What is a SEMCD? Suction Effective Mandibular Complete Denture

Front of photo Dr. Jiro Abe. From L-R Kyouko Kokubo Dental Technician, Dr. Martin Richie Aberdeen, Cole Merkley Denturist Canada, Dr. Fumiaki Yamazaki and Paul McNally Clinical Dental Technican SEMCD Instructor No. 27 in the world

Up to now, one of the most difficult patients to treat is the complete edentulous patient, with the lower denture being the most difficult of all to achieve a satisfactory result. The revolutionary concept of eliminating the problem of lower denture ‘floating’ and ‘lifting’ by creating an effective seal around the entire denture border through suction mechanism has been spreading worldwide. Dr. Jiro Abe, is a professor of Tohoku university and a founder of the Japan Denture Association, along with many other accolades. In 1999 after almost a decade of research he developed the suction mechanism whereby a complete seal is developed around the entire denture border through a specialised impression taking procedure and an extremely accurate measurement of the patients jaw position. This impression technique has been combined with the B.P.S Bionfuctional Prosthetic System (Ivoclar Vivadent), to create the most stable complete lower (mandibular) denture on the market today without the use of Implants.

A Suction Effective Mandibular Complete Denture, often referred to simply as a “suction denture,” is a type of complete lower denture designed to improve stability and retention in the lower jaw without relying on adhesives or dental implants. This type of denture is designed to create a suction seal between the denture and the natural tissues of the lower jaw, particularly the mucosal lining of the mouth. The goal is to enhance the denture’s stability, making it less likely to move or dislodge during everyday activities like eating and speaking.


Key Features of Suction Effective Mandibular Complete Dentures:

Improved Retention: Suction dentures aim to achieve better retention in the lower jaw compared to traditional complete dentures. This enhanced retention helps prevent issues like slippage or dislodgment that some individuals may experience with conventional dentures.

Custom Design: Creating an effective suction denture involves careful customization to the individual’s oral anatomy. Dentists may use specialized techniques and impression materials to capture the unique contours of the lower jaw and mucosal tissues.

Mucosal Seal: The key to the suction effect is the creation of a tight seal between the denture base and the mucosal lining of the mouth. This seal relies on the natural suction and adhesive properties of saliva.

Reduced Reliance on Adhesives: Suction dentures reduce or eliminate the need for denture adhesives or pastes, which can be messy and may not provide long-lasting retention.

Enhanced Comfort: When properly designed and fitted, suction dentures can be more comfortable to wear since they stay securely in place, minimizing irritation or sore spots that can result from movement.

Improved Chewing Efficiency: The stability of suction dentures can enhance a person’s ability to chew food effectively, promoting better digestion and nutrition.

Speech Improvement: With better denture stability, speech difficulties that can be associated with loose-fitting dentures are minimized.

It’s important to note that achieving an effective suction seal with mandibular complete dentures can be challenging and may not be possible for all patients. Success depends on the individual’s oral anatomy, the expertise of the dentist or prosthodontist, and the denture design and fit. Therefore, not all complete lower dentures will have a suction effect.