Thanks, Shirley. Good afternoon, and thanks for joining us. On our call today, I'll provide an overview of our first quarter results and discuss a few highlights from our two operating segments, Systems and Services and Clear Aligners. John will provide more detail on our Q1 financial performance and comment on our views for the second quarter in 2023. Following that, I'll come back and summarize a few key points and open the call to questions. Overall, I'm please report better than expected first quarter revenues and earnings. The sequential increase in first quarter revenues of 943 million reflects stability across all regions for Clear Aligner business and favorable average selling price for the Clear Aligner and Systems and Services segments. Q1 sequential growth reflects an increase in non-case revenues, which also increased year-over-year driven by continued growth from our Invisalign Doctor subscription program the Vivera Retainers. And the team segment, which represents the largest portion of the 21 million annual orthodontic case starts 182,000 teens and kids started treatment with Invisalign Clear Aligners during the first quarter, increasing both sequentially and year-over-year, which is encouraging as we head into the important summer season for teens and kids. Overall, remain confident in our large underpenetrated market opportunity globally. And our ability to deliver digital products and technology that are helping doctors transform smiles and change lives for millions of people. Processes and services in Q1 revenues of 153.3 million were down 9.7% sequentially, and 6.2% year-over-year. As expected Q1 systems and services revenues decreased sequentially consistent with seasonal capital equipment cycles compared to Q4. For Q1 system and services revenues were sequentially lower primarily in the Americas and APAC regions, offset somewhat by an increase in EMEA. For non-system scanner revenues Q1 was up sequentially in year-over-year, reflecting increased scanner rentals, upgrades and certified pre-owned or CPO leasing programs to one CPO sales and food initial shipments of leasing units to desktop metal, who's supplying iTero element flex scanners to desktop labs. One of the largest lab networks in the United States serving general dentists. On a year-over-year basis Q1 services revenues increased primarily due to higher subscription revenues resulting from the large number of iTero scanners in the field. We also had higher non-systems revenues related to our scanner leasing and rental programs previously mentioned. The Q1 total Clear Aligner of revenues of 789.8 million was up sequentially and down year-over-year. Q1 sequential revenue growth reflects increases across the regions driven by price increases favorable foreign exchange and more additional liners. Q1 non-case revenues were up sequentially and year-over-year, reflecting continued growth from DSP, Vivera Retainers in commerce sales, which include everything from a liner cases to whitening and cleaning products. DSP has been very successful and enabling doctors to purchase aligners on a subscription basis, giving them flexibility to treat simple touch up cases, or offer their patients a superior flexible and convenient retention solution. We introduce DSP in North America during the pandemic, and are continuing to expand DSP offerings in the main region. The contribution of DSP to non-case revenues is important to understand, especially the impact overall Clear Aligner volumes. While we don't report the number of DSP, Clear Aligners shipped, and we don't include them in our total Clear Aligner volumes, if we were to calculate an equivalent case shipment for touch up patients, using our DSP aligners, we estimate those cases would increase approximately 25% sequentially. Q1 call total Clear Aligner volumes of 575.4,000 were down slightly sequentially reflecting stability across regions, and improvements in consumer confidence, as well as the easing of COVID restrictions recently in China. For the Americas Q1 Clear Aligner volumes were up slightly sequentially reflecting higher orthodontic cases, especially teen case starts with growth in both Invisalign Teen case packs and Invisalign First treatment for kids as young as six, offset primarily by a decrease in adult patients from the GP dental channel. Based on the most recent gauge practice analysis tool that collects and consolidates data from approximately 700 ortho practices in North America, overall, new patient flow and adult exams were lower this period while teens outpaced adults. During this period, wires and brackets cases continue to grow ahead of Clear Aligners, although at a slower rate than in recent quarters. And Invisalign cases outpaced other Clear Aligner brands. The gauge report also included a few data points regarding no shows which are exam schedule, which we believe may provide insight into consumer sentiment and macro conditions. Regarding no shows, over the last 12 months, there's been a large increase in the number of patient no shows. However, that rate appears to be stabilized. Conversely, over the last 12 months, future exams scheduled were negative year-over-year, but the rate has steadily improved in the most recent months covered by the report, which we believe may be a good gauge for consumer optimism. For EMEA, Q1 Clear Aligner volumes include strong adoption of Invisalign moderate across the region in both the adult and team segments. Invisalign Moderate Package's a 20-stage treatment option designed for patients whose treatment goals fall between the existing Invisalign Light and Invisalign comprehensive packages. For APAC, Q1 Clear Aligner volumes reflect improvement in China and continued growth in markets like Japan, Korea and India with positive year-over-year growth, including teams. Teen orthodontic treatment is the largest segment of the orthodontic market worldwide and represents our largest opportunity for Clear Aligner sales to orthos. We continue to focus on gaining share from traditional metal prices through teen specific sales and marketing programs and product features, including Invisalign First for kids as young as six, which is up sequentially across all markets. For Q1, total Clear Aligner cases for teenagers were up sequentially and year-over-year, reflecting improving trends across the regions. On a sequential basis, growth was driven by increased submitters in the APAC and Americas region. On a year-over-year basis, teen case starts were up in EMEA region by reflecting increased utilization and the recent introduction of Invisalign moderate across the region, which outpaced the year-over-year growth rate of Invisalign First, which also continues to perform very well across markets. Invisalign First was also up sequentially and year-over-year across all regions. Invisalign First is designed