NEET MDS 2026: MERITERS PREDICTIONS | Prosthodontics - 15 MOST LIKELY Question Topics
The Philosophy
"Prosthodontics is mechanical engineering applied to human biology. Every design choice - from pontic shape to clasp assembly- is a battle between retention, resistance, and tissue preservation."
A targeted breakdown of the highest priority topics based on recent question patterns and examiner logic.
1. Articulators & Facebows
High PriorityCore Focus
- Arcon (condyle on lower member) vs Non-Arcon (condyle on upper)
- Kinematic Facebow (locates true hinge axis) vs Arbitrary Facebow
- Class III Semi-adjustable Articulators (Hanau, Whip Mix)
NEET MDS LOGIC
Foundational concepts. ARCON stands for ARticulator CONdyle. Remember: Human skull is an Arcon. They frequently test which facebow is used for which articulator.
Framing: "Which type of articulator has the condylar elements attached to the lower member, simulating the human temporomandibular joint?"
Past Question Patterns
- NEET MDS 2024: Essential difference between Arcon and Non-Arcon articulators.
- NEET MDS 2022: Purpose of a facebow transfer.
- NEET MDS 2020: The Kinematic facebow determines the.
- INI-CET 2021: Example of a Class III semi-adjustable articulator.
2. Mandibular Movements & Envelope
Core Focus
- Posselt's Envelope of Motion (Sagittal, Horizontal, Frontal planes)
- Bennett Movement (Immediate lateral shift of working condyle)
- Hanau's Formula for Lateral Condylar Guidance: L = H/8 + 12
NEET MDS LOGIC
Pure biomechanics. You must be able to trace Posselt's envelope and identify Centric Relation (CR), Maximum Intercuspation (MI), and Edge-to-Edge positions. Hanau's formula is a classic numeric recall.
Framing: "In Hanau's formula (L = H/8 + 12), the 'H' represents the?"
Past Question Patterns
- NEET MDS 2025: According to Hanau's formula, L = H/8 + 12, 'H' stands for.
- NEET MDS 2022: The bodily lateral movement of the mandible towards the working side is termed.
- NEET MDS 2019: Most superior point on Posselt's sagittal envelope of motion.
- AIIMS 2020: The Bennett angle is formed by the path of the (Non-working condyle) during lateral excursion.
3. CD: Impression Philosophies
Core Focus
- Mucostatic (Passive, no pressure) vs Mucocompressive (Functional pressure)
- Selective Pressure Theory (Boucher): Pressure on stress-bearing areas, relief on non-stress areas
- Primary Stress-Bearing Areas: Buccal shelf (Mandible), Hard palate/Residual ridge (Maxilla)
NEET MDS LOGIC
Examiners test your understanding of anatomy combined with technique. The buccal shelf is primary in the mandible because its bone is dense cortical and perpendicular to occlusal forces.
Framing: "According to the selective pressure theory, which anatomical landmark acts as the primary stress-bearing area in a mandibular complete denture?"
Past Question Patterns
- NEET MDS 2024: Primary stress-bearing area in the mandibular arch.
- NEET MDS 2021: Impression technique advocating recording tissues in their undisplaced, resting state.
- NEET MDS 2020: Relief area in the maxillary arch.
- INI-CET 2019: Reason the buccal shelf is a primary stress-bearing area.
4. CD: Vertical Dimension (VDO & VDR)
Core Focus
- Freeway Space (Interocclusal distance) = VDR - VDO (Usually 2-4 mm)
- Consequences of Increased VDO: Clicking teeth, muscle fatigue, elongated face
- Consequences of Decreased VDO: Angular cheilitis, sunken lips, reduced masticatory efficiency
NEET MDS LOGIC
Mathematical and clinical correlation. If you open the bite too much (Increased VDO), the patient's teeth click when talking. If closed too much, saliva pools at the corners of the mouth (Angular cheilitis).
Framing: "A complete denture patient complains of 'clicking' sounds during speech and generalized muscle fatigue. The most likely cause is?"
