Patients that will not agree to participate in this study or sign the consent form

More than 8mm of residual bone height at the implant site

Subjects smoking more than 10 cigarettes per day

History of acute sinus infection

History of prior maxillary sinus surgery (Caldwell-Luc, direct or indirect sinus lift, etc)

Medications that affect bone healing (chronic steroid regimen, oral or IV bisphosphonates, etc.)

Patients allergic to bovine derivatives

Patients who are a carrier of transmissible disease(s) that may unnecessarily expose laboratory personnel to risks

Females during pregnancy or lactation or females that plan to become pregnant in the following year (pregnancy test prior to enrollment)

Prospective Evaluation of Anorganic Bovine Bone Mineral Versus Calcium Phosphosilicate Alloplastic Bone Putty in Direct Sinus Augmentation: a Spilt-mouth Study