Mounting Artikulator

Summary

This tutorial demonstrates the process of mounting dental working models on an articulator for partial denture cases. Dr. Rah Hidayat from FKG Unisula Semarang explains how to position the upper and lower jaw models, ensuring proper maxillomandibular relationships (MMR) to simulate a patient’s bite. The tutorial covers using a standard articulator to align the jaw models, setting occlusal tables, and applying gypsum for stability. The goal is to ensure that the articulator replicates the patient’s jaw movements, facilitating accurate prosthetic design. The procedure emphasizes precision in positioning to achieve optimal results in dental prosthesis fitting.

Takeaways

• 😀 The video tutorial focuses on mounting partial denture models on an articulator for dental professionals.
• 😀 Dr. Rah Hidayat demonstrates the process of positioning the upper and lower models after bite registration (MMR) is completed.
• 😀 The articulator used in the tutorial is a 'GC' articulator, which is designed to simulate the patient’s jaw movements.
• 😀 Key components of the articulator include the vertical post, incisal pin, occlusal table, and metal plate for securing models.
• 😀 The occlusal table is used to stabilize the upper model, with vertical and horizontal lines for precise alignment.
• 😀 The gypsum mixture (Stone Gypsum Type 1) is essential for mounting the models securely onto the articulator.
• 😀 The upper model should be positioned with the central incisors aligned to the intersection of vertical and horizontal lines on the occlusal table.
• 😀 The vertical post and incisal pin must contact the model at specific points to ensure accurate alignment of the bite.
• 😀 For the lower denture model, the articulator is flipped, and the bite registration is checked for proper fit.
• 😀 The gypsum mixture is carefully applied, ensuring that the vertical post contacts the incisal table, and the model is left to set for 30-40 minutes.
• 😀 The process concludes with the upper and lower models securely mounted on the articulator, ready for further dental procedures.

Q & A

What is the purpose of mounting dental models on an articulator?

The purpose of mounting dental models on an articulator is to simulate the patient's jaw movements and maxillomandibular relationship (MMR). This helps in accurately designing and fitting dental prostheses such as partial removable dentures.

What are the main components of the articulator mentioned in the tutorial?

The main components of the articulator include the vertical pin, incisal pin, and the articulator's joints that represent the temporomandibular joints (TMJ). The vertical pin indicates the position of the patient's nose, while the incisal pin aligns with the central incisor.

What is the significance of the 23mm measurement in the tutorial?

The 23mm measurement is based on the average distance from the tip of the nose to the central incisor of a Caucasian individual, which is used as a reference in a standard articulator. This distance may need adjustments for patients with different anatomical features, such as those with a flatter nose bridge.

How does the articulator help in simulating jaw movements?

The articulator simulates jaw movements by allowing adjustments for lateral movements (left and right), protrusive movements (forward), and opening/closing movements. These movements are essential for ensuring the prosthetic aligns with the patient’s natural jaw function.

What is the role of the occlusal table in the mounting process?

The occlusal table holds the upper jaw model in place during mounting. It has vertical and horizontal reference lines that ensure proper alignment of the models, particularly aligning the midline of the upper and lower jaws for accurate bite registration.

What is the difference between the three types of articulators mentioned?

The three types of articulators are: average (non-adjustable), semi-adjustable, and fully adjustable. The average articulator uses a fixed measurement (23mm) and does not allow for individualized adjustments of jaw movements. Semi-adjustable and fully adjustable articulators allow for customization of jaw movements, including lateral and protrusive motions, to better match the patient's anatomy.

What type of gypsum is used for mounting the models on the articulator?

The gypsum used for mounting the models is type 1 clear stone gypsum, specifically the 'Plaster of Paris' variety, which is mixed with water to create a moldable consistency for securely positioning the dental models on the articulator.

Why is it important to maintain the correct positioning of the models during the mounting process?

Maintaining the correct positioning of the models ensures that the bite alignment and jaw movements are accurately replicated. Any deviation could lead to an incorrect fitting of the dental prosthesis, affecting the patient’s comfort and functionality.

What should be done if the patient has lost their central incisors?

If the patient has lost their central incisors, the midline reference is taken from the bite rim (B.R.M.) instead of the central incisors. This ensures that the upper and lower models are correctly aligned along the midline for proper bite registration.

How long does it take for the gypsum to set and secure the models on the articulator?

The gypsum typically takes about 30 to 40 minutes to set and fully secure the dental models onto the articulator. This time allows the gypsum to harden sufficiently to maintain the model's position during further procedures.