Past Question Patterns
- NEET MDS 2023: Clinical consequence of excessive Vertical Dimension of Occlusion.
- NEET MDS 2022: Formula for calculating Freeway Space.
- NEET MDS 2020: Normal range for resting interocclusal distance / freeway space.
- AIIMS 2018: Angular cheilitis in a denture wearer is most commonly associated with.
5. CD: Centric Relation (CR)
Core Focus
- Definition: Bone-to-bone relation, anterosuperior position against the articular eminences
- Independent of tooth contact; a repeatable reference position
- Methods of recording: Gothic arch tracing, swallowing method, chin point guidance
NEET MDS LOGIC
CR is the starting point of all full-mouth rehabilitations because it is the only repeatable position when teeth are missing. Know the definitions and tracing methods.
Framing: "Which maxillomandibular relationship is defined as a bone-to-bone relation that is independent of tooth contact?"
Past Question Patterns
- NEET MDS 2024: The most reliable and repeatable maxillomandibular position for fabricating complete dentures.
- NEET MDS 2021: The apex of a Gothic arch tracing represents.
- NEET MDS 2019: In Centric Relation, the condyles articulate in which position?.
- INI-CET 2021: Which method relies on patient's physiological function to record CR?
6. CD: Balanced Occlusion & Hanau's Quint
Core Focus
- Hanau's Quint: Condylar guidance, Incisal guidance, Plane of occlusion, Compensating curve, Cusp inclination
- Thielemann's Formula: (CG x IG) / (PO x CC x CI) = Balanced Occlusion
- Curves: Spee (Anteroposterior), Wilson (Mediolateral), Monson (3D spherical)
NEET MDS LOGIC
Balanced occlusion prevents denture tipping during eccentric movements. You must know which factors the dentist can control (Cusp inclination, Compensating curves, Incisal guidance) and which they cannot (Condylar guidance).
Framing: "According to Hanau's Quint, which of the following factors of occlusion is entirely dictated by the patient's anatomy and cannot be altered by the dentist?"
Past Question Patterns
- NEET MDS 2025: Factor in Hanau's Quint that is fixed and cannot be modified by the dentist.
- NEET MDS 2022: Primary purpose of providing compensating curves in complete dentures.
- NEET MDS 2020: The mediolateral curve that contacts the buccal and lingual cusp tips is called the.
- AIIMS 2019: Thielemann's formula relates to the laws of.
7. RPD: Kennedy Classification
Core Focus
- Class I (Bilateral distal extension), Class II (Unilateral distal extension)
- Class III (Unilateral bounded), Class IV (Anterior crossing the midline)
- Applegate's Rules: Rule 5 (Most posterior area determines class), Rule 6 (Additional areas are modifications), Class IV cannot have modifications
NEET MDS LOGIC
Absolutely guaranteed question. You will be given a missing tooth scenario and asked to classify it. Always classify based on the MOST posterior edentulous area.
Framing: "A patient presents with missing teeth 36, 37, 46, and 47. According to Kennedy's classification, this is?"
Past Question Patterns
- NEET MDS 2024: Patient missing only maxillary incisors crossing the midline. Classification?
- NEET MDS 2022: According to Applegate's rules, the classification is always determined by the.
- NEET MDS 2021: Which Kennedy classification cannot have any modification spaces?
- INI-CET 2020: Kennedy Class II refers to a.
8. RPD: Major Connectors
Core Focus
- Maxillary: Anteroposterior palatal strap (Most rigid), U-shaped (Least rigid, used for prominent tori)
- Mandibular: Lingual bar (Requires 8mm space), Lingual plate (Used if <8mm space or high frenum attachment)
NEET MDS LOGIC
Measurements and indications are key. For a lingual bar, you need 3mm for the bar and 5mm clearance from the gingival margin (Total 8mm). If you don't have it, use a lingual plate.
Framing: "A patient requires a mandibular RPD but has a high lingual frenum attachment leaving only 5mm of space from the gingival margin to the floor of the mouth. The major connector of choice is?"