to treat a broad range of -- issues in growing children from simple to complex. And because Invisalign First is removable, it's easier for kids to brush and flows. There's also no discomfort from rubbing braces or poking fires for metal braces. These benefits, along with positive compliance experience, may also contribute to continued momentum for Invisalign First. In fact, the majority of surveyed Invisalign orthodontists agreed that their young patients are highly compliant with Invisalign First treatment. Understanding that younger kids are highly compliant and Invisalign First provides an opportunity to sort of overall practice growth. The Q1 Clear Aligner volume from dental service organizations, or DSO customers continue to outpace non-DSO customers. Q1 Clear Aligner volume from DSO customers increased sequentially, reflecting growth in the Americas region. DSOs make up approximately 20% of the dental market and represent one of the most important channels for digital orthodontics and restorative dentistry. Through their network of doctors and systematic approach to clinical education and practice management, DSOs are uniquely positioned to drive adoption of new technologies and tools that increase practice efficiency and profitability and deliver a better patient experience. We have well-established relationships with many DSOs, especially in the United States, with DSOs such as Smile Docs and Heartland Dental. And we are continuously exploring collaboration with others that drive adoption of digital dentistry. Each DSO has a different strategy and business model. And our focus is working with them and encouraging DSOs align with our vision, strategy and business model goals. One of the most digitally minded DSOs is Heartland Dental. And today, we announced a $75 million equity investment in Heartland. Heartland is a multidisciplinary DSO with GDP and ortho practices across the U.S. Their growth strategy includes Heartland's de novo dental practices, which feature modern technology, are located in areas with strong community need for dentistry, where Heartland provides practices with opportunities for mentorship, leadership training and continuing education. In the last three years, Heartland opened 188 state-of-the-art de novo practices across the United States and are planning to continue investing through more de novo openings. We have a shared sense of purpose with Heartland. Their mission is to help doctors and their teams deliver the highest quality digital dental care to the communities they serve. The ban creation remains an important strategic growth driver, and we continue to invest in consumer marketing programs that create awareness of the Invisalign system and that drive demand to Invisalign practices. In Q1 '23, we delivered 7.8 billion impressions and had 22.1 million visits to our websites and continue to invest in top media platforms such as TikTok, Snapchat, Instagram and YouTube across markets. For more details on our programs and key Q1 performance metrics, please see our presentation slides on our website. We're also developing digital tools and apps for consumers, patients and for doctors. The Q1 adoption of the My Invisalign consumer and patient app continue to increase with 3.1 million plus downloads to date and over 350,000 monthly active users, representing 28% year-over-year growth. Usage of our other digital tools includes ClinCheck, Live Update, which is used by 38,000 doctors to reduce time, spent modifying treatment plans of up to 13% and Invisalign practice app with 58,000 doctors actively using this feature and uploading more than 5.1 million photos to date. Finally, in addition to our focus on consumer marketing and digital tools, we're committed to driving excellent treatment and align innovation through industry and align hosted clinical education events. Our team has just participated in the annual AAO conference, which took place in Chicago, where we engaged with a broad range of orthodontists. In March, we participated in IDS in Cologne, Germany, one of the largest dental shows in the world focused on digital dentistry and the technologies shaping the industry. Earlier in the quarter, we hosted the second align's symposium on the digital practice, a smaller align event from the most engaged in experience Invisalign orthodontists in the world. It was an amazing opportunity to come together with long-term global partners and thought leaders in orthodontics to see how we are driving the digital transformation of dentistry together. By our participation in each of these events and opportunities, we continue to reinforce the importance of peer-to-peer clinical education and our investments in the orthodontic specialty. We are grateful for all of our customers, GP, orthodontists, corporate practices but we know that the orthodontic specialty leads the way in adoption of digital orthodontics. We are excited about the future we see them in the orthodontic profession. Align abruptly supports the orthodontic profession through education, grants and continued innovation. Our educational pathway was created to support recent graduates, and we career doctors at critical career transition points. As a result of schooling and early career initiatives, graduates will be educated on digital dentistry and digital orthodontics, connected with and supported by colleagues more experienced ortho experts in the Align team and engaged with Align Digital Platform. Align supports doctors throughout all stages of their career, from educating facilities at dental schools and orthodontic programs to education for residents. Early to mid-career providers and more seasoned professionals looking to expand their clinical capabilities and practices. Align is expanding its global footprint of education centers to provide a forum for hands-on learning and continued development in key cities across our regions. We are also focused on continuing to innovate in digital dentistry, scaling capacity to manage the millions of digital requests, patient scans and orders flowing through our systems, while also using technologies like AI and machine learning to increase efficiencies, speed treatment planning and quickly deliver products so patients can begin to pass to transforming their smiles. In the next one to two or three years, Align believes our newest technologies and innovations will revolutionize our existing offerings in the ways in which doctors and their patients experience orthodontic treatment. Together with our customers, we are developing the future of digital dentistry and digital orthodontics not just the technology that drive treatment, but the models reshaping how we interact with customers and deliver treatment experiences for their patients. We look forward to sharing more with you in the coming months. With that, I'll now turn it over to John.