I have a patient with a narrow maxillary ridge in maxillary left first premolar, second premolar and first molar areas. In order to place implants in the first and second premolar sites, I will need to do a ridge split. In the first molar site, there is only about 2mm of vertical bone height. I would like to do a sinus lift in the first molar site in order to place the implant, but the patient has declined. As an alternate treatment plan, I am thinking of making a 3-unit implant bridge with the first molar cantilevered off the splinted premolars. I have never done this before. What would you recommend?