Past Question Patterns
- NEET MDS 2023: Minimum space required from the free gingival margin to the floor of the mouth for a Lingual Bar (8 mm).
- NEET MDS 2021: Major connector of choice when a large, inoperable maxillary torus is present (U-shaped/Horseshoe palatal connector).
- NEET MDS 2019: The most rigid maxillary major connector
- AIIMS 2018: Indication for a mandibular lingual plate.
9. RPD: Direct Retainers & RPI System
Core Focus
- Components of a Clasp: Retentive arm (flexible tip), Reciprocal arm (rigid, stabilizes)
- RPI System (Rest, Proximal Plate, I-bar): Used for distal extensions to prevent torquing of abutment
- Undercut measurements:
-
1) Cast chrome alloy -> 0.010 inch undercut.
2) Gold alloy -> 0.015 inch undercut.
3) Wrought wire alloy -> 0.020 inch undercut.
NEET MDS LOGIC
The RPI system is specifically designed for Class I and II cases. When the patient bites on the distal extension base, the I-bar disengages, saving the abutment tooth from being torqued backward.
Framing: "The primary biomechanical advantage of the RPI clasp assembly in a distal extension RPD is?"
Past Question Patterns
- NEET MDS 2024: Component of the RPI clasp assembly that engages the undercut.
- NEET MDS 2022: Recommended undercut depth for a cast Cobalt-Chromium retentive clasp tip.
- NEET MDS 2020: Purpose of the reciprocal arm of a clasp assembly.
- INI-CET 2021: In an RPI system, during occlusal loading of the denture base, the I-bar moves.
10. RPD: Indirect Retainers
Core Focus
- Function: Prevents the distal extension base from lifting away from the tissues (sticky food)
- Fulcrum line: Imaginary line passing through the most posterior rest seats
- Placement: As far anterior to the fulcrum line as possible, perpendicular to it
- Types of indirect retainers: auxiliary occlusal rest, canine extension from occlusal rest, Incisal rest, lingual rest, continuous bar retainers and lingual plate, rugae support.
NEET MDS LOGIC
Indirect retainers are mandatory for Class I and II RPDs. They act as the 'anti-tipping' mechanism. The most common form is a rest seat placed on a canine or premolar.
Framing: "To maximize its effectiveness, an indirect retainer in a Kennedy Class I RPD should be placed?"
Past Question Patterns
- NEET MDS 2025: The axis around which an RPD rotates when the base moves away from the tissue is the.
- NEET MDS 2021: Primary function of an indirect retainer.
- NEET MDS 2019: Ideal location for an indirect retainer
- AIIMS 2018: Kennedy classifications that mandate the use of indirect retainers.
11. RPD: Principles of Tooth Preparation
Core Focus
- Retention Form: Resists displacement along the path of insertion (pulling off sticky candy)
- Resistance Form: Resists dislodgment by apical or oblique forces (chewing)
- TOC (Total Occlusal Convergence): Ideal is 6 degrees (3 degrees per wall)
NEET MDS LOGIC
Retention vs Resistance is a classic trap. Taller walls and less taper equal better retention and resistance. If a prep is too short or too tapered, add proximal grooves to increase resistance.
Framing: "The ability of a tooth preparation to resist dislodgment of a restoration by forces directed obliquely or apically is termed"
Past Question Patterns
- NEET MDS 2024: Ideal total occlusal convergence (taper) for a full crown preparation.
- NEET MDS 2022: Difference between Retention and Resistance form.
- NEET MDS 2024: Ideal total occlusal convergence (taper) for a full crown preparation (6 degrees).
- NEET MDS 2022: Difference between Retention and Resistance form.
- NEET MDS 2020: Feature added to a short, over-tapered preparation to improve resistance form (Proximal grooves or boxes).
- INI-CET 2021: Path of insertion should ideally be parallel to the
- Feature added to a short, over-tapered preparation to improve resistance form.
- INI-CET 2021: Path of insertion should ideally be parallel to the.
