Description
WHAT IS IT
The “DURAVIT CRESTAL SINUS LIFT” is an innovative kit to prepare the implant site near the Schneider membrane. The kit includes “Compactor-Expanders” (newly-designed manual osteotome) for a “Manual key”, depth stops for different lengths and “Push-pin” to push the bone regeneration material within the crest.
WHAT IS IT FOR
The “DURAVIT CRESTAL SINUS LIFT” technique accomplishes a controlled crestal osteotomy with the lifting of the maxillary sinus membrane in extremely simplicity and safe conditions, even in cases of minimal crestal residual.
A wide range of Safety Implant Membrane (S.I.M.), available in various shapes and sizes, avoids the risk of implants entering in the sinus cavity.
EQUIPMENT
The Compactors-Expanders “DURAVIT CRESTAL SINUS LIFT” are equipped with depth stops that allow obtaining a guided hole in the alveolar bone as close as possible to the maxillary sinus membrane.
The innovative system was designed to obtain the controlled fracture of the bone floor through a 1 mm step-by-step progress.
WHEN SHOULD IT BE USED
The “DURAVIT CRESTAL SINUS LIFT” technique can be used in case of 4 to 9 mm residual bone availability and in any sufficient anatomic condition to stabilize the implant in the implant site.
GRAFTING MATERIALS AND QUANTITY
B & B Dental has patented and developed as material for bone regeneration the Novocor Plus. The medical device includes grains of natural coral with a low surface/volume, ranging from 200 to 500 mm.
The natural coral , also known as coralline hydroxyapatite, includes 98% Aragonitic Calcium Carbonate (CaCO3). However any type of certified regeneration material can be use with the technique.
The amount of graft material is difficult to establish a priori, since this depends on the shape of the sinus conformation and the importance of the lifting: references can only be given by intra-operatory X-rays performed with the aid of Rinn technique.
IMPLANTS LOADING TIME
As for all the implants inserted with any sinus lift technique the exposure time of the implants is related to the initial height of the crestal bone: when it is 6/7mm or more, we can expose after 6/7 months, when it’s less (4/5 mm) we must delay the exposure to about 10/11 months after surgery.
In case of old prosthesis, the patient can wear it again after about 10 days, unless complications. It’s important to unload the prosthesis on the fresh wound to avoid compression.
PRECAUTIONS
Appropriate X-rays (OPG and CT-scan), direct palpations and inspections of the operating site are necessary to identify the anatomy of the available bone.
ADVANTAGES
The technique is straight forward and atraumatic and since the cortical bone is perforated and not fractured, the risk of accidental laceration of the membrane is prevented. Using the specific sequence of compactor-expanders and stops, the clinician slowly approaches the Schneiderian membrane. The shape of the compactor-expanders tip prevents the perforation of the membrane.
