed Maher Fouda

Mansoura Journal of Dentistry

Aim: The objective of this research was to investigate how ZnO nanoparticles and artificial saliva influence the frictional resistance in self-ligating ceramic orthodontic brackets while performing sliding mechanics Materials & Methods : A total of sixty maxillary canine brackets were divided into three groups: uncoated self-ligating ceramic brackets, ZnO-coated brackets, and ZnOcoated brackets tested under artificial saliva. The friction produced by sliding was measured using a universal testing machine with a 0.019 × 0.025-inch stainless-steel archwire. One-way ANOVA was used for the statistical analysis, and p-values of ≤ 0.05 were considered significant. Results: The results showed a significant difference in …

The Use Of Pekk Versus Peek In The Fabrication Of Maxillary Definitive Obturators, Mostafa S. Swedan, Sherin F. Donia, Salah Af. Hegazy

Mansoura Journal of Dentistry

Purpose. This study aimed to evaluate the clinical performance of CAD-CAM-milled PEKK frameworks versus PEEK frameworks in the fabrication of clasp-retained maxillary obturators, assessing retention outcomes and patient satisfaction over a sixmonth follow-up period. Materials and Methods. Ten patients with maxillary defects (Armany class I) were randomly assigned to two equal groups (n=5). Group 1 received obturators with CADCAM- milled PEKK frameworks (Pekkton, Cendres+Métaux), while Group 2 received obturators with CAD-CAM-milled PEEK frameworks (Bio-HPP, bredent), both incorporating hollow bulb extensions fabricated from PMMA. A standardized digital workflow including exocad software design, and subtractive manufacturing was employed for all prostheses. Framework …

Effect Of Provisional Restorative Material And Temporary Cement Type On The Marginal Adaptation Of Cad/Cam Three-Unit Provisional Fdps: An In Vitro Study, Mustafa Mohammad Harfi, Ahmed Shams, Shaimaa Ahmed Abo El-Farag

Mansoura Journal of Dentistry

Objective: To evaluate and compare the marginal adaptation of CAD/CAM-fabricated three-unit provisional fixed dental prostheses (FDPs) made from polymethylmethacrylate (PMMA) and polyetheretherketone (PEEK) after cementation with either eugenol-free temporary cement or resin-based temporary cement.

Materials/Subjects and Methods: Sixty-four extracted human maxillary premolars and molars were prepared to receive three-unit FDPs and mounted in 32 acrylic resin blocks with simulated periodontal ligament. CAD/CAM provisional FDPs were fabricated from PMMA and PEEK. Specimens were divided according to temporary cement type into two main groups (n = 16) and further subdivided according to restorative material into PMMA and PEEK subgroups (n …

Influence Of Implant Number On Maximum Bite Force Of Maxillary Implant-Retained Overdentures Opposed By Mandibular Two-Implant Overdentures: A Prospective Randomized Crossover Clinical Study, Shaimaa Ayman Hassan, Noha Hosny El-Shaheed, Mai Ahmed Haggag, Fatma Ahmad El Waseef

Mansoura Journal of Dentistry

Objective:

To assess the effect of implant number (three, four, and five unsplinted implants) on maximum bite force (MBF) of maxillary implant overdentures opposed by two‑implant mandibular overdentures.

Materials and Methods:

Twelve completely edentulous cases were recruited from the Outpatient Clinic, Prosthodontics Department. Five implants were placed in the maxilla (midline, bilateral canines, and bilateral molars). Using a randomized crossover design, three loading configurations were evaluated sequentially for three months each: three implants (midline and canines), five implants (all implants), and four implants (canines and molars). Maximum bite force was determined utilizing a GM10 occlusal force meter (Nagano Keiki Co., …

Clinical Outcomes Of Topical Phenytoin Loaded On Hydrogel Wound Dressing On Postoperative Sequalae Following Resection Of Oral Squamous Cell Carcinoma, Abdelrahman Mohammed Yehia Abdellatif, Mohamed Zaghloul Amer, Shadi Awny, Mohammed Abdel-Monem Tawfik

Mansoura Journal of Dentistry

Objective: This study aimed to assess the clinical outcomes of topical phenytoin loaded on hydrogel wound dressing on postoperative sequalae following resection of oral squamous cell carcinoma.