12. FPD: Finish Lines & Biological Width
Core Focus
- Chamfer: Used for all-metal crowns (Cast gold, base metal)
- Shoulder (90-degree): Used for All-Ceramic crowns (provides bulk for ceramic)
- Biological Width: Epithelial attachment (0.97mm) + Connective tissue attachment (1.07mm) = 2.04mm
NEET MDS LOGIC
Match the finish line to the material. Ceramics need 90-degree shoulders for structural support to prevent fracture. Violating the biological width causes chronic gingival inflammation.
Framing: "Which type of gingival finish line is specifically indicated for an all-ceramic anterior crown to prevent fracture of the restoration?"
Past Question Patterns
- NEET MDS 2023: Finish line of choice for a cast metal crown.
- NEET MDS 2021: Recommended finish line for an all-ceramic crown.
- NEET MDS 2019: Average dimension of the Biological Width.
- AIIMS 2020: Consequence of placing a crown margin deep into the biological width.
13. FPD: Pontic Design
Core Focus
- Modified Ridge Lap: Most commonly used in aesthetic zones (Anteriors/Premolars)
- Sanitary / Hygienic: 2mm clearance from tissue, used for posterior mandible
- Ovate: Highly aesthetic, appears to emerge from the gingiva, requires surgical site prep
NEET MDS LOGIC
Pontic design balances aesthetics and hygiene. A true 'ridge lap' (saddle) is contraindicated because it is uncleanable. The modified ridge lap only contacts the facial aspect of the ridge.
Framing: "Which pontic design is considered the most aesthetically pleasing for maxillary anterior teeth but requires surgical contouring of the residual ridge?"
Past Question Patterns
- NEET MDS 2025: Pontic design strictly contraindicated due to inability to maintain hygiene.
- NEET MDS 2022: Most commonly used pontic design for the aesthetic zone.
- NEET MDS 2020: Pontic design of choice for a mandibular molar replacement where aesthetics is not a concern.
- INI-CET 2019: Key feature of an Ovate pontic.
14. FPD: Connectors & Pier Abutments
Core Focus
- Rigid connectors: Cast, soldered, or welded
- Non-rigid connectors (Key-Keyway): Relieves stress on pier abutments
- Placement: Keyway (female) placed on the DISTAL of the pier abutment
NEET MDS LOGIC
A 'pier' abutment is a freestanding abutment with edentulous spaces on both sides. If you use a rigid 5-unit bridge, the pier acts as a fulcrum, causing the terminal retainers to fail. Use a non-rigid connector (stress breaker).
Framing: "In a 5-unit fixed partial denture utilizing a pier abutment, the keyway (female portion) of the non-rigid connector should be placed on the..."
Past Question Patterns
- NEET MDS 2024: Primary indication for using a non-rigid connector in an FPD.
- NEET MDS 2021: Placement rule for the keyway in a pier abutment FPD.
- NEET MDS 2019: Reason for placing the keyway on the distal.
- AIIMS 2018: A rigid connector is typically fabricated by.
15. Implant Prosthodontics Basics
Core Focus
- Osseointegration: Direct structural and functional connection (Titanium dioxide layer)
- Minimum Distances: 3mm between implants, 1.5mm between implant and tooth
- Implant-Supported Overdentures: Requires minimum of 2 implants in the mandible
NEET MDS LOGIC
These numerical values are heavily tested. If implants are placed too close (<3mm), crestal bone loss occurs due to overlapping of their stress fields.
Framing: "To prevent crestal bone loss, the minimum recommended distance between two adjacent dental implants is..."
Past Question Patterns
- NEET MDS 2023: Minimum distance required between two adjacent dental implants.
- NEET MDS 2022: Definition of Osseointegration.
- INI-CET 2021: Minimum distance between an implant and adjacent natural tooth.
Topper Logic
Always visualize the Fulcrum Line in RPD and the Path of Insertion in FPD. If you know where the prosthesis wants to rotate or dislodge, you instantly know where to place the indirect retainer or parallel the guiding planes.
Updated Apr 02, 2026.
