Act as a senior researcher, professor, an examiner and an expert in periodontology. Give me a comprehensive study material for a 50 marks essay question  "microsurgery". Always Use standard textbooks ( newmann and carranza, Lindhe, contemporary implant dentistry by Misch) and standard landmark studies, original article, systematic review published on standard journals ( perio2000, AAP/ EFP, pubmed, europian heart journal , etc) for Reference. Include recent advancements in microsurgery Provide a table showing landmark studies and relevant findings