Material and Methods: Sixteen patients were selected from the Outpatient Clinic of the oncology center, Mansoura University complain of oral squamous cell carcinoma require major surgery for resection, neck dissection with further reconstruction. Patients were equally categorized into two groups. In study group, eight patients received a phenytoin-based hydrogel wound dressing following resection and reconstruction procedure. While in control group, including eight patients received a conventional wound dressing following resection and reconstruction …

Cbct-Based Three-Dimensional Characterization Of The Greater Palatine Foramen In A Sample Of Egyptian Population, Sara M Elsaid, Fatma Ata, Ghada A. Elhusseiny, Bassant Mowafey

Mansoura Journal of Dentistry

Background: The greater palatine foramen (GPF) is an important anatomical landmark; precise knowledge of its location and variations is crucial in dental and maxillofacial practice.

Objectives: To assess the position, morphometric characteristics, and anatomical relationship of the greater palatine foramen in a sample of Egyptian population using cone-beam computed tomography (CBCT). The null hypothesis was that no significant side- or sex-related differences would be observed.

Materials and Methods: This retrospective cross-sectional study analyzed a convenience sample of 120 CBCT scans. GPF morphology, anteroposterior and mediolateral dimensions, location, and the distance to the intermaxillary suture were investigated. Statistical analysis was performed …

Regenerative Potential Of Bone Marrow Mesenchymal Stem Cell Conditioned Media In Medication-Related Osteonecrosis Of The Jaw In Albino Rats: An Experimental Study, Rawda Muhammed, Ahmad A. Emam, Elham H. Ahmed, Samah K. Ezzat, Y.M. El-Hawary

Mansoura Journal of Dentistry

Objectives: This study aims to evaluate the regenerative capacity of conditioned media derived from bone marrow stem cells (BMMSC-CM) in the treatment of osteonecrosis of the jaw induced in a rat model by injecting zoledronic acid.

Material and Methods: Fifteen adult male albino rats were randomly assigned to three groups: zoledronic acid (ZOL) group, zoledronic acid + gelatin sponge (ZOL+ sponge) group and a BMMSC-CM treatment (CM-treated) group. All animals received intravenous zoledronic acid (1 mg/kg) for three weeks, followed by maxillary first molar extraction and surgical bone defect creation. The defects were filled with a 2.5 mm³ gelatin sponge …

Digital Pick-Up Of Attachments Before Registration Of Jaw Relations Versus Intraoral Pick-Up During Insertion Of Cad/Cam 2-Implant Mandibular Overdentures: Effect On Peri-Implant Bone Height, Nesma M. Mousa, Nermeen E. Elkhamisy, Islam H. Kandil, Mohamed M. Fouad

Mansoura Journal of Dentistry

Objective: To compare the effect of digital attachment pick-up technique before jaw relation recording and intraoral pick-up technique during insertion for two-implant mandibular overdentures on peri-implant marginal bone height.

Materials and Methods: Sixteen completely edentulous participants recruited for the study. Conventional complete dentures were constructed, followed by guided placement of two mandibular canine implants with delayed loading. Participants were randomized into two groups based on attachment pickup technique: digital group (n = 8) received a milled overdenture base with digital pickup before the jaw relation record, and intraoral group (n = 8) received a milled overdenture base with intraoral …

Erratum To "Fracture Resistance Of Monolithic Zirconia Restorations After Endodontic Access Cavity Preparation: Effect Of Repair Method"

Mansoura Journal of Dentistry

No abstract for this article type

Erratum To " [Survival Rate And Prognostic Criteria In Oral Squamous Cell Carcinoma Patients: A Retrospective Analysis"

Mansoura Journal of Dentistry

No abstract for this article type

In Vitro Evaluation Of Retention Of Double-Crown Prostheses Connecting Natural Teeth And Implants. A Comparative Analysis Of Zirconia, Pekk, And Cobalt Chromium Materials For Primary And Secondary Crowns, Sarah Zaman Sahib Awad, Khloud Ezzat Mourad, Ahmed Sameh Abdelaziz Ismail, Aisha Zakaria Hashem Mostafa

Mansoura Journal of Dentistry

Purpose Objective: To assess and compare the retention performance of different material combinations—Zirconia, PEKK, and Cobalt-Chromium—over time using insertionremoval tests simulating one year of use. Materials and Methods: Nine mandibular polyurethane models with two canines and two dummy implants (first molar area) were used. Three groups of double-crown prostheses were fabricated, differing in materials used for both primary and secondary crowns: Zirconia, PEKK, and Cobalt-Chromium. All crowns were CAD/CAM-designed. Retention was tested using a Universal Testing Machine, with each overdenture subjected to 1,440 insertionremoval cycles to simulate one year. Final retention forces were measured and analyzed using SPSS v23, with …

