Denture Tooth Setup Calculator

Arch Type is what actually decides Total Teeth here -- a full arch (Full Upper or Full Lower) is set up with 6 anterior and 8 posterior teeth (14 total; the 8 posterior teeth are the arch-wide premolar+molar total, not a per-side count, and exclude third molars), a partial arch with 4 and 6 -- and no other input changes that count at all; Ridge Width has no bearing on how many teeth are placed, only on the Ridge-Lap Form Consideration flag. Space Required sums real per-tooth mesiodistal widths for a full arch's six anterior teeth (2 central incisors + 2 lateral incisors + 2 canines, using different maxillary vs. mandibular widths for each type) plus the posterior teeth at a flat average width; a partial arch's 4 anterior teeth don't map onto one fixed tooth composition, so this calculator falls back to the mean per-tooth width across the three anterior tooth types as a simplification -- and it has no input for how many teeth are actually missing, so treat partial-arch Space Required as a rough planning figure rather than a case-specific measurement. Space Available is simply Ridge Arch Length passed straight through -- more ridge length always means more available space, one-to-one. Needs Smaller Mold flags when Space Required exceeds Space Available by more than 5%, prompting a narrower tooth mold rather than silently proceeding with a setup that won't fit.

Incisal Guidance Angle -- the angle between the occlusal plane and the line joining the maxillary and mandibular central incisal edges, per GPT-9 (Glossary of Prosthodontic Terms 9) -- comes from Overbite (the vertical component) and Overjet (the horizontal component) through this calculator's own geometric derivation of that definition; a deeper Overbite relative to Overjet produces a steeper angle, and at Overjet = 0 the relationship is purely vertical, so the angle is 90 degrees. This is a distinct measurement from the true occlusal plane angle, which GPT-9 defines separately as roughly fixed near 10 degrees to Frankfort horizontal and which this calculator does not compute. Ridge-Lap Form Consideration uses a ridge-width threshold that is this calculator's own heuristic, not a published clinical standard -- GPT-9 defines "ridge lap" only qualitatively (a tooth form enveloping both the buccal and lingual surfaces of the ridge), with no published millimeter cutoff, so treat this output as a prompt for clinical judgment, not a determination. Vertical Dimension of Occlusion is collected as a clinical input, is shown alongside the other results for your setup notes, but does not currently feed into Incisal Guidance Angle, Space Required, or any other calculated output on this page.