What is the main factor influencing the decision to increase occlusal height in extensive oral reconstruction?

The decision to increase occlusal height during extensive oral reconstruction primarily relies on the interocclusal distance being physiologically acceptable. This distance is critical for ensuring that the patient's bite aligns correctly and that there is adequate space for the restoration without causing undue stress on the temporomandibular joint or affecting the functionality of the surrounding teeth and structures.

An increase in occlusal height must consider the relationship between the lower and upper dental arches, as any adjustments made should allow for a comfortable and functional bite. If the interocclusal distance is maintained within physiological limits, it supports proper occlusion, speech, and aesthetics, ensuring that the reconstructed dentition functions effectively in the long term.

While other factors like aesthetics, tooth bulk for retention, and the condition of the alveolar process are indeed important in the context of overall treatment planning, they do not address the immediate functional implications of how the upper and lower jaws relate to each other when occlusal height is modified. Hence, the physiological acceptability of the interocclusal distance stands out as the most influential factor in this decision-making process.