Humerus

• Exactech , a developer and producer of innovative implants, instrumentation, and smart technologies for joint replacement surgery, announced that Darin Johnson, current Exactech President, has been promoted to CEO.
• Johnson, who has served as interim CEO since March 2023, succeeds Jeffrey Binder, Chairman of Exactech’s Board of Directors.
• View the full release here: https://www.businesswire.com/news/home/20230925567645/en/
  Exactech Names Darin Johnson CEO (Photo: Business Wire)
  Johnson joined Exactech in 2002 and has since held several executive-level leadership roles with the company.
• “Darin has done an excellent job guiding Exactech over the past six months,” Binder said.

• They were among the first large terrestrial animals to evolve and did so rapidly, quickly becoming some of the most abundant plant-eating animals worldwide.
• At least 21 separate species evolved before all pareiasaurs were wiped out about 252 million years ago during the Permian-Triassic extinction event.
• One large, abundant species, Bradysaurus, from the middle Permian Period, was found in South Africa and scientifically described in 1892.
• That means both of these pareiasaurs, from different hemispheres and living in different times, weighed in at about the mass of a large adult black rhino or a large domestic bull.

A new method

• These formulas were derived from large sets of measurements of the limb bones of modern animals whose masses can be measured directly.
• These animals often had a sprawling posture and, as a result, thickened bones.
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  We used a new volumetric method to determine a more realistic mass estimate.

• If they were accurate, the density of the animal’s tissues would have been greater than sandstone or concrete.

Body size in herbivores

• Bradysaurus’s large size is best explained by a negative relationship between food digestibility and body mass.
• It predicts the evolution of large body size in herbivores that ingest copious, low-quality plant material.
• Plants are hard to digest, and a plant-based diet typically results in a large body size – herbivores are typically substantially heavier than other dietary groups in living animals.
• Alternatively, or maybe in conjunction with the evolution of herbivory, the large body size of Bradysaurus may also have evolved as protection from co-existing predators.

• NEW YORK, June 27, 2023 /PRNewswire/ -- Theodore A. Blaine, MD , a shoulder and elbow surgeon at Hospital for Special Surgery (HSS), has performed the world's first implantations of a stemmed elliptical head prosthesis for anatomic shoulder replacement surgery.
• The stemmed elliptical head enables surgeons to readily convert an anatomic total shoulder replacement prosthesis to a reverse shoulder replacement prosthesis, should a revision surgery ever be needed in the future.
• Dr. Blaine is the first surgeon in the world to use this advanced technology, placing an elliptical head on a stemmed implant.
• "The main reason for implanting a convertible prosthesis in a patient's shoulder is that an anatomic shoulder replacement provides a more normal shoulder than a reverse prosthesis in active patients.

• Features the AETOS Meta Stem - designed to maximize stability, preserve bone, and maintain patient anatomy.1, 5-7
  Indicated for both anatomic and reverse total shoulder arthroplasty.
• "Receiving FDA clearance for the AETOS Shoulder System is a major milestone for Smith+Nephew.
• The AETOS Shoulder System is the latest solution in Smith+Nephew's expanding Upper Extremity portfolio and complements our market leading Sports Medicine shoulder repair and biologics solutions.
• The AETOS Shoulder System will be showcased this week at the San Diego Shoulder Institute's annual shoulder course in Coronado, CA.