Mandibular Chondrosarcoma: A Rare Case Report, Moataz Elhefny, Islam Hamada, Ahmed Khalil

Mansoura Journal of Dentistry

Purpose: Chondrosarcoma is a malignant tumor of cartilaginous tissue. It is more apparent in the axial skeletal bone but rare in the head and neck region. The biopsy is the definite way to diagnose Chondrosarcoma and surgical dissection is the direct way of management. Case description: A 76 years old male patient diagnosed with Chondrosarcoma in the mandible at the the premolar region after a history of a non-specific sclerosing osteomyeiltis at the same region 7 months ago. It was a low-grade form with good prognosis. Conclusions: Chondrosarcoma is malignant neoplasm of cartilaginous tissue. It is rare in the oral …

Adaptation Of Cantilever Endocrown Fixed Partial Denture: Effect Of Design And Material Type, Fatimah M. Abu Alrub, Nesma M. El-Gohary, Walid Al-Zordk

Mansoura Journal of Dentistry

Objective: The purpose of this in-vitro study was to evaluate the effect of using different material type and different preparation design on marginal and internal adaptation of cantilever endocrown fixed partial denture. Materials and Methods: Fifty-six mandibular first molars were randomly collected and divided into two main groups (n=28) according to preparation design Group B: butt joint and Group C: 1 mm chamfer finish line. Each group will be subdivide into four subgroups (n=7) according to the material type used, sub-group 1: zirconia, sub-group 2: zirconia reinforced lithium silicate (ZLS), sub-group 3: fiber reinforced composite (FRC) and sub-group 4: polyether …

Effect Of Different Implant Designs On Primary Stability In Different Substrates, Mohamed Adel Ebrahim, Ahmad Mostafa Hussein, Mohamed Abdelmonem Tawfik, Elsayed Gad Eid

Mansoura Journal of Dentistry

Objective To clarify whether implant macrodesign has any influence on primary stability. Implant primary stability was evaluated in different substrates (fresh cow ribs and polyurethane artificial bone blocks) using several methods. Materials and Methods A total of 36 titanium dental implants (3.5 mm × 10 mm) and then divided into 3 groups (n=12): implants have trapezoidal thread design, implants have buttress thread design and implants have reverse buttress thread design were inserted in two different substrates (six fresh cow ribs and eighteen polyurethane casts). Immediately after insertion of dental implant, the implant stability was measured using three different methods (insertion …

Fracture Resistance Of Different Lithium Disilicate Restorations After Endodontic Access Cavity Preparation: Effect Of Repair Method, Hebah Agamal Abdulghafor, Essam A. Khedr, Nesma M. Elgohary, Walid A. Al-Zordk

Mansoura Journal of Dentistry

Objective: To evaluate the effect of different repair methods on the fracture resistance of lithium disilicate restorations after endodontic access cavity preparation. Materials and Methods: One hundred sixty sound human mandibular first molars were prepared and restored with four types of lithium disilicate–based crowns: IPS e.max CAD, GC Initial LiSi Block, Straumann n!ce, and CEREC Tessera (n = 40 each). Standardized endodontic access cavities were prepared in all specimens, then repaired using one of four techniques: (1) inlay restoration with Monobond Etch&Prime, (2) inlay restoration with IPS Ceramic Etching Gel + Monobond Plus, (3) direct composite with IPS Ceramic Etching …

Clinical Evaluation Of Retention And Biting Force In Complete Mandibular Overdentures Retained By Two Implants Using A Solitary Ball And Socket Versus Solitary Bar And Clip Attachments: A Crossover Study, Mohamed Ali Manaa, Khaled Mohamed Zahran, Hesham El-Sharkawy, Ashraf Anwar Gebreel

Mansoura Journal of Dentistry

Objectives: a clinical evaluation of retention and biting force in complete mandibular overdentures retained by two implants using a solitary ball and socket versus solitary bar and clip attachments. Materials and methods: Fourteen completely edentulous male patients aged 49 to 65 were selected and received a maxillary complete denture and two mandibular complete dentures. Each patient received bilateral dental implants placed in the canine areas using a stereolithographic guide. They were grouped according to the period of wearing the prosthesis into: the conventional complete denture group (CD Group), using two duplicated mandibular dentures over three months; ball and socket attachment …