Macular buckle without vitrectomy for myopic macular schisis: a Canadian case series

Objective

To determine the effectiveness of a macular buckle procedure without vitrectomy for the treatment of symptomatic myopic macular schisis.

The effect of fissure morphology and eruption time on penetration and adaptation of pit and fissure sealants: An SEM study

This study was designed to examine the effect of fissure morphology on penetration and adaptation of fissure sealants and their relationship with the eruption time of tooth. Materials and Methods: One hundred and fifty extracted molars and premolars were divided into two groups on the basis of their eruption time. The two groups were further divided into five subgroups on the basis of fissure morphology. An scanning electron microscopic analysis of penetration and adaptation of sealant was done. Observations and Results: V- and U-shaped fissures were found to have the maximum penetration. Penetration was very poor for I- and IK-types of fissures. No significant difference in penetration was found in relation to eruption time. Adaptation of sealant was not affected by any of the factors. Conclusion: Even the well-applied sealant does not necessarily provide complete obturation of pits and fissures, thus necessitating periodical clinical observation to determine the success or potential failure of the sealant treatment.     

Bisphosphonate-associated osteonecrosis. A clinician's reference to patient management

Bisphosphonates, as inhibitors of osteoclasts, are widely used in the management of metastatic bone disease and in the prevention of osteomalacia and osteoporosis. Recent cases of bone necrosis of the jaws have been associated with the use of bisphosphonate therapy. A case is presented of a patient with osteonecrosis of the maxilla with a history of long-term bisphosphonate therapy for metastatic breast cancer. The authors treated the patient and suggest appropriate patient management guidelines with reference to current knowledge. Although a definitive treatment for bisphosphonate-associated osteonecrosis has not yet been established, clinicians must be aware of the pharmacologic properties of several bisphosphonates currently available and their indications, susceptible risk factors in the development of osteonecrosis of the jaws, the clinical signs and symptoms, and recommendations for patient management, including prevention and early recognition.     

Posterior neonatal teeth

Teeth which are present in the oral cavity of newborn infant at the time of birth are called "natal teeth" and which erupts in first month of postnatal life are called as "neonatal teeth." The incidence of these teeth is 1 in 2000 to 1 in 3500 live birth. The most common natal teeth reported are mandibular central incisors followed by maxillary incisors and mandibular canine. The natal or neonatal tooth in maxillary molar region is a rare occurrence. This article represents a rare case of bilateral neonatal maxillary molar teeth.     

Comparison of two-dimensional manual and three-dimensional SurgiCase and BLUEPRINT planning software measurements of glenoid version,inclination, and humeral subluxation

IntroductionVirtual planning for shoulder arthroplasty using preoperative computed tomography (CT) has been gaining popularity, and it is imperative for surgeons to recognize any differences in measurements that may exist amongst software platforms. The purpose of this study is to compare measurements of glenoid version, inclination, and humeral head subluxation between a manual approach and two varying automated software platforms using either a best-fit sphere technique (Wright-Medical BLUEPRINT) or an anatomic landmarks technique (Materalise SurgiCase).MethodsA case control study of 289 CT images from patients preoperatively planned for a total shoulder arthroplasty or reverse shoulder arthroplasty using SurgiCase (v3.0.110.5) were also successfully analyzed by BLUEPRINT (v2.1.6). Glenoid version, inclination, and subluxation were measured manually in a blind fashion by two separate investigators using axial and coronal images oriented to the scapular plane; interobserver and intraobserver reliabilities were measured using intraclass correlation coefficients (ICCs). Concordance correlation coefficients (CCCs), mean differences, and clinically relevant agreement in measurements between the software platforms and with the manual technique were compared. The impact of greater glenoid retroversion on the differences in measurements between the software platforms was further studied by correlation analysis.ResultsThe mean differences between SurgiCase and BLUEPRINT were + 0.5° for glenoid inclination (P = .064; CCC = 0.84), -0.9° for glenoid version (P < .001; CCC = 0.92), and -1.4% for humeral subluxation (P = .002; CCC = 0.88). Agreement within 5 units was 78.9% for inclination, 89.3% for version, and 64.1% for subluxation. Glenoid retroversion had no relation with the degree of variation in measured inclination (P = .59) or version (P = .56). There were significant differences between manual and 3D software measurements for glenoid inclination, version, and subluxation (P < .001). Both software measurements were more inferiorly inclined (average difference, SurgiCase -3.2° and BLUEPRINT -3.9°), more retroverted (average difference, SurgiCase -4.0° and BLUEPRINT -3.2°), and more posteriorly subluxated (average difference, SurgiCase + 3.4% and BLUEPRINT + 4.8%).ConclusionThe SurgiCase and BLUEPRINT preoperative planning software yield clinically similar measurements for glenoid version, inclination, and subluxation. The degree of glenoid retroversion does not impact the variability of inclination or version between the landmark and best-fit sphere software techniques. Compared to the 2D manual technique, both 3D software programs reported greater inferior inclination, retroversion, and posterior subluxation.Level of evidenceLevel III; Retrospective Diagnostic Study