Retentive properties of a threaded split post with attachment sleeves cemented with various luting agents

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Prosthodontics

Background:

• The threaded split post system is a common prosthetic device.
• Optimizing cement retention is crucial for long-term restoration success.
• Surface treatments like sandblasting may enhance luting agent adhesion.

Purpose of the Study:

• To evaluate the effect of sandblasting on the retention of stainless steel attachment sleeves.
• To compare the retentive strength of different luting agents (zinc oxyphosphate cement and three composite resin cements) with sandblasted and non-sandblasted sleeves.

Main Methods:

• Four luting agents were tested: zinc oxyphosphate cement (ZOP) and three composite resin cements (CRC).
• Attachment sleeves (Nos. 1-3) were divided into two groups: non-sandblasted and sandblasted.
• Retention was measured in pounds using a universal testing machine.
• A 2x3x4 factorial three-way analysis of variance was employed.

Main Results:

• Non-sandblasted No. 3 sleeves showed significantly greater retention with Panavia CRC compared to All-Bond CRC or ZOP.
• Sandblasting did not statistically affect retention for No. 1 sleeves.
• For sandblasted Nos. 2 and 3 sleeves, ZOP and Panavia CRC demonstrated significantly higher retention than All-Bond CRC.
• Mean retention loads for sandblasted Nos. 2 and 3 sleeves were substantially greater than their non-sandblasted counterparts.

Conclusions:

• Sandblasting significantly enhances the retention of Nos. 2 and 3 stainless steel attachment sleeves, particularly when using ZOP or Panavia CRC.
• The No. 1 sleeve's retention is not significantly influenced by sandblasting or the luting agent used.
• Surface preparation via sandblasting is a viable method to improve prosthetic attachment retention for specific sleeve types.