Transitional implants in computer-assisted implant surgery and fixed complete-arch provisionalization: A retrospective case series.

Introduction: Using mini implants as transitional implants (TIs) for complete arch implant-supported rehabilitations may overcome limitations associated with mucosa-supported surgical guides and facilitate immediate fixed provisionalization. This study aimed to assess the success of TIs in supporting surgical guides for implant placement and fixed provisional prostheses.

Methods: Patients who received TIs between 2012 and 2023 for a complete arch implant-supported prosthesis were evaluated retrospectively.

Platelet-Rich Plasma Lysate-Incorporating Gelatin Hydrogel as a Scaffold for Bone Reconstruction.

In implant dentistry, large vertical and horizontal alveolar ridge deficiencies in mandibular and maxillary bone are challenges that clinicians continue to face. One of the limitations of porous blocks for reconstruction of bone in large defects in the oral cavity, and in the musculoskeletal system, is that fibrin clot does not adequately fill the interior pores and does not persist long enough to accommodate cell migration into the center of the block. The objective of our work was to develop a gelatin-based gel incorporating platelet-rich plasma (PRP) lysate, to mimic the role that a blood clot would normally play to attract and accommodate the migration of host osteoprogenitor and endothelial cells into the scaffold, thereby facilitating bone reconstruction.

Complete-Arch Implant Rehabilitation with the Aid of Computer-Assisted Implant Surgery and Transitional Implants: A New Digital Approach.

This case report describes a new digital workflow for computer-assisted implant surgery in an edentulous patient using transitional implants to support a fixed surgical template and interim prosthesis. The accuracy of the final implant position using the described protocol was evaluated and compared to the outcomes obtained using other types of surgical templates. This novel digital approach appears to enhance the accuracy of implant positioning for edentulous patients and seems to be comparable to a tooth-supported surgical template.

Application of 3D-Printed Implant-Osseous-Membrane Guide for One-Stage Sinus Floor Elevation: A Clinical Report.

Sinus floor elevation with the lateral window approach has proven to be an effective treatment modality for vertical bone augmentation in the posterior region of the maxilla. The simultaneous implant placement during the procedure can be achieved if enough remaining bone height is available to obtain implant primary stability. However, the proper identification of the maxillary sinus boundaries for the window demarcation along with membrane protection for simultaneous implant placement can be challenging.

A Modified Implant Surgical Guide for the Administration of Maxillary Nerve Block Anesthesia Intraorally via the Greater Palatine Foramen: Case Report.

Block anesthesia for the maxillary division (V2) of the trigeminal nerve is a suitable approach when an entire quadrant of teeth and/or associated structures are involved. The most effective approach to anesthetize the maxillary branch is intraorally via the greater palatine canal. This case report describes the use of a computer-aided design/computer-assisted manufacturing (CAD/CAM) implant surgical template designed with a guide channel to allow for the administration of maxillary nerve block through the greater palatine canal.

Influence of implant macrodesign and insertion connection technology on the accuracy of static computer-assisted implant surgery.

Objective: The aim of this study was to evaluate the effect of three different macrodesigns and two different insertion devices on the accuracy of static computer-assisted implant surgery (sCAIS).

Materials And Methods: Ninety implant replicas with three different macrodesigns: Soft tissue level (TL), bone level (BL), and bone level tapered (BLT) were placed in 30 dental models with two implant insertion devices: Guided adapter and guided screwed-in mount. Preoperative and postoperative positions of implants were compared and the mean angular deviation, crestal, and apical three-dimensional (3D) deviation were calculated for each implant macrodesign and each insertion device.

[Incidental finding of phaeochromocytoma during surgery: the anaesthesiologist's nightmare].

We report the case of a patient who presented hypertension paroxysmal with acute pulmonary oedema followed by cardiocirculatory arrest during gynaecological surgery for resection of latero-aortic lymph nodes suspected to be cervical cancer metastases. This intervention, originally oncologic, has discovered ectopic phaeochromocytoma a posteriori. The management of perioperative serious adverse events revealing the undiagnosed phaeochromocytoma is discussed.

[Design and evaluation of the quality of information written for scanner and magnetic resonance imaging in neuropediatrics].

Introduction: We designed written information concerning two medical imaging techniques: the computed tomography scanner and the magnetic resonance imaging (MRI), and we evaluated the quality of the information in particular its readability.

Methods: Written information concerning scanner and MRI were elaborate starting from a reference frame based on a lexicon of the good practices. The written information sheets were initially reviewed by eight doctors, 45 nurses and by 26 couples of parents of hospitalized children, and finally by the communication and juridical services of our hospital.

What is the optimal remifentanil dosage for providing excellent intubating conditions when coadministered with thiopental? A prospective randomized dose-response study.

Background And Objective: The aim of the present study was to determine the dosage of remifentanil that must be added to thiopental 5 mg kg(-1) to provide excellent intubating conditions in 95% of patients.

Methods: Sixty-eight premedicated female American Society of Anesthesiologists class 1 and 2 patients were randomly allocated to four remifentanil dose groups (3, 4, 5 or 6 microg kg(-1)). Induction of anaesthesia was performed with a blinded dose of remifentanil infused over 60 s, simultaneously coadministered with thiopental 5 mg kg(-1) infused over 20 s; and tracheal intubation was attempted 150 s after the beginning of induction.

Increased in vivo biosynthesis of prostacyclin and thromboxane A2 in chronic idiopathic thrombocytopenic purpura.

The production of thromboxane A2 (TxA2) and prostacyclin (PGI2) was studied in patients with chronic idiopathic thrombocytopenic purpura (10 patients) compared to central thrombocytopenia (five patients) and healthy subjects (10 subjects). This production was monitored by the assay of urinary 2,3-dinor-TxB2 and 2,3-dinor-6-keto-PGF1 alpha as respective breakdown products of TxA2 and PGI2 by stable isotope dilution assays employing negative ion-chemical gas-chromatography-mass-spectrometry. Evidence is presented for the existence of an enhanced PGI2 and TxA2 urinary excretion in the group of idiopathic thrombocytopenic purpura (ITP) patients.

Acute myocardial infarction: measurement of arachidonate end-products in whole blood as an index of platelet cyclo-oxygenase activity in vivo.

The endogenous arachidonic acid metabolism was investigated ex vivo, in separated serum from clotted whole blood, soon after the onset of acute myocardial infarction (3.3 +/- 0.7 hr).

Uncorrected pre-ejection period: a simple non-invasive measurement for pharmacodynamic screening of inotropic activity.

Since heart rate (HR) is an important determinant of the duration of systole, systolic time intervals (STI) from 8 healthy subjects were examined after infusion of atropine. As no overall correlation was found between HR and pre-ejection period (PEP), the results confirm the need for individual estimates of the correction of the left ventricular ejection time (LVET) and the total electromechanical systole (OS2). In the same subjects the sensitivity of PEP to minor negative inotropic effects of mexiletine and disopyramide measured at Cmax was confirmed.

Systolic time intervals in evaluation of the negative inotropic effect after single oral doses of mexiletine and disopyramide.

A placebo-controlled, single blind, crossover study was done to evaluate the inotropic effects of single oral doses of mexiletine and disopyramide assessed by the measurement of Systolic Time Intervals (STI). Each of 8 healthy volunteers received five treatments in random order: 200 and 400 mg mexiletine, 100 and 200 mg disopyramide, and placebo. There was a significant increase in cumulated PEP after 400 mg mexiletine and 200 mg disopyramide.